[ RadSafe ] [Nuclear News] Nuclear power's 'green' credentials under fire
Sandy Perle
sandyfl at cox.net
Thu Dec 13 09:37:15 CST 2007
Index:
Nuclear power's 'green' credentials under fire
How risky is the new era of nuclear power?
Nuclear shutdown causing political meltdown in Ottawa
Russia and Iran agree nuclear power station timetable
Japan Nuclear Energy Drive Compromised by Conflicts of Interest
Report: Total Chief Wants to Become a Nuclear Power Supplier
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Nuclear power's 'green' credentials under fire
SINGAPORE - Nuclear power's claim to be the answer to global warming
is being questioned by reports suggesting mining and processing of
uranium is carbon intensive.
While nuclear power produces only one 50th of the carbon produced by
many fossil fuels, its carbon footprint is rising, making wind power
and other renewable energies increasingly attractive, according to
environmental groups and some official reports.
The nuclear industry has come under fire over safety concerns for
decades, but a growing recognition of the threat of climate change
has put a renewed focus on the amount of greenhouse gas emissions
produced throughout the energy chain.
"Nuclear is a climate change red herring," said Ben Ayliffe, Senior
Climate and Energy Campaigner at Greenpeace.
"There are safer, more reliable alternatives, like energy efficiency
and renewables as part of a super-efficient decentralised energy
system."
While the earth's crust still has large resources of uranium - 600
times more than gold - much of the highest grade ore bodies are
already being exploited, forcing miners to develop more technically
challenging or lower grade resources.
That means uranium mining requires much more energy.
One example is Cameco's Cigar Lake project in Saskatchewan, which has
been plagued with setbacks caused by floods at the underground mine,
which may one day supply over 10 per cent of the world's mined
uranium.
The problems have forced Cameco to push back the production start to
2011 from 2007, and analysts this week said further delays out to
2012 or 2013 were likely.
"The potential is that nuclear will increase its carbon footprint due
to the lower grade ores that remain," Tony Juniper of Friends of the
Earth said on the sidelines of a UN climate change conference in
Bali.
The carbon cost at Rio Tinto's Ranger uranium mine Australia has also
risen.
The mine produced 17,7 tonnes of carbon dioxide equivalent per tonne
of uranium oxide in 2006, from 13 tonnes in 2005, a Rio Tinto
spokeswoman said.
She added that part of the rise was due to bad weather which
restricted access to high grade ore, as well as an expansion in
capacity, and the company was trying to reduce emissions again.
Uranium output at the mine was 4 748 tonnes last year, resulting in
around 84 000 tonnes of carbon dioxide.
Rio produced some 28,3 million tonnes of carbon across its business.
Despite these industry figures, Clarence Hardy, secretary of the
Australia Nuclear Association and president of the Pacific Nuclear
Council, says the environmental groups are wrong in their assumptions
and that nuclear power is relatively clean.
"Carbon dioxide emissions from the nuclear cycle are very low.
They are not zero, but they are low compared to fossil fuels and they
are even low compared to hydro," he said.
URGENT SOLUTIONS Over the life of a nuclear power plant, carbon
emissions are between 10 and 25 grams of C02 per kilowatt, as little
as one 100th of that of a coal-fired plant, Hardy added.
"Even wind and solar have higher C02 emissions than the entire
nuclear fuel cycle from mining through to waste management," Hardy
said, arguing that large volumes of steel and concrete - both energy-
intensive products - were required for those products.
But UK data paints a different picture.
A UK Parliamentary Office of Science and Technology document on
carbon emissions puts nuclear's footprint was around five grams of
CO2 per kilowatt, similar to the figure for offshore wind power at
5,25 grams and above onshore wind at 4,64 grams.
Scientists at the conference in Bali said the world needed urgent
solutions and emissions needed to peak within the next 10 to 15
years.
But building a nuclear reactor typically takes decades.
"Even if we started scaling up nuclear power tomorrow we couldn't do
that because it would take longer than that to get a serious impact
from new reactors," Juniper said.
"The real answer is more renewable, sustainable energy and greater
energy efficiency."
-----------------
How risky is the new era of nuclear power?
USA Today (AP) Dec 13 - The Salem, N.J., nuclear plant was shut down
for a time in the '90s. A government report says regulators were slow
to act on safety problems there.
Nearly two years ago, the Nuclear Regulatory Commission gave the
operator of the Indian Point nuclear plant a year to add backup power
supplies to the plant's emergency warning sirens. Entergy paid a
$130,000 government fine in April - but still hasn't done the work at
the plant 24 miles north of New York City.
At the Peach Bottom nuclear plant south of Harrisburg, Pa., security
guards often took 15-minute "power naps," according to a letter from
a former security manager to the NRC last March. The NRC began
investigating after CBS News aired video of the dozing guards in
early September.
Neither of the incidents amounted to an "immediate" safety risk, the
NRC says. But they - and hundreds of other seemingly minor episodes
at nuclear power plants in recent years - are drawing increased
scrutiny as the USA prepares to launch a new generation of nuclear
reactors.
NUCLEAR SAFETY PROBLEMS: A sampling since theThree Mile Island
accident
Power companies are beginning to file applications to build up to 32
nuclear plants over the next 20 years, the first since the 1979
accident at the Three Mile Island plant in Pennsylvania halted plans
for new reactors and led to sweeping changes in safety regulations.
It's partly a reflection of how, amid concerns about climate change,
communities have become more open to nuclear power as a cleaner
alternative to pollution-belching coal-fired plants.
FIND MORE STORIES IN: Nuclear Regulatory Commission | SALEM | Three
Mile Island | Nuclear Energy | David Lochbaum
Critics and advocates of nuclear power generally agree that
improvements in equipment and employee training have helped to make
nuclear plants safer since the partial meltdown of a reactor at Three
Mile Island.
Watchdog groups, however, say that unless nuclear safety and security
improve, the USA's expansion of its nuclear power industry - which
now involves 104 reactors that supply about 20% of the nation's
electricity - could pose risks to nearby communities.
"Serious safety problems" plague U.S. nuclear plants because the NRC
isn't adequately enforcing its standards and has cut back on
inspections, according to a report released Tuesday by the Union of
Concerned Scientists (UCS), a nuclear safety watchdog group.
The report also says that even though security at nuclear plants was
increased after the Sept. 11 terrorist attacks, reactors still aren't
sufficiently protected against terrorist threats such as hijacked
jets, and new reactors aren't being designed to be significantly
safer than existing ones. Increasing the number of reactors without
creating "unacceptably high safety and security risks" could be
difficult, the report concludes.
There has been no meltdown of a reactor in the USA since the incident
at Three Mile Island, which led to no deaths or identifiable injuries
from radiation exposure but resulted in the release of some radiation
from the plant.
However, since 1979, U.S. nuclear plants have had to shut down 46
times for a year or more, in most cases to fix equipment problems
that accumulated over time and that regulators should have ordered
repaired earlier, according to the UCS, which compiled the data from
the NRC and other research. And the number of equipment failings that
increase the risk of an accident is up since 2001, compared with the
previous five-year period, NRC figures show.
The UCS says incidents such as occasional failures of pumps that cool
the nuclear reactor core in an emergency eventually could prove
disastrous if they coincide with other low-probability events, such
as coolant leakages from the core.
"The track record on existing reactors leaves much to be desired, and
until you fix that problem, it's going to carry over to new
reactors," says David Lochbaum, director of UCS' nuclear safety
project.
The NRC and the Nuclear Energy Institute (NEI), the industry's trade
group, say just one incident since Three Mile Island - a water leak
at the Davis-Besse plant in Ohio in 2002 - has come close to
threatening communities near any plant.
The NRC says that in the episode involving the sleeping guards at
Peach Bottom, it didn't act sooner because it couldn't substantiate
the claims with Exelon (EXC), the plant's operator. At Indian Point,
Entergy (ETR) says its plan to install backup power for the sirens
has been delayed by technical hurdles and the need to get permits
from dozens of towns, counties and state offices.
A 'reliable fleet of reactors'
Nuclear reactors generate heat that produces electricity when uranium
atoms split. In the reactor core, uranium is kept in water to prevent
it from overheating, melting down and releasing radiation.
A meltdown by itself typically would not be disastrous because the
reactor sits in a concrete containment structure to prevent radiation
from escaping.
However, a meltdown could cause a buildup of temperature and pressure
that ruptures the containment building. A massive release of
radioactive gas into a surrounding community could destroy or damage
human cells and cause death or cancer.
That's what happened at the Chernobyl nuclear plant in the former
Soviet Union in 1986. The world's worst nuclear plant disaster
involved a meltdown and an explosion that killed 56 people. At least
an additional 4,000 are projected to die from cancer because of
exposure to radiation.
In the accident at Three Mile Island seven years earlier, water
cooling the core in one of the plant's two reactors leaked through a
partly open valve. The valve was closed enough to prevent an alarm
from sounding. Half the core melted, but the containment building
stopped all but a small amount of radiation from seeping into the
environment.
The incident led the U.S. government to require upgrades in piping,
valves and other equipment at all nuclear plants, and NRC inspections
were increased.
Today, "The U.S. operates not only the biggest but probably the
safest and most reliable fleet of reactors," says NEI Senior Vice
President Marvin Fertel.
UCS' Lochbaum counters that the 46 reactor shutdowns during the past
three decades indicate there has been a buildup of multiple problems
that regulators should have caught sooner.
In 1995, for example, Public Service Electric & Gas had to close its
Salem plant in New Jersey for three years until 43 equipment problems
were fixed, including a broken fan that kept safety gear from
overheating.
A Government Accountability Office report said the NRC knew about 38
of the flaws - in two cases for more than six years - and that its
"lack of more aggressive action" compounded the plant's problems.
Plants inspected less frequently
In the most serious episode involving a U.S. nuclear plant since
Three Mile Island, the Davis-Besse plant in Ohio was shut down from
2002 to 2004 after the NRC failed to spot what it acknowledges were
early signs of trouble.
An acid leak through the reactor vessel's lid left a quarter-inch-
thick steel veneer, according to NRC reports. Because emergency pumps
also were faulty, core-cooling water leaking through the ruptured lid
could have led to a meltdown.
The NRC identified the leak in fall 2001 but let the plant keep
operating. An NRC Inspector General's report in 2002 found the
agency's willingness to keep the plant running "was driven in large
part by a desire to lessen the financial impact on (plant operator
FirstEnergy) that would result from an early shutdown."
In a statement last month, the NRC blamed FirstEnergy (FE) for
providing "inaccurate and misleading information," including its
"explanation of the leak."
FirstEnergy says it has made extensive staffing and procedural
changes to prevent such situations in the future.
Stuart Richards, deputy director of the NRC's inspection unit, says
such shutdowns show "that if the NRC feels plants shouldn't be
operating, we'll take appropriate actions."
Richards notes that Davis-Besse was the last plant to be shuttered
for at least a year and that similar safety problems have decreased.
Plants were shut down an average of 1.5% of the time because of
safety lapses in 2006, down from 10% in 1997, NRC figures show.
NRC credits a more precise oversight system, launched in 2000, that
increases inspections at poorly performing plants. However, one key
safety measure - of problems that the NRC says increase the annual
risk of a meltdown from an average of 1 in 17,000 to up to 1 in 1,000
- has doubled the past six years to an average of 18 a year.
There have been 337 such "precursors" since 1988, including failures
of pumps that supply water to reactors in a crisis, the NRC says.
Each plant's emergency cooling system typically has several backups,
such as pumps or power generators.
NRC spokesman Scott Burnell says the increase in such problems is
insignificant because 22 of the incidents stemmed from two causes the
agency was aware of, rather than a rash of separate problems.
Half the problems stemmed from the loss of power - needed to run
critical cooling systems - and most of those occurred during the
massive electricity blackout that struck the northeastern USA on Aug.
14, 2003. The other half involved cracks in nozzles that, in some
cases, let water seep from a reactor.
Lochbaum says that such explanations by the NRC do not ease his
concerns about plants' safety. He blames the increasing "precursors"
on scaled-back inspections by the NRC and plant owners.
>From 1993 to 2000, routine NRC inspection hours declined by 20%,
partly because of budget constraints, the NRC acknowledges.
Although the hours spent inspecting plants rose 11% from 2001 to
2005, most of the increase stemmed from more attention to post-9/11
security checks, rather than the operation of the plants.
NRC and industry officials acknowledge they're inspecting many parts
of nuclear plants less frequently since 2000. But they say
inspections are more effective because they now focus on critical
gear whose failure poses the greatest risk to the public.
Questions about standards
In its report, the UCS says the NRC has not consistently enforced
many of its safety regulations for nuclear plants.
The group says that since 1981, for example, the NRC has issued about
1,000 exemptions to plants that failed to meet fire-protection rules
that went into effect after a 1975 blaze at the Browns Ferry plant in
Alabama.
The NRC says the waivers were granted to older plants that couldn't
make certain structural changes such as separating primary and backup
safety gear. Waivers permit alternative fire-prevention methods, such
as sprinklers or smoke alarms.
NRC Commissioner Gregory Jaczko says the agency should require plants
to take more elaborate steps, such as installing fire-resistant power
cables as backups to standard sets.
In February 2000, a steam generator tube at the Indian Point plant
ruptured, causing a small radiation leak outside the plant. Workers
had spotted corrosion in the tube in 1997, but Con Edison, the
plant's operator, persuaded the NRC to delay a follow-up inspection
slated for June 1999.
An NRC engineer was skeptical of the request, but agency policy
discouraged her from asking follow-up questions, an NRC Inspector
General's report found later. The tube broke before the next
scheduled inspection in 2000.
The NRC says the inspection was delayed because the plant had been
shut down for 10 months before the request, leaving little time for
the tube to degrade further.
The UCS' Lochbaum largely blames enforcement lapses on an NRC culture
he says discourages workers from raising safety issues out of fear of
retaliation. A 2002 Inspector General's survey said only 53% of NRC
employees "feel it's safe to speak up" at the agency.
The NRC's Richards says, "We emphasize safety as being important and
... that people should raise concerns."
To bolster enforcement, the UCS report urges Congress to require the
NRC to recruit managers from outside its ranks to transform the
agency's culture.
Another proposal, in a bill by Sen. Bernie Sanders, I-Vt., would
allow states to seek an independent safety assessment of a nuclear
plant when it seeks a license extension or an increase in power
output, or has repeated safety problems.
The UCS also criticizes the NRC for not requiring new reactors to be
significantly safer than current ones.
Under a tentative ruling by the agency, new reactors wouldn't have to
include features such as double-walled containment structures to
withstand aircraft attacks. The NRC this year similarly decided
against a proposal to force existing reactors to install giant mesh
shields to deflect air attacks.
NRC Deputy Director Gary Holahan says nuclear plants already are "one
of the most robust, safest facilities ... against air attacks."
Developers of more than half the 32 planned reactors have chosen two
models that use "passive safety" systems. If the core overheats, they
rely mostly on a gravity-driven release of water to cool it, rather
than on motorized pumps like those in existing reactors. The new
systems cut costs and avoid potential breakdowns if power is lost,
making them safer than current models, say the NRC and manufacturers
Westinghouse and General Electric.
But UCS scientist Edwin Lyman says the new designs' reduced reliance
on backup pumps is a concern because their performance in a crisis is
less certain. "They're shaving safety margins," he says.
Another point of contention: The NRC plans to have about 30% of its
inspections of new reactors done by private contractors as it tries
to streamline licensing reviews. Lochbaum worries that safety will be
sacrificed in a rush to issue licenses quickly. Many engineers who
designed the reactors will be responsible for reviewing them, he
says.
But NRC's Holahan says the contractors will simply be providing
technical information. "We make the final decisions about whether
something is safe," he says.
--------------------
Nuclear shutdown causing political meltdown in Ottawa
OTTAWA (CanWest News Service; Ottawa Citizen) Dec 13 - On a day when
Parliament passed a bill to restart the Chalk River nuclear reactor,
the Harper government came under fire for allowing the reactor to
shut down in the first place, causing a global shortage of medical
isotopes used to diagnose cancer.
Wednesday night, the Senate passed an emergency bill that would
restart the reactor for 120 days so that its operator, Atomic Energy
of Canada Ltd. (AECL), can resume producing supplies of the highly
sought isotopes.
Earlier this week, the Liberal Opposition had questioned the
government's decision to override the recommendations of the Canadian
Nuclear Safety Commission, which has warned of "serious concerns"
about the reactor's safety.
But having thrown their support behind the emergency bill with the
other parties, the Liberals changed tack Wednesday and attacked the
government for not acting quickly enough to head off the isotope
shortage.
"We have a 50-year-old facility in Chalk River, no functioning backup
reactor and no guarantee that we will not run out of medical isotopes
again. When will the government get our nuclear house in order?"
The Nuclear Safety Commission first raised concerns about the
reactor's safety in spring 2006, when the facility's licence came up
for renewal. The nuclear watchdog granted a new licence to AECL in
August last year, on the understanding that AECL would complete seven
safety upgrades.
But on Nov. 19, commission inspectors discovered that one of the
upgrades - the connection of two cooling pumps to a backup power
supply - had not been carried out as promised.
AECL shut down the reactor on Nov. 18 for a planned maintenance
check, but announced on Dec. 4 that it would extend the shutdown to
complete the safety upgrade. Natural Resources Minister Gary Lunn and
Health Minister Tony Clement revealed this week that they learned of
the extended shutdown on Dec. 4 and 5, respectively.
The opposition on Wednesday blasted AECL for not reporting the
reactor's safety deficiencies earlier. The Liberals demanded that the
Auditor General probe the affair, while Green Party leader Elizabeth
May called for a public inquiry into AECL's "lack of accountability."
Some nuclear safety experts, for their part, scoffed at reports of a
possible nuclear accident on the same scale of the Three Mile Island
incident in the late 1970s. The risk of a nuclear meltdown of that
scale is relatively small because the equipment in question would
likely only be used in the event of a natural disaster such as
earthquake, said John Luxat, Industrial Research Chair in Nuclear
Safety Analysis at McMaster University.
"In this case what I believe they have done is taken a fairly
intransigent position and forced a shutdown, but they don't seem to
have taken into consideration the direct consequence of their action,
which is to impose an immediate hazard on large numbers of people in
Canada and around the world."
Harper defended the decision to intervene, and promised that the
government will review the matter.
"I can certainly assure the House that when this is all behind us the
government will carefully examine the role of all actors in this
incident and make sure that accountability is appropriately
restored."
Clement, the health minister, conceded that his department has no
emergency plans in place for an unscheduled shutdown of the isotope
reactor. "It took a little bit of paper clips and chewing gum and
scotch tape to triage the system in the short term," he told
reporters.
But he said the situation was exacerbated by AECL's slowness in
notifying Health Canada of the shutdown. "It's shocking quite
frankly," said Clement. "Clearly if there is an issue of extended
shutdown in the future, Health Canada has to be notified
immediately."
------------------
Russia and Iran agree nuclear power station timetable
MOSCOW (Reuters) - Russia and Iran have settled all differences over
the construction of the Bushehr nuclear power station and agreed on a
timetable for its completion, the Russian contractor building the
station said on Thursday.
Russia's role in building Bushehr, Iran's first nuclear power
station, is a key element in a diplomatic dispute over Iran's nuclear
ambitions.
"We have resolved all the problems with the Iranians," said Sergei
Shmatko, president of state controlled Atomstroiexport, which is
building the Bushehr plant on the Gulf.
"We have agreed with our Iranian colleagues a timeframe for
completing the plant and we will make an announcement at the end of
December," Shmatko told reporters.
The United States, leading European Union nations and Israel say they
suspect Iran wants to develop a nuclear weapon and have pressed
Moscow to drop the Bushehr project.
But Russia says there is no evidence that Tehran is seeking nuclear
weapons and that the uranium Moscow intends to ship to Bushehr is too
weak to develop a nuclear bomb. Tehran says its nuclear program is
aimed only at generating electricity.
Russia, using Bushehr as a lever in relations with Tehran, has
repeatedly put back the start-up date, citing Iranian delays in
making payments of millions of dollars. Iran always said it was up to
date with payments. Shmatko said those problems were all resolved,
but did not give details.
NUCLEAR FUEL FOR IRAN?
According to Russian forecasts, the first reactor at the Bushehr
plant could be started up in 2008 and nuclear fuel would have to be
shipped to Bushehr six months ahead of time.
"We absolutely, definitely intend to build the Bushehr atomic power
station and intend definitely to deliver the fuel to the plant," said
Shmatko, who said that Russia and Iran may form a joint venture to
run the plant. He did not say when the fuel would be delivered.
Russian officials said the International Atomic Energy Agency, which
sealed the fuel last month, confirmed the Bushehr fuel is Uranium-235
enriched to less than 5 percent.
President Vladimir Putin visited Tehran in October, prompting
speculation that the Kremlin wanted to play a bigger role in the
diplomacy around Iran's nuclear program.
Iranian Foreign Minister Manouchehr Mottaki and the head of Russia's
atomic energy agency, Sergei Kiriyenko, held talks in Moscow on
Thursday. Mottaki proposed forming a joint gas company with Russia,
RIA news agency reported.
Mottaki also attended a session of a bilateral commission on trade
and economic cooperation and met his Russian counterpart Sergei
Lavrov.
"We are of course sincerely interested in solving the problems around
the Iran nuclear dossier as soon as possible," Lavrov said in opening
remarks at their meeting.
"This is possible only on the basis of the Non-Proliferation Treaty,
the principles of the International Atomic Energy Agency and on the
principle that Iran has the right to develop peaceful nuclear
energy."
"We note progress in relations between the IAEA and Iran and
encourage further progress to ... remove all remaining questions and
restore international confidence in Iran."
------------------
Japan Nuclear Energy Drive Compromised by Conflicts of Interest
Dec. 13 (Bloomberg) -- On March 25, Hokuriku Electric Power Co.'s
nuclear generating station in Shika, Japan, was rocked by an
earthquake that wasn't supposed to happen.
Nine years earlier, Yoshihiro Kinugasa, the leading seismologist on
Japan's nuclear licensing panel, signed off on a pre-construction
study of the site. The report identified three fault lines, each less
than 10 kilometers (6.2 miles) long, or just under the length
regulators deemed threatening.
In 2005, Kinugasa switched roles and published a study with Hokuriku
Electric engineers that rebutted neighbors' claims the plant was
unsafe. After the quake, government scientists found the fissures
were in fact a single fault of 18 kilometers that could produce more
shaking than the plant was built to withstand.
A Tokyo Institute of Technology professor, Kinugasa has advised
utilities, inspected plant sites and helped rewrite nuclear safety
rules. His multiple roles show the conflicts of interest endemic in
Japan's nuclear power industry, says Takashi Nakata, a Hiroshima
Institute of Technology seismologist.
``The same people are making the rules, doing the surveys and signing
off on the inspections,'' says Nakata, who sits on the science
ministry's earthquake survey committee. ``The regulators just rubber-
stamp the utilities' reports.''
Power company advisers dominated a panel responsible for rewriting
Japan's nuclear safety rules, says Katsuhiko Ishibashi, a seismology
professor at Kobe University who last year quit the body, saying the
review process was rigged and ``unscientific.''
`Fundamental Improvements' Needed
Kinugasa and the regulators say they are independent.
``It's my job to give advice,'' Kinugasa says. ``I don't make
decisions on safety. That's the regulators' job.''
Kinugasa, 63, has advised Japan's Nuclear and Industrial Safety
Agency on every nuclear power plant permit since 1985, says Tomoyuki
Tajiri, a spokesman for the agency.
Concerns about conflicts of interest were underscored July 16, when a
6.8-magnitude earthquake damaged the world's biggest nuclear power
plant, run by Tokyo Electric Power Co., causing radiation leaks into
the air and sea.
``If we don't make fundamental improvements in the engineering
standards for nuclear power plants, Japan could suffer a catastrophic
nuclear-earthquake disaster,'' Ishibashi says.
Japan imports virtually all of its oil and natural gas, so it is
counting on nuclear energy to help meet increasing demand for
electricity while cutting emissions of the greenhouse gases blamed
for global warming. Japan's 55 nuclear reactors already generate more
power than any nation other than the U.S. and France, and the country
plans to boost its reliance on atomic energy to 40 percent of
generation from 30 percent by 2030.
Faked Safety Records
Criticism of Japan's atomic industry stretches back to at least 1999,
when two workers died from radiation poisoning after managers at a
nuclear-fuel plant run by a unit of Sumitomo Metal Mining Co. allowed
them to mix a uranium solution in steel buckets instead of government-
prescribed safety vessels.
In 2002, whistleblowers revealed abuses that forced Tokyo Electric to
say it had faked reports on repairs since the 1980s. The company's
chairman and president resigned and all 17 of its reactors were shut
by government inspectors.
Two years later, superheated steam from a burst pipe killed five
workers at a Kansai Electric Power Co. nuclear plant. The pipe hadn't
been inspected for 28 years, the Nuclear and Industrial Safety Agency
reported.
To head off opposition to new reactors, the agency, known as NISA,
demanded that power companies reveal any unreported safety breaches
by the end of March 2007. In response, seven of Japan's 12 public
utilities said they had falsified records for 30 years.
``If it were up to me, I'd add some intrusiveness to Japan's
regulatory process,'' says Ken Brockman, a former director of nuclear
installation safety at the International Atomic Energy Agency in
Vienna and now a consultant at Talisman International LLC. ``The
circumstances there raise question after question.''
Matter of Trust
The weakness of Japan's nuclear regulators is that they only step in
when they see trouble, says Brockman, who also worked at the U.S.
Nuclear Regulatory Commission.
``In Japan, they intervene when they have a reason not to trust
anymore,'' he says. ``In the U.S. system, trust has to be continually
verified.''
Responsibility for keeping Japan's reactors safe rests with the
Ministry of Economy, Trade and Industry, which also oversees the
effort to increase nuclear power generation. By contrast, France and
the U.S. have independent regulatory agencies.
``We have built objectivity, fairness and neutrality into examining
nuclear plant safety,'' says Akira Fukushima, deputy director-general
for safety examination at NISA, an arm of the ministry. ``Separating
our agency from the Trade Ministry isn't the issue.''
Regulatory Independence
The U.S. Nuclear Regulatory Commission was set up in 1975 as an
independent agency. Until the commission was created, the Department
of Energy both regulated and promoted nuclear power. France last year
made its Nuclear Safety Authority autonomous.
``If you want to be a legitimate, credible and authoritative
regulator then you need to be independent,'' says Mathias Lelievre,
head of the agency's Paris division.
Japan mitigates conflicts of interest by having the Nuclear Safety
Commission, which reports to the prime minister's office, review all
plant applications approved by NISA, Fukushima says.
``Human errors can occur anytime to anybody,'' he says. ``That's why
we double-check.''
The 1995 Kobe earthquake that killed more than 5,000 people focused
Japan's attention on construction standards. In response, the prime
minister's office appointed a panel of experts to strengthen the
earthquake safety guidelines on which building codes for nuclear
plants are based.
Outcome `Predetermined'
The problem was that a majority of the members also sat on committees
of the Japan Electric Association, the main lobby group for power
companies, says Ishibashi, the seismologist who quit the panel.
Eleven of the 19 members served on association committees, says
spokesman Yoshiyasu Araki.
The panel approved guidelines eliminating a requirement that all
plants be built to withstand a 6.5-magnitude earthquake, reflecting
demands made by the Electric Association in April 2005, Ishibashi
says. Under the new rules, adopted in September 2006, plant safety
will be judged on a case-by-case basis.
``We went around and around for five years, but the outcome was
predetermined,'' Ishibashi says. ``The Japan Electric Association got
its way.''
Araki says the change was necessary to accommodate evolving
earthquake science. He defends the number of utility representatives
on the safety panel.
``The regulations have to be made by the people who use them,'' he
says. ``Nobody else has the expertise.''
`Same Pool of Fish'
Another former panel participant says Electric Association members
have limited sway over nuclear policy, and their main task is to
translate safety guidelines into building codes.
``That's a very low-level role,'' says Shunsuke Kondo, who is also
chairman of the Atomic Energy Commission of Japan, a government
research body that advises on nuclear energy policy.
Japan isn't unique in drawing nuclear regulators from a small group
of experts, says John Large, a U.K.-based consultant who has advised
Greenpeace on nuclear safety issues in Japan.
``Virtually every regulator in the world has a cozy relationship with
the nuclear industry,'' Large says. ``This is a very incestuous
industry where the regulator and the operator and the manufacturer
are all drawn from the same pool of fish.''
While Japan has never suffered a failure comparable to the 1986
meltdown at Chernobyl in the former Soviet Union or the 1979 partial
reactor failure at Three Mile Island in the U.S., the nuclear
consequences of a massive quake in Tokyo could be devastating.
Tokyo Threat
Chubu Electric Power Co.'s Hamaoka nuclear plant stands on the Tokai
fault that runs near Tokyo, Japan's capital, where more than a
quarter of the country's 128 million people live.
Minoru Konagaya, co-author of the 2006 book ``The Capital That Was
Erased by Radiation,'' used a model of the Chernobyl accident to show
that meltdowns at Hamaoka's five reactors could kill as many as 8
million people and bring the world's second- largest economy to a
standstill.
``Within eight hours Japan's strong westerly winds would carry a
radiation cloud over Tokyo,'' says Konagaya, 36, a civil engineer who
was part of a parliamentary delegation that investigated a failure of
Hamaoka's emergency cooling system in 2001.
At the time, Konagaya was an aide to a lawmaker representing the
prefecture where the plant is located. His concerns were sparked by
plant managers' responses to the parliamentary group.
``They started with the premise that an accident couldn't happen,''
Konagaya says. ``For every one question, they had 10 answers. All
they would say was that it was 100 percent safe.''
Worst-Case Scenario
Ishibashi says Konagaya's conclusions are a possible worst- case
scenario.
``If a disastrous earthquake took place in the manner described in
the book, it's not implausible that millions of people may lose their
lives,'' he says.
Chubu Electric isn't aware of Konagaya's conclusions, says spokesman
Noriyuki Narugami.
``We have made certain that the plant's earthquake engineering is
safe,'' he says.
The damage an earthquake can wreak on a nuclear plant was shown in
July at Tokyo Electric's Kashiwazaki Kariwa power station in Niigata
prefecture.
Kazuyuki Takemoto, a former Kashiwazaki city councilman and longtime
anti-nuclear activist, was working at home when the quake hit around
10 a.m. When he ran outside, Takemoto saw a neighbor climb from the
ruins of his home.
Nuclear Leak
``The thing we had been warning against for 33 years had happened,''
says Takemoto, 57, whose house is 3 kilometers from the power
station's seven reactors. ``All of our houses had collapsed, but we
were more worried about the plant.''
At the facility, workers were struggling to contain a blaze in a
transformer. Service roads buckled because of shaking that was as
much as three times greater than the facility was built to withstand,
Tokyo Electric reported.
Contaminated water from a cooling pool had sloshed into the sea
through drains, because sealing plugs hadn't been installed. The
radiation released was within authorized limits for public health and
environmental safety, the IAEA said Aug. 17.
After the quake, Trade Minister Akira Amari said regulators hadn't
properly reviewed Tokyo Electric's geological survey when they
approved the site in 1974.
That report underestimated the length of the nearby fault and hence
the earthquake risk, Amari said. Kinugasa sat on the licensing
committees for four of the plant's reactors.
On Dec. 7, Tokyo Electric, Japan's biggest power company, said it
knew from a 2003 study that an undersea fault near Kashiwazaki Kariwa
could cause a magnitude 7 earthquake.
Kinugasa Controversy
Kinugasa's role in the nuclear power industry has been controversial
for almost 20 years.
In 1988, when he was a science ministry geologist, advice Kinugasa
gave to managers at a fuel-processing plant resulted in his boss
being reprimanded by parliament. Prior to a licensing inspection at
the facility run by Japan Nuclear Fuel Service Ltd., Kinugasa advised
that the word ``active'' be deleted from a description of the fault
running under the site, a company document shows.
``I didn't do anything wrong and that's why I wasn't punished,''
Kinugasa says.
A decade later, Kinugasa was on the regulatory committee that
approved a second reactor at Hokuriku Electric's Shika plant after
the nearby faults were estimated at less than 10 kilometers long.
`Money Before Safety'
At the time, 10 kilometers was a magic number for Japan's nuclear
planners because the safety code deemed that a fault of that length
could produce a quake of about 6.5-magnitude -- the minimum all
Japanese reactors were required to withstand. A longer fault would
have demanded that a reactor be built to more stringent, and
expensive, specifications.
``Kinugasa was virtually the main expert specializing in fault-line
study on the NISA licensing committee,'' says Haruo Yamazaki, a Tokyo
Metropolitan University professor who once sat on the nuclear safety
commission panel that reviewed license approvals by the frontline
regulator. ``Ten years ago there were very few fault-line
specialists.''
Many citizens in Shika, 600 kilometers northwest of Tokyo, weren't
convinced. In 1999 they filed a lawsuit to close the plant's second
reactor.
``We didn't trust the utility's claim that the faults were
separate,'' says Tetsuya Tanaka, 64, a representative of the 135
plaintiffs. ``They were putting money before safety.''
`These Guys Are Fools'
With the case dragging on, Kinugasa and three Hokuriku Electric
engineers wrote their 2005 paper reproducing the findings of the
company's 1998 license application. The report ignored an
administrative convention used by government geologists that said
small faults within five kilometers of each other should be
considered a single fissure.
Kinugasa says he didn't apply the five-kilometer rule because he used
more sophisticated analysis and ``higher criteria.''
The paper didn't help Hokuriku Electric. In March 2006, the court
ordered the company to shut down its second reactor, citing
``inadequacy'' in seismic design. While an appeal to the Nagoya High
Court kept the plant running, it was closed four months later after
cracks were found in its turbines.
This March, the area was hit by a 6.9-magnitude earthquake. The power
plant suffered minor damage, according to Trade Ministry reports.
After the quake, the Geological Survey of Japan investigated the
ocean floor and found an active fault more than 18 kilometers long.
``Either Kinugasa's incompetent or he did it on purpose,'' says
Nakata, the Hiroshima Institute of Technology seismologist. ``I think
he did it intentionally, trying to match the finding to the magic
number.''
Kinugasa rejects that allegation.
``There is no conclusive evidence that the faults are longer than I
have said,'' he says. ``There's a group of idiots who are saying that
I'm deliberately shortening the length of fault lines. These guys are
fools.''
-------------------
Report: Total Chief Wants to Become a Nuclear Power Supplier
PARIS (AP) -- Total SA Chief Executive Christophe de Margerie said he
expects the oil company to expand its activities and start supplying
nuclear power.
In an interview published Wednesday in French business daily Les
Echos, he said "in 20 years I don't see how we could be absent in the
fields of nuclear power and clean fuel."
Such a move requires long preparation and is "not for tomorrow," he
said. Total is not interested in acquiring a stake in French nuclear
engineering company Areva SA, he told the newspaper.
France relies on nuclear for most of its electricity and already
hosts two state-owned nuclear champions: Areva and Electricite de
France SA, whose nuclear activities account for 71.2 percent of its
generation.
Asked about petrol prices, de Margerie told the newspaper at $90 per
barrel oil is "not too expensive" -- costing less than mineral water.
Prices are unlikely to fall much because "structurally we are
entering in a system of high prices," he said.
-----------------------------------------
Sander C. Perle
President
Global Dosimetry Solutions, Inc.
2652 McGaw Avenue
Irvine, CA 92614
Tel: (949) 296-2306 / (888) 437-1714 Extension 2306
Fax:(949) 296-1144
E-Mail: sperle at dosimetry.com
E-Mail: sandyfl at cox.net
Global Dosimetry: http://www.dosimetry.com/
Mirion Technologies: http://www.mirion.com/
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