Re: 200 mSv, excessive radiation of worker in Gremikha?

["yuan-chi luan" <nbcsoc@hotmail.com>]

Dear Dr. Jerry Cuttler,



It is good of you to bring the massage of the Rassian nuclera worker 

received 200 mSv acute exposure radiation in Gremikha, and  commented that 

200 mSv excessive dose should be quite stimulating.



A nuclear energy worker received a dose of 200 mSv or 20 rad is usually a 

serious thing to  a nuclear facility and would frighten the workers and 

public, yet no effects could be oberved in the irradiatied worker, though 

his dose might be 10 times over the legel dose limit. As most workers might  

have about 25% probablity died in spontaneous cancers in whole life. If 

radiation could increase cancer mortality as LNT asserted,the excessive 200 

mSv dose could only increase a small %, how could people  decide whether  it 

is attributed  to radiation. while you commented that 200 mSv might 

stimulate health (reduction of cancers), it possibly be true. It has been 

observed by many investigation projects in the Chernobyl accident, such as 

the 200,000 emergancy recovery or clean-up workers did not have excess 

leukemia deaths from  the average excess of 100 mSv radiation received, on 

the contrary, the spontaneosu cancer deaths of the workers were conceivably 

reduced, only they considered this might be because of  the worker healthy 

effects and better medical care. The highly irradiated fire fighters and 

workers in the Chernobyl reactor hall, might also provide  some valuable 

inforamtion of health effects of acute exposure of radiation. 28 of  them 

died in short timoe, more than 100 survivors still received quite high 

doses. any more leukemia deathss induced? The international radiation 

protection communities should further study of the health effects of 

radaition in the Chernobyl accident!



Best regards,



Y. C. Luan



---------------- original message ----------------------------

>From: "Jerry Cuttler" <jerrycuttler@rogers.com>

>Reply-To: "Jerry Cuttler" <jerrycuttler@rogers.com>

>To: "RAD-SCI-L" <rad-sci-l@WPI.EDU>

>Subject: 200 mSv, excessive radiation of worker in Gremikha?

>Date: Sat, 27 Sep 2003 12:25:52 -0400

>

>20 rad should be quite stimulating!

>------------------------------------------------------------------------

>

>http://www.interfax.ru/e/B/0/28.html?menu=1&id_issue=5660673

>

>Sep 26 2003 5:43PM

>Biophysics Institute confirms excessive radiation of worker in Gremikha

>

>ST. PETERSBURG/MOSCOW. Sept 26 (Interfax-Northwest) - The Biophysics

>Institute in Moscow has confirmed that a worker from the SevRAO state

>company suffered a large dose of radiation during a cleanup operation at a

>storage facility for solid radioactive objects and spent nuclear fuel in 

>the

>community of Gremikha on the Kola Peninsula.

>

>"On August 28, the clinic of the Biophysics Institute in Moscow received a

>32-year-old patient suspected of having acute radiation sickness. The dose

>to which the man, a SevRAO staffer, was exposed to as the result of an

>incident in Gremikha was about 200 millisieverts (mSv)," a source with the

>institute told Interfax on Friday.

>

>The patient is in stable condition, the source said.

>

>The incident occurred on August 20 when workers were retrieving components

>of the control units from nuclear submarine reactors at an irregular dump.

>They put the components into temporary packages to be transported to a

>regular storage facility. At the end of the operation, they retrieved a rod

>radiating up to 4.4 Sv/h. Work was immediately stopped at that point.

>

>The Russian Ministry of Atomic Energy previously denied reports that the

>SevRAO workers were exposed to excessive doses of radiation. The ministry's

>press service reported on Wednesday that "the doses the SevRAO workers were

>exposed to during the operation were estimated from 6 to 29 mSv. No defects

>in the SevRAO personnel's health or signs of radiation sickness were 

>found,"

>it said in a press release.

>

>According to Russian Standards of Radiation Security, "the radiation of an

>effective dose of over 200 mSv within one year must be regarded as

>potentially dangerous." The standards allow for radiation among personnel

>working with radioactive materials "up to 20 mSv a year on average within

>any consecutive five years, but no more than 50 mSv a year."

>

>A total of 15 SevRAO workers were engaged in the operation in Gremikha at a

>former Northern Fleet base.

>

>Gremikha houses a Northern Fleet coastal storage facility for spent nuclear

>fuel and the largest settlement for decommissioned nuclear submarines,

>mostly of the first generation. [RU EUROPE ASIA EEU EMRG HEA ENV] va tj <>

>

>

>



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