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What do you mean by large?
The source in Goiania: CsCl - Activity 1375 Ci, Mass,
including matrix 93 g, volume about 31 cubic cm.
Source diameter 3.6 mm, h = 3.0 mm
Ir-192 source for industrial radiography:
metallic form, activity 120 Ci, size 3mm x 3mm, if 100 Ci,
size 3mm x 2.5mm
Shielding for Ir-192 equipment ready to be used
Nominal capacity of 120 curies, depleted uranium
shielding Device weight of 24Kgs., certified type B and very easy to
transport and to remove the source
Jose Julio Rozental
Israel
But a dirty
bomb requires a large source?
-- Source in
Goiania
But a dirty
bomb requires a large source that has to be acquired, then transported to the
place where it will be made into a bomb. Then there's the bomb fabrication
process, loading the bomb into the delivery vehicle and transport to the
destination.
----- Original Message -----
Sent: Thursday, February 27, 2003 7:50
PM
Subject: RE: Nova - Dirty Bombs - London
Scenario question
However, there is
another aspect to the suicide bomber scenario. Suicide attacks involve
the attacker either dying in his own explosion or in returned fire.
Either way, the attacker's death is immediate - no lingering, no
suffering.
But a dirty bomb
requires a large source that has to be acquired, then transported to the place
where it will be made into a bomb. Then there's the bomb fabrication
process, loading the bomb into the delivery vehicle and transport to the
destination. As this process evolves, a single case of acute radiation
sickness is likely to derail the whole thing. Suicide bombers who see
that radiation sickness is a relatively lengthy, truly ugly way to die will
likely have second thoughts - cooperation will become a problem, etc. Trying
to manage radiation exposure involving such a large source so that none of
this happens begins to confound the necessary efforts to do all this
inconspicuously.
Bob
Flood
Nevada Test
Site
-----Original
Message-----
From: John
Jacobus [mailto:crispy_bird@YAHOO.COM]
Sent: Thursday, February 27, 2003 8:32
AM
To: J. J. Rozental;
Stewart Farber; High Plains Drifter; Radsafe
Subject: Re: Nova - Dirty Bombs - London
Scenario question
If I may
suggest some other aspect.
1.
Consider that the ones who assemble the bomb are not those who deliver
it. Therefore the driver may not have symptoms of radiation sickness as
he is in the front and the source is near the rear doors.
2.
To assemble the bomb, the source capsule is cut using a high-speed circular
saw and the CsCl powered is dumped in a fragile (plastic bag) container that
will rupture easily. The assemble could take less than 15 minutes.
Come on
Stewart. I am sure that if you wanted to make a radiological bomb, you
could do it.
"J. J. Rozental"
<joseroze@netvision.net.il> wrote:
Stewart's comment:
The scenario NOVA
dramatized last night involved a whole lot more Cs-137, or
a source with
74,000 GBq of Cs-137 [2000 Ci] as I recall them mentioning.
For a point
source of Cs-137 this equates to about 6.6E6 R/hr at 1 cm. If
the
terrorists spent 1 hour at say 2 feet from this unshielded source [???
a
wag assumption] in fabricating the bomb and transporting it they
would
receive about 7,000 R whole body.
comment:
a) However
suppose terrorists instead 2 feet he keeps the source in a Van,
1.5 m
away - the dose drop to about 300 R/h
b) Terrorist do not care for
his life, today countries as Israel and USA
are forced to witness the
hair's breadth of difference between the ability
to prevent a terrorist
attack and the ability of the terrorists to blow
himself up and to be
succeeded in his mission.
Jose Julio Roz! en!
tal
joseroze@netvision.net.il
Israel
-- John
John Jacobus, MS
Certified
Health Physicist
e-mail: crispy_bird@yahoo.com
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