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Re: Dirty bombs
In Goiania, CsCl powder was dispersed easily and further distributed by
wind suspension and rainwater runoff. Contamination was found on 7 major
areas. In total 85 houses was found to have significant contamination,
included the Public Hygiene Control Unit, and 200 individuals were evacuated
from 41 of them. After two weeks 30 houses were free for reoccupation.
The ground water was found to be free of contamination, except for a few
wells near de main foci of contamination with concentrations of cesium just
above the detection level
Comment:
It should be emphasized that levels adopted in Goiania were extremely
restrictive and corresponded roughly to the lowest values of the
intervention levels recommended by ICRP and the IAEA (non-action levels) and
were extremely restrictive, owing to political and social levels - This
gives rise on what, during and emergency, people think about the danger of
radiation.
To go further on this topic, please GO TO:
*Rosenthal JJ, de Almeida CE, Mendonca AH. 1991. The radiological accident
in Goiania: The initial remedial actions. Health Phys 60(1):7-15.
*Amaral EC, Vianna ME, Godoy JM, et al. 1991. Distribution of Cs-137 soils
due to the Goiania accident and decisions for remedial action during the
recovery phase. Health Phys 60(1):91-98.
*Godoy JM, Guimaraes RJ. Pereira JC, et al. 1991. Cesium-137 in the Goiania
waterways during and after the radiological accident. Health Phys
60(1):99-103.
Jose Julio Rozental
joseroze@netvision.net.il
Israel
l
Cs gamma radiation, but the drinking water
supply was found to be clean,
IAEA. 1988. The radiological accident in Goiania. Vienna: International
Atomic Energy Agency.IAEA Publication No. STI/PUB/815. - PART III, The
environmental Contamination: Assessment and Remedial Action, pag 3/5
----- Original Message -----
From: "BERNARD L COHEN" <blc+@PITT.EDU>
To: "internet RADSAFE" <radsafe@list.vanderbilt.edu>
Sent: Thursday, February 27, 2003 5:05 PM
Subject: Dirty bombs
Can someone explain why dispersed CsCl in a city is a long term
hazard? Isn't it highly soluble in water? If so, it should be easy to hose
away, using radiation detectors to locate hot spots. The water with CsCl
would go into the sewer system. Even without hosing, rain should wash away
most of it.
Bernard L. Cohen
Physics Dept.
University of Pittsburgh
Pittsburgh, PA 15260
Tel: (412)624-9245
Fax: (412)624-9163
e-mail: blc@pitt.edu
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