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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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