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Conditioning of 60Co spent sealed sources

Published online by Cambridge University Press:  14 September 2006

M. A. Hasan ,
Y. T. Selim  and
Y. F. Lasheen
M. A. Hasan
Affiliation:
Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Abu Zabul, Egypt
Y. T. Selim
Affiliation:
Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Abu Zabul, Egypt
Y. F. Lasheen
Affiliation:
Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Abu Zabul, Egypt
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Abstract

As part of their functions, the Hot Laboratories Center, EAEA, are responsible for conditioning of different spent sealed sources which received from different end users. Regarding to the inventory of spent sealed sources in Egypt, thirty eight 60Co spent sealed sources with low radioactivity levels are needed to be conditioned according to IAEA guidelines. The method of conditioning of 60Co spent sealed sources can be achieved using 200 l drum with special lead shield and concrete as matrix material. The surface dose rate calculation reveals that when lead shield of 6.5 cm thickness (density 11.35 gm/ml), concrete shield at least 18 cm thickness (density 2.35 gm/cm3) and 200 l drum thickness is 0.14 cm, (density 7.86 gm/cm3), the surface dose rate is 0.86 mSv/ h. The data are complied with the regulation of IAEA safety standard (surface dose rate doses not exceed than 2.0 mSv/ h).

Keywords

Conditioning60Cospentsealedsources
Type
Research Article
Information
Radioprotection , Volume 41 , Issue 3 , July 2006 , pp. 345 - 355
Copyright
© EDP Sciences, 2006

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References

IAEA (1991) Nature and Magnitude of the problem of spent radiation sources, IAEA-TECDOC-620, Vienna, Austria.
IAEA (1995) The Safe Use of Radiation Sources, Training Course Series No. 6, p. 302, Vienna, Austria.
IAEA (1996) International Basic Safety Standards for Protection Against Ionizing Radiation and for Safety of Radiation Sources, Safety Series No. 115, Vienna, Austria.
IAEA (2000a) Regulations for safe transport of Radioactive Material, Safety Standards Series No. TS-1 (ST-1, Revised), Vienna, Austria.
IAEA (2000b) Handling, Conditioning and Storage of Spent Sealed Radioactive Sources, IAEA-TECDOC-1145, Vienna, Austria.