MANAGEMENT OF DISUSED SEALED RADIOACTIVE SOURCES (DSRS) COLLECTED FROM PUNJAB, NWFP AND CAPITAL TERRITORY OF PAKISTAN

F. Jan, A. Wahid, E. U. Haq, S. S. Ahmad, M. Aslam, M. Hussain

Abstract


Disused Sealed Radiation Sources (DSRSs) pose radiological threat and concern globally to both public and the environment. The sources may get mislaid or lost if not properly managed due to their small physical size and therefore, need to be managed with an adequate nuclear waste management infrastructure and legal framework. Management of such moieties from upper half of the country has been entrusted to Radioactive Waste Management Group of Health Physics Division at Pakistan Institute of Nuclear Science and Technology, Islamabad. Various types of DSRSs having a total activity of 91360 GBq have been collected from various end users such as nuclear medical centres and industries in the eastern and north-western parts of Pakistan. A conditioning procedure has been optimized and a few sources have been conditioned which are being studied. The procedure has yet to be approved from the regulatory authority. The results are promising. Satisfactory management parameters, reduced radiation risks and improved security of the sources have shown the viability of the procedure. The possibility of using DSRS as a radiological dispersal device, risk of improper handling, or loss of control, etc. has been reduced considerably and control over the spent SRS is facilitated. This paper briefly describes management parameters like legal infrastructure and control, collection, conditioning and on-site interim storage, radiation safety and contamination control, quality assurance, documentation and inventory of DSRS in the country.

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References


V. Ciani, Radiation sources in the EU – A review of steps in the European Union. IAEA Bulletin, 41, No.3 (1999).

J. Piechowski, S. Kaiser and V. Ciani, European Union Legislation on Control of Sealed Sources, IAEA-CN-84/68 (2001.

V. Friedrich and F. Gera, Safe management of disused radioactive sources: lowering the risk. IAEA Bulletin, 42, No.3 (2000).

International Atomic Energy Agency, The Radiological accident in Goiania, SU/PUB/815, IAEA, Vienna (1988).

International Atomic Energy Agency, Radiation Safety and Security, IAEA Bulletin, 41, No.3 (1999).

International Atomic Energy Agency, Safety of radioactive waste management-Technical session 6, Proceedings of an International Conference, Cordoba, Spain (2000).

International Atomic Energy Agency, IAEA TECDOC-620, Nature and magnitude of the problem of spent radiation sources, IAEA-TECDOC-620, Vienna (1991).

International Atomic Energy Agency, International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources, Safety Series No. 115, IAEA, Vienna (1996).

Pakistan Nuclear Regulatory Authority (PNRA) Regulations on Radiation Protection, Pakistan Nuclear Regulatory Authority, Ordinance (PAK/904), PNRA, Islamabad (1999).

International Atomic Energy Agency, Treatment and Conditioning of Radioactive Solid Wastes, IAEA-TECDOC-655, Vienna (1992).

International Atomic Energy Agency, Establishing a National System for Radioactive Waste Management, Safety Standard No. 111-S-1, IAEA, Vienna (1996).

International Atomic Energy Agency, Regulatory Control of Radiation Sources, Safety Standards No. GS-G-1.5, IAEA, Vienna (2004).

International Atomic Energy Agency, Strengthening control over radioactive sources in authorized use and regaining control over orphan sources-National strategies, IAEA-TECDOC-1388, IAEA, Vienna (2004).

International Atomic Energy Agency, Organization and Implementation of a National Infrastructure Governing Protection against Ionizing Radiation and the Safety of Radiation Sources, IAEA TECDOC-1067, IAEA, Vienna (1999).

International Atomic Energy Agency, Regulations for the Safe Transport of Radioactive Material, Safety Standard Series No.ST-1, IAEA, Vienna (1996).

International Atomic Energy Agency, Handling, Conditioning and Storage of Spent Radioactive Sources, IAEA-TECDOC-1145, Vienna (2000).

F. Jan, A. Wahid, M. Aslam and S.D. Orfi, Radiation protection aspects of shallow land disposal of low and intermediate level liquid and solid radioactive waste at PINSTECH, Health Physics-Operational Radiation Safety, S85 – S90, Vol. 89 (5), November (2005).


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