RADIOACTIVE WASTE MANAGEMENT AT THE NUCLEAR SCIENTIFIC AND EXPERIMENTAL CENTRE OF THE INSTITUTE FOR NUCLEAR RESEARCH AND NUCLEAR ENERGY - BAS
Aleksander Mladenov, Tzvetana Nonova, Dobromir Dimitrov, Kiril Krezhov
Received: 21 FEB 2016,
Received revised: 30 MARCH 2016,
Accepted: 8 MAY 2016,
Published online: 26 DEC 2016
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The paper gives an overview of the management of radioactive waste (RAW) generated during the operation and maintenance of the facilities at the Nuclear Scientific Experimental and Educational Centre (NSEEC) of the Institute for Nuclear Research and Nuclear Energy at the Bulgarian Academy of Sciences (BAS). It covers the basic procedures adopted at the NSEEC for the collection of solid and liquid RAW, their classification, categorization and storage as well as the chain of command for RAW tracking, transportation and reporting. The accumulated solid RAW is stored according to the international and Bulgarian regulations in separate safe boxes (in the designated premise of every laboratory on the site of NSEEC), in monitored storage rooms (for the I Class Radiochemical Laboratory) and in a separate building (Reactor Equipment Storage). At present, the largest inventory of discarded sources of ionizing radiation is stored in the Gamma Irradiation Facility. In 2009, the low and medium activity liquid RAW stored in the underground tanks of the IRT-2000 research reactor were shipped for final p to the reprocessing facility of Kozloduy NPP and, at present, there are small amounts of low activity liquid RAW stored mainly in the II Class Radiochemical Laboratory. Among the main steps during the implementation of any RAW treatment activities is the detailed assessment of the doses accumulated by the personnel as well as providing the admissible working conditions - devices and accessories, personal means of protection, measuring appliances for overall dosimetry control, conduct of personnel instructions, etc., so that the collected doses are in the permissible limits determined by the legislation in force in Bulgaria and the internal regulations of INRNE for work with sources of ionizing radiation.
- Tz. Nonova, D. Stankov, Al. Mladenov, K. Krezhov.“Radiological characterization activities during the partial dismantling of the IRT - Sofia research reactor facilities,” Roman. J. Phys., vol. 59, no. 9-10, pp. 976 – 988, 2014.
- I. S. Dimitrov, Tz. Nonova, Al. Mladenov, K. Krezhov. “Radiation levels at carrying out the refurbishment of the Bulgarian research reactor IRT-2000,” in RAD 2015 Proceedings, Budva, Montenegro, 2015, pp.203-208
- Al. Mladenov, D. Stankov, Tz. Nonova, K. Krezhov. “Radiation protection, radioactive waste management and site monitoring at the Nuclear Scientific Experimental and Educational Centre IRT-Sofia at INRNE – BAS,” Rad. Prot. Dosim., vol. 162, no. 1-2, pp. 176-181, 2014.
- Strategy for the management of spent nuclear fuel and radioactive waste up to 2030, Sofia, Bulgaria, 2011.
- Bulgarian Nuclear Regulatory Agency. (June 28, 2002, amen. August 02, 2013). Act on the Safe Use of Nuclear Energy (ASUNE)
- Bulgarian Nuclear Regulatory Agency.(2012). Regulation for safe management of radioactive waste
- The Council of European Union. (May 13, 1996). Council Directive 96/29/Euratom
- The Council of European Union. (December 5, 2013). Council Directive 2013/59/Euratom
- Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards, Series No. GSR Part 3, IAEA, Vienna, July 19, 2014.
- Predisposal Management of Radioactive Waste, Series No. GSR Part 5, IAEA, Vienna, May 19, 2009.
- Decommissioning of Facilities, Series No. GSR Part 6, IAEA, Vienna, July 08, 2014.
- The Management System for the Processing, Handling and Storage of Radioactive Waste, Series No. GS-G-3.3, IAEA, Vienna, July 02, 2008.
- Classification of Radioactive Waste, Series No. GSG-1, IAEA, Vienna, December 28, 2009.
- Environmental and Source Monitoring for Purposes of Radiation Protection, Series No. RS-G-1.8, IAEA, Vienna, August 22, 2005.
- Categorization of Radioactive Sources, Series No. RS-G-1.9, IAEA, Vienna, August 15, 2005.
- Predisposal Management of Low and Intermediate Level Radioactive Waste, Series No. WS-G-2.5, IAEA, Vienna, April 30, 2003.
- Predisposal Management of High Level Radioactive Waste, Series No. WS-G-2.6, IAEA, Vienna, April 30, 2003.
- Storage of Radioactive Waste, Series No. WS-G-6.1, IAEA, Vienna, November 28, 2006.
- Disposal of Radioactive Waste, Series No. SSR-5, IAEA, May 05, 2011.
- I NSEC 05 02 "Instruction on the collection, categorization, classification, storage and reporting of RAW," INRNE, Sofia, Bulgaria, June 06, 2013.
- INRNE, “Detailed plan for the partial dismantling of the IRT2000 before its reconstruction into a low power reactor,” AtomEnergoproekt, INRNE, Sofia, Bulgaria, February, 2009.
- F NSEC 05 02 “Generated RAW Log records,” INRNE, Sofia, Bulgaria, June 06, 2013.
- F NSEC 05 06 “Protocol of measurements of the levels and volumes of RAW in LRAWS,” INRNE, Sofia, Bulgaria, June 05, 2013.
- I. Pandev, H. Hristov, M. Hristova, S. Stefanov and D. Genov, “The Gamma-Irradiation Installation GOU-1 at INRNE-BAS,” Nuclear Energy, vol. 3, pp. 68-74, 1976.
- Regulation on the conditions and procedure of transport of radioactive material, BNRA, Sofia, 2014.
- “Safety Analyses Report of IRT-Sofia, INRNE, Sofia, Bulgaria, January 10, 2011.
- I NSEEC 01 03 “General Emergency Plan,” INRNE, Sofia, Bulgaria, June 17, 2013.