Nuclear Physics and Atomic Energy

ßäåðíà ô³çèêà òà åíåðãåòèêà
Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English
  Periodicity: 4 times per year

  Open access peer reviewed journal


 Home page   About 
Nucl. Phys. At. Energy 2022, volume 23, issue 2, pages 107-115.
Section: Atomic Energy.
Received: 07.07.2022; Accepted: 14.09.2022; Published online: 29.09.2022.
PDF Full text (en)
https://doi.org/10.15407/jnpae2022.02.107

Preliminary safety analysis at the decommissioning of the WWR-M research reactor

Yu. M. Lobach1,*, S. Yu. Lobach2, V. M. Shevel1

1 Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
2 Nuclear and Industrial Engineering (N.IN.E.) S.R.L., Lucca, Italy


*Corresponding author. E-mail address: lobach@kinr.kiev.ua

Abstract: Following the demands established by the current Ukrainian legislation, the Decommissioning Concept for the WWR-M research reactor was recently approved. The Concept envisages a strategy of immediate dismantling; it identifies and justifies the main technical and organizational measures for the preparation and implementation of decommissioning, the sequence of planned works and activities, as well as the necessary conditions and infrastructure. Decommissioning requires proper planning and demonstration that all planned dismantling works will be carried out safely. Presented safety assessment is a mandatory component of the Concept and the most important element of the overarching technological scheme. The purpose of the safety analysis is to provide input for detailed planning on how to ensure safety during decommissioning. Based on the results of the safety analysis, the measures to ensure radiation protection are defined while justifying their necessity and sufficiency.

Keywords: research reactor, decommissioning, dismantling, radioactive waste, radiation safety.

References:

1. Yu.M. Lobach et al. Principal provisions of the decommissioning concept for the WWR-M reactor. Nucl. Phys. At. Energy 22(4) (2021) 348. https://doi.org/10.15407/jnpae2021.04.348

2. Decommissioning of Facilities. General Safety Requirements. IAEA Safety Standards Series. General Safety Requirements No. GSR Part 6 (Vienna: IAEA, 2014) 44 p. https://www-pub.iaea.org/MTCD/publications/PDF/Pub1652web-83896570.pdf

3. Safety Assessment for the Decommissioning of Facilities Using Radioactive Material. IAEA Safety Standards No. WS-G-5.2 (Vienna: IAEA, 2008) 79 p. https://www-pub.iaea.org/MTCD/Publications/PDF/Pub1372_web.pdf

4. Decommissioning of Nuclear Power Plants, Research Reactors and Other Nuclear Fuel Cycle Facilities. IAEA Safety Standards. Specific Safety Guide No. SSG-47 (Vienna: IAEA, 2018) 120 p. https://www-pub.iaea.org/MTCD/Publications/PDF/P1812_web.pdf

5. Decommissioning of Medical, Industrial and Research Facilities. IAEA Safety Standards. Specific Safety Guide No. SSG-49 (Vienna: IAEA, Vienna, 2019) 126 p. https://www-pub.iaea.org/MTCD/Publications/PDF/PUB1841_Web.pdf

6. Format and Content of the Safety Analysis Report for Nuclear Power Plants Safety Guide. IAEA Safety Standards Series. Safety Guide No. GS-G-4.1 (Vienna: IAEA, 2004) 91 p. https://www-pub.iaea.org/MTCD/Publications/PDF/Pub1185_web.pdf

7. Predisposal Management of Radioactive Waste. IAEA Safety Standards. General Safety Requirements No. GSR Part 5 (Vienna: IAEA, 2009) 56 p. https://www-pub.iaea.org/MTCD/publications/PDF/Pub1368_web.pdf

8. Yu.M. Lobach, Î.V. Svarychevska, V.V. Tryshyn. Peculiarities of the environmental impact assessment at the decommissioning of the research reactor WWR-M. Nuclear and Radiation Safety 11 (2008) 29. (Ukr) https://doi.org/10.32918/nrs.2008.11-3(39).07

9. V. Tryshyn et al. Results of long-term radiation monitoring of the impact of the WWR-M research reactor of the Institute for Nuclear Research of the NAS of Ukraine on environmental objects within control and observation areas. Nuclear and Radiation Safety 1(89) (2021) 21. (Ukr) https://doi.org/10.32918/nrs.2021.1(89).03

10. Decommissioning of Research Reactors: Evolution, State of the Art, Open Issues. IAEA Technical Report Series 446 (Vienna: IAEA, 2006) 169 p. https://www-pub.iaea.org/MTCD/Publications/PDF/TRS446_web.pdf

11. Safety Considerations in the Transition from Operation to Decommissioning of Nuclear Facilities. Safety Reports Series No. 36 (Vienna: IAEA, 2004) 48 p. https://www-pub.iaea.org/MTCD/Publications/PDF/Pub1184_web.pdf

12. Achieving the Goals of the Decommissioning Safety Case. OECD/NEA No. 5417 (Paris, 2005) 40 p. https://www.oecd-nea.org/upload/docs/application/pdf/2019-12/nea5417-decom.pdf

13. Release of Radioactive Materials and Buildings from Regulatory Control. OECD/NEA No. 6403 (Paris, 2008) 72 p. https://www.oecd-nea.org/upload/docs/application/pdf/2019-12/nea6403-regulatory.pdf

14. A. Simonis et al. Modeling of the radiation doses during dismantling of RBMK-1500 reactor pressurized tanks from emergency core cooling system. Science and Technology of Nuclear Installations 2013 (2013) 159. https://doi.org/10.1155/2013/576432

15. K.S. Jeong et al. A quantitative identification and analysis of hazards, risks and operational procedures for a decommissioning safety assessment of a nuclear research reactor. Annals of Nuclear Energy 35(10) (2008) 1954. https://doi.org/10.1016/j.anucene.2008.05.008

16. Yu.N. Lobach, G. Toth. Design for the WWR-M reactor vessel removal. Nuclear Engineering and Design 258 (2013) 184. https://doi.org/10.1016/j.nucengdes.2013.01.032

17. Yu.N. Lobach, M.T. Cross. Dismantling design for a reference research reactor of the WWR type. Nuclear Engineering and Design 266 (2014) 155. https://doi.org/10.1016/J.NUCENGDES.2013.11.041

18. Yu.N. Lobach, V.N. Shevel. Design for the dismantling of the WWR-M primary cooling circuit. International Nuclear Safety Journal 3(4) (2014) 25. https://nuclearsafety.info/international-nuclear-safety-journal/index.php/INSJ/article/view/44/pdf

19. D. Craig et al. Technical features of the MR reactor decommissioning. Nuclear Technology and Radiation Protection 23(2) (2008) 79. https://doi.org/10.2298/NTRP0802079C

20. D. Craig et al. Dismantling design for the loop rooms on the MR reactor. Nuclear Engineering and Design 239(12) (2009) 2832. https://doi.org/10.1016/j.nucengdes.2009.08.011

21. Radiation safety standards of Ukraine, supplement: Radiation protection from sources of potential exposure (RSSU-97/D-2000). State Hygienic Standards: SHS 6.6.1-6.5.061 (Kyiv, 2000). (Ukr) https://dnaop.com/html/43243/doc-%D0%94%D0%9D%D0%90%D0%9E%D0%9F_-97

22. Yu.N. Lobach, E.D. Luferenko, V.N. Shevel. Radiation protection performance for the dismantling of the WWR-M primary cooling circuit. Radiation Protection Dosimetry 162(3) (2014) 416. https://doi.org/10.1093/rpd/nct306

23. Yu.N. Lobach, V.N. Shevel. Pre-decommissioning complex engineering and radiation inspection of the WWR-M reactor. Kerntechnik 79 (2014) 128. https://doi.org/10.3139/124.110339

24. T. Shimada, S. Ohshima, T. Sukegawa. Development of safety assessment code for decommissioning of nuclear facilities (DecDose). Journal of Power and Energy Systems 4(1) (2010) 40. http://dx.doi.org/10.1299/jpes.4.40

25. Airborne release fractions/rates and respirable fractions for nonreactor nuclear facilities. Vol. 1: Analysis of Experimental Data. DOE-HDBK 3010-94 (Washington: U.S. Department of Energy, 1994) 359 p. https://www.nrc.gov/docs/ML1307/ML13078A031.pdf

26. Yu.N. Lobach, V.N. Shevel. Radiation protection tasks on the Kiev research reactor WWR-M. Nuclear Technology and Radiation Protection 24(2) (2009) 145. https://doi.org/10.2298/NTRP0902145L