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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:51 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Radiological characterization to demonstrate the end stage for the VVR-S nuclear reactor building
Authors:
E. Ionescu(1), D. Gurau(1), M. Sima(1,2), D. Stanga(1)
Affiliation:
1) Horia Hulubei National Institute for Physics and Nuclear Engineering, Magurele, Romania
2) Joint Research Centre, European Commission, Karlsruhe, Germany
E-mail
eionescu@nipne.ro
Keywords:
Decommissioning; Radiological characterization; Restricted reuse
Abstract:
The VVR-S nuclear research reactor in Magurele, Romania, operated for 40 years before being closed in 1997. After 6 years of conservation, the Romanian government took the decision to permanently shut down the reactor and an immediate dismantling strategy was implemented. The decommissioning process involved dismantling of the reactor components and decontamination of the working areas. As part of the final step of decommissioning, a radiological survey was conducted to assess the level of residual radioactivity on the site. This paper focuses on the methodology employed for the radiological characterization of the reactor building and presents the methods and techniques utilized. The goal was to ensure that the building met the release criteria, thus allowing for its potential restricted reuse in the future. The study also showcases the results obtained for representative areas within the VVR-S nuclear research reactor. In compliance with national legislation, the authorization holder submitted a request to the regulatory body for approval of the restricted reuse of the building. This request was supported by a thorough comparison of the radiological characterization results with the levels stipulated in both national and international standards. By conducting a comprehensive radiological survey and employing appropriate methods and techniques, the study provides valuable insights into the state of the VVR-S nuclear research reactor and its potential for future use. The findings, in conjunction with compliance to regulatory standards, contribute to informed decision-making regarding the building's future.
References:
[1] https://nucleus.iaea.org/rrdb/#/home
[2] CNCAN, NSR 01, Radiological Safety Fundamentals Norms, Bucharest, Romania (2000)
[3] CNCAN, NDR-02, Norms for release of materials, Bucharest, Romania (2004)
[4] CNCAN, The decommissioning norms, Bucharest, Romania (2000)
[5] NEA/RWM/WPDD, Radiological Characterisation for Decommissioning of Nuclear Installations (2013)2
[6] IAEA, TRS 389, Radiological Characterization of Shut Down Nuclear Reactors for Decommissioning Purposes, Vinna, (1998)
[7] IONESCU, E, GURAU, D, STANGA, D, DULIU, O, G, Romanian Reports in Physics, RRP, “Decommissioning of the VVR-S research reactor-radiological characterization of the reactor block” (2021), 387-398.
[8] EPA, NRC, DOE, DOD, MARSSIM, The Multi-Agency Radiation Survey and Site Investigation Manual, Revision1, August (2000).
[9] IAEA, Monitoring for Compliance with Exemption and Clearance Levels, SRS No. 67, Vienna, (2012).
Acknowledgement:
This work was supported by CORE/NUCLEU/PN 23-21
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