Construction of the New Safe Confinement (NSC) above the Shelter over destroyed Chornobyl NPP Unit 4 has been completed. The NSC design is based on boundary conditions for current and potential hazardous impacts of the Shelter. Accordingly, criteria for Shelter safe state have to be established, in particular, criteria for the safe state of fuel-containing material (FCM) accumulations.
The paper presents the results of the development of methodological recommendations for the establishment of acceptance/non-acceptance criteria of FCM accumulations with regard to safety, as well as on the FCM monitoring scope in order to monitor the extent of compliance of FCM state with the established criteria.
2. SIP-PMU P7. The strategy for FCM retrieval and radioactive waste management.
3. Analysis of factors determining the safe state of the Shelter within the New Safe Confinement.
4. SIP-P-PM-22-460-SAR-124-05. Shelter Safety Status Report.
5. SSR-SO 2018/1. Shelter Safety Status Report for the first half of 2018.
6. DGN 6.6.1.-6.5.001-98. Radiation Safety Standards of Ukraine NRBU-97. Approved by Resolution No. 62 of the Chief State Medical Doctor of Ukraine dated 01 December 1997 (Revision of 12 July 2000).
7. Technical Specifications for “The Shelter of Chornobyl Nuclear Power Plant Unit 4”. 1R-Shelter.
8. Krasnov, V.A, Godun, R. L. (2019). The state of fuel-containing materials inside the NSC Arch and problems related to nuclear and radiation safety. ISSN 1813-3584. Safety Problems of Nuclear Power Plants and Chornobyl. Pub.32.