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[en] Now only one Dry Storage Facility of Spent Nuclear Fuel (DSFSNF) is operated in Ukraine – facility on Zaporizhska NPP. Many different thermal investigations were done for ventilated containers of DSFSNF. In this work the generalization of scientific approaches to the thermal safety assessment are carried out. The multi-stage approach to the definition of thermal state of containers' group, single container, spent fuel assemblies and fuel rods was developed. Detailed thermal profiles of spent fuel assemblies and each fuel rod inside storage container were calculated. With usage of multistage approach the thermal simulations of accident conditions and influence of outer factors onto thermal state of containers were carried out. On base of obtained results the classification of accidents with channels blockage was developed and the most dangerous blockages were found. Results of thermal investigations were generalized and factors, which are influence on thermal state of containers, are detected. Method of spent nuclear fuel thermal state prediction and changes to the system of thermal monitoring were proposed. (author)
Source
International Atomic Energy Agency, Division of Nuclear Fuel Cycle and Waste Technology and Division of Radiation, Transport and Waste Safety, Vienna (Austria); OECD Nuclear Energy Agency, Paris (France); European Commission, Brussels (Belgium); World Nuclear Association, London (United Kingdom); [1 CD-ROM]; ISBN 978-92-0-108620-4; 
; May 2020; 5 p; International conference on management of spent fuel from nuclear power reactors: Learning from the past, enabling the future; Vienna (Austria); 24-28 Jun 2019; IAEA-CN--272/3; ISSN 0074-1884; ; CONTRACT IAEA 20605; Also available on-line: https://www.iaea.org/publications/14680/management-of-spent-fuel-from-nuclear-power-reactors?supplementary=82942; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books; 5 refs., 8 figs.
; May 2020; 5 p; International conference on management of spent fuel from nuclear power reactors: Learning from the past, enabling the future; Vienna (Austria); 24-28 Jun 2019; IAEA-CN--272/3; ISSN 0074-1884; ; CONTRACT IAEA 20605; Also available on-line: https://www.iaea.org/publications/14680/management-of-spent-fuel-from-nuclear-power-reactors?supplementary=82942; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books; 5 refs., 8 figs.