Authors & Affiliations

Fraaz E.S., Malkov A.P.
JSC “State Scientific Center — Research Institute of Atomic Reactors”, Dimitrovgrad, Russia

Fraaz E.S. – Research Associate, JSC “State Scientific Center — Research Institute of Atomic Reactors”. Contacts: 9, Zapadnoye Shosse, Dimitrovgrad, Ulyanovsk region, 433510. Tel.: +7(84235) 7-39-73; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Malkov A.P. – Head of department of nuclear safety, Dr. Sci. (Techn.), JSC “State Scientific Center — Research Institute of Atomic Reactors”.

Abstract

The main results of neutron and physical calculations for the unirradiated and fulfilled fuel storages of the MBIR reactor, transport processing equipment and radiation protective cameras are adduced in this work. The analysis was made in full accordance with requirements of the state normative doc-uments for nuclear safety of research nuclear facilities. The results of effective neutron reproduction coefficient calculations received with use of the MCU-RFFI/A program were used for the analysis. According to the results of neutron and physical calculations, the NSM mass, enrichment, a step and geometry of placement of products in a binding reactor facility rooms restrictions were set, norms of loading at which nuclear safety at the unirradiated and fulfilled storage of MBIR reactor fuel, transport and technological operations are provided both in regular conditions, and in the considered emergencies were defined. The dependence of effective coefficient of neutron reproduction changes at unauthorized water ingress into points of "dry" storage and the equipment from water density was calculated, the maximum values were defined. The extreme values of effective neutron reproduction coefficient at violation of placement geometry of the nuclear sharing materials owing to external influences and human errors were also defined. The quantity and geometry restrictions of products arrangement with the nuclear sharing materials for all radiation protective cameras on the basis of settlement researches were set.

Keywords
nuclear safety, MBIR reactor, packing set, warehouse of fresh fuel, cooling pond, transport and technological operations, research radiation protective cameras, MCU-RFFI/A program, settlement models, effective coefficient of reproduction of neutrons, neutron and physical calculations

Article Text (PDF, in Russian)

References

UDC 621.039.58

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants", 2019, issue 2, 2:20