Peer-reviewed articles 17,970 +



Title: IMPACT ON THE NUCLEAR SAFETY OF THE 235U FISSION BY FAST NEUTRONS IN A THERMAL REACTOR

IMPACT ON THE NUCLEAR SAFETY OF THE 235U FISSION BY FAST NEUTRONS IN A THERMAL REACTOR
N. Oshkanov
1314-2704
English
19
4.1
Background. The issue discussed in this paper is caused by the historically established opinion that in thermal reactors the fission of uranium-235 by fast neutrons, which are formed during its fission by thermal neutrons, can be ignored. The purpose of the study is to assess the effect of the fission of uranium-235 by fast neutrons on the nuclear safety of a thermal reactor.
Methods. For the study, the method of comparing fast neutron multiplication coefficients in the fission of uranium-235 by fast neutrons and without it is used and, on this basis, determination of the nuclear safety conformity to of a nuclear reactor. We used a multigroup method for estimating averaged neutron cross sections.
Results. The main result of the work is the determination of the need to account for the fission of uranium-235 by fast neutrons in a thermal reactor, regardless of the enrichment of nuclear fuel of a thermal reactor by uranium-235 and the operating mode of the reactor (in a critical or subcritical state).
Conclusion. To ensure nuclear safety of a thermal reactor in a subcritical state, the calculation of the multiplication factor on fast neutrons must be conducted either taking into account the fission of uranium-235 by fast neutrons, or using the derived formula for the correction factor without taking into account the fission of uranium-235 by fast neutrons.
conference
19th International Multidisciplinary Scientific GeoConference SGEM 2019
19th International Multidisciplinary Scientific GeoConference SGEM 2019, 30 June - 6 July, 2019
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
3-10
30 June - 6 July, 2019
website
cdrom
5806
fast neutron multiplication factor; subcriticality; nuclear safety; multigroup method.

24th SGEM International Conference on Earth & Planetary Sciences


International GeoConference SGEM2024
28 June - 8 July, 2024 / Albena, Bulgaria

Read More
   

SGEM Vienna GREEN "Green Science for Green Life"


Extended Scientific Sessions SGEM Vienna GREEN
25 - 29 November, 2024 / Vienna, Austria

Read More
   

A scientific platform for Art-Inspired Scientists!


The Magical World Where Science meets Art
Vienna, Austria

Read More