The energy release and temperature field in the ultracold neutron source of the WWR-M reactor at the Petersburg Nuclear Physics Institute

• Published in: Physics of atomic nuclei 2016-12, Vol.79 (9-10), p.1391-1396
• Main Authors: Serebrov, A. P., Kislitsin, B. V., Onegin, M. S., Lyamkin, V. A., Prudnikov, D. V., Ilatovskiy, V. A., Orlov, S. P., Kirsanov, G. A., Fomin, A. K., Filchenkova, D. V.
• Format: Article
• Language: English
• Subjects: Analytical instruments; DEUTERIUM; Engineering Design of Nuclear Physics Equipment; Fluids; HELIUM; Hostages; LEAD; Mathematical analysis; NEUTRON SOURCES; Neutrons; Nuclear electric power generation; Nuclear physics; Nuclear reactors; Particle and Nuclear Physics; Physics; Physics and Astronomy; REACTOR CORES; SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; ST PETERSBURG INSTITUTE OF NUCLEAR PHYSICS; SUPERFLUIDITY; Temperature; TEMPERATURE DISTRIBUTION; ULTRACOLD NEUTRONS; WWR-M-LENINGRAD REACTOR
• ISSN: 1063-7788; 1562-692X
• DOI: 10.1134/S1063778816090118

Results of calculations of energy releases and temperature fields in the ultracold neutron source under design at the WWR-M reactor are presented. It is shown that, with the reactor power of 18 MW, the power of energy release in the 40-L volume of the source with superfluid helium will amount to 28.5 W, while 356 W will be released in a liquid-deuterium premoderator. The lead shield between the reactor core and the source reduces the radiative heat release by an order of magnitude. A thermal power of 22 kW is released in it, which is removed by passage of water. The distribution of temperatures in all components of the vacuum structure is presented, and the temperature does not exceed 100°C at full reactor power. The calculations performed make it possible to go to design of the source.