PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
Series: Nuclear and Reactor Constants

since 1971

Русский (РФ)

ISSN 2414-1038 (online)

BROND-3.1

ISSUES

THE INFLUENCE OF PHOTO-NEUTRONS ON THE INDICATIONS OF DELAYED NEUTRONS FAILED FUEL DETECTION SYSTEM AT THE BN-800 REACTOR

Authors & Affiliations

Albutova O.I.1, Lukyanov D.A.1, Zverev I.D.2, Usynina S.G.2, Mikhaylenko M.A.3, Gur'ev S.A.3
1 A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
2 Afrikantov Experimental Design Bureau for Mechanical Engineering, Nizhny Novgorod, Russia
3 Beloyarsk Nuclear Power Plant, Zarechnyj, Russia

Albutova O.I. – Junior Researcher, A.I. Leypunsky Institute for Physics and Power Engineering. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7(484) 399-42-88; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Lukyanov D.A. – Leading Researcher, Cand. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Zverev I.D. – First category constructor engineer, Afrikantov Experimental Design Bureau for Mechanical Engineering.
Usynina S.G. – Leading constructor engineer, Afrikantov Experimental Design Bureau for Mechanical Engineering.
Mikhaylenko M.A. – Third category engineer, Beloyarsk Nuclear Power Plant.
Gur'ev S.A. – Leading engineer, Beloyarsk Nuclear Power Plant.

Abstract

The investigation of the photo-neutrons flux affecting the readings of Delayed Neutrons Failed Fuel Detection System (SSKGO) at the BN-800 reactor, is presented.
The photo-neutrons flux density was estimated based of SSKGO background readings at the reactor shut-down. The residual level and subsequent smooth decrease of SSKGO background readings are caused by photo-neutrons, generated by the materials of SSKGO detecting units and the reactor shielding under the gamma radiation of sodium coolant.
Various factors affecting the SSKGO background readings at reactor shut-down were considered, the regression model has been developed. The influence of the photo-neutron flux on SSGKO indications at the power level is 2,8±0,5 n/(cm2·s), agrees with the design value 2,5 n/(cm2·s).
The results of the investigation can be used to increase the SSKGO efficiency under the transient operation of the BN-800 reactor.

Keywords
 LMFBR, BN-800, Delayed Neutrons Failed Fuel Detection System, Photo-neutrons

Article Text (PDF, in Russian)

References

UDC 621.039.54

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2017, issue 4, 4:13