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
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.
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.
LMFBR, BN-800, Delayed Neutrons Failed Fuel Detection System, Photo-neutrons
1. Luk'yanov D.A., Albutova O.I. Metod lokalizatsii defektnykh TVS v reaktorakh na bystrykh neytronakh [Failed fuel assemblies location method for LMFBR]. Voprosy Atomnoy Nauki i Tekhniki. Seriya: Yaderno-reaktornye konstanty - Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constans, 2017, no. 3, pp. 99-116.
2. Luk'yanov D.A., Albutova O.I. Issledovanie zavisimosti pokazaniy sektornoy sistemy kontrolya germetichnosti obolochek tvelov reaktora BN-600 ot ekspluatatsionnykh parametrov [Investigation of the dependence testimony sector control system leak fuel cladding BN-600 reactor on the operational parameters]. Izvestiya vuzov. Yadernaya energetika - Proseedings of Universities. Nuclear Power Engineering, 2015, no. 2, pp. 32-37.
3. Baklushin R.P. Tekhnologiya energoblokov AES s natrievym teplonositelem. (Istoriya razvitiya i opyt ekspluatatsii) [Technology of power units of nuclear power plants with sodium coolant. (History of development and operational experience)]. Obninsk, IPPE Publ., 2012. 300 p.
4. Dvornikov P.A., Bogomolov V.N., Kovtun S.N., Kudryaev A.A., Luk'yanov D.A., Shutov S.S., Albutova O.I., Boltunov A.N., Osipov S.L., Staroverov A.I., Salyaev A.V., Zverev I.D. Opyt vvoda v ekspluatatsiyu sektornoy sistemy kontrolya germetichnosti obolochek tvelov RU BN-600 i RU BN-800 [Experience of commissioning of the sectoral monitoring tightness system of fuel elements claddings (SSKGO) of RF BN-600, RF BN-800]. Trudy 10 mezhdunarodnoy nauchno-tekhnicheskoy konferentsii "Bezopasnost', effektivnost' i ekonomika atomnoy energetiki" [Proc. 10th Int. Sci. Conf. "Safety, Efficiency and Economics of Nuclear Energy"]. Moscow, 2016.