Authors & Affiliations

Gulevich A.V., Dolgikh V.P., Eliseev V.A., Peregudova O.O., Rozhikhin E.V., Semenov M.Yu., Stogov V.Yu., Tormyshev I.V.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia

Gulevich A.V. – Deputy Director of the Department of Nuclear Energy, Dr. Sci. (Phys. and Math.), A.I. Leypunsky Institute for Physics and Power Engineering.
Dolgikh V.P. – Senior Researcher, Cand. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Eliseev V.A. – Head of laboratory, Cand. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Peregudova O.O. – Researcher, A.I. Leypunsky Institute for Physics and Power Engineering.
Rozhikhin E.V. – Senior Researcher, A.I. Leypunsky Institute for Physics and Power Engineering.
Semenov M.Yu. – Leading Researcher, Cand. Sci. (Phys. and Math.), A.I. Leypunsky Institute for Physics and Power Engineering.
Stogov V.Yu. – Senior Researcher, A.I. Leypunsky Institute for Physics and Power Engineering.
Tormyshev I.V. – Leading engineer, A.I. Leypunsky Institute for Physics and Power Engineering. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7 (484) 399-47-82; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Abstract

Maximum core height of BN-type reactors is limited by safety considerations. If the core height exceeds 85-90 cm, ULOF-type accident leads to the heavy core damage. Hence, increase of reactor power leads to increase of core diameter and D/H ratio. Neutron field stability in the large diameter cores should be considered.
Ratio of the two first eigenvalues of static reactor balance equation (dominance ratio) widely used as neutron field stability criterion. The results of dominance ratio evaluation for large BN-type reactor are considered in the article. Dominance ratio of BN-type reactor compared with dominance ratios for several high power thermal reactors. It is shown that dominance ratio of BN-type high power reactor is still lower, than that of thermal reactors. Hence, instability of neutron field in BN-type reactors due to high dominance ratio seems to be unlikely.

Keywords
BN-type reactor, dominance ratio, neutron field stability, static reactor balance equation

Article Text (PDF, in Russian)

References

UDC 621.039.51

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2019, issue 4, 4:6