Authors & Affiliations

Egorov A.L., Zaritskiy S.M., Kazenov K.B., Kochkin V.N., Moryakov A.V., Reshetnikov A.A.
National Research Center "Kurchatov institute", Moscow, Russia

Egorov A.L. – Head of Laboratory, Cand. Sci. (Tech.), National Research Center "Kurchatov institute".
Zaritskiy S.M. – Head of Department, Cand. Sci. (Phys-Math.), National Research Center "Kurchatov institute".
Kazenov K.B. – Junior Researcher, National Research Center "Kurchatov institute".
Kochkin V.N. – Head of Laboratory, National Research Center "Kurchatov institute".
Moryakov A.V. – Leading Researcher, Cand. Sci. (Phys-Math.), National Research Center "Kurchatov institute". Contacts: 1, Akademika Kurchatova pl., Moscow, Russia, 123182. Tel.: +7(499)196-71-98; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Reshetnikov A.A. – Head of Group, National Research Center "Kurchatov institute".

Abstract

The comparative calculations of the fast neutron flux on the VVER-1000 pressure vessel were carried out using TORT and LUCKY-A discrete ordinates codes. Code LUCKY-A was created for solving the stationary and non-stationary problems of radiation transport using parallel calculations on multi-processor computers. The activity of the 54Mn and 93mNb detectors was calculated also on the pressure vessel outer surface. The results are compared with experimental data obtained on the NPP Kalinin-1 reactor.
3D models for TORT and LUCKY-A for calculation and experiment description are presented. Purpose of this work is estimation of the LUCKY-A code potential to calculate the radiation dose in the reactor vessel.
The parallel algorithm of LUCKY-A code uses space decomposition method to resolve transport equation. Every space domain as a part of calculated region is considered as boundary-value problem and resolved as individual calculation process by supercomputer. The MPI technology is used for the data exchange. The angular flux solutions on the common boundaries of space domains are used of as boundary-value conditions ensuring the solution continuity. Thus, the final solution of the considered task may be obtained by iteration process using of parallel calculations. Only XYZ geometry is available for numerical interpretation of the transport equation. This one may be considered as universal geometry when space intervals are small. LUCKY-A code is intended for resolving the complex large-scale transport tasks using all available resources of supercomputer.

Keywords
VVER-1000, Algorithm, Transport Equation, Reactor Vessel, PmSn approximation, Supercomputer, Solution, Space Domain, MPI technology, Fast Energy Fluxes, Exposed unit, Neutron Activated Detector Set

Article Text (PDF, in Russian)

References

UDC 621.039

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2018, issue 1, 1:11