Authors & Affiliations

Kulikov V.I.1, Semenova T.V.2, Zhylmaganbetov N.M.3, Popykin A.I.3, Smirnova A.A.3
1 St. Petersburg branch of Joint-stock company Federal centre for science and high technology "Special scientific and production Association “Eleron”-“VNIPIET”, Saint Petersbugr, Russia
2 Russian Federal Nuclear Center All-Russian Research Institute of Experimental Physics, Sarov, Russia
3 Scientific and Engineering Centre for Nuclear and Radiation Safety, Moscow, Russia

Kulikov V.I. – Head of a Laboratory, Cand. Sci. (Phys.-Math.), St. Petersburg branch of Joint-stock company Federal center for science and high technology "Special scientific and production Association "Eleron"-"VNIPIET".
Semenova T.V. – Head of a Department, Cand. Sci. (Phys.-Math.), Russian Federal Nuclear Center All-Russian Research Institute of Experimental Physics.
Zhylmaganbetov N.M. – Research Associate, Scientific and Engineering Centre for Nuclear and Radiation Safety.
Popykin A.I. – Head of a Laboratory, Cand. Sci. (Phys.-Math.), Scientific and Engineering Centre for Nuclear and Radiation Safety.
Smirnova A.A. – Junior Researcher, Scientific and Engineering Centre for Nuclear and Radiation Safety.

Abstract

The article represents the results of calculations of the influence factors of fuel assemblies on the current of ionizing chambers (IC) in the simulation of a reaktimetr of reactor VVER. Two independent approaches and two programs were used to solve the neutron transport equation. The influence factors of the extreme series of fuel assemblies nearest to the reflection shield and IC on the IC readings are calculated. According to the known software "MCNP-4C" factors are obtained from the solution of forward and adjoint problems. Software "TDMCC", developed in RFNC-VNIIEF, the influence factors obtained from the solution of the forward problem. Both of programs implement the Monte Carlo method to solve the transport equation. The obtained coefficients were used in the calculations of measurements that were carried out at the physical start-up of unit 1 of Novovoronezh-2 NPP, in-cluding the simulation of measurement of scram-system efficiency. The article represents the depend-ence of the relative current on time in the logarithmic scale, as well as the dependence of reactivity on time, built on the results of numerical simulation using three sets of the influence factors in the process of resetting the scram-system. As an illustration, the dependencies are not different from each other.

Keywords
VVER, ionization chamber, simulation, influence factor, unit 1 of Novovoronezh-2 NPP

Article Text (PDF, in Russian)

References

UDC 621.039

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants", 2019, issue 2, 2:23