ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 21 December 2005
Page Count: 5

Experimental and Calculation Investigations of the Space-Energy Neutron and Photon Distribution in the Vicinity of Reactor Pressure Vessel and Surveillance Specimen Box of New Type in the WWER-1000 Mock-Up

Ošmera, B
Chief Scientist, Senior Engineer, Nuclear Research Institute Řež plc, Řež,

Mařík, M
Chief Scientist, Senior Engineer, Nuclear Research Institute Řež plc, Řež,

Cvachovec, F
Professor, University of Defence, Brno,

Tsofin, V
Head of Bureau, EDO GIDROPRESS, Moscow Region,

Lomakin, S
Senior Staff Scientist, SEC of GOSATOMNADZOR, Moscow,

Zaritsky, S
Head of Department, Senior Staff Scientist, Senior Staff Scientist, Russian Research Center “Kurchatov Institute”, Moscow,

Egorov, A
Head of Department, Senior Staff Scientist, Senior Staff Scientist, Russian Research Center “Kurchatov Institute”, Moscow,

Brodkin, E
Head of Department, Senior Staff Scientist, Senior Staff Scientist, Russian Research Center “Kurchatov Institute”, Moscow,

(Received 20 June 2005; accepted 29 September 2005)

Abstract

The radiation field parameters in the vicinity of new type of WWER-1000 surveillance specimens boxes and in RPV simulator have been investigated in the WWER-1000 Mock-up in the reactor LR-0. The neutron and photon spectra have been measured with stilbene cylindrical crystals in the energy range approximately from 0.5 MeV to 10 MeV. The experimental values of integral neutron field parameters (attenuations of integral neutron flux densities between different points of mock-up as well as the spectral indices, i.e., ratios of integral neutron flux densities with different thresholds) were obtained also. The mock-up (LR-0 reactor) power monitoring during measurements was carried out with two fission chambers, one fixed, one moveable axially, so that four orders in power were covered. The experimental data (spectra, attenuation factors, and spectral indices) have been compared with the calculation results. The sensitivity to parameters of calculation model and method was evaluated also.

Keywords:
space-energy neutron distribution, photon distribution, reactor pressure vessel, surveillance specimens, WWER-1000 mock-up, LR-0 research reactor

Paper ID: JAI13481
DOI: 10.1520/JAI13481
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