Verification of the VVER-440 pressure vessel neutron fluence calculation by activity measurement

To qualify the calculation methodology, measurements of neutron flux responses of a VVER-440/230 reactor pressure vessel have been carried out. The activity of shavings sampled out from the inner pressure vessel wall of Unit 1 of Kozloduy NPP after the 14th cycle has been measured. Calculation of th...

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Bibliographic Details
Published in:Nuclear engineering and design 1996-02, Vol.160 (1), p.257-260
Main Authors: Ilieva, Krassimira, Apostolov, Tihomir, Penev, Ivan, Belousov, Sergey, Taskaev, Evgeny, Antonov, Stoyan, Petrova, Temenuga, Tzokov, Petjo, Bojadjiev, Zahari
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Installations for energy generation and conversion: thermal and electrical energy
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Summary:To qualify the calculation methodology, measurements of neutron flux responses of a VVER-440/230 reactor pressure vessel have been carried out. The activity of shavings sampled out from the inner pressure vessel wall of Unit 1 of Kozloduy NPP after the 14th cycle has been measured. Calculation of the expected activity at the shaving positions has been carried out, taking into account the local power distribution. Comparison of calculated and measured activity values has indicated that the computed value for the fast neutron fluence is underestimated by up to 20%.
ISSN:0029-5493
1872-759X
DOI:10.1016/0029-5493(95)01102-1