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The influence of core power distribution on neutron flux density behind a pressure vessel of a VVER-1000 Mock Up in LR-0 reactor

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KOŠŤÁL M. RYPAR V. LOSA E. HARUT D. SCHULC M. KLUPÁK V. MATĚJ Zdeněk CVACHOVEC František JÁNSKÝ B. NOVÁK E. CZAKOJ T. JUŘÍČEK V. ZARITSKY S.

Rok publikování 2018
Druh Článek v odborném periodiku
Časopis / Zdroj Applied Radiation and Isotopes
Fakulta / Pracoviště MU

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Citace
www https://www.sciencedirect.com/science/article/pii/S0969804318301921?via%3Dihub
Doi http://dx.doi.org/10.1016/j.apradiso.2018.09.005
Klíčová slova VVER-1000; Mock-Up; LR-0; Reactor dosimetry; Neutron spectrometry; RPV
Popis This paper compares the calculated and measured increase of the neutron flux density distribution behind the reactor pressure vessel in the azimuthal profile that has arisen from the replacement of 164 fuel pins located close to reactor internals by pins with the higher enrichment. This work can be understood as the first step in the characterization of the effect of incorrectly calculated pin power or burn-up in the fuel assembly at the core boundary relative to the neutron flux distribution behind reactor pressure vessel. Based on a good agreement between the calculated and experimental values, it can be concluded that the mathematical model used to evaluate the power increase is correct.