STP1228: Analysis of PWR Pressure Vessel Surveillance Dosimetry with McBend

    de Wouters, RM
    Neutronics Group Manager and engineer, Tractebel Energy Engineering,

    Laurent, DJ
    Neutronics Group Manager and engineer, Tractebel Energy Engineering,

    D'Hondt, PJ
    Head of Fuel Research Division, CEN-SCK,

    Pages: 9    Published: Jan 1994


    Abstract

    Fast fluences received by four surveillance capsules in two 900-MWe PWR have been calculated with the Monte Carlo transport program MCBEND and compared with values estimated from activation measurements. First comparisons between calculation (C) and experiment (E) gave C/E values equal to 0.98/0.97/0.98/0.90. The original experimental values were based on saturation activation rates obtained from the measured activities and from the reactor power history, assigning at each operation cycle a contribution proportionnal to its time-integrated power production. A revision was then carried out in order to inlcude the effects of the fuel loadings (low leakage or out-in) in the contribution of each cycle. The revised experimental values led to C/E equal to 0.98/1.00/1.00/0.99, thus considerably reducing the scatter, and confirming the suitability of MCBEND to provide an essentially unbiassed approximation of the fast flux at the level of the surveillance capsules.

    Keywords:

    light water reactor, pressure vessel, surveillance, fast fluence


    Paper ID: STP15104S

    Committee/Subcommittee: E10.01

    DOI: 10.1520/STP15104S


    CrossRef ASTM International is a member of CrossRef.