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  • Calculations to support JET neutron yield calibration : Modelling of the JET remote handling system
    Snoj, Luka, 1981- ...
    After the coated CFC wall to ITER-Like Wall (Beryllium/Tungsten/Carbon) transition in 20102011, confirmation of the neutron yield calibration will be ensured by direct measurements using a calibrated ... 252Cf neutron source deployed by the in-vessel remote handling boom and Mascot manipulator inside the JET vacuum vessel. Neutronic calculations are required to calculate the effects of the JET remote handling (RH) system on the neutron monitors. We developed a simplified geometrical computational model of the JET remote handling system in MCNP. In parallel we developed a script that translates the RH movement data to transformations of individual geometrical parts of the RH model in MCNP. After that a benchmarking of the model was performed to verify and validate the accordance of the target positions of source and RH system with the ones from our model. In the last phase we placed the JET RH system in the simplified MCNP model of the JET tokamak and studied its effect on neutron monitor response for some example source positions and boom configurations. As the correction factors due to presence of the JET RH system can potentially be significant in cases when the boom is blocking a port close to the detector under investigation, we have chosen boom configurations so that this is avoided in the vast majority of the source locations. Examples are given.
    Source: Nuclear Engineering and Design : international journal devoted to the thermal, mechanical and structural problems of nuclear energy. - ISSN 0029-5493 (Vol. 261, 2013, str. 244-250)
    Type of material - article, component part
    Publish date - 2013
    Language - english
    COBISS.SI-ID - 26907943

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