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Conference Article: Analysis of the European Results on the HTTR’s Core Physics Benchmarks

X. Raepsaet, F. Damian, CEN Saclay, France, U. A. Ohlig, H. J. Brockmann, Research Centre Jülich, Germany, J. B. M. De Haas, NRG/Petten and E. M. Wallerboss, Interfaculty Reactor Institute, Delft, The Netherlands

Abstract

Within the frame of the European contract HTR-N1 calculations are performed on the benchmark problems of the HTTR’s start-up core physics experiments initially proposed by the IAEA in a Co-ordinated Research Programme. Three European partners, the FZJ in Germany, NRG and IRI in the Netherlands, and CEA in France, have joined this work package with the aim to validate their calculational methods. Pre-test and post-test calculational results, obtained by the partners, are compared with each other and with the experiment. Parts of the discrepancies between experiment and pre-test predictions are analysed and tackled by different treatments. In the case of the Monte Carlo code TRIPOLI4, used by CEA, the discrepancy between measurement and calculation at the first criticality is reduced to ?k/k ~ 0.85 %, when considering the revised data of the HTTR benchmark. In the case of the diffusion codes, this discrepancy is reduced to: ?k/k ~ 0.8 % (FZJ) and 2.7 or 1.8 % (CEA).

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key words: Gas Cooled Reactor, Nuclear Technology
Reference:
Proceedings of the Conference on High Temperature Reactors, Petten, NL, April 22-24, 2002
Organized by HTR-TN in cooperation with the European Nucler Society (ENS) and the IAEA
International Atomic Energy Agency, Vienna (Austria)
HTR-2002, pp:1-5