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Tungsten is a candidate material for the plasma facing components (PFC) of the divertor and baffle of the International thermonuclear experimental reactor (ITER) device. Three-dimensional neutronic modelling of the ITER divertor has been performed using the Monte Carlo code TRIPOLI. The divertor cassette was divided into nodes, chosen according to the nuclear properties and materials of the components with an heterogeneous representation of the PFC. FISPACT-FENDL/A-2.0 inventory calculations, with effective cross-section replacement for all tungsten absorption channels, modelled the activation responses. It is shown that a factor of up to 3 overestimation in tungsten decay heat has been predicted previously using homogeneous modelling and no effective cross-section correction. Three dimensional Monte Carlo benchmarking proves the importance of the transport cross-section data and methods by leading to a satisfactory agreement in spectral data. Activation cross-section, decay libraries and activation code can still yield different results but only for a reduced set of isotopes.

Additional information

Authors: SUBLET J-C, AEA Fusion, Culham Laboratory, Abingdon, Oxon (GB)
Bibliographic Reference: Report: UKAEA FUS 368 EN (1997) 56 pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon, OX14 3DB (GB)
Record Number: 199711294 / Last updated on: 1997-10-10
Original language: en
Available languages: en