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Accurate measurement of the nuclear environment within a test tritium breeding-blanket module of a fusion reactor is crucial to determine tritium production rates which are relevant to self-sufficiency of tritium fuel supply, tritium accountancy and also to the evaluation of localised power levels produced in blankets. This requires evaluation of the time-dependent spectral neutron flux within the test tritium breeding-blanket module under harsh radiation and temperature environments. The application of an activation foil-based spectrometer system to determine neutron flux density using a pneumatic transfer system in ITER has been studied, deployed and tested on the Joint European Torus (JET) machine in a recent deuterium - deuterium campaign for a selection of high purity activation foils. Deployment of the spectrometer system has provided important functional and practical testing of the detector measurement …
Publication date: 
1 Nov 2018

Bethany Colling, P Batistoni, SC Bradnam, Z Ghani, MR Gilbert, CR Nobs, LW Packer, M Pillon, S Popovichev, JET Contributors

Biblio References: 
Volume: 136 Pages: 258-264
Fusion engineering and design