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This paper describes the first attempt to calculate the parameters for 238U and 232Th used in the analysis of delayed neutron counter measurements of the total neutron yield from D-T plasmas; the nuclear theory of systematics is employed, together with nuclear data from the literature. As a check on the methods used, the delayed neutron parameters were also calculated for D-D plasma conditions; the resulting neutron yields agreed within +/- 7% with the results obtained using the experimentally calibrated delayed neutron counter assemblies. After the calculations were completed, the first D-T plasma experiment was performed at JET. Delayed neutron measurements were made using 232Th samples. The delayed neutron parameters calculated in this work gave neutron yields that agreed within +/-8% with those obtained with conventional activation methods, using iron and silicon samples.

Additional information

Authors: ANGELONE M, ENEA, Centro Richerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: JET-P(92)28 EN (1992) 25 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199211183 / Last updated on: 1994-11-29
Original language: en
Available languages: en
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