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This report, in three volumes, describes work carried out on the development of a radioactive waste package assay facility for cemented 500 litre intermediate level waste drums. Volume 2 of the report describes the theoretical and experimental work carried out on active neutron and active gamma interrogation of the drums. The design of a suitable neutron generating target in conjunction with a linac was established. Following theoretical predictions of likely neutron responses, an experimental assay assembly was built. Responses were measured for simulated drums of ILW, based on CAGR, Magnox and PCM wastes. Good correlations were established between quantities of 235U, natU and D(2)O contained in the drums, and the neutron signals. The neutron time spectra obtained during neutron interrogation were more complex than expected, and further analysis will be needed. Another discrepancy was the difference between predicted and measured thermal neutron flux in the drum. Clusters of small 3He proportional counters were found to be far superior for fast neutron detection than larger diameter counters.

Additional information

Authors: BAILEY M, Harwell Laboratory, Didcot, Oxon. (GB);BUNCE L J, Harwell Laboratory, Didcot, Oxon. (GB);FINDLAY D J S, Harwell Laboratory, Didcot, Oxon. (GB);JOLLY J E, Harwell Laboratory, Didcot, Oxon. (GB);PARSONS T V, Harwell Laboratory, Didcot, Oxon. (GB);SENE M R, Harwell Laboratory, Didcot, Oxon. (GB);SWINHOE M T, Harwell Laboratory, Didcot, Oxon. (GB)
Bibliographic Reference: EUR 13870 EN (1992) Vol. 2, 233 pp., FS, ECU 20
Availability: (2)
ISBN: ISBN 92-826-3635-6
Record Number: 199210323 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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