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Non Destructive Assay (NDA) techniques have become more and more important in nuclear material accountancy and control. This is essentially due to two reasons: 1) the improvements made in most NDA techniques have led to some performances close to DA (eg calorimetry, gamma-spectrometry); 2) the parallel improvement of statistical tools and procedural inspection approaches, i.e. NDA for semi-qualitative or consistency checks only and DA for quantitative measurements. NDA is now frequently used in scenarios that involve quantitative (by "variable") analysis. It is evident that the performance of some techniques is different in the laboratory and in the field.

Additional information

Authors: GUARDINI S, JRC Ispra (IT)
Bibliographic Reference: Paper presented: ANS Winter Meeting, San Francisco (US), Nov. 26-30, 1989
Availability: Available from (1) as Paper EN 35109 ORA
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