Community Research and Development Information Service - CORDIS

Abstract

Gamma scanning is one of the most widely used non-destructive assay techniques for routine quality checking of radioactive waste drums. The result of gamma scanning measurements is strongly influenced by the gamma attenuation in the waste matrix.

In the case of heterogeneous activity and/or matrix distribution, uncertainties will be introduced when applying standard correction procedures that can lead to significant errors in the activity determination especially for medium and high density waste combined with low and medium gamma-ray energies.

The main objective of the R & D project was to develop and test methods that will decrease systematic uncertainties and bias, caused by a lack of information on the activity and matrix distribution, by taking into account the relevant characteristics of the waste package under inspection.

A modelling software (SOLIDANG) was developed for calculation of the detection efficiency of 'standard' gamma scanning systems which helped to design, evaluate and optimize new scanning techniques. Validation of the simulation software has proven that SOLIDANG can be used as an efficient tool for performance evaluation and optimization of gamma assay techniques. ques.

Additional information

Authors: SANDEN H J, FZJ (DE);GASPARY G, FZJ (DE);BRUGGEMAN M, SCK-CEN (BE);VELZEN L, NRG (NL);LEWIS A, NNC/WQCL (GB);PINA G, CIEMAT (ES);VICINI C, ANPA (IT);REMETTI R, University of Rome (IT);BUCHERL T, TUM/RCM (DE)
Bibliographic Reference: EUR 19127 EN (1999), 149pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-8186-5
Record Number: 199911760 / Last updated on: 2000-01-30
Category: PUBLICATION
Original language: en
Available languages: en
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