Performance values for non destructive
assay (nda) techniques applied to safeguards:the 2002 evaluation
by the esarda nda working group
Olga
Mafra et al.
Edited by: S. Guardini EC-JRC-IPSC,
Ispra (I)
The first evaluation of NDA performance values undertaken
be the ESARDA Working Group for Standards and Non Destructive
Assay Techniques (WGNDA) was published in 1993. Almost 10
years late the Working Group decided to review those values,
to report about improvements and to issue new performance
values for techniques which were not applied in the early
nineties, or were at that time only emerging.
Non-Destructive Assay techniques have become more and more
important in recent years, and they are used to a large extent
in nuclear material accountancy and control both by operators
and control authorities. As a consequence, the performance
evaluation for NDA techniques is of particular relevance
to safeguards authorities in optimizing Safeguards operations
and reducing costs.
Performance values are important also for NMAC regulators,
to define detection levels, limits for anomalies, goal quantities
and to negotiate basic audit rules.
This Paper present the latest evaluation of ESARDA Performance
Values (EPVs) for the most common NDA techniques currently
used for the assay of nuclear material for Safeguards purposes.
The main topics covered by the document are:
- Techniques for plutonium bearing materials: PuO 2 and
MOX;
- Techniques for U-bearing materials;
- Techniques for U and Pu in liquid form;
- Techniques for spent fuel assay.
This issue of the performance values is the result of specific
international round robin exercises, field measurements and
ad hoc experiments, evaluated and discussed in the ESARDA
NDA Working Group.
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