Verification of the near real time accountancy data

Conference · Fri Jul 01 04:00:00 EDT 1983 · Nucl. Mater. Manage.; (United States)

OSTI ID:6899185

Avenhaus, R; Leitner, E

In previous papers it has been shown that under appropriate assumptions the optimal procedure for verifying the data and establishing the material balance of one inventory period is based on the MUF-D statistic, where MUF is the usual material balance test statistic and D is the algebraic sum of the differences of the operator's and of the inspector's measurements. In this paper we analyse the problem of verifying the data and establishing the material balances of a sequence of inventory periods. The authors determine that test procedure which is optimal in the sense of the overall probability of detecting a diversion of nuclear material. In so doing, the authors account for the internal consistencies of data falsification strategies, as they provide additional detection possibilities. The result of the analysis shows that the MUF-D statistic is no longer optimal, instead one arrives at a linear combination of MUF and D, weighted with appropriate variances, i.e. the Z-statistic introduced some years ago by J. Jaech. This is important for all Near-Real-Time Accountancy (NRTA) studies: Even though NRTA evaluation procedures are primarily developed in order to shorten the detection time, it is necessary to know the best test statistic from the probability of detection point of view in order to find an evaluation procedure which satisfies an acceptable compromise between these two criteria.

• Research Organization: Hochschule der Bundeswehr, Munchen
• OSTI ID: 6899185
• Report Number(s): CONF-830709-
• Conference Information: Journal Name: Nucl. Mater. Manage.; (United States) Journal Volume: 12
• Country of Publication: United States
• Language: English

Related Subjects

055001* -- Nuclear Fuels-- Safeguards
Inspection
& Accountability-- Technical Aspects
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
ACCOUNTING
ALARM SYSTEMS
DATA COVARIANCES
INFORMATION VALIDATION
INVENTORIES
MANAGEMENT
MATERIAL BALANCE
MATHEMATICS
MOTION DETECTION SYSTEMS
NUCLEAR MATERIALS DIVERSION
NUCLEAR MATERIALS MANAGEMENT
PERFORMANCE TESTING
PROBABILITY
REAL TIME SYSTEMS
STATISTICS
TESTING
VALIDATION