Calculation of Minimum-Detectable-Concentration Levels of Radioxenon Isotopes Using the PNNL ARSA System

McIntyre, Justin I. ; Bowyer, Ted W. ; Reeder, Paul L.

Pacific Northwest National Laboratory (U.S.)

关键词: Radiation Monitors;    98 Nuclear Disarmament, Safeguards, And Physical Protection;    46 Instrumentation Related To Nuclear Science And Technology;    Beta Detection;    Monitoring;   

DOI  :  10.2172/888707
RP-ID  :  PNNL-13102
RP-ID  :  AC05-76RL01830
RP-ID  :  888707

美国|英语

来源: UNT Digital Library

【 摘 要 】

Measurement of xenon fission product isotopes is a key element in the global network being established to monitor the Comprehensive Nuclear-Test-Ban Treaty. The automated Radio-xenon Analyzer/Sampler (ARSA), built by Pacific Northwest National Laboratory, can detect 131mXe, 133mXe, 133Xe, and 135Xe via a beta-gamma counting system. Due to the variable background and sources of these four radio-xenon isotopes, it is important to have as sensitive a detection system as possible and to quantify the Minimum-Detectable-Concentrations (MDC) that such a system will be able to detect to preclude false negative and false positive results. From data obtained from IAR in Germany MDC values for 133Xe were well below the 1 mBq/SCMA as required by the PTS for the Comprehensive Test BAn Treaty [WGB TL-11,1999].