On-Site Inspection RadioIsotopic Spectroscopy (Osiris) System Development

Caffrey, Gus J.¹  Egger, Ann E.¹  Krebs, Kenneth M.¹  Milbrath, B. D.²  Jordan, D. V.²  Warren, G. A.²  Wilmer, N. G.³ 

[1] Idaho National Laboratory, Idaho Falls, ID (United States);Pacific Northwest National Lab. (PNNL), Richland, WA (United States);Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

关键词: IODINE 132;    GAMMA SPECTROMETERS;    GAMMA SPECTRA;    ON-SITE INSPECTION;    FISSION PRODUCTS;    CTBT;    FIELD TESTS;    NUCLEAR EXPLOSIONS;    PROGRAMMING;    COMPARATIVE EVALUATIONS;    UNDERGROUND EXPLOSIONS;    REACTOR ACCIDENTS;    DESIGN;    REACTOR ACCIDENTS;    DATA ANALYSIS;    DATA ACQUISITION;    PERFORMANCE TESTING;    ON-LINE MEASUREMENT SYSTEMS Comprehensive Nuclear-Test-Ban Treaty;    gamma-ray spectroscopy;    data filter;    gamma-ray spectral analysis;    fission-product spectral analysis;   

DOI  :  10.2172/1228080
RP-ID  :  INL/EXT--15-35557
PID  :  OSTI ID: 1228080
Others  :  TRN: US1600024

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来源: SciTech Connect

【 摘 要 】

We have designed and tested hardware and software for the acquisition and analysis of high-resolution gamma-ray spectra during on-site inspections under the Comprehensive Nuclear-Test-Ban Treaty (CTBT). The On-Site Inspection RadioIsotopic Spectroscopy???Osiris???software filters the spectral data to display only radioisotopic information relevant to CTBT on-site inspections, e.g.,132I. A set of over 100 fission-product spectra was employed for Osiris testing. These spectra were measured, where possible, or generated by modeling. The synthetic test spectral compositions include non-nuclear-explosion scenarios, e.g., a severe nuclear reactor accident, and nuclear-explosion scenarios such as a vented underground nuclear test. Comparing its computer-based analyses to expert visual analyses of the test spectra, Osiris correctly identifies CTBT-relevant fission product isotopes at the 95% level or better.The Osiris gamma-ray spectrometer is a mechanically-cooled, battery-powered ORTEC Transpec-100, chosen to avoid the need for liquid nitrogen during on-site inspections. The spectrometer was used successfully during the recent 2014 CTBT Integrated Field Exercise in Jordan. The spectrometer is controlled and the spectral data analyzed by a Panasonic Toughbook notebook computer. To date, software development has been the main focus of the Osiris project. In FY2016-17, we plan to modify the Osiris hardware, integrate the Osiris software and hardware, and conduct rigorous field tests to ensure that the Osiris system will function correctly during CTBT on-site inspections. The planned development will raise Osiris to technology readiness level TRL-8; transfer the Osiris technology to a commercial manufacturer, and demonstrate Osiris to potential CTBT on-site inspectors.