Performance Testing and Validation Plan for HMS4 Quantitative Gamma Measurements, K-25/K-27 D&D Project, East Tennessee Technology Park, Oak Ridge, Tennessee

Thiesing, J. W. ; Donohoue, Tom ; McCague, Jim ; Martin, Ray ; Royce, Ralph ; Thomas, Troy

关键词: ALGORITHMS;    ATTENUATION;    BACKGROUND RADIATION;    CALIBRATION;    CORRECTIONS;    DETECTION;    EFFICIENCY;    OAK RIDGE;    PERFORMANCE TESTING;    COMPUTERIZED SIMULATION;    SODIUM IODIDES;    SPECTROMETERS;    TENNESSEE;    THALLIUM;    URANIUM ISOTOPES;    URANIUM 235;    VALIDATION P;    HMS4;    Quantitative Gamma Measurements;    K-25/K-27 D&D;   

DOI  :  10.2172/949979
RP-ID  :  BJC/OR-2930/R1
PID  :  OSTI ID: 949979
Others  :  TRN: US201002%%1452

美国|英语

来源: SciTech Connect

【 摘 要 】

The Holdup Measurement System 4 (HMS4) is a portable thallium activated sodium iodide (NaI[Tl]) gamma ray energy spectrometer that, when properly calibrated, is able to make quantifiable assessment of U-235 holdup in the presence of other uranium isotopes and prevailing background radiation. The use and calibration of the HMS4 is based upon the methodologies defined by Russo in La-14206, (Russo 2005), where detection efficiency determination protocols are defined (called Generalized Geometry Holdup [GGH]). The GGH methodology together with attenuation correction algorithms and other modeling parameters are combined in the HMS4 software package to provide a comprehensive tool for conducting in situ gamma-ray measurements. The fundamental principles of these capabilities are discussed.