New simulation capability for gamma ray mirror experiments

Descalle, Marie-Anne¹  Ruz-Armendariz, Jaime¹  Decker, Todd¹  Brejhnolt, Nicolai¹  Pivovaroff, Michael¹ 

[1]Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

关键词: SPENT FUELS;    SIMULATION;    GAMMA RADIATION;    PLUTONIUM 240;    AMERICIUM;    PLUTONIUM;    URANIUM;    DATA ANALYSIS;    FUEL PLATES;    FUEL RODS;    MIRRORS;    KEV RANGE;    CONFIGURATION;    DESIGN;    EMISSION SPECTRA;    OPTICS;    SAFEGUARDS;   

DOI  :  10.2172/1240928
RP-ID  :  LLNL--TR-677932
PID  :  OSTI ID: 1240928
Others  :  TRN: US1600690

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来源: SciTech Connect

【 摘 要 】

This report provides a description of the simulation toolkit developed at Lawrence Livermore National Laboratory to support the design of nuclear safeguards experiments using grazing incidence multilayer mirrors in the energy band of uranium (U) and plutonium (Pu) emission lines. This effort was motivated by the data analysis of a scoping experiment at the Irradiated Fuels Examination Facility (IFEL) at Oak Ridge National Laboratory in FY13 and of a benchmark experiment at the Idaho National Laboratory (INL) in FY14 that highlighted the need for predictive tools built around a ray-tracing capability. This report presents the simulation toolkit and relevant results such as the simulated spectra for TMI, MOX, and ATM106 fuel rods based on spent fuel models provided by Los Alamos National Laboratory and for a virgin high ²⁴⁰Pu-content fuel plate, as well as models of the IFEL and INL experiments implemented in the ray tracing tool. The beam position and height were validated against the INL ~60 keV americium data. Examples of alternate configurations of the optics or experimental set-up illustrate the future use of the simulation suite to guide the next IFEL experimental campaign.