Stochastic Modeling of Radioactive Material Releases

Andrus, Jason¹  Pope, Chad¹ 

[1] Idaho National Lab. (INL), Idaho Falls, ID (United States)

关键词: RADIATION DOSES;    HAZARDS;    S CODES;    RADIOACTIVE MATERIALS;    STOCHASTIC PROCESSES;    EVALUATION;    RADIATION DOSE DISTRIBUTIONS;    NUCLEAR FACILITIES;    COMPUTERIZED SIMULATION;    DECISION MAKING;    RANDOMNESS;    RADIATION ACCIDENTS radioactive material release;    stochastic modeling;   

DOI  :  10.2172/1236799
RP-ID  :  INL/EXT--15-36669
PID  :  OSTI ID: 1236799
Others  :  TRN: US1600268

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Nonreactor nuclear facilities operated under the approval authority of the U.S. Department of Energy use unmitigated hazard evaluations to determine if potential radiological doses associated with design basis events challenge or exceed dose evaluation guidelines. Unmitigated design basis events that sufficiently challenge dose evaluation guidelines or exceed the guidelines for members of the public or workers, merit selection of safety structures, systems, or components or other controls to prevent or mitigate the hazard. Idaho State University, in collaboration with Idaho National Laboratory, has developed a portable and simple to use software application called SODA (Stochastic Objective Decision-Aide) that stochastically calculates the radiation dose associated with hypothetical radiological material release scenarios. Rather than producing a point estimate of the dose, SODA produces a dose distribution result to allow a deeper understanding of the dose potential. SODA allows users to select the distribution type and parameter values for all of the input variables used to perform the dose calculation. SODA then randomly samples each distribution input variable and calculates the overall resulting dose distribution. In cases where an input variable distribution is unknown, a traditional single point value can be used. SODA was developed using the MATLAB coding framework. The software application has a graphical user input. SODA can be installed on both Windows and Mac computers and does not require MATLAB to function. SODA provides improved risk understanding leading to better informed decision making associated with establishing nuclear facility material-at-risk limits and safety structure, system, or component selection. It is important to note that SODA does not replace or compete with codes such as MACCS or RSAC, rather it is viewed as an easy to use supplemental tool to help improve risk understanding and support better informed decisions. The work was funded through a grant from the DOE Nuclear Safety Research and Development Program.