Method for evaluating similarity of nuclear system based on sensitivity space included angle

Abstract

The invention relates to a method for evaluating the similarity of a nuclear system based on a sensitivity space included angle. By adopting the method provided by the invention, a correction value of an included angle of the sensitivity vectors of the two nuclear systems in the space is calculated through the nuclear cross section sensitivity data, the relative covariance matrix data and the uncertainty caused by the nuclear cross section deviation, so that the similarity index of the two nuclear systems is obtained; and a quantitative judgment standard can be provided for the similarity of the two nuclear systems. According to the method, the similarity of the nuclear system is quantified by adopting a method for quantitatively evaluating the similarity of the nuclear system, a powerful basis can be provided for analyzing and screening critical reference experiment data, then the nuclear safety characteristics of the nuclear system are evaluated, the accuracy of nuclear safety evaluation work is improved, and help is provided for nuclear critical safety evaluation workers.

Description

technical field [0001] The invention belongs to the field of nuclear safety evaluation and relates to a method for evaluating nuclear system similarity based on sensitivity space angles. Background technique [0002] In GB 15146.1-2008 "Nuclear Criticality Safety of Fissile Materials Outside the Reactor Part 1: Administrative Regulations on Nuclear Criticality Safety", it is stipulated that "Criticality safety analysis and evaluation must be carried out to confirm that the entire operation process or the entire process flow is under normal conditions and Under credible abnormal conditions, they are all in a sub-critical safety state.” And this kind of analysis and evaluation work itself must also be evaluated whether it is suitable, especially the applicability and correctness of the calculation results obtained by using the calculation program must be based on the relevant criticality experiments. Based on the data, there must be relevant experimental criticality data for v...

AI Technical Summary

Problems solved by technology

There are many ways to judge the similarity between nuclear systems, but most of the methods currently used are to qualitatively judge the similarity of the systems with reference to factors such as fuel type, degree of moderation, poison arrangement, boundary conditions, etc., which will lead to no unified judgment Standards, subjective factors also have a great influence

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