核临界事故报警系统布置分析方法研究

本文阐述了布置核临界事故报警系统的意义和原则,分析了核临界事故可能发生的机理,初步建立了一套核临界事故情景假设分析方法。研究了最小临界事故源项计算方法以及三维剂量场分布计数的方法,采用各设备最小临界事故剂量场分布最小值等高线图的方法来从众多剂量场分布图中优化选取合适的核临界事故报警系统布置点位,以确保其可以覆盖到每个具有核临界事故风险的设备,并对核临界事故报警系统探头类型选择的原则和方法进行了分析。

Research on layout method for nuclear criticality accident alarm system

This paper expounds the significance and principle of the layout of nuclear criticality accident alarm system in spent fuel reprocessing plant, analyzes the mechanism of potential nuclear criticality accident, and preliminarily establishes a set of scenario hypothesis analysis method for nuclear criticality accident. The calculation method of the source term of the minimum criticality accident and tallying of three-dimensional dose field distribution of equipment room is studied. The method of contour plot of the minimum criticality accident dose field distribution of all equipment is applied to optimize selecting the appropriate location of the nuclear criticality accident alarm system from many dose field distribution maps, so as to ensure that all equipment with nuclear criticality accident risk can be covered. The principle and specific method of probe type selection of the nuclear criticality accident alarm system are also analyzed.