现代应用物理2026，Vol.17Issue(4)：86-91,6.DOI:10.12061/j.issn.2095-6223.202512003
基于CAD转CSG模型的蒸汽发生器主蒸汽管道16N探测效率计算方法研究
Study on the Calculation Method of 16N Detection Efficiency for Main Steam Pipes of Steam Generators Based on CAD-CSG Model Conversion
高新占 1黄金龙 1杜金健 1花锋 1李明旭1
作者信息
- 1. 西安中核核仪器股份有限公司,西安 710061
- 折叠
摘要
Abstract
As one of the key components of pressurized water reactor(PWR)nuclear power plants,the leakage of the steam generator is directly related to the operational safety of the nuclear power plant.The 16N monitor calculates the primary coolant leakage rate of the heat transfer tubes of the steam generator based on the activity concentration of 16N in the main steam pipeline,in combination with the input reactor power and its own detection efficiency.Due to the short half-life of 16N(only 7.13 s),it is difficult to measure the detection efficiency of the monitor through experiments.To address this issue,this paper establishes a 16N monitor detection efficiency calculation method based on the conversion of CAD models to CSG models.First,the 137Cs detection efficiency of the 16N monitor was obtained through both experimental measurement and Monte Carlo calculation.The results showed a relative deviation of 3.96％between the two methods,verifying the accuracy of the Monte Carlo approach for detection efficiency calculation.Then,based on the GEOUNED software,the CAD model of the main steam pipeline was converted into a CSG model.The detection efficiency of 16N calculated using Monte Carlo method was 3.12×10-5 s-1·(Bq·m-3)-1,which is higher than the engineering reference value 1.45×10-5 s-1·(Bq·m-3)-1.The 16N detection efficiency calculation method established in this paper provides important significance for the engineering application of 16N monitors.关键词
16N监测仪/主蒸汽管道/探测效率/GEOUNED/CAD模型Key words
16N monitor/main steam pipeline/detection efficiency/GEOUNED/CAD Model分类
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高新占,黄金龙,杜金健,花锋,李明旭..基于CAD转CSG模型的蒸汽发生器主蒸汽管道16N探测效率计算方法研究[J].现代应用物理,2026,17(4):86-91,6.
