嵌套帕累托图及鱼骨图分析测氡仪检定中不合格项及原因  

Analysis of Unqualified Items and Reasons in the Verification of Radon Measuring Instrument by Nested Pareto Chart and Fishbone Diagram

作　　者：杜晓立[1] 齐永青 唐晓川[1] 刘姗姗[1] DU Xiaoli;QI Yongqing;TANG Xiaochuan;LIU Shanshan(Airborne Survey and Remote Sensing Center of Nuclear Industry,Metrology and Testing Department,Shijiazhuang 050002,China)

机构地区：[1]核工业航测遥感中心计量检测院,石家庄050002

出　　处：《核电子学与探测技术》2024年第3期587-593,共7页Nuclear Electronics & Detection Technology

摘　　要：测氡仪检定合格率相对其他放射性测量仪器来说,偏低一些。为探索各类测氡仪共性的不合格项及影响因素,进而为仪器生产厂家改进和用户使用保养提供建议,最终提高测氡仪检定的合格率,本文从计量机构的优势出发,对近5年的检定数据进行统计,采用统计分析中的嵌套帕累托图,分析影响测氡仪检定合格率的主要项目,针对主要项目深入剖析,分析主要项目中的关键因素,结合上述分析结果及鱼骨图,指出造成测氡仪检定合格率低的关键因素及对策措施。从分析结果可以得出,瞬时测氡仪检定的最主要不合格项是外观和标识,其主要影响因素是土壤采样罐漏气,而连续测氡仪检定的主要不合格项是体积活度响应,主要影响因素是体积活度响应年偏离量偏大,对于测氡仪检定不合格项可从加强人员培训、技术改进及提高零部件质量3个方面进行改善。通过本次统计分析,找出测氡仪检定中不合格项的主要因素并给出合理改进建议,有助于仪器生产厂家、计量技术机构及仪器用户三方协作,从而提高测氡仪检定的合格率,对测氡仪的改进与发展起到积极促进作用。The qualification rate of radon measuring instrument is lower than that of other radiometric instruments.In order to explore the common unqualified items and influencing factors,provide suggestions for the improvement of instrument manufacturers and the use and maintenance of users,and finally improve the qualification rate of radon measuring instrument verification,this paper,starting from the advantages of metrology station,makes statistics on the verification data in recent 5 years,adopts nested Pareto chart in statistical analysis,analyzes the key items that affect the qualification rate of radon measuring instrument verification,and makes in-depth analysis on the key items,analyze key factors in key projects.The key factors causing the low qualification rate of radon measuring instrument and the countermeasures are pointed out.From the analysis results and the fishbone diagram,it can be concluded that the main items and main factors,influential factors and minor factors that affect the verificatio qualification rate of radon measuring instrument.The main unqualified item in the verification of instantaneous radon measuring instrument is“appearance and identification”.The main influencing factor is the leakage of soil sampling tank,while the main unqualified item in the verification of continuous radon measuring instrument is the corresponding volume activity.The main influencing factor is that the annual deviation of volume activity response is too large.Focus on major unqualified items,but do not ignore the role of minor unqualified items.Major and minor unqualified items can be transformed into each other.The unqualified items of radon measuring instrument can be improved by strengthening training and technical improvement.Through statistical analysis,finding out the main factors of unqualified items in the verification of radon measuring instrument,and putting forward reasonable suggestions for improvement will help to improve the qualified rate of radon measuring instrument verification,promote trila

关 键 词：帕累托图 鱼骨图 测氡仪 检定 

分 类 号：TL8[核科学技术—核技术及应用]