CAJ | 학술논문

目的建立船用压水堆核泄漏事故工作舱室辐射场实时绝对分布的研究方法.方法通过分析船用压水堆运行规律、辐射源项与释放机理,研究船用压水堆变工况运行条件下堆芯主要放射性核素积存量计算方法,进而利用核动力船舶内131I探测装置实时监测数据建立工作舱室辐射场实时绝对分布确定方法.结果利用Matlab软件建立了船用压水堆变工况运行条件下堆芯主要放射性核素积存量以运行功率和运行时间为变量的最小二乘法拟合函数,初步确定了船用压水堆核泄漏事故工作舱室辐射场实时绝对分布确定流程,船用压水堆变工况运行条件下堆芯主要放射性核素积存量与运行功率、运行时间的函数拟合值与真实值的拟合度可达到95％以上.结论所建立的船用压水堆核泄漏事故工作舱室辐射场实时绝对分布技术方法,可将船上相关装置设置输入接口,并可实现船用压水堆核泄漏事故工作舱室船员剂量即时快速估算,对船用压水堆核泄漏事故应急救援意义重大.
목적 건립선용압수퇴핵설루사고공작창실복사장실시절대분포적연구방법.방법 통과분석선용압수퇴운행규률、복사원항여석방궤리,연구선용압수퇴변공황운행조건하퇴심주요방사성핵소적존량계산방법,진이이용핵동력선박내131I탐측장치실시감측수거건립공작창실복사장실시절대분포학정방법.결과 이용Matlab연건건립료선용압수퇴변공황운행조건하퇴심주요방사성핵소적존량이운행공솔화운행시간위변량적최소이승법의합함수,초보학정료선용압수퇴핵설루사고공작창실복사장실시절대분포학정류정,선용압수퇴변공황운행조건하퇴심주요방사성핵소적존량여운행공솔、운행시간적함수의합치여진실치적의합도가체도95％이상.결론 소건립적선용압수퇴핵설루사고공작창실복사장실시절대분포기술방법,가장선상상관장치설치수입접구,병가실현선용압수퇴핵설루사고공작창실선원제량즉시쾌속고산,대선용압수퇴핵설루사고응급구원의의중대.
Objective To establish the method of real-time absolute distribution of the radiation field in the work cabins when radioactive leakage occurred involving the shipboard pressurized water reactor (PWR).Methods By analyzing operating modes of the shipboard PWR,radioactive source items and release mechanism,the calculation method for the determination of cumulative amount of main radionuclides in the PWR-core under variable conditions was investigated.Then,by using the real time monitoring data of the iodine-131 detection devices onboard the nuclear-powered ship,the method of radiation field absolute distribution in the work cabins was established.Results By using Matlab software kit,the least square fitting to the function in the accumulation quantity of the main radionuclides in the reactor core and operating power and running time was thus established,and the procedures for the real-time absolute distribution of the radiation field in the work cabins when radioactive leakage occurred were initially identified.The goodness-of-fit between the fitting value of function for the accumulation quantity of the main radionuclides in the reactor core and operating power and running time,and true fitting value reached over 95％ under variable operating conditions of the shipboard pressurized reactor core.Conclusions The determining procedures for the real-time absolute distribution of the radiation field in the work cabins on shipboard the PWR will facilitate input interface with the related device of the ship,and can help to realize instant and fast dose-estimation of the crew in case of radioactive leak accident.It is of great significance for the emergency rescue of the radioactive leak accident that might occur in the PWR on board the ship.