Hazard Identification on the Process of High-Level Liquid Waste Concentration and Denitration in Spent Fuel Reprocessing by HAZOP

Abstract To develop China’s spent nuclear fuel reprocessing, safety analysis of reprocessing facility is great importance and high priority. Any methodology analysis, no matter whether it in a kind deterministic probabilistic assessment or so-called Integrated Safety Analysis, beginning with the identification systematic hazards as very first essential step. Recognizing that facilities are, to large extent, chemical processing plants, HAZard OPerability (HAZOP) was introduced firstly US. It featured one most suitable methods for performing detailed wide range hazards. In this paper, our work on part concentration denitration process (C/D process) high-level liquid waste (HLLW) revealed exemplify procedure hazard typical process, C/D HLLW has many symbolic features such radiation, various chemicals, complex reactions operation stages. The purpose paper test applicability HAZOP reprocessing. approach starting identifications reactions, equipment, system borders. Base given (part), specific elements guidewords were selected combined generate deviations different possible causes consequences deviation well existing safeguards taken into consideration. make workflow complete underscore its significance, 4-by-5 risk matrix established evaluate levels all resulted from deviations, based severity consequence associated likelihood occurrence. final results shown worksheet, which twenty-two presented, revealing potential found part. After preliminary using matrix, eight them recognized undesirable risks (only accepted when reduction impracticable). verified processes parts involved radiation facilities.