TAILIEUCHUNG - Nuclear Power Operation Safety and Environment Part 3

Tham khảo tài liệu 'nuclear power operation safety and environment part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | LWR Safety Analysis and Licensing and Implications for Advanced Reactors 49 1996 . The role of each safety level can be clearly seen in the table. One desirable effect of the defense in depth concept is that the plant that adopts it tends to be more resilient to failures. Fig. 1. General Brazilian licensing process Level Objective Essential means 1 Prevention of abnormal operation and or failures Conservative design High quality in construction operation 2 Control of abnormal operation and detection of failures protection Control systems Limiting systems Protection systems 3 Accident control within design basis protection Engineered safety features Accident procedures 4 Control of severe plant conditions protection Complementary measures Accident management 5 Mitigation of radiological consequences of significant radioactive releases Off-site emergency response Table 1. Objectives and essential means of the defense in depth approach IAEA 1996 50 Nuclear Power - Operation Safety and Environment 4. Accident analysis The construction and operation of nuclear power plants requires the submission of a safety analysis report which must contain an analysis of a wide range of conceivable abnormal events. The purpose is to demonstrate that the project provides a means to control these events or otherwise accommodate their consequences without undue risk to health and safety of the public. Analyzed conditions include a small transients that occur with moderate frequency and represent minor hazards b unlikely accident situations that can have serious consequences and therefore require different measures to protect the public. Safety analysis is concerned with the potential effects of every conceivable or anticipated transient that may occur as a result of a operational malfunctions . human errors or small instrumentation or other equipment failures or b serious mechanical failures of different types. Transients of moderate frequency can result from operational occurrences

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