What are the basic assumptions of accident analysis?

Four basic assumptions of accident analysis: 1) loss of off-site power supply.

2) A group of control rods with the maximum value is stuck in the full pumping position.

3) Only consider the accident mitigation function of safety equipment, and only consider its unfavorable factors for accidents for non-safety equipment.

4) It is necessary to assume the limit of a single fault.

Potential hazards of nuclear power plants: 1) There are a lot of radioactive materials in nuclear power plants.

Decay heat will be released for a long time after reactor shutdown.

3) There is a lot of high temperature and high pressure water in the reactor.

4) The reactor power may increase rapidly.

Features: tangible output of safety culture and innovative spirit of safety culture.

Essence: Establish a set of scientific and strict rules and regulations and organizational system in the power plant, create an atmosphere in which everyone consciously pays attention to safety in the nuclear power plant, improve employees' knowledge and skills through training, and cultivate employees' awareness of obeying rules and discipline and good work habits, thus improving personnel performance and safety performance of the nuclear power plant.

Monitoring: refers to two operators checking the correctness of the operation to be carried out at the same time.

Methods of safety culture assessment: personnel interview, behavior observation and document review.

China's nuclear safety laws and regulations system can be divided into: national laws, the State Council administrative regulations, departmental regulations, guidance documents and reference documents.

Nuclear power safety license: nuclear power plant site safety review safety license, nuclear power plant construction license, nuclear power plant first charging license, nuclear power plant operation license, nuclear power plant decommissioning license, operator license and senior operator license.