Method for determining adverse working conditions in pressurized water reactor nuclear power plant accident strategy related containment

The invention belongs to the technical field of nuclear safety evaluation, and relates to a method for determining adverse working conditions in a containment related to accident strategies of a pressurized water reactor nuclear power plant. The determination method comprises the following steps: (1) dividing operation conditions; (2) judging whether the working condition can cause great change ofthe environmental condition of the containment vessel or not; (3) analyzing an event incorporated into the normal working condition of the containment vessel; (4) analyzing events incorporating the adverse working conditions of the containment vessel; (5) analyzing the influence of environmental conditions on the display precision of the instrument; and (6) analyzing environmental condition boundary values of the normal working condition and the adverse working condition in combination with instrument characteristics. By utilizing the method for determining the unfavorable working condition in the containment vessel