Protection against large commercial aircraft crash is a new design requirement for international advanced nuclear power plants, and gradually becomes one of important advance characteristics. The study follows the principle of balance of safety, economy, and mature achievable engineering technology, conducted by design extension condition and realistic analysis inapplicable to single failure criterion, adopts Anti-Plane Crash (APC) shell protection + redundant features physical isolation to fulfill the safety acceptance criteria, and results in the HPR1000 design scheme withdraw large commercial aircraft crash. Beside the overall analysis on the impact effects of global structure, local structure, vibration and fuel, the study optimizes the design of each outside openings beyond personnel access size in APC shell to limit the mechanical damage of equipment due to local penetration and induced internal fire or explosion by leaking or pouring oil, by the design or construction scheme such as removable walls, protection covers, anti-aircraft gate, manway relocation, concrete second-pouring, and etc. In addition, the study also analyzes the hazard consequence of impact without APC shell protection, especially the influence of the safety structures or equipment damage of other safety buildings (e.g. nuclear auxiliary building) and induced fire spreading or flooding, to ensure the acceptance criteria of integrity of containment and spent fuel pool, or the cooling ability of reactor core and spent fuel pool. This outcome of the study enhances the safety and capability against external extreme hazards of HPR1000, and strengthens the public confidence on nuclear safety and anti-terrorism.

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