In-service Inspection of the AP1000 Reactor Vessel Head

According to Davis-Besse reactor pressure vessel head degradation,the degradation mechanism of PWR reactor vessel head and its penetrative components are discussed,and the improving methods for materials and structures of AP1000 reactor vessel head and penetrative components are outlined.Also,the in-service inspection method,inspection requirements,inspection personnel,inspection procedures,inspection equipments and acceptance criteria of AP1000 reactor vessel head and penetrative components are described in detail.