Design and Seismic Analysis of the Large Biological Shielding Door in Nuclear/Fusion Reactor

The large biological shielding door is the important protective equipment of nuclear/fusion reactor. Considering the seismic load and the gravity, it is designed. Based on the modal theory, the modal analysis is performed to obtain the natural frequency and the vibration modes of the door. Using the response spectrum method, the seismic analysis is performed to obtain the stress and displacement. Results show that the biological shielding door can meet the requirement of ASME and the design is reasonable and feasible; the horizontal acceleration being perpendicular to the door leaf is the major factor for the design of the door.