Reactor pressure vessel and Reactor containment It belongs to special container structure. The container structure can be built underground, semi underground or on the ground, or can be erected in the air. In addition to the dead weight, the load of the vessel structure is mainly the pressure of the stored medium, and other factors must be considered. Such as oil tank for storing crude oil and heavy oil. In order to facilitate transportation, oil products are generally heated to a certain temperature; The reactor pressure vessel shall be able to withstand high temperature and pressure; Therefore, the influence of temperature stress should be considered for such vessels. For underground or semi underground container structures, the effect of earth pressure and groundwater pressure should also be considered.
Radiation shielding requirements must be considered for the reactor containment to prevent radioactive substances from polluting the environment in case of reactor accidents, and to protect the reactor from external adverse factors.
The cross section of the pressure bearing vessel structure is mostly circular, and the high pressure vessel is often made into a sphere in order to bear reasonable force and save materials. The container structure can be constructed of masonry (or reinforced), steel, reinforced concrete and other materials. Steel structures are generally used for gas storage tanks, aboveground oil tanks and reactor pressure vessels; While underground oil tanks, pools, silos and Reactor containment Reinforced concrete structure or prestressed concrete Structure. For reinforced concrete structures with airtight or anti-seepage requirements, their wallboards and baseplates shall be poured on site. When the wallboards are high Sliding formwork Construction. Independent circular containers, such as the wall panels of reinforced concrete oil tanks, can also be prefabricated vertically Reinforced concrete slab Assembling, wrapping prestressed steel wire outside the wall, and then spraying cement mortar protective layer. The container structure with large volume has the characteristics of wide land occupation, large load and sometimes uneven loading rate Big features. Therefore, there is a high requirement for the foundation to avoid uneven settlement and prevent the container from deformation or cracking. When building large and medium-sized container structures on soft foundation, the foundation must be properly treated, and the loading rate must be controlled at the initial stage of use to avoid shear failure of the foundation.
