Reactor shielding, coolant pressure relief and containment suppression compound device

Abstract

The invention discloses a reactor shielding, coolant pressure relief and containment suppression compound device. The reactor shielding, coolant pressure relief and containment suppression compound device comprises a ring-shaped shielding layer which is arranged in a containment, surrounds a pressure vessel and adopts a closed structure, the housing of the ring-shaped shielding layer comprises shielding steel plates, and the ring-shaped shielding layer accommodates shielding water and is provided with a suppression pipeline used for communication between the atmosphere of the containment and the shielding water, and the ring-shaped shielding layer is also provided with a pressure relief pipeline used for leading a coolant in the pressure vessel into the shielding water and a water drainage pipe used for discharging water into a reactor cavity. The reactor shielding, coolant pressure relief and containment suppression compound device can achieve the functions of reactor shielding, coolant pressure relief, containment suppression and water discharge into the reactor cavity.

Description

technical field [0001] The present invention relates to shielding structures surrounding reactor pressure vessels (RPVs), and more particularly to a composite device with reactor shielding, coolant depressurization and containment containment suppression. Background technique [0002] In commercial pressurized water reactor nuclear power plants, the shielding around the reactor pressure vessel (RPV) is basically a concrete structure. Reactor shielding reduces all types of nuclear radiation from the reactor source and prevents excessive activation of components and structures outside the concrete shield by reducing the neutron fluence rate from the core. In the design of reactor shielding for ships, steel-water hybrid structures or other structures (such as doping heavy metals or neutron-absorbing composite materials, etc.) are also used. [0003] In the reactor design with a small containment, although the reactor shield can be designed with conventional concrete, in order ...

AI Technical Summary

Problems solved by technology

[0004] For PWRs, the containment capacity of the containment to accommodate the release of mass energy after an accident is relatively small, and secondly, a large water pool for coolant depressurization and containment suppression cannot be arranged separately in the containment

Also, in the event of a pipe break leading to coolant blowout (LOCA) accident, the reactor cavity needs to be flooded and the breach site covered, but the water source may not be sufficient

[0005] Since most commercial PWRs are large dry containment vessels, there is little precedent for this design

For naval PWRs, although steel-water structure shielding may be arranged, less consideration may be given to coolant depressurization and containment depressurization.

Images