Containment sump filter and filter cartridge structure thereof

Abstract

The embodiment of the invention discloses a cartridge filter structure of a containment sump filter, which comprises at least two groups of filtering members, wherein each group of filtering members includes an inner-layer filter screen and an outer-layer filter screen, the top between the inner-layer filter screen and the outer-layer filter screen is closed, the bottom of the inner-layer filter screen is closed, an annular space is formed between the inner-layer filter screen and the outer-layer filter screen, and a filter cartridge is in a multi-layer filtering structure mainly formed by the nesting of the filtering members. The embodiment of the invention also discloses a containment sump filter. Because the cartridge filter is in a multi-layer filtering structure formed by the nesting of multiple groups of filtering members, bigger impact of an external liquid can be borne by using the filter cartridge structure for the containment sump filter and the containment sump filter and the filter cartridge structure thereof, and better overall strength and earthquake resistance can be achieved.

Description

technical field [0001] The invention relates to a safety system of a pressurized water reactor nuclear power plant, in particular to a filter cartridge structure for a containment pit filter used in a pressurized water reactor nuclear power plant and the containment pit filter. Background technique [0002] The pit located at the bottom of the containment vessel of the pressurized water reactor nuclear power plant is used to collect the coolant from the primary circuit in case of major leakage. After a basic accident such as a loss of coolant accident (LOCA) or a main steam line rupture accident (MSLB) in a pressurized water reactor nuclear power plant, the coolant enters the containment pit through the breach, and the coolant will be filtered through the containment pit filter , and then enter the Safety Injection System (RIS) and the Containment Spray System (EAS) through the pump device, and then used for reactor cooling to avoid serious damage to the core and overpressur...

AI Technical Summary

Problems solved by technology

[0005] In addition, the existing filter cartridges are not designed with enough reinforcement structures, and cannot withstand the impact of large-flow coolant during implementation, and the overall strength and shock resistance are not ideal.

Images