Filter system for built-in containment refueling water storage tank

Abstract

The invention discloses a filter system for a built-in containment refueling water storage tank, which comprises disintegrating slag trash rack arranged above a hole of an upper floor of the built-in containment refueling water storage tank, a disintegrating slag detention basket is arranged in the built-in containment refueling water storage tank below the hole of the upper floor, an opening at the upper part of the disintegrating slag detention basket is higher than the highest liquid level of liquid in the built-in containment refueling water storage tank and aims at the hole of the upper floor on the in-containment refueling water storage tank, the disintegrating slag detention basket and a pumping inlet filter are independently arranged or are connected with each other through a fixing device in the built-in containment refueling water storage tank, and the disintegrating slag trash rack, the disintegrating detention basket and the pumping inlet filter form a three-level filter system. The system occupies a relatively small area, is more flexible in arrangement and high in filter efficiency, does not need a large-area space, and is also suitable for an underwater environment such as the built-in containment refueling water storage tank.

Description

technical field [0001] The invention relates to a safety system of a nuclear power plant, in particular to a filter system for a refueling water tank built in a containment. Background technique [0002] When accidents such as LOCA or main steam pipeline rupture occur in the containment of a nuclear power plant, the high-energy pipeline in the containment ruptures, and the discharge force of the breach medium will impact the surrounding insulation materials, civil structures, equipment paint, and other substances. If the debris is transferred to the pool at the entrance of the safety injection spraying and safety spraying system (such as the pit in the second-generation pressurized water reactor unit, the third-generation pressurized water reactor unit built-in refueling water tank IRWST) and deposits on the filter set inside it, the accumulation of debris on the filter will cause an increase in the pressure drop of the debris layer, which may lead to the safety injection sy...

AI Technical Summary

Problems solved by technology

Therefore, the arrangement of traditional filters needs to occupy a considerable space. Taking the second-generation pressurized water reactor nuclear power plant as an example, the arrangement of pit filters occupies half of the ring corridor area

At the same time, because the flow area is too large, there are more particles and fibers passing through the filter, which may affect the heat export of the reactor core.

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