Containment filtering and discharging system capable of carrying out passive operation for a long term

Abstract

The invention provides a containment filtering and discharging system capable of carrying out a passive operation for a long term. The outlet pipeline of a prefilter in the containment is connected with one end of a containment isolating valve; the other end of the containment isolating valve is simultaneously connected with an active path and a passive path; the active path and the passive path are simultaneously connected with the inlet of a washing filter; the outlet of the washing filter is connected with the tube pass inlet of a steam condenser; the tube pass outlet of the steam condenser is connected with a steam-water separator; the shell side of the steam condenser is provided with a cooling air flue along a vertical direction; the top outlet of the steam-water separator is communicated with atmosphere after being connected with a discharge isolation valve, a restriction orifice and a radiation survey meter in sequence; the bottom outlet of the steam condenser and the condensate reflux inlet of the steam-water separator are connected with a main return tube after being connected with a drain valve and a No.1 check valve in sequence; the end part of the main return tube is connected with the washing filter after being connected with a No.2 check valve and a No.2 isolation valve in sequence. Under serious accidents, the long-term filtering and discharging of the containment can be met.

Description

technical field [0001] The invention relates to a containment filter discharge system for long-term passive operation, belonging to the technical field of reactor safety facilities. Background technique [0002] After a severe reactor core meltdown accident occurred, the core melt reacted with the concrete floor to produce a large amount of non-condensable gas, which mixed with the steam generated by the vaporization of the coolant and entered the containment, causing safety hazards. When the internal pressure of the containment vessel exceeds the safety limit, the integrity of the containment vessel will be destroyed if the pressure is not released in time, and a large amount of radioactive substances will be released into the environment, resulting in The radioactive pollution to the surrounding environment endangers the safety of the surrounding people. [0003] When the pressure inside the containment exceeds the safety limit under accident conditions, in order to prote...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a containment filter and discharge system for long-term passive operation in order to meet the long-term pressure relief requirements of containment filtration and discharge, and to overcome the defects and insufficiencies of the existing containment filter and discharge system that cannot work for a long time. A system that can meet the long-term filter discharge of the containment under severe accidents

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