A Containment Filtration and Drainage System with Long-term Passive Operation

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, and belongs to the technical field of reactor safety facilities. Background technique [0002] After a serious accident of the reactor core meltdown, the core melt reacts with the concrete floor to produce a large amount of non-condensable gas. The non-condensable gas mixes with the steam generated by the vaporization of the coolant and enters the containment, which will cause safety When the internal pressure of the containment exceeds the safety limit, if the pressure is not relieved in time, the integrity of the containment will be destroyed, and a large amount of radioactive materials will be released into the environment. Radioactive pollution to the surrounding environment endangers the safety of surrounding people. [0003] When the pressure inside the containment under accident conditions exceeds the safety limit, in order to protect the integrity of the c...

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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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