Reducing Accident Source Term Release Devices

Abstract

The invention discloses a releasing device capable of reducing accident source terms. The releasing device comprises a steam-water separation tank, an empty tank, a first isolation valve, a second isolation valve, a first pipeline, a second pipeline and a third pipeline, wherein the steam-water separation tank is communicated with the first interface of a steam generator through the first pipeline, the first isolation valve is arranged on the first pipeline, the empty tank is communicated with the second interface of the steam generator through the second pipeline, the second isolation valve is arranged on the second pipeline, the steam-water separation tank is communicated with the empty tank through the third pipeline, the first interface of the steam generator is located above the second interface and on the top of the second interface, and the top of the empty tank is lower than the top of the steam generator. Under normal working condition, the releasing device is vacuumized; after occurrence of an accident, when the steam generator reaches a high water level, the first and second isolation valves are opened, so steam space is increased, radionuclide is collected by the empty tank, occurrence of overflow of water is avoided, direct release of polluted water to the environment is effectively alleviated or avoided, and harm caused by the accident is reduced.

Description

technical field [0001] The invention relates to a device for a nuclear power plant, in particular to a release device for reducing accident sources and acting on a steam generator to reduce accident hazards. Background technique [0002] The steam generator for nuclear power plant is the connection hub between the primary and secondary loops in the nuclear power plant, and it is also one of the equipment with the most faults in the operation of the nuclear power plant; among them, the heat generated by the nuclear reactor is brought to the steam generator by the coolant, and the steam After the generator cools down, it returns to the reactor to continue cooling. This is the first loop; water is supplied to the steam generator, the steam generator generates steam to drive the steam turbine to work, and the cooled condensed water returns to the steam generator to continue to generate steam. This loop is called the second loop. The side circuit where the coolant enters the stea...

AI Technical Summary

Problems solved by technology

[0003] The working performance, safety and reliability of the steam generator are crucial to the safe and stable operation of the entire nuclear power plant; after the accident of the existing pressurized water reactor nuclear power plant, it is cooled by discharging steam through the atmospheric release valve on the secondary side of the steam generator The primary circuit, after the steam generator is full of water, will directly discharge the radioactive liquid into the external environment through the atmospheric release valve, which will cause the release of If the radioactive substances in the environment exceed the standard, it will cause nuclear pollution to the environment

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