An embedded safety net device for a reactor and a method for installing the same

Abstract

The invention provides an embedded safety net device for a reactor. The safety net device includes a metal safety net (1) and a safety net support (2), and is installed at the upper side inside a reactor containment, the metal safety net device can effectively absorb heat and radiating particles escaped from a reactor core without external power when the reactor is seriously damaged, thereby accelerating heat dissipation in the reactor, and a thermophoresis deposition effect, a turbulence deposition effect and Brownian movement under a high temperature condition enable radioactive gas to be adsorbed to the surfaces of grids, thereby reducing pollution of the reactor to surrounding environment, and protecting safety of personnel and environment around a nuclear power plant. The invention also provides a method for installing the safety net device, and the method is simple to operate and easy to complete in a reactor.

Description

technical field [0001] The invention relates to nuclear reaction equipment, in particular to an embedded safety net device for a reactor. Background technique [0002] Severe accidents in nuclear power plants are accidents beyond the design basis in the design of nuclear power plants. Although the probability of occurrence is extremely low, once a serious accident occurs, the consequences are extremely serious. It will cause the pressure and temperature inside the containment to rise rapidly. [0003] Under severe accident conditions in nuclear power plants, the core loses effective cooling, and the residual heat of the core makes the zirconium cladding of the nuclear fuel element continue to heat up and react with water vapor to produce a large amount of hydrogen, which enters the containment and mixes with air. When the hydrogen concentration in the containment and other factors meet Under certain conditions, under a slight external stimulus, hydrogen may explode, and the...

AI Technical Summary

Problems solved by technology

The capacity of the external water tank is limited. In the case of sudden and complex situations, the problem of insufficient water supply may occur, and the continuous cooling of the containment cannot be guaranteed.

[0006] At present, there are few related studies in China, such as Chinese patent CN104064232 and Chinese patent CN105355239, which mainly focus on passively taking out the waste heat in the reactor, and the existing patent structure is relatively complicated, only suitable for specific reactor systems, non-modular design in It cannot be replaced when a part is damaged, and it lacks the function of adsorption and filtration of radioactive particles

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