A nuclear power plant containment spray system starting device and method

Abstract

The invention discloses a nuclear power station concrete containment spraying system starting device and a method thereof. The device comprises a concrete containment operation environment parameter detection module, a reactor trip timer, a signal processing module and a starting signal output module, wherein the concrete containment operation environment parameter detection module is used for detecting an operation environment parameter of a concrete containment; the reactor trip timer is used for calculating last time of a reactor trip; the signal processing module is used for acquiring a curve of the operation environment parameter which is changed along with time based on the operation environment parameter and the last time; the starting signal output module is used for outputting a concrete containment spraying system starting signal when the curve of the operation environment parameter which is changed along with the time indicates that a total stress borne by a current concrete containment concrete wall is in a preset scope. In the invention, a condition that the total stress which includes a temperature stress and is borne by the concrete containment concrete wall after a loop rupture accident or a main steam line rupture accident in the concrete containment is generated is changed along with the time is comprehensively considered, the stress borne by the concrete wall is limited in a safety limit value scope and sealing performance is guaranteed; and simultaneously a concrete containment integrity degree is monitored.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant containment protection, in particular to a device and method for starting a nuclear power plant containment spray system. Background technique [0002] A nuclear power plant is a factory that uses the energy released by nuclear fission or nuclear fusion reactions to generate electricity. Since nuclear fission or nuclear fusion will produce harmful radioactive substances, nuclear power plants need to use some buildings or equipment to shield the reactor from radiation. As the last safety barrier to prevent fuel fission products and primary loop radioactive substances from entering the external environment, the containment of nuclear power plants can effectively limit the release of radioactive substances to the environment. During the operation of the nuclear power plant, the containment vessel will face some working conditions. For example, when the primary circuit breakage accident oc...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the self-starting control of the containment spraying system existing in the prior art without considering the temperature stress borne by the concrete wall of the containment, which may cause the sealing performance of the containment to be destroyed before the containment spraying system is started phenomenon, and the technical problem that the integrity of the containment cannot be monitored, a device and method for starting the containment spray system of a nuclear power plant are provided, and the containment concrete after the primary circuit break accident in the containment or the main steam pipeline rupture accident is comprehensively considered The total stress borne by the wall, including the temperature stress, changes with time, and the sprinkler system is activated according to the change curve of the operating environment parameters (such as pressure or temperature) in the containment with time, so as to limit the stress borne by the concrete wall within a safe limit. Within the value, the sealing performance of the containment is guaranteed; at the same time, the integrity of the containment can be monitored to provide a way for the operator to know the status of the containment in time

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