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Method and system for state recovery after loss of single area under thermal shutdown condition of nuclear power unit
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A nuclear power unit and recovery method technology, applied in the field of nuclear power plants, can solve problems such as consuming a lot of time and resources, and the units cannot withstand state changes, and achieve the effect of saving time and resources
Active Publication Date: 2021-05-25
中广核工程有限公司 +1
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Problems solved by technology
However, it takes a lot of time and resources to withdraw from the hot shutdown condition to the cold shutdown condition and then upgrade to the hot shutdown condition. Status change from shutdown to thermal shutdown
Method used
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Embodiment 1
[0046] An embodiment of the present invention provides a state recovery method after a single area is lost under the thermal shutdown condition of a nuclear power unit, see figure 1 , the method includes:
[0047] S1. Under the condition of thermal shutdown, power off and isolate the process equipment in the lost area;
[0048] S2. Isolate the digital control system DCS of the lost area;
[0049] S3. Using the uninterruptible power supply in the adjacent area to supply power to the DCS in the lost area, and restore the DCS in the lost area;
[0050] S4. Restore the power supply of the process equipment in the lost area, and restore the nuclear power unit to the normal online state under the thermal shutdown condition.
[0051]Further, in step S1, the power-off isolation of the process equipment in the lost area specifically includes:
[0052] Combining with the electrical loadlist, single-line diagram of the electrical system and the online status of the process system, ob...
Embodiment 2
[0143] An embodiment of the present invention provides a state recovery system after the loss of a single region under the thermal shutdown condition of a nuclear power unit, which can realize all the processes of the state recovery method after the loss of a single region under the thermal shutdown condition of the nuclear power unit, see Figure 5 , the system includes:
[0144] The power-off isolation module 1 is used for power-off isolation of the process equipment in the lost area under the condition of thermal shutdown;
[0145] DCS isolation module 2, used to isolate the digital control system DCS in the lost area;
[0146] The DCS recovery module 3 is used to supply power to the DCS in the lost area by using the uninterruptible power supply in the adjacent area, and restore the DCS in the lost area; and,
[0147] The restoration module 4 is configured to restore the power supply of the process equipment in the lost area, and restore the nuclear power unit to the norma...
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Abstract
The invention discloses a state recovery method after the loss of a single area under the thermal shutdown condition of a nuclear power unit, comprising: under the thermal shutdown condition, power-off and isolation of process equipment in the lost area; digitization of the lost area The control system DCS is isolated; the DCS in the lost area is powered by the uninterruptible power supply of the adjacent area, and the DCS in the lost area is restored; the process equipment in the lost area is powered on, and the nuclear power unit is restored to normal online status under thermal shutdown conditions. The invention also discloses a state recoverysystem after a single area is lost under the thermal shutdown condition of a nuclear power unit. The invention can directly recover the lost area under the hot shutdown condition without affecting the normal operation of other areas, effectively saving a lot of time and resources.
Description
technical field [0001] The invention relates to the technical field of nuclear power plants, in particular to a state recovery method and system after a single area is lost under the thermal shutdown condition of a nuclear power unit. Background technique [0002] The pressurized water reactornuclear power plant is mainly composed of three parts: the pressurized water reactor, the primary loop (reactor loop) system and the secondary loop (turbine loop) system. Nuclear fission occurs in a reactor core made of nuclear fuel inside a pressure vessel. Pressurized water reactors use low-enriched uranium as fuel and light water as the coolant and moderator. The heat released by nuclear fission is taken out of the reactor by the high-pressure water flowing through the primary circuit system in the reactor, and the heat is transferred to the water in the secondary circuit in the steamer generator. The steam produced by the heated water drives a steam turbine, which drives a genera...
Claims
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Application Information
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