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Method for synchronous replacement of fire water isolation valves in peripheral buildings in nuclear power plants
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A technology for water isolation valves and nuclear power plants, which can be used in fire rescue and other directions, and can solve problems such as difficulty in replacement and threats to unit safety, and achieve the effects of reducing potential safety hazards, ensuring safe operation, and speeding up drainage
Active Publication Date: 2021-05-11
LINGAO NUCLEAR POWER +5
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[0004] The purpose of the present invention is to provide a method for synchronously replacing the fire-fighting water isolation valves of peripheral buildings in nuclear power plants, so as to solve the problem of internal leakage of multiple isolation valves from the main engine fire-fighting pipe network to the peripheral fire-fighting pipe network existing in the prior art. Replacement, a serious threat to the safety of the unit
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[0068] Further, see Figure 1 to Figure 2 , as a specific implementation of the method for synchronously replacing the fire water isolation valves of peripheral buildings in nuclear power plants provided by the present invention, the block isolation S4 step specifically includes:
[0069] The first isolation block S41: closing the valves from each of the host fire-fighting pipe networks 20 to the peripheral fire-fighting pipe network 30;
[0070] The second isolation block S42: close the valves connecting the fire-fighting water pump group 11 to each of the host fire-fighting pipe networks 20;
[0071] The third isolation block S43: closing the isolation valves in the peripheral fire-fighting pipeline network 30 before connecting to the host fire-fighting pipeline networks 20 .
[0072] Through the step of the above-mentioned first isolation block S41, the fire-fighting water in the host fire-fighting pipe network 20 is prevented from entering the peripheral fire-fighting pip...
Embodiment approach
[0093] Further, see Figure 1 to Figure 2 , as a specific embodiment of the method for synchronously replacing the fire water isolation valve of the peripheral building in the nuclear power plant provided by the present invention, the block isolation step S4 also includes steps:
[0094] Overhaul shutdown S2: The steam turbine unit to be overhauled completes the core unloading condition, and the main transformer corresponding to the steam turbine unit is shut down. Safety risks can be further reduced by overhauling and shutting down the S2 step.
[0095] Further, see Figure 1 to Figure 2 , as a specific embodiment of the method for synchronously replacing the fire water isolation valve of the peripheral building in the nuclear power plant provided by the present invention, before the block isolation S4 step, after the overhaul shutdown S2 step, it also includes the steps:
[0096] Evacuation process S3: Evacuate the oil and hydrogen in the conventional island.
[0097] Thr...
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Abstract
The present invention relates to the technical field of fire water production and distribution systems in nuclear power plants, and provides a method for synchronously replacing fire water isolation valves in peripheral workshops in nuclear power plants, including the steps of: using a main temporary pipeline to connect an external fire pipe on the outlet communication pipe of a fire pump group with a The external fire-fighting heads on the main engine fire-fighting pipe network are connected; at least one exhaust pipe from the main engine fire-fighting pipe network to the peripheral fire-fighting pipe network is connected to the compressed air pipe of the power station; Isolation; replace each isolation valve, and gradually remove the isolation of each isolation valve; remove the main temporary pipeline. The method for synchronously replacing the fire-fighting water isolation valves of peripheral workshops in the nuclear power plant of the present invention can quickly discharge the water in the pipeline from the main engine fire-fighting pipe network to the peripheral fire-fighting pipe network, thereby improving the replacement efficiency of each isolation valve on the pipeline, shortening the replacement time, and ensuring Main engine fire pipe network fire water to ensure the safe operation of the steam turbine system and reduce potential safety hazards.
Description
technical field [0001] The invention belongs to the technical field of production and distribution systems of fire-fighting water in nuclear power plants, and more specifically relates to a method for synchronously replacing fire-fighting water isolation valves in peripheral workshops in nuclear power plants. Background technique [0002] The fuel used in nuclear power plants is highly dangerous; therefore, good and stable protection and maintenance are required when the nuclear power plant is in operation. This requires a good fire protection system to ensure the good operation of the generator set and supporting equipment of the nuclear power plant and to respond to emergencies at any time to ensure the safety of personnel. However, due to early nuclear power plants, it generally includes two steam turbine unit systems, peripheral auxiliary systems, and auxiliary supporting systems corresponding to each steam turbine unit system; each steam turbine unit system includes ste...
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