Control system and method for long-term low-power biased loop operation of multi-loop reactor

Abstract

The invention relates to a control system and method for a long-term low-power biased loop operation of a multi-loop reactor. The control method comprises a downlink power control method and an uplink power control method. A biased loop operation control system is established, and a scientific and feasible control method is adopted, so that the stable operation and steady output problems of the unit positioned in a low-power state for a long time can be solved when a nuclear powered vessel performs self-propelled marine operation, reactor trip is not needed when the nuclear powered vessel operates at low power for a long time, namely the stable operation and steady output of the unit can be realized, and obvious economic benefits are achieved. The long-term low-power marine operation of the ship is realized, and the application range of the reactor is widened. Moreover, since the reactor trip is not needed in the power switching process, the low-power operation risk is reduced, and the safety and economic efficiency of the unit are greatly improved.

Description

technical field [0001] The invention relates to the technical field of nuclear reactors, in particular to a control system and method for long-term low-power partial-loop operation of a multi-loop reactor. Background technique [0002] When nuclear-powered ships are self-propelled at sea, they are in a low-power state for a long time. CPR1000 unit evaporator cooling under partial loop operation in normal shutdown mode is suitable for land-based large-scale commercial pressurized water reactor nuclear power plants with a capacity of one million kilowatts. The main function is to ensure the safety of the reactor core under shutdown status, and it cannot be used for long-term low power. Operating status. [0003] When the reactor is running at low power for a long time, it is prone to flow instability. After adding a throttling piece, the situation will be improved. Generally speaking, the greater the flow resistance of the throttling piece, the more stable the operation of th...

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Problems solved by technology

CPR1000 unit evaporator cooling under partial loop operation in normal shutdown mode is suitable for land-based large-scale commercial pressurized water reactor nuclear power plants with a capacity of one million kilowatts. The main function is to ensure the safety of the reactor core in the shutdown state, and it cannot be used for long-term low power Operating status

[0003] When the reactor is running at low power for a long time, it is prone to flow instability. After adding a throttle, this situation will be improved. Generally speaking, the greater the flow resistance of the throttle, the more stable the operation of the steam generator, but the throttle Flow resistance is limited by design and manufacturing, and the greater the flow resistance, the higher the cost

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