Non-adjustment boron load tracking operation and control method for pressurized water reactor nuclear power plant

Abstract

A non-adjustment boron load tracking operation and control method for a pressurized water reactor nuclear power plant adopts a control rod group closed-loop fine adjustment mode to control a small-range power change process; for the large-range load shedding working condition that the reactor core power is 70% FP or above and the steam turbine instantaneously throws 50% FP or above, control is conducted in the mode of open-loop coarse adjustment of the control rod set and closed-loop fine adjustment of the control rod set, coordination control is conducted with a primary loop control system and a secondary loop control system, large-range load shedding or shut-down and non-stop operation is achieved, and safe operation is achieved. The control rod group selected by a control program falls into a reactor core under the action of gravity, and meanwhile, an M rod group and a steam discharge control system participate in the control process, so that the reactor power and the average temperature of a coolant are cooperatively controlled to be close to reference values, and the adjustment time of the control system is shortened; and boron adjusting operation in the operation process is greatly reduced, radioactive waste liquid is greatly reduced, and the automation degree, economical efficiency and operation safety of operation of the pressurized water reactor nuclear power station are improved.

Description

technical field [0001] The invention belongs to the field of nuclear energy science and engineering technology, and in particular relates to a tracking operation and control method for non-adjusting boron load of a pressurized water reactor nuclear power plant. Background technique [0002] Today, when energy and environmental issues are becoming increasingly prominent, nuclear power, as a clean energy that can be applied on a large scale, is playing an increasingly important role in ensuring energy security, optimizing energy structure, reducing carbon emissions, and building a beautiful China. my country's energy supply has an important strategic position. In order to meet the requirements of the power grid for nuclear power plants to achieve load-following operation, for active nuclear power plants, on the premise of not changing the overall layout of the primary and secondary circuits, research is conducted to obtain good load-following by redesigning the core fuel layout...

AI Technical Summary

Problems solved by technology

[0003] The second-generation pressurized water reactor nuclear power plant CPR1000 is the mainstream reactor type of nuclear power plants in operation in my country. It operates in G mode and has poor load tracking ability, and the load tracking process requires the operator to manually adjust the boron concentration, which is low in automation and poor in economy. A large amount of radioactive waste liquid, especially at the end of the life cycle, the boron concentration of the primary circuit coolant is already very low, it is difficult to adjust the reactivity by changing the boron concentration, therefore, the CPR1000 nuclear power plant using the G mode is only in the first 80% cycle life Effective, but loses load following capability at the end 20% of cycle life

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