Boron recovery system of nuclear power plant

Abstract

The invention is suitable for the field of nuclear power plants, and provides a boron recovery system of a nuclear power plant, comprising a preposing temporary storage box, a filter desalination device, a degasser and an intermediate temporary storage box which are sequentially connected. A reactor coolant exhausted by a nuclear island of the nuclear power plant is collected by the preposing temporary storage box, is treated by the filter desalination device, and is stored in the intermediate temporary storage box so as to carry out boron-water separation treatment when hydrogen and radioactive gases in the reactor coolant are deprived by the degasser. The recovery system also comprises a bypass pipeline device, one end of the bypass pipeline device is connected with an inlet pipe of the degasser, the other end of the bypass pipeline device is connected with a water inlet pipe of the intermediate temporary storage box, and the reactor coolant in the preposing temporary storage box is directly exhausted to the intermediate temporary storage box. The boron recovery system of the nuclear power plant directly exhausts the reactor coolant going through the preposing temporary storage box and the filter desalination device to the intermediate temporary storage box through the bypass pipeline device, reduces the running time of the degasser when a machine set is overhauled, and saves the running cost at the same time.

Description

technical field [0001] The invention belongs to the field of nuclear power plants, in particular to a boron recovery system for nuclear power plants. Background technique [0002] The boron recovery system (TEP) is a system that collects hydrogen-containing reactor coolant and processes it through a purification section (demineralization, filtration, and degassing treatment) and a water / boric acid separation section (circulation evaporator treatment) to obtain re-use of the reactor coolant system A system of reactor-grade make-up water and 4% by weight boric acid concentrate; where the hydrogen-containing reactor coolant comes through the chemical and volume control system (RCV) downfall line. [0003] In the purification section of the TEP system, the degasser is used to remove hydrogen and radioactive gases in the reactor coolant collected in the front temporary storage tank in the TEP, and then pass the degassed reactor coolant to the intermediate temporary storage tank f...

AI Technical Summary

Problems solved by technology

[0006] However, the existing nuclear power plant boron recovery system also uses a degasser to remove hydrogen and radioactive gases from the reactor coolant during unit overhaul, resulting in long running time and high operating costs for the degasser

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