Nuclear reactor cooling equipment and its operation method

Abstract

The invention discloses a nuclear reactor cooling equipment and its operation method. To reduce radiation exposure dose of workers during acces to a reactor pressure vessel in reactor well and remove decay heat without disturbing replacing work of fuel assemblies and control rods. In a reactor well and a fuel pool constructed in a reactor building, the outlet side of the fuel pool return line of a fuel pool cooling and purifying system line placed downstream the skimer surge line neighboring to the fuel pool is placed in the reactor well and the outlet side of reactor residual heat removal system lines are placed in the fuel pool. By this, radioactive crad contained in reactor water in the reactor pressure vessel is prevented from accumulating on the bottom of the reactor well and so radioactive exposure dose of workers can be reduced.

Description

technical field [0001] The invention relates to a reactor cooling device and its operation method which can reduce the radiation dose of the reactor well and eliminate the decay heat radiation without affecting the workability when it is close to the reactor pressure vessel in the nuclear power plant. Background technique [0002] refer to Figure 16 , illustrating the reactor cooling equipment of the improved boiling type nuclear power plant. [0003] Figure 16 Represents an overview of piping systems for reactor cooling equipment of the past. exist Figure 16 In , symbol 1 is the reactor pressure vessel, indicating the state where the reactor cover is removed, and the shroud head, steam-water separator and steam dryer on the core 2 are removed. Symbol 3 represents the overview of the internal pump (internal pump), Figure 16 The thick lines in the figure indicate the water flow state such as cooling water, stack water, pool water, etc.; the thin lines indicate the non-fl...

AI Technical Summary

Problems solved by technology

[0018] However, the reactor water flowing out from the reactor pressure vessel 1 contains radioactive dirt, and the dirt accumulates at the bottom of the reactor well 4. When the reactor well 4 is drained and the reactor well 4 is decontaminated at the bottom, radiation will affect the work. Radiation doses to personnel may increase

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