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Passive pressure-relief, water-injection and cooling system for floating nuclear power plant and operation method therefor

A technology of cooling system and operation method, which is applied in nuclear power generation, cooling device, nuclear engineering and other directions, can solve the problems of difficulty in arranging water tanks and limited capacity of water tanks in the safety barrier of the reactor compartment, so as to reduce the probability of core melting and reduce the safety barrier of the reactor compartment. The effect of failure probability, long-term stable discharge, reduction of core melting probability, and cabin failure probability

Active Publication Date: 2015-10-14
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The design of the floating nuclear power plant is compact, and it is difficult to arrange water tanks in the safety barrier of the stack, and the capacity of the water tanks arranged in the cabin is also limited

Method used

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  • Passive pressure-relief, water-injection and cooling system for floating nuclear power plant and operation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Shown.

[0035] The passive pressure-reducing water injection cooling system of a floating nuclear power plant includes a shell 13, a stack 5 is set in the shell 13, a pressure vessel 4 is set in the stack 5, and a core 17 and a regulator 6 are set in the pressure vessel. An outer flow channel 2 is formed between the lower head of the container 4 and the bottom 1 of the stack 5; a pressure-reducing water tank 10 is also provided in the shell 13 and a partition 16 is provided in the pressure-reducing water tank 10, and the partition 16 will drop The pressurized water tank 10 is divided into a spraying area 161 and a water injection area 162. The spraying area 161 and the water injection area 162 are connected at the bottom area of ​​the depressurized water tank 10; it also includes a cold water side heat exchanger 12 arranged outside the shell 13 to exchange heat on the cold water side. The heat exchanger inlet pipe 121 of the heat exchanger 12 communicates...

Embodiment 2

[0038] On the basis of embodiment 1, the top of the stack 5 in this embodiment communicates with the common pipe X through a pressure relief pipe B; the pressure relief pipe B is provided with a control valve B8 and a check valve B; the outer flow channel 2 passes through a water injection pipe D It is connected to the common pipe Y, and the water injection pipe D is provided with a control valve D15 and a check valve D.

[0039] In the same way, when the pressure of the stack is too high, the pressure release of the stack is started by opening the control valve B8; the stack is filled with water by opening the control valve D15 to flood the pressure vessel. After the lower head area of ​​the pressure vessel is submerged, the system constitutes a passive thermal cycle to export the residual heat of the pressure vessel to the pressure-reducing water injection tank. The coolant in the spraying area in the pressure-reducing water injection tank is heated, and the water density in the...

Embodiment 3

[0061] The operating method of the passive pressure-reducing water injection cooling system of a floating nuclear power plant includes the passive pressure-reducing water injection cooling system of the floating nuclear power plant. When the temperature of the outlet fluid of the reactor core reaches the design fixed value, the control valve A7 is opened through the pressure relief pipe A and The common pipe X relieves the pressure of the pressure vessel and at the same time opens the control valve C. The coolant in the water injection area 162 enters the pressure vessel through the common pipe Y and the water injection pipe C. The coolant floods the core. After the core is submerged, the coolant in the pressure vessel And the coolant flow cycle of the depressurization water tank constitutes a passive thermal cycle, which leads the core waste heat to the depressurization water injection tank.

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Abstract

The invention discloses a passive pressure-relief, water-injection and cooling system for a floating nuclear power plant and an operation method therefor. According to the passive pressure-relief, water-injection and cooling system, a reactor room is arranged in a shell body, a pressure vessel is arranged in the reactor room, a reactor core and a pressure stabilizer are arranged in the pressure vessel, and an outward flow passage is formed between a lower closure head of the pressure vessel and the reactor room bottom of the reactor room; a pressure relief water tank is further arranged and is divided into a sprinkling area and a water injection area by a partition plate, and the sprinkling area and the water injection area are communicated at a bottom area of the pressure relief water tank; the system further comprises a cold water side heat exchanger which is arranged outside the shell body, a heat exchanger water inlet pipe of the cold water side heat exchanger is communicated with a top area of the sprinkling area, and a heat exchanger water outlet pipe of the cold water side heat exchanger is communicated with the water injection area; and the pressure stabilizer is communicated with the sprinkling area sequentially through a pressure relief pipe A and a common pipe X, a control valve A is arranged on the pressure relief pipe A, a non-return valve X is arranged on the common pipe X, a fall area of the pressure vessel is communicated with the water injection area sequentially through a water injection pipe C and a common pipe Y, and a non-return valve C and a control valve C are arranged on the water injection pipe C.

Description

technical field [0001] The invention relates to the field of depressurization safety of floating nuclear power plants, in particular to a passive depressurization water injection cooling system of floating nuclear power plants and an operating method thereof. Background technique [0002] A floating nuclear power plant is a mobile nuclear power plant built on a floating platform. Floating nuclear power plants are more resistant to earthquakes and are less affected by natural disasters such as earthquakes and volcanic eruptions. Floating nuclear power plants are floating on the sea and have good flexibility. They can provide hot water, fresh water and electricity to overseas isolated islands and oil drilling platforms. However, since the floating nuclear power plant is built on the sea and has no external power supply, once its own power generation system fails, the active equipment will not be able to operate normally. Therefore, it is particularly necessary to use a non-e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/18
CPCG21C15/18Y02E30/30
Inventor 邓坚丁书华向清安张渝余红星
Owner NUCLEAR POWER INSTITUTE OF CHINA