A Combined Active and Passive Reactor Cavity Water Injection Cooling System

A technology for reactor cavity water injection and cooling system, which is applied in cooling devices, reactors, nuclear power generation, etc., can solve the problems of long solidification time and low cooling rate of molten material, and achieve short solidification time, small space occupation and high reliability high effect

Active Publication Date: 2017-05-10
CHINA NUCLEAR POWER ENG CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

But because the melt cooling rate is low, the solidification time of the melt is also longer, up to several months

Method used

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  • A Combined Active and Passive Reactor Cavity Water Injection Cooling System

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Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the combined active and passive reactor cavity water injection cooling system (CIS) includes a passive reactor cavity water injection tank 1 and two reactor cavity water injection cooling pumps 3, and the passive reactor cavity water injection tank 1 passes through The passive injection pipeline is connected to the reactor cavity 2, the reactor cavity water injection cooling pump 3 is arranged outside the containment 5, the inlet pipe of the reactor cavity water injection cooling pump 3 is connected to the refueling water tank 4, and the outlet of the reactor cavity water injection cooling pump 3 The pipeline runs through the containment vessel 5 and connects with the reactor cavity 2 . The refueling water tank 4 can be installed outside the containment or inside the containment. The preferred solution is to install the refueling water tank in the pit below the core, and the refueling water tank is located at the lowest point, so as to facilit...

Embodiment 2

[0033] The present invention also provides another active and passive combined reactor cavity water injection cooling system (CIS) structure, the main difference from Embodiment 1 is that the passive reactor cavity water injection tank is arranged outside the containment, which is different from the passive The passive injection pipeline connected to the reactor cavity water injection tank is respectively connected to the outlet pipelines of two reactor cavity water injection cooling pumps. The refueling water tank as the cooling water source may also be placed outside the containment.

[0034] The operation mode and working process of the CIS system in Embodiment 2 are similar to those of the CIS system in Embodiment 1. However, since the passive reactor cavity water injection tank is placed outside the containment, it is no longer possible to supplement the passive reactor cavity water injection tank with steam condensate from the PCS system. Therefore, an external water sup...

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Abstract

The invention belongs to reactor design technology, in particular to a reactor cavity water injection cooling system combining active and passive. Its structure includes a passive reactor cavity water injection tank and a reactor cavity water injection cooling pump. The passive reactor cavity water injection tank is connected to the reactor cavity through a passive injection pipeline, and the reactor cavity water injection cooling pump is arranged outside the containment vessel. The inlet pipe of the reactor cavity water injection cooling pump is connected to the refueling water tank, and the outlet pipeline of the reactor cavity water injection cooling pump passes through the containment and is connected to the reactor cavity. As a countermeasure against severe accidents, this system uses active and passive multi-redundancy and diversity methods to realize the safety functions of taking away core melt, discharging core heat, and preventing meltdown when an accident occurs.

Description

technical field [0001] The invention belongs to reactor design technology, in particular to a reactor cavity water injection cooling system combining active and passive. Background technique [0002] In nuclear power plants around the world, measures to deal with core melt are divided into two types: one is In-Vessel Retention (IVR), such as the US AP1000 reactor type, under severe accident conditions, when the core melts When unavoidable, the integrity of the lower head of the pressure vessel can be maintained by submerging the reactor cavity and cooling the outer wall of the pressure vessel, thereby retaining the molten core material in the pressure vessel. Cooling the core melt in a passive way has the advantages of simple structure and low cost (but not suitable for high-power nuclear power plants), and the melt can be confined in the pressure vessel, preventing the leakage of radioactive substances and ensuring the integrity of the containment shell. However, since th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C15/18
CPCG21C15/182G21D1/02G21C15/18Y02E30/30
Inventor 于勇袁霞赵侠张国强李京彦宋代勇万砺珂赵斌
Owner CHINA NUCLEAR POWER ENG CO LTD
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