A reactor pressure vessel external cooling system

An external cooling and pressure vessel technology, applied in reactors, cooling devices, reducing greenhouse gases, etc., can solve the problems of no nanofluid technology, application of patent applications, etc., achieve high reliability and increase the effect of CHF value

Active Publication Date: 2017-11-24
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A survey of patent databases at home and abroad shows that there is no patent application for the application of nanofluid technology to the IVR strategy of pressurized light water reactors

Method used

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  • A reactor pressure vessel external cooling system
  • A reactor pressure vessel external cooling system
  • A reactor pressure vessel external cooling system

Examples

Experimental program
Comparison scheme
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Embodiment

[0031] like figure 2 As shown, the external cooling system of the reactor pressure vessel in this embodiment is provided with two active injection paths, that is, two active injection units 10 are included, and two nanofluid units 30 are also provided, wherein the marks NO1-NO9 in the figure Indicates different nodes on the path, PO1 and PO2 are two active injection pumps 12, CV01-CVO4 are outlet check valves 33, GP01-GP03 are generalized passive fluid control units 32, DI01 and DI02 are flow calibration orifice plates 13, MV02 and MV03 are electric isolation valves 14 .

[0032] In this embodiment, in order to save the space occupied by the system, a common section, that is, a pipeline between N05→N07 and N06→N08, is set between the active injection path and the passive injection path. The two active injection paths are: N02→N05→N07→N04, N03→N06→N08→N04; the passive injection path is: N01&N09→N05&N06→N07&N08→N04. Two nanofluid storage tanks 31 are connected in parallel wit...

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PUM

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Abstract

The invention discloses an external cooling system of a reactor pressure vessel. The external cooling system comprises an active cooling unit, a passive cooling unit and a nano fluid unit, wherein the nano fluid unit is connected to a connecting pipeline between the active cooling unit and a reactor cavity and to a connecting pipeline between the passive cooling unit and the reactor cavity in parallel; the active cooling unit comprises an active injection water source and an active injection pump, and the active injection water source is communicated with the reactor cavity through the active injection pump; the passive cooling unit comprises a passive injection water source, and the passive injection water source is communicated with the reactor cavity; the nano fluid unit comprises a nano fluid storage tank. By injecting the nano fluid, the pressure vessel can be more reliably, powerfully and continuously cooled under a severe working condition, so that the IVR (In-Vessel Retention) process is more reliable.

Description

technical field [0001] The invention relates to the design field of nuclear power plant reactor core melt retention system, in particular to an external cooling system of a reactor pressure vessel. Background technique [0002] In-vessel Retention (IVR) is one of the commonly used severe accident mitigation strategies for light water reactors, that is, through the continuous cooling of the outer surface of the reactor pressure vessel, the heat of the core melt can be effectively obtained. export, so as to avoid the failure of the lower head and ensure that the core melt stays inside the pressure vessel. The existing IVR systems include AP1000-IVR system based on natural circulation, ACP1000-CIS system based on active and passive, and ACPR1000-IVR system based on natural circulation. With the increasing emphasis on nuclear safety issues, the industry is paying more and more attention to IVR technology, and the requirements for IVR reliability and cooling capacity are also in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C15/18G21C15/28
CPCY02E30/30
Inventor 韩旭王广飞周钢马卫民元一单李军
Owner CHINA NUCLEAR POWER ENG CO LTD
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