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Integrated pressurized water reactor with built-in steam pressurizer heat shield and its components

A heat shield and pressurized water reactor technology, applied in thermal reactors, nuclear reactors, reducing greenhouse gases, etc., can solve problems such as coolant loss accidents, achieve high safety, significant effects, and high temperature resistance

Active Publication Date: 2017-07-04
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem in the prior art that when the external electric heating steam pressurizer is connected to the reactor coolant system through the surge tube, there is a potential risk of coolant loss of water accidents due to the rupture of the surge tube, and to provide a high-temperature The heat insulation plate of the built-in steam pressurizer of the pressurized water reactor has a high-pressure environment, good heat insulation performance, and realizes two-way rapid fluctuations of the supercooled water and saturated water of the reactor under various transient conditions; the invention also provides the built-in Integrated pressurized water reactor composed of heat shield of steam pressurizer

Method used

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  • Integrated pressurized water reactor with built-in steam pressurizer heat shield and its components
  • Integrated pressurized water reactor with built-in steam pressurizer heat shield and its components
  • Integrated pressurized water reactor with built-in steam pressurizer heat shield and its components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] PWR built-in steam pressurizer heat shield, such as figure 1 with figure 2 As shown, it includes a heat shield body 1 composed of double-layer austenitic stainless steel plates forming an air interlayer 2, and a connecting body 3 arranged above the heat shield body 1 and integrally formed with it and combined to form an inverted hat-shaped composite structure; The heat shield body 1 is provided with a cylindrical wave hole 4 .

[0034] The connecting body 3 is a ring-shaped structure, the inner diameter of the connecting body 3 is the same as the outer diameter of the outer wall of the heat insulating board body 1, and the outer diameter of the outer wall of the heat insulating board body 1 extends upward, and the connecting body 3 is fixed on the heat insulating board body 1 The extended part of the outer wall and the heat shield body 1 and the connecting body 3 are integrally formed. After the heat shield body 1 and the connecting body 3 are combined, the inverted h...

Embodiment 2

[0037] The difference between this embodiment and Embodiment 1 is that in this embodiment, the specific structure of the heat shield of the built-in steam pressurizer of the PWR is optimized.

[0038] Such as Figure 1 ~ Figure 3 As shown, in this embodiment, the cylindrical undulation hole 4 is located at the central part of the heat shield body 1 . In this embodiment, a radial stiffening plate 5, a circumferential stiffening plate 6 and a metal reflective layer 7 are also added, and the specific setting method is as follows:

[0039] In this embodiment, the number of the hoop stiffening plates 6 is four, which are arranged in the air interlayer 2 and between the cylindrical wave hole 4 and the connecting body 3, as image 3 As shown, the thickness of the hoop stiffening plate 6 adjacent to the cylindrical wave hole 4 is about 40 mm, and the thickness of the other hoop stiffening plates 6 is about 20 mm.

[0040] The number of said radial stiffeners 5 is eight, which are ev...

Embodiment 3

[0044] The difference between this embodiment and Embodiment 1 and Embodiment 2 is that this embodiment applies the built-in steam pressurizer heat shield of the pressurized water reactor in Embodiment 1 or 2 to the pressurized water reactor, and discloses a method for implementing The heat shield in Example 1 or 2 constitutes the structure of an integrated pressurized water reactor, and its specific structure is as follows:

[0045] An integrated pressurized water reactor, comprising a reactor pressure vessel 8 with a top cover head 11, a reactor coolant supercooled water 9 located in the reactor pressure vessel 8, a built-in pressurizer saturated water 10 located above the reactor coolant supercooled water 9, And welded in the top cover head 11 is used to separate the reactor coolant supercooled water 9 and the built-in pressurizer saturated water 10 of the heat shield.

[0046] The above heat insulation board is the heat insulation board of the built-in steam pressurizer of...

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Abstract

The present invention discloses an integrated pressurized water reactor with a built-in steam pressurizer heat shield and its composition, which mainly solves the problem of connecting the external electrically heated steam pressurizer and the reactor coolant system through a wave tube in the prior art There is a potential problem of the risk of coolant loss accidents due to the rupture of the surge tube. The thermal insulation panel of the built-in steam pressurizer of the pressurized water reactor in the present invention includes a thermal insulation panel body (1) composed of double-layer austenitic stainless steel plates forming an air interlayer (2), and a thermal insulation panel body (1) ) above and integrally formed with it and combined to form a connecting body (3) of an inverted hat-shaped composite structure; the heat shield body (1) is provided with a cylindrical undulating hole (4). The invention has the advantages of satisfying high-temperature and high-pressure environments, good heat insulation performance, and realizing two-way rapid fluctuations of supercooled water and saturated water in various transient working conditions of a reactor, and the like.

Description

technical field [0001] The invention relates to a thermal insulation board, in particular to a thermal insulation board for a built-in steam pressurizer in a pressurized water reactor and an integrated pressurized water reactor composed of the thermal insulation board. Background technique [0002] The traditional external electric heating steam pressurizer is a high-pressure vessel consisting of a vapor-liquid two-phase space, the upper half of which is a saturated steam space and the lower half is a saturated water space. In the steam space of the pressurizer, there are sprayer connecting pipes, pressure relief valve connecting pipes and safety valve connecting pipes; in the water space, there is an electric heater, and the bottom is connected to the hot section pipe of the reactor coolant system through a wave pipe. [0003] Since the steam pressurizer is connected with the reactor coolant system through the surge tube, there is an inevitable risk of a potential loss of c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C1/09
CPCG21C1/09G21C1/10Y02E30/30
Inventor 秦忠宋丹戎李庆
Owner NUCLEAR POWER INSTITUTE OF CHINA