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Removable shround and pump deck for boiling water nuclear reactor

A technology for pump covers and nuclear reactors, applied in the direction of reactors, reactor fuel elements, climate sustainability, etc., can solve problems such as metal overstress corrosion cracking, and achieve the effect of easy repair and/or replacement

Inactive Publication Date: 2003-12-03
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cylinders in the ABWR have many horizontal welds similar to the welds in the BWR cylinders in the currently operating facility, so the same metal overstress corrosion cracking problem exists

Method used

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  • Removable shround and pump deck for boiling water nuclear reactor
  • Removable shround and pump deck for boiling water nuclear reactor
  • Removable shround and pump deck for boiling water nuclear reactor

Examples

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Embodiment Construction

[0024] Referring to FIG. 1 , an advanced boiling water reactor 10 with an internally welded core cylinder is illustrated. However, before discussing the cylindrical structure, it may be instructive to briefly describe the general structure of the reactor.

[0025] The reactor pressure vessel (or RPV) 12 is essentially a cylindrical vessel with a single full diameter removable top cover 14 . The top cover 14 is bolted to the cladding as indicated at 16 . The RPV 12 houses the core barrel 18 , top guide apparatus 20 , core plate apparatus 22 , steam separator 24 and steam dryer 26 . Also included in the reactor plant are an in-reactor pump 28 (here also referred to as a jet pump), control rods 30 and associated drives 32 . The control rods 30 occupy the space between the fuel assemblies within the reactor core in a conventional manner and can be withdrawn from the core into guide tubes below the core when the plant is in operation.

[0026] An annular pump cover plate 34, in ...

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PUM

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Abstract

In a pressure vessel of a nuclear reactor containing a core assembly enclosed within a core shroud, the core shroud spaced radially inwardly of a side wall of the pressure vessel with an annular pump deck located in an annular radial space between the core shroud and the side wall of the pressure vessel, the improvement wherein the shroud is removably secured to an annular support leg extending upwardly from the bottom of the pressure vessel; and further wherein the annular pump deck is provided in the form of a plurality of removable segments.

Description

technical field [0001] This invention relates to boiling water nuclear reactors, and more particularly to a novel core barrel and pump cover design that allows for easy removal and / or replacement of reactor components when they become damaged or require repair or replacement . Background technique [0002] A typical boiling water nuclear reactor consists of a reactor assembly consisting of the reactor pressure cladding, its internals including the core, core barrel, top guide assembly, core plate assembly, vapor separator and drying device components. Also included within the reactor assembly are the control rods, the control rod drive shield, and the control rod drive mechanism. [0003] The reactor pressure vessel is generally a cylindrical pressure vessel (RPV) with a single full diameter removable top cover. The barrel located inside the RPV is a cylindrical stainless steel structure and it surrounds the core to provide a partition to separate the fluid flow down in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C5/00G21C5/10G21C13/024G21C15/02G21C15/24G21C19/02
CPCG21C13/024G21C15/24G21Y2004/50G21Y2002/302G21Y2002/40G21C5/10Y02E30/40G21Y2004/301Y02E30/30
Inventor C·W·雷尔夫
Owner GENERAL ELECTRIC CO
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