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Spent fuel storage grillage

A technology for storing grids and spent fuel, which is applied in the fuel field of pressurized water reactor nuclear power plants, can solve the problems of pool structure damage, failure to meet the needs of use, and low density, so as to reduce grid spacing, increase quantity, and improve economic efficiency. benefit effect

Active Publication Date: 2011-01-26
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional spent fuel storage grid has low storage capacity and low density, which cannot meet the needs of use, and the fixing method of the grid and the pool is also likely to cause damage to the pool structure under earthquake conditions, causing serious accidents

Method used

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Embodiment Construction

[0019] The spent fuel storage grid of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 and figure 2 As shown, in a 9×10 spent fuel storage grid, the bottom plate 6, the transverse partition 1 and the longitudinal partition 2 are combined to form a square storage cavity for storing spent fuel, and the bottom plate 6, the transverse partition 1 and the longitudinal partition 2 are perpendicular to each other, the width of the transverse partition 1 is the same as the width of the grid, the transverse partition 1 is provided with a longitudinal slot, and the two sides of the longitudinal partition 2 are respectively embedded in the corresponding sides of the two adjacent transverse partitions 1 In the longitudinal groove, the bottom edges of the transverse partition 1 and the longitudinal partition 2 are welded and fixed on the bottom plate 6 . On the side of the bo...

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Abstract

The invention relates to the technical field of fuel of pressurized water reactor nuclear power plants, and in particular discloses a spent fuel storage grillage. Compared with the conventional loosened grillage, the spent fuel storage grillage is a compact spent fuel storage grillage, and channels are formed on enclosing plates and baffles directly so as to form square storage cavities; neutron absorbing plates made of boron stainless steel plates are fixed in the square storage cavities, so that the grid distance of the storage grillage is reduced greatly, the number of fuel assemblies stored in a pond of unit area is increased obviously, and the economic benefit of the power plants is improved.

Description

technical field [0001] The invention belongs to the technical field of pressurized water reactor nuclear power plant fuel, and in particular relates to a spent fuel storage grid. Background technique [0002] The spent fuel unloaded from the reactor during the operation of the nuclear power plant is usually stored in the spent fuel storage pool of the fuel building. Dedicated transport containers are loaded and shipped to reprocessing plants or intermediate storage facilities. [0003] In the prior art, almost all spent fuel assemblies of nuclear power plants are stored underwater in spent fuel storage grids, not only because water can provide operators with a cheap and transparent radiation shielding layer, but also because water can be easily Export the decay heat of spent fuel assemblies. The early spent fuel storage grids were mainly loose-type spent fuel storage grids. The loose type grid does not contain neutron poison materials. In order to ensure that it meets the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C19/07
CPCY02E30/30
Inventor 刘慧芳王庆唐兴贵左树春吴明谢亮崔岚郭利峰路晓晖胡忠全梁志霍小东程和平刘建平元一单王世民杨林民王春明刘树斌
Owner CHINA NUCLEAR POWER ENG CO LTD
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