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Cask and method of producing the same

A shielding tank, one party's technology, applied in the field of shielding tanks, can solve the problems of undisclosed manufacturing methods and unclear realization

Inactive Publication Date: 2005-08-31
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific manufacturing method of installing the outer cylinder on the cylinder body of the shielding tank through the heat transfer fins has not been disclosed, and it is not clear whether it can be realized

Method used

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  • Cask and method of producing the same
  • Cask and method of producing the same
  • Cask and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0133] figure 1 It is a perspective view showing the shielding tank according to Embodiment 1 of the present invention. figure 2 yes figure 1 A radial cross-sectional view of the shielding tank shown. The shielding tank 100 is characterized by having an outer cylinder 10 composed of a plurality of belt-shaped members 105a, 105b, and grooves 30s in the axial direction of the cylinder body are formed on the plurality of belt-shaped members 105a, 105b. In addition, in figure 1 In, the outer cylinder 10 and the cylinder body 102 are briefly described, but the actual outer cylinder 10 and the cylinder body 102 are as follows figure 2 The shape and composition shown. Next, the configuration of the shielding tank 100 according to Embodiment 1 will be described.

[0134]In this shielding tank 100, the inner surface of the inner cavity 102 of the cylinder body 101 is machined in accordance with the outer peripheral shape of the hanging basket 301a. The machining of the inner...

Deformed example 1

[0211] Figure 28 It is an explanatory drawing showing the outer cylinder of the shielding can of the 1st modification of Embodiment 1. The outer cylinder 11 of this shielding tank has substantially the same structure as the outer cylinder 10 of the shielding tank in Embodiment 1, but the difference lies in that a plurality of The groove 31 s has an inclination angle θ with respect to the axial direction (arrow Z direction in the figure) of the barrel body 101 of the shielding tank. Since other configurations are the same as those in Embodiment 1, description thereof will be omitted, and the same reference numerals will be used.

[0212] Such as Figure 28 As shown, a plurality of grooves 31s having an inclination angle θ with respect to the axial direction of the cylinder body 101 of the shielding tank are formed on the heat dissipation surface side of the belt-shaped member 105a forming the outer cylinder 11 . The depth h and width l of the groove 31s are as described in ...

Deformed example 2

[0215] Figure 29 It is an explanatory drawing showing the outer cylinder of the shielding can of the 2nd modification of Embodiment 1. The outer cylinder 12 of this shielding tank has substantially the same structure as the outer cylinder 10 of the shielding tank of Embodiment 1, but the difference lies in that: a heat dissipation surface (surface above the paper surface in the figure) is provided with a The groove 32s facing the circumferential direction of the cartridge body 101 . Since other configurations are the same as those in Embodiment 1, description thereof will be omitted, and the same reference numerals will be used.

[0216] Such as Figure 29 As shown in (a), a plurality of grooves 32 s are formed on the heat dissipation surface side of the band-shaped member 105 a forming the outer cylinder 12 . The heat dissipation fins 32f are formed on the heat dissipation surface side of the band member 105a and the like by the grooves 32s. In addition, the depth h and ...

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Abstract

A cask and method of producing the same. Grooves (30s) are formed in the heat radiation face (105p) of the band-like members (105a, 105b) structuring an outer tube (10) of this cask, the grooves (30s) forming heat radiation fins (30f) on the heat radiation face (105p) of the band-like member (105a) etc. Heat transmission fins (107) are respectively welded to both sides of the band-like member (105a) except its both end edges (welded portions (205)). The heat transmission fins (107) are welded to overlay portions (201) on the surface of a barrel main body (101) (welded portions (206)). The band-like member (105a) and the heat transmission fins (107, 107) form a unit (105c) with a U-shape cross section, and the units are welded on the surface of the barrel main body (101) at fixed intervals. As shown in Fig. 17(b), step portions (202) are formed at both end edges of the band-like member (105a), and step portions (203) of the band like member (105b) is fitted in the step portions (202) and welded (welded portion (204)).

Description

technical field [0001] The present invention relates to a shielding tank with excellent heat dissipation performance for storing and storing spent fuel aggregates after combustion and efficiently releasing the decay heat of the spent fuel aggregates to the atmosphere, and a method for manufacturing the shielding tank. Background technique [0002] Nuclear fuel aggregates that have ended combustion at the end of the nuclear fuel cycle and are no longer usable are called "spent fuel aggregates". Spent fuel aggregates need to be thermally cooled because they contain high radioactive substances such as FP, so they are cooled for a specified period (1 to 3 years) in the cooling pit of the nuclear power plant. Then, it is housed in a shielded tank as a shielded container, transported by truck, etc., and stored to a reprocessing facility. The spent fuel aggregates are inserted one by one into cells of a basket provided in the cask, thereby securing an appropriate holding force aga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F5/00G21F5/008G21F5/012G21F5/10G21F5/12
CPCG21F5/012G21Y2004/30G21Y2002/302G21F5/008G21Y2004/40G21F5/10G21F5/00G21Y2002/201G21F5/12G21Y2002/30Y02E30/30G21C19/32G21F9/36
Inventor 玉置广纪
Owner MITSUBISHI HEAVY IND LTD
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