Device for positioning and axially aligning a fuel assembly and process and apparatus for restoring a positioning element
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0458732
(2003-06-11)
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우선권정보 |
FR-0004251 (2003-04-04); FR-0007163 (2002-06-11) |
발명자
/ 주소 |
- Morel, Gilles
- Grypczynski, Daniel
- Joly, S?bastien
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
1 |
초록
▼
The apparatus for positioning a fuel assembly (10) comprises, on a respective side of the core support plate (19) and the upper core plate (9) directed towards an endpiece (15, 14) of the fuel assembly (10) at least two projecting positioning pins (16, 22) adapted to engage in openings in the lower
The apparatus for positioning a fuel assembly (10) comprises, on a respective side of the core support plate (19) and the upper core plate (9) directed towards an endpiece (15, 14) of the fuel assembly (10) at least two projecting positioning pins (16, 22) adapted to engage in openings in the lower endpiece (15) or upper endpiece (14). Each of the positioning pins (16, 22) is fixed in a blind opening (24) comprising a threaded bore and a support surface perpendicular to the axis of the blind opening (24) and comprises a flange adapted to come into contact with the support surface when the positioning pin (16, 22) is screwed into the threaded bore. A gudgeon enables the positioning pin to be locked to secure it against unscrewing. The invention also relates to a process and apparatus for replacing damaged positioning pins on the core support plate (19) or on the upper core plate (9).
대표청구항
▼
1. Device for positioning and axially aligning a fuel assembly (10) in the core (8) of a water-cooled nuclear reactor, consisting of fuel assemblies (10) of straight prismatic shape, each resting, via a lower endpiece (15), on a horizontal support plate (19) of the core, with its axis vertical, and
1. Device for positioning and axially aligning a fuel assembly (10) in the core (8) of a water-cooled nuclear reactor, consisting of fuel assemblies (10) of straight prismatic shape, each resting, via a lower endpiece (15), on a horizontal support plate (19) of the core, with its axis vertical, and held by an upper core plate (9) resting on an upper endpiece (14) of the fuel assembly (10), comprising, on a respective surface of the core support plate (19) and of the upper core plate (9) directed, respectively, towards the upper endpiece (14) and towards the lower endpiece (15) of the fuel assembly, at least two projecting positioning pins (16, 22) each fixed in an axial direction of alignment of the fuel assembly (10), inside a pin fixing opening (24, 26), to engage respectively in positioning openings for the lower endpiece (15) and the upper endpiece (14) of the fuel assembly (10), characterised in that:each of the fixing openings for positioning pins (16, 22) in the core support plate (19) and upper core plate (9) comprises a blind threaded bore (24) and a support surface (26a) perpendicular to the axial direction of the fixing opening having at least one dimension greater than a diameter of the threaded blind bore (24), extending around the bore, each of the positioning pins (16, 22) comprises a threaded shaft (22b) to enable it to be secured by screwing in the threaded bore (24) of the fixing opening and an annular flange (30) having a dimension greater than the diameter of the shaft for bearing on the support surface (26a), and each of the positioning pins (16, 22) is retained, after screwing and locking in the core support plate (19) or in the upper core plate (9), by a gudgeon (31) engaging in the flange (30) of the positioning pin (16, 22) and in a cavity (32) in the corresponding plate (9, 19) and made inseparable from the positioning pin (16, 22) and the corresponding plate (9, 19).
이 특허에 인용된 특허 (1)
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Altman David A. (Plum PA) Chrise James R. (Trafford PA) Bevilacqua Bruce W. (Export PA) Calhoun Gregory L. (Allegheny Township ; Westmoreland County PA), Remotely replaceable fuel assembly alignment pin.
이 특허를 인용한 특허 (7)
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Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexey Glebovich; Montgomery, Michael H., Fuel assembly.
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Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexey Glebovich; Montgomery, Michael H., Fuel assembly.
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Bashkirtsev, Sergey Mikhailovich; Morozov, Alexey Glebovich; Totemeier, Aaron, Fuel assembly.
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Totemeier, Aaron; Bashkirtsev, Sergey M.; Morozov, Alexey G., Fuel assembly.
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Bashkirtsev, Sergey M.; Kuznetsov, Valentin F.; Kevrolev, Valery V.; Morozov, Alexey G., Light-water reactor fuel assembly (alternatives), a light-water reactor, and a fuel element of fuel assembly.
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Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexei Glebovich; Montgomery, Michael H., Nuclear reactor (alternatives), fuel assembly of seed-blanket subassemblies for nuclear reactor (alternatives), and fuel element for fuel assembly.
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Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexey Glebovich, Nuclear reactor (alternatives), fuel assembly of seed-blanket subassemblies for nuclear reactor (alternatives), and fuel element for fuel assembly.
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