GB1117237A - Creation of Inventions and Patents with Artificial Intelligence

GB1117237A – Improvements in or relating to nuclear reactor fuel assemblies
– Google Patents

GB1117237A – Improvements in or relating to nuclear reactor fuel assemblies
– Google Patents
Improvements in or relating to nuclear reactor fuel assemblies

Info

Publication number
GB1117237A

GB1117237A
GB44459/64A
GB4445964A
GB1117237A
GB 1117237 A
GB1117237 A
GB 1117237A
GB 44459/64 A
GB44459/64 A
GB 44459/64A
GB 4445964 A
GB4445964 A
GB 4445964A
GB 1117237 A
GB1117237 A
GB 1117237A
Authority
GB
United Kingdom
Prior art keywords
rods
framework
wires
fuel
spacer grid
Prior art date
1964-10-30
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB44459/64A
Inventor
Thomas Seddon
John Chetter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

UK Atomic Energy Authority

Original Assignee
UK Atomic Energy Authority
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1964-10-30
Filing date
1964-10-30
Publication date
1968-06-19

1964-10-30
Application filed by UK Atomic Energy Authority
filed
Critical
UK Atomic Energy Authority

1964-10-30
Priority to GB44459/64A
priority
Critical
patent/GB1117237A/en

1968-06-19
Publication of GB1117237A
publication
Critical
patent/GB1117237A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

G—PHYSICS

G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING

G21C—NUCLEAR REACTORS

G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements

G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit

G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements

G21C3/34—Spacer grids

G21C3/3416—Spacer grids formed by metallic wires, e.g. springs

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE

Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E30/00—Energy generation of nuclear origin

Y02E30/30—Nuclear fission reactors

Abstract

1,117,237. Fuel elements. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 22 Oct., 1965 [30 Oct., 1964], No. 44459/64. Heading G6C. A spacer grid for a clustertype fuel element comprises a surround defining the boundary of the grid, at least two sets of wires or rods secured to and traversing the surround so that each set crosses another set and with it defines cells for accommodating fuel rods, and a closed loop carried by the wires or rods at each position where one crosses another, each loop being capable of limited movement relative to the wires or rods which carry it and serving, in association with adjacent loops, for contacting and locating a fuel rod in each of the cells. As shown in Fig. 1, the surround is constituted by a framework 2 of strip material bent into a square shape in plan view with its ends butt-welded together. The framework 2 has the wires or rods 6 secured to it by ferrules 5 screwed on to the ends of the wires or rods, the ferrules 5 being accommodated in apertures 4 in inwardly recessed portions 3 of the framework 2 and having heads 16 of larger diameter than the apertures 4. Each head 16 has a lateral groove by means of which it can be engaged and turned, whereby the grip of the closed loops 7 on the fuel rods 9 can be varied. The loops 7 which are circular in plan are bent in end view so that they can be threaded on to the wires or rods 6 at the crossing points. Dimples 10 are provided in the framework 2 between adjacent recesses 3 to contact the fuel rods 9 in the outer cells 8 (except the ” corner ” cells). The spacer grid is positioned within the outer casing 11 of the fuel element by dimples 12 provided in the framework 2 below that portion in which the recesses 3 and apertures 4 are provided. The framework 2 is slitted between the dimples 12 and the apertures 3 to allow the upper part of the framework 2 to bend inwardly on applying tension to the wires or rods 6 without affecting the lower part of the framework 2 and thereby its location, via the dimples 12, in the casing 11. The spacer grid may be longitudinally located in the casing 11 by means of the ” corner ” fuel rods 9 which are made up from sections corresponding in length to the longitudinal spacing between spacer grids. One section 14 as shown in Fig. 4, terminates above the spacer grid and has an end cap 15 provided with a screw-threaded spigot 17 engaging a screw-threaded aperture 18 in an end cap 19 of another section 20 below the spacer grid. The end cap 19 has a recess 21 in which is accommodated a ring 22 carried in arcuate portions 23 of a generally triangular corner cell assembly 24 secured along two of its sides to the framework 2 by spot welding or brazing. A shim 26 is provided between abutting faces of the end caps 15, 19 and serves also to retain the ring 22 in the recess 21. A locking pin 27 is employed to prevent unscrewing of the spigot 17 from the aperture 18. An alternative means for longitudinal location of each spacer grid resides in omitting the framework 2 and mounting the ferrules 5 directly in apertures in the casing 11, in which case the corner cell assemblies 24 need only locate with and not be connected to corner fuel rods, which are of full assembly length and not divided. As a further alternative, the wires or rods 6 can be adjusted to tighten the hold of the loop 7 on the fuel rods 9 sufficiently to locate the spacer grid longitudinally, in which all the fuel rods may be of full assembly length and not divided.

GB44459/64A
1964-10-30
1964-10-30
Improvements in or relating to nuclear reactor fuel assemblies

Expired

GB1117237A
(en)

Priority Applications (1)

Application Number
Priority Date
Filing Date
Title

GB44459/64A

GB1117237A
(en)

1964-10-30
1964-10-30
Improvements in or relating to nuclear reactor fuel assemblies

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

GB44459/64A

GB1117237A
(en)

1964-10-30
1964-10-30
Improvements in or relating to nuclear reactor fuel assemblies

Publications (1)

Publication Number
Publication Date

GB1117237A
true

GB1117237A
(en)

1968-06-19

Family
ID=10433380
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB44459/64A
Expired

GB1117237A
(en)

1964-10-30
1964-10-30
Improvements in or relating to nuclear reactor fuel assemblies

Country Status (1)

Country
Link

GB
(1)

GB1117237A
(en)

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

CN109979630A
(en)

2017-12-27
2019-07-05
核动力运行研究所
A kind of fuel rod plug positioning device and method for fuel assembly reparation

1964

1964-10-30
GB
GB44459/64A
patent/GB1117237A/en
not_active
Expired

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

CN109979630A
(en)

2017-12-27
2019-07-05
核动力运行研究所
A kind of fuel rod plug positioning device and method for fuel assembly reparation

Contact information