GB1295283A

GB1295283A – – Google Patents

GB1295283A – – Google Patents

Info

Publication number
GB1295283A

GB1295283A
GB1770269A
GB1295283DA
GB1295283A
GB 1295283 A
GB1295283 A
GB 1295283A
GB 1770269 A
GB1770269 A
GB 1770269A
GB 1295283D A
GB1295283D A
GB 1295283DA
GB 1295283 A
GB1295283 A
GB 1295283A
Authority
GB
United Kingdom
Prior art keywords
tie
bar
elements
core
control rod
Prior art date
1969-04-03
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
GB1770269A
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.)
1969-04-03
Filing date
1969-04-03
Publication date
1972-11-08

1969-04-03
Application filed
filed
Critical

1972-11-08
Publication of GB1295283A
publication
Critical
patent/GB1295283A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

G—PHYSICS

G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING

G21C—NUCLEAR REACTORS

G21C7/00—Control of nuclear reaction

G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section

G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods

G21C7/10—Construction of control elements

G21C7/11—Deformable control elements, e.g. flexible, telescopic, articulated

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

1295283 Reactor control rods ENGLISH ELECTRIC CO Ltd and BRITISH NUCLEAR DESIGN & CONSTRUCTION Ltd 3 April 1970 [3 April 1969] 17702/69 Heading G6C A reactor control rod comprises a plurality of hollow elements of which at least some are neutron-absorptive, held end-to-end on a tiebar provided at at least one of its ends with an end piece engaging a first one of the elements, the tie-bar including intermediate its two ends at least one region at which it is separable into two parts when stressed transversely, and at least a second one of the hollow elements being provided internally with means for applying a localized transverse force to the above region in the event of the second element being forced transversely relative to the tie-bar, thereby to separate the tie-bar at this region. In one embodiment (Fig. 2), the elements 10 other than the lowermost each comprise a sleeve 11 near the lower end of which is an apertured horizontal wall 12. The lowermost element 10 is normally supported on a disc 131 secured to the lower end of a tie-bar 13 which extends upwardly through the stacked elements 10 and the apertures of their walls 12. The control rod is normally disposed within a core access tube 14 which connects a standpipe with the respective control rod channel 15 in the core 16. Adjacent to the aperture in each wall 12 the tie-bar 13 is provided with a release mechanism 17, preferably a frangible segment, e.g. of sintered alumina, which snaps if subjected to a transverse force applied by the respective wall 12. Alternatively, the tie-bar could consist of a plurality of sections which between which are ball joints separate when the angular displacement of the respective sections exceeds a predetermined value. The occurrence of a serious mechanical fault in the reactor could distort the core access tube 14, as shown in Fig. 2, to jam one of the elements 10. The tie-bar 13 would then separate at the release mechanism 17 adjacent the wall 12 of the jammed element 10 to allow all the elements below the jammed element to fall into the core. At least part of the control rod will therefore fall into the core, provided the jammed element is not the lowermost element. In order that this part may be as long as possible, the lowermost element may have telescoped within it one or more additional elements.

GB1770269A
1969-04-03
1969-04-03

Expired

GB1295283A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

GB1770269

1969-04-03

Publications (1)

Publication Number
Publication Date

GB1295283A
true

GB1295283A
(en)

1972-11-08

Family
ID=10099715
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB1770269A
Expired

GB1295283A
(en)

1969-04-03
1969-04-03

Country Status (2)

Country
Link

DE
(1)

DE2014785A1
(en)

GB
(1)

GB1295283A
(en)

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US4581201A
(en)

*

1982-02-08
1986-04-08
Ab Asea-Atom
Flexible control rod for a nuclear reactor

Families Citing this family (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

DE2925861A1
(en)

*

1979-06-27
1981-01-22
Hochtemperatur Reaktorbau Gmbh
Nuclear reactor absorber rod – with string of temp. resistant saucer-shaped elements requires no cooling

1969

1969-04-03
GB
GB1770269A
patent/GB1295283A/en
not_active
Expired

1970

1970-03-26
DE
DE19702014785
patent/DE2014785A1/en
active
Pending

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US4581201A
(en)

*

1982-02-08
1986-04-08
Ab Asea-Atom
Flexible control rod for a nuclear reactor

Also Published As

Publication number
Publication date

DE2014785A1
(en)

1971-01-07

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Legal Events

Date
Code
Title
Description

1973-03-21
PS
Patent sealed

1976-10-27
PLNP
Patent lapsed through nonpayment of renewal fees

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