GB1240871A - Reactor core with removable core elements - Google Patents
Reactor core with removable core elementsInfo
- Publication number
- GB1240871A GB1240871A GB00602/70A GB1060270A GB1240871A GB 1240871 A GB1240871 A GB 1240871A GB 00602/70 A GB00602/70 A GB 00602/70A GB 1060270 A GB1060270 A GB 1060270A GB 1240871 A GB1240871 A GB 1240871A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- core elements
- keys
- elements
- graphite
- Prior art date
- 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
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C1/00—Reactor types
- G21C1/04—Thermal reactors ; Epithermal reactors
- G21C1/06—Heterogeneous reactors, i.e. in which fuel and moderator are separated
- G21C1/08—Heterogeneous reactors, i.e. in which fuel and moderator are separated moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor
- G21C1/10—Heterogeneous reactors, i.e. in which fuel and moderator are separated moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor moderator and coolant being different or separated
- G21C1/12—Heterogeneous reactors, i.e. in which fuel and moderator are separated moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor moderator and coolant being different or separated moderator being solid, e.g. Magnox reactor or gas-graphite reactor
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C5/00—Moderator or core structure; Selection of materials for use as moderator
- G21C5/02—Details
- G21C5/08—Means for preventing undesired asymmetric expansion of the complete structure ; Stretching devices, pins
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C5/00—Moderator or core structure; Selection of materials for use as moderator
- G21C5/02—Details
- G21C5/10—Means for supporting the complete structure
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
1,240,871. Reactors. UNITED STATES ATOMIC ENERGY COMMISSION. 5 March, 1970 [4 April, 1969], No. 10602/70. Heading G6C. In the top layer of a reactor core formed from core elements stacked in columns, the core elements are interlocked by means including loose, shared keys extending between keyways in pairs of adjacent core elements, these keys being readily slideable from the keyway in one of a pair of adjacent core elements with removal of the other of the pair. In a reactor core refuelled by an " off-line " operation, a combination of loose keys 23 and fixed keys 26 is used, as in the embodiment shown in Figs. 4 and 8, the reactor being shut down and a group of core elements in the top layer removed prior to removing core elements from the next lower layer. The topmost core element 13 in each column is formed of metal clad graphite blocks 28 of hexagonal cross-section. The metal cladding 27 covers the sides and tops of the graphite blocks 28, there being a graphite to graphite interface with the next lower core elements. The reflector core elements are formed of solid graphite blocks while the fuel-bearing core elements have coated carbide particles packed in vertical bores in the graphite blocks. Each topmost core element 13 has a central opening 29 for receiving the grapple of a refuelling machine, a metal tube extending from this opening through a central bore in the graphite block 28 to an annular bottom plate. The lower, unclad core elements likewise have grapple-receiving openings. The topmost core elements 13 are of the plenum kind, a hollow chamber 39 extending between the top cladding wall 33 and the upper face 41 of the graphite block 28. Cooling gas flows into the chamber 39 through an opening 45 in the cladding 27 and then down through a series of passageways 44 in the block 28 which are aligned with similar passageways in the lower core element blocks. The core elements in the lower layers are interlocked to each other and to the top layer core elements by means of locating dowels 18 projecting across the interfaces into sockets in the lower surfaces of the adjacent core elements. Six of the fuel-bearing core elements are grouped around a control rodbearing core element, the arcuate edges 47 of the openings 45 forming a circular-shaped opening for admitting cooling gas into one refuelling region. Each refuelling region of seven elements is supported on one support block (Fig. 1, not shown) having a central coolant passage to receive cooling gas from the converging coolant passageways in the lower reflector core element immediately above it. The keyways 24 for the loose shared keys 23 are formed in vertical bars 69 welded inside the side walls of the metal cladding 27, and are of T-section. The keys 23 are of I-section and so dimensioned as to slide in pairs of adjacent keyways 24. The throat walls 71 of the keyways 24 are bevelled outwardly at their upper ends to facilitate entry of a key 23, the lower end of which is tapered with a rounded tip. The keys 23 are detained within the keyways 24 by detent mechanism each having a spring-biased plunger with a rounded nose 89 for projecting into a narrow detent groove 74. When a key 23 is being lifted with one of its core elements, the lower ends of the flanges of its I-section may bottom on the lower ends of the keyway 24 in the rising core element to overcome any resistance to the key sliding upwardly in the keyway of the adjacent stationary core element. When the rising key brings its detent noses 89 into engagement with the top end of the detent groove 74 in the stationary core element, the noses are cammed back until the key is lifted clear of the stationary core element. The loose shared keys 23 are on the three sides of the core elements facing outwards from a refuelling region and connecting with core elements in other refuelling regions, two of the remaining three sides having fixed keys 26 of rectangular section with a lower pointed nose 93 for insertion into an enlarged flared slot 95 of a keyway 96 having a similar rectangular section, and the third of the remaining three sides having a keyway 96. In a reactor core refuelled by an " on-line " operation, only loose keys 23 are used (Fig. 17, not shown) and each one of a vertical column of core elements is removed before the removal of another top layer core element in another column.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81345069A | 1969-04-04 | 1969-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1240871A true GB1240871A (en) | 1971-07-28 |
Family
ID=25212401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB00602/70A Expired GB1240871A (en) | 1969-04-04 | 1970-03-05 | Reactor core with removable core elements |
Country Status (2)
Country | Link |
---|---|
US (1) | US3607643A (en) |
GB (1) | GB1240871A (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3804711A (en) * | 1970-10-20 | 1974-04-16 | Nuclear Power Group Ltd | Nuclear reactor |
DE2162171C3 (en) * | 1971-12-15 | 1979-09-20 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Bracing system for core elements of a reactor core |
US4040902A (en) * | 1975-04-03 | 1977-08-09 | General Atomic Company | Method for axially shuffling fuel elements in a nuclear reactor |
US4121973A (en) * | 1975-12-17 | 1978-10-24 | General Atomic Company | Nuclear reactor with fuel column coolant regulation |
US4113563A (en) * | 1976-01-06 | 1978-09-12 | Westinghouse Electric Corp. | Fuel arrangement for high temperature gas cooled reactor |
US3994775A (en) * | 1976-02-25 | 1976-11-30 | The United States Of America As Represented By The United States Energy Research And Development Administration | Control rod system useable for fuel handling in a gas-cooled nuclear reactor |
FR2361616A1 (en) * | 1976-08-12 | 1978-03-10 | Ght Hochtemperaturreak Tech | CONTAINER SUBJECT TO HIGH AND VARIABLE TEMPERATURES, IN PARTICULAR CONTAINER WITH BALL REACTORS |
DE2643275C2 (en) * | 1976-09-25 | 1978-09-28 | Hochtemperatur-Kernkraftwerk Gmbh (Hkg) Gemeinsames Europaeisches Unternehmen, 4701 Uentrop | SIDE REFLECTOR FOR HIGH TEMPERATURE CORE REACTORS |
DE2718493A1 (en) * | 1977-04-26 | 1978-11-02 | Hochtemperatur Reaktorbau Gmbh | SUPPORTING DEVICE FOR THE CORE OF A GAS-COOLED HIGH TEMPERATURE REACTOR HIGH PERFORMANCE |
DE2817540A1 (en) * | 1978-04-21 | 1979-10-25 | Hochtemperatur Reaktorbau Gmbh | CEILING REFLECTOR FOR A GAS-COOLED BALL HEAD REACTOR AND METHOD FOR REMOVING THE CEILING REFLECTOR |
US4569820A (en) * | 1981-05-13 | 1986-02-11 | Ga Technologies Inc. | Nuclear reactor core and fuel element therefor |
WO2008092237A1 (en) * | 2007-02-02 | 2008-08-07 | Les Matériaux De Construction Oldcastle Canada, Inc. | Wall with decorative facing |
US9206599B2 (en) | 2007-02-02 | 2015-12-08 | Les Materiaux De Construction Oldcastle Canada, Inc. | Wall with decorative facing |
US9670640B2 (en) | 2010-09-28 | 2017-06-06 | Les Materiaux De Construction Oldcastle Canada, Inc. | Retaining wall |
US9441342B2 (en) | 2010-09-28 | 2016-09-13 | Les Materiaux De Construction Oldcastle Canada, In | Retaining wall |
CA2806259C (en) | 2010-09-28 | 2014-04-22 | Les Materiaux De Construction Oldcastle Canada, Inc. | Retaining wall |
WO2014127486A1 (en) | 2013-02-25 | 2014-08-28 | Les Materiaux De Construction Oldcastle Canada Inc. | Wall assembly |
US20210375495A1 (en) * | 2020-05-28 | 2021-12-02 | Bwxt Nuclear Energy, Inc. | Nuclear reactor fuel assemblies and process for production |
-
1969
- 1969-04-04 US US813450A patent/US3607643A/en not_active Expired - Lifetime
-
1970
- 1970-03-05 GB GB00602/70A patent/GB1240871A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3607643A (en) | 1971-09-21 |
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