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GB782922A - Improvements in or relating to moderator and reflector structures for nuclear reactors - Google Patents

Improvements in or relating to moderator and reflector structures for nuclear reactors

Info

Publication number
GB782922A
GB782922A GB36075/54A GB3607554A GB782922A GB 782922 A GB782922 A GB 782922A GB 36075/54 A GB36075/54 A GB 36075/54A GB 3607554 A GB3607554 A GB 3607554A GB 782922 A GB782922 A GB 782922A
Authority
GB
United Kingdom
Prior art keywords
tubes
moderator
links
restraint
bands
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
Application number
GB36075/54A
Inventor
Everett Long
Frank Geoffrey Greenhalgh
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.)
Filing date
Publication date
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to US552662A priority Critical patent/US2865828A/en
Publication of GB782922A publication Critical patent/GB782922A/en
Priority to FR1211878D priority patent/FR1211878A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)

Abstract

782,922. Nuclear reactors. UNITED KING- DOM ATOMIC ENERGY AUTHORITY. Dec. 6, 1955 [Dec. 13, 1954], No. 36075/54. Class 39(4). A restraint for keeping the moderator structure of a nuclear reactor stable whilst allowing for dimensional changes in the lifetime of the reactor comprises a series of elastic bands around the structure, each band comprising a series of joined links and each link comprising a nest of coaxial tubes, the tubes in each nest being end-loaded one against the other so that alternate tubes accept equal tensile and compressive loads respectively, couplings between adjacent links from the innermost tube at one link to the outermost tube of the adjacent link, and means for transmitting the tensions in the bands as a centrifugal load to the walls of the moderator structure. Referring to Fig. 1, the moderator structure 10 is in the form of a twenty-four sided prism constructed of blocks arranged in layers. Each layer is restrained from radial expansion by an elastic band comprising twenty-four links 12 with pin joints 14 between the links. The joints 14 are held by a bracket welded to angle section restraint beams 16, Fig. 3a, which press against the walls of the structure. The restraint beam 16 of the bottom layer is provided with twenty-four extensions 19 which are bolted to a grid 26 which is maintained coaxial with the surrounding pressure vessel 17 so that both radial and sideways movement of the moderator structure is prevented whilst radial growth is permitted. Fig. 4 shows the construction of one of the links 12 which comprises nests of tubes 28, 29, the tubes 28 being in compression between the ends 30 of tubes 29 which are in tension. At one end an end-piece 32 is welded to the end piece of the outermost tube, whilst at the other end a tie bar 35 is threaded to accommodate a bush 34 which is located in a forked end 37. For the intermediate restraint bands the tubes 28, 29 and the tie bar 35 are of mild steel, and for the top and bottom bands the tubes 28 are of stainless steel. Fig. 6 shows how the graphite moderator and reflector structure is built up. In the moderator part, vertical graphite blocks with central fuel element channels are spaced apart to allow for growth by two layers of tiles 47, 48 ; the tiles 47 have their " North/South " faces in contact and their " East /West " faces spaced apart and the tiles 48 have the reverse arrangement. The blocks of the reflector part 10b are not spaced apart as the radiation is not sufficient to cause appreciable growth in them.
GB36075/54A 1954-12-13 1954-12-13 Improvements in or relating to moderator and reflector structures for nuclear reactors Expired GB782922A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US552662A US2865828A (en) 1954-12-13 1955-12-12 Moderator and reflector structures for nuclear reactors
FR1211878D FR1211878A (en) 1954-12-13 1958-12-19 Retarder and reflector structures for nuclear reactors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3577/58A GB855358A (en) 1958-02-04 1958-02-04 Improvements in or relating to moderator and reflector structures for nuclear reactors

Publications (1)

Publication Number Publication Date
GB782922A true GB782922A (en) 1957-09-18

Family

ID=9760965

Family Applications (2)

Application Number Title Priority Date Filing Date
GB36075/54A Expired GB782922A (en) 1954-12-13 1954-12-13 Improvements in or relating to moderator and reflector structures for nuclear reactors
GB3577/58A Expired GB855358A (en) 1954-12-13 1958-02-04 Improvements in or relating to moderator and reflector structures for nuclear reactors

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3577/58A Expired GB855358A (en) 1954-12-13 1958-02-04 Improvements in or relating to moderator and reflector structures for nuclear reactors

Country Status (1)

Country Link
GB (2) GB782922A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100191B (en) * 1958-06-05 1961-02-23 Commissariat Energie Atomique Tension belt for the moderator block of a nuclear reactor
DE1101634B (en) * 1958-02-22 1961-03-09 Babcock & Wilcox Dampfkessel Clamping and holding device for a nuclear reactor
DE1108341B (en) * 1958-02-18 1961-06-08 Atomic Energy Authority Uk Link for the holding system of the graphite structure of a nuclear reactor
DE1118372B (en) * 1957-11-08 1961-11-30 Commissariat Energie Atomique Holding system to ensure the stability of a stack of moderator and reflector blocks in a nuclear reactor
DE1118900B (en) * 1957-10-21 1961-12-07 Atomic Energy Authority Uk Graphite moderator structure for nuclear reactors
DE1123056B (en) * 1958-06-05 1962-02-01 Commissariat Energie Atomique Horizontal circumferential tension belt for holding together a nuclear reactor moderator block made up of bars placed vertically on top of one another
US3061532A (en) * 1956-12-03 1962-10-30 Commissariat Energie Atomique Piles of nuclear reactor elements and in particular of moderator material elements
US3105805A (en) * 1957-07-01 1963-10-01 Atomic Energy Authority Uk Nuclear reactor moderator structures
DE1175802B (en) * 1958-08-21 1964-08-13 Commissariat Energie Atomique Moderator stacks for nuclear reactors
DE1219595B (en) * 1958-10-18 1966-06-23 Commissariat Energie Atomique Stacked moderator block structure of a nuclear reactor
DE1281591B (en) * 1957-10-22 1968-10-31 Commissariat Energie Atomique Nuclear reactor with a graphite moderator structure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124514A (en) * 1964-03-10 koutz etal
SE419007B (en) * 1978-03-21 1981-07-06 Asea Atom Ab DEVICE FOR SUPPLYING THE WATER WATER TO A MAJOR CYLINDRICAL, VERTICAL REACTOR TANK

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061532A (en) * 1956-12-03 1962-10-30 Commissariat Energie Atomique Piles of nuclear reactor elements and in particular of moderator material elements
US3105805A (en) * 1957-07-01 1963-10-01 Atomic Energy Authority Uk Nuclear reactor moderator structures
DE1118900B (en) * 1957-10-21 1961-12-07 Atomic Energy Authority Uk Graphite moderator structure for nuclear reactors
DE1281591B (en) * 1957-10-22 1968-10-31 Commissariat Energie Atomique Nuclear reactor with a graphite moderator structure
DE1118372B (en) * 1957-11-08 1961-11-30 Commissariat Energie Atomique Holding system to ensure the stability of a stack of moderator and reflector blocks in a nuclear reactor
DE1108341B (en) * 1958-02-18 1961-06-08 Atomic Energy Authority Uk Link for the holding system of the graphite structure of a nuclear reactor
DE1101634B (en) * 1958-02-22 1961-03-09 Babcock & Wilcox Dampfkessel Clamping and holding device for a nuclear reactor
DE1100191B (en) * 1958-06-05 1961-02-23 Commissariat Energie Atomique Tension belt for the moderator block of a nuclear reactor
DE1123056B (en) * 1958-06-05 1962-02-01 Commissariat Energie Atomique Horizontal circumferential tension belt for holding together a nuclear reactor moderator block made up of bars placed vertically on top of one another
DE1175802B (en) * 1958-08-21 1964-08-13 Commissariat Energie Atomique Moderator stacks for nuclear reactors
DE1219595B (en) * 1958-10-18 1966-06-23 Commissariat Energie Atomique Stacked moderator block structure of a nuclear reactor

Also Published As

Publication number Publication date
GB855358A (en) 1960-11-30

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