GB956918A - Retarding linear movement - Google Patents

Retarding linear movement

Info

Publication number
GB956918A
GB956918A GB22508/62A GB2250862A GB956918A GB 956918 A GB956918 A GB 956918A GB 22508/62 A GB22508/62 A GB 22508/62A GB 2250862 A GB2250862 A GB 2250862A GB 956918 A GB956918 A GB 956918A
Authority
GB
United Kingdom
Prior art keywords
orifice
jack
piston
holes
rod
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
GB22508/62A
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.)
Groupement Atomique Alsacienne Atlantique SA
Alsacienne Atom
Original Assignee
Groupement Atomique Alsacienne Atlantique SA
Alsacienne Atom
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 Groupement Atomique Alsacienne Atlantique SA, Alsacienne Atom filed Critical Groupement Atomique Alsacienne Atlantique SA
Publication of GB956918A publication Critical patent/GB956918A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
    • G05G7/14—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by means for delaying initiation of, or making more gradual throughout, the movement of the controlled member in response to a given input from the controlling member, e.g. by providing lost motion in the command train
    • 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
    • G21C7/12—Means for moving control elements to desired position
    • G21C7/16—Hydraulic or pneumatic drive
    • 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
    • G21C7/20—Disposition of shock-absorbing devices ; Braking arrangements
    • 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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Actuator (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Braking Arrangements (AREA)

Abstract

956,918. Fluid friction brakes; pneumatic dash-pots. GROUPEMENT ATOMIQUE ALSACIENNE ATLANTIQUE. June 12, 1962 [June 19, 1961], No. 22508/62. Headings F2E and F2S. [Also in Division G6] Means for pneumatically braking the fall of a moving object fixed to the piston of a pneumatic jack comprises a hollow rod having one or more holes at a point near its connection to the object and one or more holes longitudinally spaced therefrom, said spacing being a function of the distance through which the object falls, an orifice near the base of the cylinder wall of jack, said orifice communicating through a non-return valve with a tank; and a calibrated exhaust orifice provided in said tank. A neuclear reactor is described in which a control rod 1 is carried on a pistonrod 11 of a jack which can be operated by gas pressure to drive the control rod along inside an immersion tube 2 from the locality of a sheath 6 in a block 7 to the locality of a collar 4 in a block 5. The piston-rod 11 is tubular and has radial holes 13 and 14 at a distance apart dependent on the distance the control rod has to travel. The lower end of the jack cylinder 8 communicates with the outside by way of a non-return valve 18, a tank 16, a calibrated orifice 19 and a pipe 20. When the jack piston is moved from the dotted position in Fig. 2 to the full-line position air escapes from the space 22 through the hollow piston-rod to the space on the other side of the bearing block 12 and also out through the orifice 19. Towards the end of travel the holes 14 have moved outside the block 12 and the orifice 19 then provides a shock-absorbing effect. Finally, gas trapped in the space 22 can only escape back through a groove 21 in the cylinder wall. A spring buffer 23 is also provided.
GB22508/62A 1961-06-15 1962-06-12 Retarding linear movement Expired GB956918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR864984A FR1300805A (en) 1961-06-15 1961-06-15 Pneumatic device for braking, at the active end of travel, the control rods of a reactor

Publications (1)

Publication Number Publication Date
GB956918A true GB956918A (en) 1964-04-29

Family

ID=8757291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22508/62A Expired GB956918A (en) 1961-06-15 1962-06-12 Retarding linear movement

Country Status (5)

Country Link
DE (1) DE1205205B (en)
FR (1) FR1300805A (en)
GB (1) GB956918A (en)
LU (1) LU41832A1 (en)
NL (2) NL279716A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218079B (en) * 1964-05-13 1966-06-02 Kernforschung Gmbh Ges Fuer Device for braking the retraction movement of a safety rod in a gas-cooled nuclear reactor
US4646884A (en) * 1984-04-25 1987-03-03 Pacific Scientific Company Extended life gas spring

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232281B (en) * 1964-04-29 1967-01-12 Siemens Ag Hydraulic shock absorber for control rods of nuclear reactors

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1171822A (en) * 1957-04-23 1959-01-30 Chantiers De L Atlantique Penh Safety bar operating device for nuclear reactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218079B (en) * 1964-05-13 1966-06-02 Kernforschung Gmbh Ges Fuer Device for braking the retraction movement of a safety rod in a gas-cooled nuclear reactor
US4646884A (en) * 1984-04-25 1987-03-03 Pacific Scientific Company Extended life gas spring

Also Published As

Publication number Publication date
NL279716A (en)
NL124116C (en)
LU41832A1 (en) 1962-08-06
FR1300805A (en) 1962-08-10
DE1205205B (en) 1965-11-18

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