WO2015195111A1 - Système de fermeture de tube de transfert de carburant installé à distance - Google Patents

Système de fermeture de tube de transfert de carburant installé à distance Download PDF

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Publication number
WO2015195111A1
WO2015195111A1 PCT/US2014/042906 US2014042906W WO2015195111A1 WO 2015195111 A1 WO2015195111 A1 WO 2015195111A1 US 2014042906 W US2014042906 W US 2014042906W WO 2015195111 A1 WO2015195111 A1 WO 2015195111A1
Authority
WO
WIPO (PCT)
Prior art keywords
bolt
flange cover
flange
fuel transfer
transfer tube
Prior art date
Application number
PCT/US2014/042906
Other languages
English (en)
Inventor
JR. Bernard DEFAZIO
Original Assignee
Preferred Utilities Manufacturing Corporation
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 Preferred Utilities Manufacturing Corporation filed Critical Preferred Utilities Manufacturing Corporation
Priority to PCT/US2014/042906 priority Critical patent/WO2015195111A1/fr
Publication of WO2015195111A1 publication Critical patent/WO2015195111A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/115—Caps
    • F16L55/1152—Caps fixed by screwing or by means of a screw-threaded ring
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/19—Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F7/00—Shielded cells or rooms
    • G21F7/005—Shielded passages through walls; Locks; Transferring devices between rooms
    • 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

Definitions

  • the manual installation of the flange cover on the fuel transfer tube flange involves two to three operators dressed in contamination protective clothing including filtered air hood or respiratory devices and about an hour to remove the flange cover and about two hours to reinstall it.
  • the containment area is hot and contains sufficient radiologic contamination to expose the operators to significant radiation.
  • These operations are performed in an environment that could have as high as three rem per hour after each refueling. It is known that the longer an operator stays in proximity to radioactive material the greater his/her radiation exposure and therefore it is preferable to minimize any such exposure below the permissible radiation levels specified by government regulations. It is desirable therefore to be able to remove and replace the flange cover so as to reduce both the refueling time and operator radiation exposure.
  • Figure 11 is a side schematic plan view of the installation/removal tool frame of Figure 9;
  • the disk springs 34 are arranged in sets of parallel and series springs to allow extension of the J-bolt foot 20 in its non-clamping operative position past the rear side of the fuel transfer tube fixed flange 80 as shown in Fig.6 and rotated to its clamping operative position as shown in Fig. 7, and to provide sufficient residual clamping force to maintain an O-ring seal under the design conditions as described herein above and as shown in Fig. 8.
  • the disk springs 34 mounted on the J-bolts 19, 19 serve to keep the J-bolt foot 20 fully against the rear sealing face 66 of the flange cover assembly 10 when the disk springs 34 are relaxed as shown in Fig. 5.
  • hose is connected to the test connection fitting 69 and remains permanently attached to the flange cover assembly 10.
  • the opposite end of the hose is removed from the test equipment and tied off on the refuel fuel available if further testing is required.
  • Fig. 16 a schematic flow chart showing the functional steps of the method embodying the present invention for remotely installing a flange cover assembly on a fuel transfer tube fixed flange is illustrated therein and generally designated 130.
  • the method includes in step 132 providing a flange cover assembly suitably dimensioned to cover the opening in the fuel transfer tube located in the containment pit of the nuclear power plant.
  • the flange cover assembly is next lowered in step 134 down into the containment pit onto resting engagement and alignment with the fuel transfer tube fixed flange.
  • Water is returned to the water reservoir 180 via the conduit 183 by operation of the 4-way valve 184 and 2- way valve 182 in a well-known manner. It will be noted that the hydraulic system and associated controls are at the refuel floor level as are the connections to the hydraulic hoses.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

L'invention concerne un système, un procédé et un appareil pour installer à distance un ensemble couvercle de bride sur une bride fixe de tube de transfert de carburant dans une fosse de confinement dans une centrale nucléaire. Dans un exemple, l'ensemble couvercle de bride comprend des blocs de ressorts de boulon en J dans lesquels les pieds du boulon en J pivotent entre une orientation de serrage et une orientation de non-serrage pour coopérer avec la face arrière de la bride fixe. Un cadre d'outil est descendu dans la fosse de confinement pour coopérer avec l'ensemble couvercle de bride pour comprimer les ressorts de boulon en J et rapprocher et éloigner le pied du boulon en J du couvercle de bride. Des cylindres à double action déplacent un cadre de compression de ressort sur le cadre d'outil pour comprimer et détendre les blocs de ressorts de boulon en J.
PCT/US2014/042906 2014-06-18 2014-06-18 Système de fermeture de tube de transfert de carburant installé à distance WO2015195111A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2014/042906 WO2015195111A1 (fr) 2014-06-18 2014-06-18 Système de fermeture de tube de transfert de carburant installé à distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2014/042906 WO2015195111A1 (fr) 2014-06-18 2014-06-18 Système de fermeture de tube de transfert de carburant installé à distance

Publications (1)

Publication Number Publication Date
WO2015195111A1 true WO2015195111A1 (fr) 2015-12-23

Family

ID=54935923

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/042906 WO2015195111A1 (fr) 2014-06-18 2014-06-18 Système de fermeture de tube de transfert de carburant installé à distance

Country Status (1)

Country Link
WO (1) WO2015195111A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519519A (en) * 1982-02-26 1985-05-28 Westinghouse Electric Corp. Fuel transfer tube quick opening hatch
US4678620A (en) * 1984-07-23 1987-07-07 Westinghouse Electric Corp. Hatch assembly
US5349614A (en) * 1993-03-22 1994-09-20 General Electric Company Steam line plug installation tool
US5625655A (en) * 1994-07-29 1997-04-29 Combustion Engineering, Inc. Fuel transfer tube quick operating remote closure device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519519A (en) * 1982-02-26 1985-05-28 Westinghouse Electric Corp. Fuel transfer tube quick opening hatch
US4678620A (en) * 1984-07-23 1987-07-07 Westinghouse Electric Corp. Hatch assembly
US5349614A (en) * 1993-03-22 1994-09-20 General Electric Company Steam line plug installation tool
US5625655A (en) * 1994-07-29 1997-04-29 Combustion Engineering, Inc. Fuel transfer tube quick operating remote closure device

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