Classifications

• • 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
  • G21F5/00—Transportable or portable shielded containers
  • G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal
  • G21F5/008—Containers for fuel elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
  • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
  • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
  • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
• • 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
  • G21C19/26—Arrangements for removing jammed or damaged fuel elements or control elements; Arrangements for moving broken parts thereof
• • 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
  • G21C19/32—Apparatus for removing radioactive objects or materials from the reactor discharge area, e.g. to a storage place; Apparatus for handling radioactive objects or materials within a storage place or removing them therefrom
• • 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
  • G21F5/00—Transportable or portable shielded containers
  • G21F5/06—Details of, or accessories to, the containers
  • G21F5/12—Closures for containers; Sealing arrangements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
  • F26B25/06—Chambers, containers, or receptacles
• • 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 invention relates to a method and a device for encapsulating a fuel rod or a Brennstabab ⁇ section for temporary storage.
• defective fuel rods or fuel rod sections are introduced into containers or capsules in a vacuum-tight and fluid-tight manner, as described, for example, in DE 196 40 393 B4, EP 1 248 270 A1, EP 1 600 982 B1 and WO 2010 / 084122 AI are known. Because the encapsulation of a
• a cap is provided as the closure element, which is pushed onto a hollow-lindharis container part and connected to the Stirnflä ⁇ che cohesively.
• the closing of the Benzol ⁇ ters takes place in a fluid-tight chamber.
• the liquid in the chamber is withdrawn resistance and then a vacuum drying Runaway ⁇ leads. Due to the inside of a fuel rod be published ⁇ th vessel between the fuel rod and inner wall of the container present narrow column, residual water may remain in the container under certain circumstances.
• the invention is therefore based on the object of specifying a method for encapsulating a fuel rod or a Brennstababschnit- tes in which it is enclosed in a gastight manner and in a container, and with which it is possible to quantify ⁇ tative statement on the content of residual water in the To meet containers.
• the invention is also based on the object to provide a device with which a fuel rod or a fuel rod portion containing container with a known content of residual water can be closed.
• the container is rinsed again with flushing gas before closing.
• a device for encapsulating a fuel rod or fuel rod section in a container comprises the following features:
• the device has a first and a second chamber
• first and second chambers are spaced apart and arranged on a common system axis, c) first and second chambers are provided with a first and second opening for receiving an opening into the chamber Freiendes the container such that the first and second chamber can be fluidly connected to each other between these arranged only through this container, d) the The first chamber is connected to an inlet line and the second chamber to an outlet line for a purge gas, e) inlet line and outlet are connected via a bypass line extending outside the chambers in such a way that a closed gas circuit is formed, wherein in the gas circuit, a pump and a heater for Circulation or heating of a gas cycle located in the heating gas are arranged,
• f) in the gas cycle are measuring devices for detecting the absolute moisture content of the second chamber in the
• each chamber has means for closing the container.
• the first and second chambers are rigidly connected to one another via a connecting tube along the system axis, into which the container can be inserted in such a way that it projects beyond the connecting tube with its free ends.
• At least one sealing element is arranged between the container and the connecting tube, which is adjustable in such a way that the chambers are fluidically connected to one another exclusively via the container.
• an adjustable sealing element is arranged at both ends of the connecting tube, a connection is made between the container and the connecting tube, a cylindrical gap formed, which is closed fluid-tight with respect to the chambers.
• a device for fluid-tight mounting of a plurality of containers, in each of which a fuel rod or fuel rod section is encapsulated comprises the following features:
• a capsule quiver having a plurality of grid-shaped spacers
• a suction lance passed through the hood and through a cover displaceably mounted in the hood for sucking off water in the capsule quiver (222); d) the hood has an inlet and an outlet for a purge gas and a heating gas,
• a measuring device for measuring the absolute moisture content of the hot gas emerging from the container is arranged at the outlet
• FIGS. 3-7 show a device according to the present invention for the fluid-tight mounting of a plurality of containers in each of which a fuel rod or Fuel rod section is encapsulated, in the implementation of temporally successive steps.
• FIG. 1 a provided with a fuel rod 20 Benzol ⁇ ter has been introduced into a device 2 in which the residual water in the container 2 is removed from the container 2 and in which it after the reduction of the Restwassergehal- tes on one or is sealed gas-tight below a predetermined maximum zuläs ⁇ sigen limit value.
• the dashed line in the figure ⁇ drawn fuel rod 20 has been introduced into the container 2, on the ends of a, for example, from EP 1 600 982 Bl known closure element 10 is screwed in an intermediate position on ⁇ .
• the device comprises a first and a second chamber 50, 52, which are arranged spaced apart on a common system axis 53.
• the first and second chambers 50, 52 are rigidly connected to one another along this system axis 53 via a connecting tube 100 which is open at both ends.
• the ends of the connecting pipe 100 formed in the first and th two ⁇ chamber 50, 52 a first and second opening 56, 57 by an inserted into the connecting pipe 100 container 2 with its free ends via the connecting pipe 100 out into the chambers 50, 52 protrudes.
• connecting pipe 100th and the container 2 deliverable sealing elements 116 are arranged in the region of these free ends, which close the existing between connecting tube 100 and container 2 cylindrical gap space 119, so that the first and second chamber 50, 52 fluidly connected with itself between this arranged container 2 exclusively on this itself can be.
• the container 2 provided with the closure element 10 is mounted in a rotationally fixed manner in the second chamber 52 in a receptacle 200 adapted to the closure element 10.
• a handling tool 202 is inserted, which engages around the closure element 10 torque-locking and with which the two closure elements 10 can be screwed to the container 2 in a gas-tight end position.
• an inlet line 66 is connected to a purge gas G, which flows through the container 2 into the second chamber 52 and leaves it via an outlet conduit 69.
• Inlet line 66 and outlet line 69 are connected via valves 134 and 136 to a outside of the chambers 50,52 ver ⁇ running bypass line 118, so that by
• a closed gas cycle is formed whose volume exceeds the free volume of the container 2 by orders of magnitude and a multiple, more than a 10-fold, im Embodiment is about 50 times this volume.
• a pump 140 and a heater 142 for circulating or heating of a gas in the gas cycle heating gas H are arranged.
• measuring devices 150, 152 and 154 are arranged in the gas cycle, with which the temperature temperature, the relative humidity or the pressure of the inflowing into the first chamber 50 and out of the second chamber 52 heating gas H can be measured.
• the connecting tube 100 is also surrounded by an outer tube 202 arranged between the chambers 50, 52, which is connected to a heating circuit 204, in which a fluid medium M heated with a heater 206 is likewise circulated by means of a pump 208, so that the connection tube 100 is thermally isolated from the environment.
• a thermal insulation and by a ⁇ bringing of heat-insulating material or heating elements between connecting pipe 100 and outer pipe 202 are obtained.
• the deliverable sealing members 116 are opened, and by blowing purge gas G, the processing chambers 50, 52 and the clearance space 119 are dehydrated via the exhaust passage 69.
• the gap space 119 is closed with the sealing elements 116 and the water contained in the container 2 between the fuel rod 20 and the inner wall of the container 2 is expelled with the aid of the purge gas G.
• the valves 126, 130 are closed and the valves 134 and 136 located in the bypass line 118 are opened.
• the heating gas H located in the bypass line 118 is continuously circulated in this closed gas cycle.
• the temperature, the moisture content and the pressure of the flowing gas flowing in the gas cycle H are detected.
• the precisely measured with ⁇ nen in the outlet line 69 values for pressure, temperature and relative moisture content of the absolute water or moisture contained in the fuel gas can be H te content in kg / m 3 are determined and its temporal development ⁇ ment be included.
• this absolute moisture content X in curve a is plotted against the time t.
• the figure shows that the absolute moisture content X from the time to, from which the heating gas is circulated in the gas cycle, steadily increases until it reaches a constant maximum value X max in a plateau. The achievement of this final value X max indicates that it is within the closed gas cycle
• the absolute mass of the water vapor present in the container 2 can now be determined in grams with known free volume of the container 2 and the fuel rod 20. After reaching the final value X max , the valves 134 and 136 are closed. Thus, the amount of in ⁇ ner vom the container 2 is still known water.
• the container 2 could then be sealed gas-tight.
• the valves 126 and 130 are opened again and the container 2 is rinsed again with purge gas G.
• the water vapor contained in the container 2 and in the Brennstabplena is madetrie ⁇ ben, so that the amount of befindli ⁇ within the container 2 chen water is additionally reduced.
• the previously determined remaining amount may be regarded as an upper value which is larger than the actual remaining amount.
• the container 2 can then be welded to the closure elements 10 or subjected to a further treatment explained below. In this subsequent treatment, the container 2 is removed from the device and placed by means of a handling tool 220 in a capsule quiver 222, which is shown in Fig.
• the ⁇ ser capsule quiver 222 is for receiving a plurality of loading food holding 2 is provided.
• a plurality of loading food holding 2 is provided in the capsule quiver 222 .
• a plurality of axially spaced grid-shaped spacers 229 arranged in the cells of the container 2 are guided.
• a cover 230 is placed on the receiving tube 224, which has a central suction lance 232 which leads to the bottom of the capsule holder 222 and serves to suck off water in the capsule quiver 222.
• a hood 234 is fitted in a fluid-tight manner, through which a suction line 236 is passed, which is connected via an in the
• Cover 230 located opening 237 is connected to the suction lance 232 fluid ⁇ .
• water is sucked with simultaneous supply of purge gas G via an insertion port 238.
• heating gas H is supplied via the introduction opening 238 and discharged via the suction line 236.
• the heating gas H is not performed in a closed circuit.
• the temperature, relative humidity and pressure at the outlet are determined, from which the current absolute moisture content X is determined becomes, which decreases steadily with increasing duration of the drying process.
• the time profile of the absolute moisture content X is shown simplified in the diagram of FIG. 2 in curve b.
• the heating gas H is gelei ⁇ tet through the capsule quiver 222 until the absolute moisture content X a predetermined
• Limit X g reached or fallen below.
• the time profile of the absolute moisture content X is shown in the diagram of FIG. 2 in curve b. This ensures that the absolute content of the inside of the capsule quiver 222 befindli ⁇ chen water does not exceed predetermined maximum values. In this way, a reliable statement is possible as to whether pre ⁇ given limits are met. After drying the capsule bag 222 is shown in FIG. 5 of
• the opening 237 located in the cover 230 is likewise welded to the suction lance 232.
• ultrasonic testing devices may optionally be arranged in the hood 234, with which a check of the welds is possible.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Engineering & Computer Science (AREA)
• High Energy & Nuclear Physics (AREA)
• Plasma & Fusion (AREA)
• Mechanical Engineering (AREA)
• Monitoring And Testing Of Nuclear Reactors (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• Molecular Biology (AREA)
• Microbiology (AREA)

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Citations (8)

Family Cites Families (13)

• 2013
  • 2013-02-28 CN CN201380012100.XA patent/CN104145310B/zh active Active
  • 2013-02-28 EP EP16155068.6A patent/EP3048614B1/de active Active
  • 2013-02-28 ES ES16155068.6T patent/ES2665850T3/es active Active
  • 2013-02-28 WO PCT/EP2013/053989 patent/WO2013127894A1/de not_active Ceased
  • 2013-02-28 ES ES13710803.1T patent/ES2606337T3/es active Active
  • 2013-02-28 CN CN201610141025.2A patent/CN105810272B/zh active Active
  • 2013-02-28 JP JP2014559206A patent/JP6530193B2/ja not_active Expired - Fee Related
  • 2013-02-28 EP EP13710803.1A patent/EP2820654B1/de active Active
• 2014
  • 2014-08-08 ZA ZA2014/05830A patent/ZA201405830B/en unknown
  • 2014-09-02 US US14/474,448 patent/US9916912B2/en active Active
• 2017
  • 2017-02-15 US US15/432,964 patent/US10332645B2/en active Active

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