EP0072356A1 - Verfahren und Anlage zur Zwischenlagerung von radioaktiven Abfällen - Google Patents

Verfahren und Anlage zur Zwischenlagerung von radioaktiven Abfällen Download PDF

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Publication number
EP0072356A1
EP0072356A1 EP82830193A EP82830193A EP0072356A1 EP 0072356 A1 EP0072356 A1 EP 0072356A1 EP 82830193 A EP82830193 A EP 82830193A EP 82830193 A EP82830193 A EP 82830193A EP 0072356 A1 EP0072356 A1 EP 0072356A1
Authority
EP
European Patent Office
Prior art keywords
drums
tunnel
plant
per
machine
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.)
Granted
Application number
EP82830193A
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English (en)
French (fr)
Other versions
EP0072356B1 (de
Inventor
Mario Marena
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.)
Enel SpA
Original Assignee
Enel SpA
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Filing date
Publication date
Application filed by Enel SpA filed Critical Enel SpA
Priority to AT82830193T priority Critical patent/ATE27745T1/de
Publication of EP0072356A1 publication Critical patent/EP0072356A1/de
Application granted granted Critical
Publication of EP0072356B1 publication Critical patent/EP0072356B1/de
Expired legal-status Critical Current

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    • 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
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/20—Disposal of liquid waste
    • G21F9/22—Disposal of liquid waste by storage in a tank or other container
    • 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
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/34—Disposal of solid waste

Definitions

  • the present invention relates to a method and a plant for stowing radioactive wastes into a temporary storage with radiation shielding walls.
  • the wastes are stored within the same area of the nuclear plant from which the wastes derive, until an ultimate confinement is made available.
  • the wastes to be confined essentially comprise exhausted ion exchange resins, filter media, liquid wastes etc.
  • waste confinement comprises fixing the wastes in a concrete or bitumen mix and sealing them within steel or concrete cointainers. Such containers are then ultimately stored in controlled locations such as abandoned caves or mines, disches or galleries purposedly excavated, etc.
  • the basic concept of this invention consists of enclosing the wastes within relatively small metal containers such as readily handlable drums and of stowing them into a chamber whose walls have positive shielding capacities from the Waste radiation.
  • the drums are disposed within the chamber in such an order that the different batches and even the different drums can be singled out.
  • such a procedure implies the shielding of the drums during the transfer of them from the shielded room, where the drums are filled, to the storage building.
  • Another safety measure comprises the provision of doubled motors to ensure a continuous operation in case of failure of one of the motors.
  • a building is constructed with shielding walls wherein a number of horizontal tunnellike chambers are provided for receiving each a number of drums lying flat crosswise of the tunnel.
  • Each tunnel is shielded from the others and the whole assembly of tunnels is shielded from the outer space.
  • said building comprises two identical blocks symmetrical with respect to a gallery intervening between them, an array of tunnels being defined in each block.
  • One end of each tunnel opens towards said gallery while the other end opens towards an auxiliary gallery along the other side of the building.
  • Both openings of each tunnel, after stowing any drum thereinto are closed by means of a slab slidably fitted in vertical slides at the sides of each vertical row of tunnels.
  • the tunnel floors are slightly sloping whereby the drum are tending to roll towards the tunnel opening facing the gallery. However they are prevented from getting out of the tunnel by a stop mechanism with wich each tunnel opening is provided.
  • the drum last stowed is retained within the tunnel by the rising end sections of a pair of rails with which the tunnel floor is provided and, for better security, a checking device is provided at the mouth of the tunnel.
  • the present invention is substantially aimed to providing a machinery for taking the drums from a conveyor in a shielded room, loading them on a shielded trailer in upright position, transferring the trailer into the storage building, transferring the drums from the trailer to an overturing machine and then on the forks of a lifting and propelling machine, which will be called travelling lift hereinafter, loading them into a tunnel of the storage building and closing the tunnel.
  • Such operations are to be repeated in part when the drums are to be recovered and transferred somewhere else, or to the ultimate storage site.
  • the storage building of the invention is made up of a rectangular reinforced-concrete foundation 2 (fig. 1) on which two identical structures 3 and 5 are based which are symmetrical with respect to a medium corridor or gallery. Only one of the structures will be described for the sake of brevity. It comprises a strong frame including two end walls 7 and 7' and two intermediate walls 11 and 13. All said walls are interconnected at their by a reinforced-concrete slab 15 overlaid on said foundation 2 integral therewith and at their tops by a reinforced-concrete roof 17.
  • Element 19 consists of a reinforced-concrete beam with inverted U shape. The ends of the vertical arms of the U fit into respective indentations of which the underlying element is provided along both of its upper corners. In this way a tunnel 20 is defined by each U-shapped beam and the underlying one; the capacity of the tunnel being of 20 drums. Thirty elements 19 are stacked within the space defined between the two intermediate walls 11, 13 whereby the elements within one half of the storage building are one hundred and two and the total for the whole building is twohundred and four. Thus the total capacity of the building is 4080 drums.
  • the vertical and horizontal partitions by which the tunnel are separated from one another have shielding capacity against beta and gamma radiation.
  • the tunnels open at one end thereof into the main gallery 4 and at the other end into a respetive auxiliary gallery 12,12' which is provided along the outer side of both structures.
  • the main gallery 4 end the auxiliary galleries 12, 12' extend upwards and widen to form two steps 416, 418, 418', 416' at their inner sides at the level of the upper surface of roof 17.
  • the purpose of said steps is for supporting overhead travelling hoists or the like and for providing a walking way for the inspecting personnel.
  • tunnel openings upon loading the drums thereinto or taking them out, are to be closed by means of concrete slabs 14 which are handled by said hoists.
  • the floor of tunnels 20 is provided with rails 311 adapted for engaging two hoops 106 of which each drum is provided and it slopes towards the main gallery 4, the slope of rails 311 being about 1%.
  • the rails have a 1 % slope in the same direction with respect to the floor whereby the total slope of the rails is about 2%.
  • Rails 311 at their ends near the tunnel opening are bent upwards for retaining the drum last fed into the tunnel as better explained hereinafter.
  • a checking device (figs. 12, 13, 14) which will be described hereinafter.
  • the remote-control drum-hooking machine 100 The remote-control drum-hooking machine 100.
  • the drums 8 to be handled by machine 100 are cylindrical drums of conventional shape and capacity (about 50 US gall).
  • Hooking apparatus 100 comprises: a metal sheet cylindrical bell 102 by which the drum to be hooked is partially shrouded in vertical position and in which the hooking mechanism is housed;
  • Each of said elements comprises a bell-crank lever 109 pivotally mounted on a first horizontal bulkhead 108, of which bell 102 is provided at midheight thereof, by means of a spring 107 connected to the end of one arm of lever 109.
  • the end of the other arm has a profile adapted for engaging the inner profile of rim 9.
  • a vertical electromagnet 110 is mounted at the center of bulkhead 108.
  • a plunger core 112 is vertically movable along the central cavity of electromagnet 110, which core extends downwards from a vertically movable assembly 115.
  • the moving assembly 115 extends beyond disk 114 with a shaft 120 slidably fitted through a bushing 122 engaged with the central hub of a plate 126 attached to a second bulkhead 128 of which bell 108 is provided at the upper section thereof.
  • Lever 132 can swing through small angles about its vertical position, the bell body being provided with as many narrow vertical slits 134 as are the levers 132 for letting each lever to pass out of the bell through one of the slits.
  • lever 132 The swinging movement of lever 132 is thus dependent on the vertical movement of assembly 115 whose travel upwards is limited by bushing 122, the position of which is adjustable, while the downwards travel of the same assembly is limited by the position of the top surface of the casing 110' in which the electromagnet 110 is enclosed.
  • the longer arm 132' of lever 132 terminates with an inwardly bent hook 132" adapted for engaging the recessed side of the upper hoop 106 of the drum.
  • the sliding shaft 120 of movable assembly 115 connects, at its upper end, with a fork 136 through a crosspiece 121 which is mounted on an extension of shaft 120 to rotate about the vertical axis of the hooking machine 100.
  • fork 136 apparatus 100 can be suspended from a monorail hoist (non shown).
  • the mechanisms overlying bulkhead 128 are shrouded by a cylindrical guard 137 around which the electromagnet supply cable 138 is wound.
  • Electromagnet 110 is first energized whereby the core 112 is drawn thereinto and link 116 depresses the roller 128 against the force of spring 130. Arm 132' of lever 132 is thus made to swing outward of bell 102, so that the upper rim 9 and the hoop 106 can enter the bell and move past the hooks 132" of levers 132. Bell 102 is then lowered into the drum until the drum rim 9 engages levers 109 and is centered thereby. The electromagnet is then shut off and spring 130 moves hooks 132" inwardly. The hoisting means is then operated for lifting the apparatus and the drum and the force thereby applied to fork 136, hooks 132" engage hoop 106 and the drum can be lifted along with the hooking apparatus.
  • the drum can thus be transferred to another location and there laid down.
  • the bell By loosening the pull on fork 136 and energizing the electromagnet 110, the bell can be disengaged from the drum.
  • the shielded trailer 140 of the present invention comprises a four wheel towable vehicle with steerable front wheels 142 and spring supported rear wheels.
  • a box or coffer 145 is mounted wherein two drums 8,8 can be housed in vertical tandem position.
  • Coffer 145 is divided in two parts 146, 148 along a horizontal plane at mid height, the two halves being made of a shielding materials, for instalce lead clad steel, and being joined to one another along a shoulder or a groove.
  • a doubled motor 304 with reducing gear based on foundation 302, is drivingly engaged with sector gear 310 rotatably mounted on a horizontal shaft 312.
  • a flat rectangular structure 316 is mounted by means of lugs 314, which structure is carried on sector gear 310 and then rotary therewith.
  • Structure 312 on its face opposite to shaft 312 supports a saddle 318 whose profile is adapted for engaging drum 8 at the region thereof between hoops 106.
  • a platform 324 is slidably mounted by means of collars 322 on arms 320 for supporting the drum perpendicular thereto.
  • Platform 324 is provided at its periphery with two retaining bevelled blocks 326 at diametrical positions which serve as guide for centering the drum.
  • Platform 324 at its underside has a rack 328 with which sector gear 330 engages which is rotatably mounted on lugs 332' attached to a plate 332 which extend at right angle from structure 316.
  • Sector gear 330 is rotated by a rod 335 of which one end is connected to the same sector gear by means of pin 331 and the other end is connected to sector gear 310 by means of pin 333.
  • platform 324 is moved according to arrows A of figs. 6 and 7.
  • the purpose of the above mechanism is for moving drum 8 to contact saddle 318 before the same is overturned. In fact, due to hoops the drum cannot be directly lowered with its side contacting saddle 318.
  • a ' travelling lift 40 is made travel along gallery 4 of the building for transferring the drums, one at a time from the overturning machine to the mouth of the tunnel into which a drum is to be stowed and for pushing it into the tunnel along with the drums therein if any until enough room is gained for locating it beyond the raising end sections 311' of rails 311. Travelling lift 40 is also usable for withdrawing the drums from the tunnels.
  • Travelling lift 40 comprises s square section column 42 mounted on a trolley 74 which travels on a track along the centerline of gallery 4 floor.
  • a plate 45 is carried on the upper end of column 42 and is attached to a ring gear 46 which engages a pinion 48 of a motor 50.
  • column 42 can be rotated about its axis through a 180 deg. angle in order to serve the tunnels at either side of the gallery 4.
  • Ring gear 46 has a ring 60' fastened thereto which forms the inner race of a ballbearing of which the outer race 6 is fastened to a strong plate 62 extending across platform 44.
  • Platform 44 at each of its four corners is provided with a bracket 52 having a roller 54 mounted at its underside which travels along a bar 57 supported by a series of brackets 58 fastened to respective structure 3 or 5 of the building.
  • a motor 64 (fig. 11) is provided for driving column 42 along gallery 4 through a reducing gear 66, a shaft 62 and pinions 70 which engage a rack 72 mounted alongside of bar 57.
  • Column 42 at its lower end is supported on trolley 74 through a thrust bearing 76 and a springs 78 (see fig. 9).
  • Trolley 74 travels on a rail by means of wheels 83 and is guided by the side rollers 80 with vertical axes which engage the rail at its sides.
  • a sleeve 70 is slidably mounted on column 42 which is moved vertically along it by a motor 450 mounted on plate 45 through a sprocket wheel 454 and a chain 452, one end of which is attached to sleeve 70 and the other end to a counterweight 456.
  • Sleeve 70 carries six brackets 74 for supporting two parallel horizontal reciprocally facing guide rails 76 made of C shape (fig. 15).
  • a forked slide 78 is mounted between to move along rails 76 and is provided with four rollers 80 inserted between the flanges of said C shapes and with additional four rollers 77 which roll on the sides of said flanges.
  • Slide 78 in plan view has the shape of of tuning fork with two slender beams 78' extending parallel from a crosspiece 78" and supporting wheels 80.
  • a tiltable head 86 is mounted in front of crosspiece 78" by means of pins 85 and lugs 84 depending from crosspiece 78".
  • Head 86 comprises a first plate 89 in close relation to crosspiece 78" and a second farther plate 88 (fig. 14) with shock absorbers 92 interposed between the two plates.
  • rollers 96 are mounted by means of lugs 94 engaging the hoops 106 of drum 8 and applying a thrust on the drums 8 without damaging them.
  • a lever arm 202 (figs. 12, 13) is attached at one end thereof to plate 89 and at its other end to one end of a link 204 which at its other end connects with one arm of a bell-crank lever 206 of which 'the other arm connects with one end of a rod 210 which at its other end connects with the arm of a crank 212 the latter being actuated by a motor 216 through a reducing gear 214. Any rotation of crank 216 is thus transmitted to head 86 through the above linkage.
  • Two lower jaws 218 for grasping drum 8 are attached to plate 89 and an upwardly and then forwardly extending post 220 is attached to each jaw 218.
  • a single jaw 222 is provided on top of drum 8 which is keyed onto the shaft 334 of reducing gear 214 but not attached to crank 212. Jaw 222 and crank 212 can be controlled independently from one another by the same reducing gear 214 through a clutch not shown.
  • the tilting movement of head 86 is requested because the uprising section 311' of rails 311 must be surmounted by drum 8 while loading and unloading it from tunnel 20.
  • posts 220 are for cooperating with a swingable frame 226 of which each tunnel is provided at its opening facing gallery 4 for checking the drum row formerly stowed thereinto.
  • Frame 226 (figs. 12 and 14) comprises a front crossbar 226" perpendicular to the tunnel sides and a second crossbar 226' parallel to the former one and two side slant struts 226'" coplanar with said crossbar.
  • Frame 226 is provided with two arms 230 which extend rearwards towards the tunnel mouth and are pivotally supported on the tunnel sides by means of pins 228.
  • a stop pin 232 at each side of the frame stops the latter at its highest position and another stop pin 232' stops the frame at its lower position suited for propping the drum and preventing the drums already stowed into the tunnel from rolling out.
  • the swinging movement of frame 226 is controlled by arms 220' extending forwardly from posts 220.
EP82830193A 1981-06-30 1982-06-29 Verfahren und Anlage zur Zwischenlagerung von radioaktiven Abfällen Expired EP0072356B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82830193T ATE27745T1 (de) 1981-06-30 1982-06-29 Verfahren und anlage zur zwischenlagerung von radioaktiven abfaellen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4879981 1981-06-30
IT48799/81A IT1142713B (it) 1981-06-30 1981-06-30 Metodo edificio ed apparecchiatura per il confinamento temporaneo di rifiuti radioattivi

Publications (2)

Publication Number Publication Date
EP0072356A1 true EP0072356A1 (de) 1983-02-16
EP0072356B1 EP0072356B1 (de) 1987-06-10

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ID=11268619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830193A Expired EP0072356B1 (de) 1981-06-30 1982-06-29 Verfahren und Anlage zur Zwischenlagerung von radioaktiven Abfällen

Country Status (4)

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EP (1) EP0072356B1 (de)
AT (1) ATE27745T1 (de)
DE (1) DE3276552D1 (de)
IT (1) IT1142713B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5881119A (en) * 1995-06-21 1999-03-09 British Nuclear Fuels Plc Apparatus for handling nuclear fuel rods
EP3174064A1 (de) * 2015-11-30 2017-05-31 AREVA Inc. Horizontales speichermodul, hebeanordnung und kanisterumfüllbaugruppen
ES2673427R1 (es) * 2015-11-30 2018-11-06 Tn Americas Llc Módulo de almacenamiento horizontal, ensamblaje del carro, y conjuntos de transferencia del depósito
US10449685B2 (en) 2010-04-29 2019-10-22 Whirlpool Corporation Food processor with adjustable blade assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2837839A1 (de) * 1978-08-30 1980-04-17 Kraftwerk Union Ag Einrichtung zur wartungsfreien lagerung von radioaktivem material
DE2929467A1 (de) * 1979-07-20 1981-01-22 Kraftwerk Union Ag Trockenlager fuer abgebrannte brennelemente
EP0042323A1 (de) * 1980-06-13 1981-12-23 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Einrichtung zur Lagerung und/oder zum Transport von Kernbrennelementen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2837839A1 (de) * 1978-08-30 1980-04-17 Kraftwerk Union Ag Einrichtung zur wartungsfreien lagerung von radioaktivem material
DE2929467A1 (de) * 1979-07-20 1981-01-22 Kraftwerk Union Ag Trockenlager fuer abgebrannte brennelemente
EP0042323A1 (de) * 1980-06-13 1981-12-23 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Einrichtung zur Lagerung und/oder zum Transport von Kernbrennelementen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5881119A (en) * 1995-06-21 1999-03-09 British Nuclear Fuels Plc Apparatus for handling nuclear fuel rods
US10449685B2 (en) 2010-04-29 2019-10-22 Whirlpool Corporation Food processor with adjustable blade assembly
EP3174064A1 (de) * 2015-11-30 2017-05-31 AREVA Inc. Horizontales speichermodul, hebeanordnung und kanisterumfüllbaugruppen
ES2673427R1 (es) * 2015-11-30 2018-11-06 Tn Americas Llc Módulo de almacenamiento horizontal, ensamblaje del carro, y conjuntos de transferencia del depósito
US10513393B2 (en) 2015-11-30 2019-12-24 Tn Americas Llc Horizontal storage module, carriage assembly, and canister transfer assemblies

Also Published As

Publication number Publication date
IT8148799A0 (it) 1981-06-30
IT1142713B (it) 1986-10-15
EP0072356B1 (de) 1987-06-10
ATE27745T1 (de) 1987-06-15
DE3276552D1 (en) 1987-07-16

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