Architecture and management of a geological repository - Andra

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9 – Nuclear operating resources in the repository9.3.2.5 A similar solution studied in GermanyThe photo in Figure 9.3.8 illustrates thesolution adopted in Germany in the future"Konrad" installations for the disposal of typeB low-level wastes [81]. The machine is afork-lift truck with a counterweight with acapacity of about 20 tonnes, that is articulatedfor taking tight corners. It has a shielded cabinto provide radiological protection for the onboardoperator.Figure 9.3.8DBE)A fork-lift with counterweight (photo9.3.3 Description of the equipmentand process of installing packages of C wastes9.3.3.1 Design principles• Required functionsThe disposal packages of C wastes weigh about 2 tonnes. Type C1 to C4 packages are about 0.60 m indiameter and about 1.60 m long. Type C0 packages are 0.65 m in diameter and about 1.30 m long.The placing of cylindrical radioactive packages in a horizontal cell of circular section requires aremote-controlled machine capable of being contained in the shielded transfer cask and of transferringthe packages to their final position with a functional clearance between the packages and the cell assmall as possible.DOSSIER 2005 ARGILE -ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL DISPOSAL SYSTEM352/495
9 – Nuclear operating resources in the repository• Choice of the principle for handling the packagesThree principles, illustrated by Figure 9.3.9, have beenidentified for the transfer of the disposal package:- a air transport robot using the air cushion principle,- a self-propelled transporter robot,- a self-propelled pusher robot.The "air cushion" principle on a circular support has beenthe subject of two conclusive feasibility tests. One wasconducted by Andra (case of type CU1 spent fuels) and theother by the Swedish agency SKB (case of a supercontainer).However, these tests were conducted on a loadwith a much greater diameter (1.80 m and 1.25 m) than thatof type C disposal packages (0.60 m) so that they cannot beconsidered to be readily transposable. The diameter of Cpackages is in fact too small to be able to use standard aircushion cells. The thickness of the structure bearing the aircushions (about 5 cm) imposes a relatively large functionalclearance compared to the diameter of the cell (0.60 m).The principle of the transporter robot consists of lifting thedisposal package in a position jutting out in front, by a selfpropelledrobot. This robot has a counterweight to balancethe weight of the package. The combined package and robottherefore constitutes a rigid block whose length requires alarge clearance between the packages and the sleeve.Figure 9.3.9 Illustration of theenvisaged handling principlesThe principle of lifting in an offset position requires compensation by the weight of the robot, leadingto a rather long machine. This factor therefore leads to an increase in the size and weight of theprotective transfer cask.The principle of the pusher robot with step-by-step jacks consists of pushing the package by simplesliding on the cell sleeve. The push is exerted by an axial hydraulic jack. The robot buttresses itselfusing radial jacks that push on the sleeve. The robot advances by retracting the push jack.At this stage of the studies, the push option by a jack was preferred to the other options. This principleof pushing by sliding, benefits from the experience gained in two trials conducted, one by ONDRAFand the other by Andra. These tests showed that the key factor is the nature of the contact between thepackages and the sleeve. In particular, contacts of the "metal on metal" type are not allowed. The useof stainless steel is a factor that would be liable to seize the system as shown by the test conducted byONDRAF.Taking into account this difficulty has led us to envisage using ceramic sliding runners included on thepackages.9.3.3.2 Description of the equipment used for installing C waste disposal packagesThe equipment studied, complying with the principle described above, consists of three parts: a mobilerobot, fixed equipment mounted on the chassis of the protective transfer cask and fixed equipmentinstalled at head of the cell.The robot is connected to the fixed equipment of the transfer cask by means of an umbilical cable. Thefixed equipment at the head of the cell contributes with the transfer cask to the radiological protectionof personnel.DOSSIER 2005 ARGILE -ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL DISPOSAL SYSTEM353/495
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Report SeriesTomeArchitectureand ma
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C.RP.ADP.04.00013/495ContentsConten
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C.RP.ADP.04.00015/4955.3.2 Design p
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C.RP.ADP.04.00017/4959.2.3 The tran
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C.RP.ADP.04.00019/495Bibliographic
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C.RP.ADP.04.000111/495Table of illu
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C.RP.ADP.04.000113/495Figure 4.3.8
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C.RP.ADP.04.000115/495Figure 5.3.9F
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C.RP.ADP.04.000117/495Figure 9.2.2
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C.RP.ADP.04.000119/495Figure 10.4.8
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C.RP.ADP.04.000121/495Table 11.6.1T
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1 - The Study Approach1.1 Purpose o
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1 - The Study ApproachFrom 1999 to
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1 - The Study Approach1.4 Structure
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2 - General DescriptionThis chapter
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2 - General DescriptionHLLL waste p
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2 - General DescriptionFor a transi
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2 - General DescriptionIt should al
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2 - General Description2.2.2.2 Safe
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2 - General DescriptionThe protecti
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2 - General DescriptionIt should al
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2 - General DescriptionThis section
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2 - General Descriptionfollowing th
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2 - General Description2.3.2.2 Geoc
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2 - General DescriptionFigure 2.3.5
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2 - General DescriptionIn the Dogge
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2 - General Description• A dimens
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2 - General Description2.4.1.2 Desi
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2 - General Description- some conne
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2 - General DescriptionAs for the w
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2 - General DescriptionThe figure b
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33High-level long-lived waste3.1 Wa
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3 - High Level Long-Lived WasteRese
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3 - High Level Long-Lived Wastesupp
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3 - High Level Long-Lived WasteThe
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3 - High Level Long-Lived WasteFigu
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3 - High Level Long-Lived WasteA fi
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3 - High Level Long-Lived WasteA se
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3 - High Level Long-Lived WasteVitr
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3 - High Level Long-Lived WasteCond
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3 - High Level Long-Lived WasteDist
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3 - High Level Long-Lived Waste3.3.
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3 - High Level Long-Lived WasteTabl
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44Waste disposal packages4.1 B disp
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4 - Waste disposal PackagesFor empl
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4 - Waste disposal Packages• Safe
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4 - Waste disposal Packages• "Par
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4 - Waste disposal PackagesThe prin
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4 - Waste disposal PackagesThe seco
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4 - Waste disposal PackagesFigure 4
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4 - Waste disposal Packages4.1.5 Th
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4 - Waste disposal Packages4.1.5.7
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4 - Waste disposal PackagesIn the c
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4 - Waste disposal PackagesFinally,
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4 - Waste disposal PackagesThe YAG
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4 - Waste disposal PackagesIn the U
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4 - Waste disposal PackagesThe spee
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4 - Waste disposal Packages4.2.4 Ma
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4 - Waste disposal PackagesLoadSlid
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4 - Waste disposal Packages4.3 Spen
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4 - Waste disposal PackagesThe seco
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4 - Waste disposal PackagesFor both
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4 - Waste disposal Packages• Safe
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4 - Waste disposal PackagesAs for C
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4 - Waste disposal PackagesMelted c
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55Repository modules.5.1 B waste re
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5 - Repository Modules5.1.1.1 Quest
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5 - Repository Modules• Controlli
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5 - Repository ModulesFigure 5.1.1t
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5 - Repository Modules• The geome
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5 - Repository ModulesTable 5.1.1Fu
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5 - Repository ModulesFigure 5.1.9D
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5 - Repository Modules5.1.3.2 Detai
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5 - Repository Modules• Arrangeme
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5 - Repository ModulesAlthough this
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5 - Repository ModulesConnection be
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5 - Repository ModulesFurthermore,
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5 - Repository ModulesTo illustrate
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5 - Repository Modules• The acces
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5 - Repository ModulesFigure 5.1.24
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5 - Repository Modules• Limiting
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5 - Repository Modules5.2.2 Design
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5 - Repository ModulesA concept wit
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5 - Repository Modules• Orientati
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5 - Repository ModulesFigure 5.2.3O
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5 - Repository Modules5.2.3.1 Descr
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5 - Repository ModulesA minimum ann
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5 - Repository ModulesIn terms of t
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5 - Repository ModulesStorage perio
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5 - Repository ModulesSensitivity t
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5 - Repository ModulesIt must be no
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5 - Repository Modules• Disposal
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5 - Repository Modules• Assembly
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5 - Repository ModulesThe permeabil
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5 - Repository ModulesThe evolution
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5 - Repository ModulesThe lowest dr
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5 - Repository Modules• Back-fill
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5 - Repository Modules5.3.2.1 Sever
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5 - Repository ModulesFigure 5.3.4S
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5 - Repository ModulesThe cells are
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5 - Repository ModulesFinally, it s
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5 - Repository ModulesThe internal
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5 - Repository Modules• Descripti
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5 - Repository Modules- another pos
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66 Overall undergroundarchitecture6
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6 - Overall underground architectur
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7 - The shafts and the driftsThe co
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7 - The shafts and the drifts7.2.2
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7 - The shafts and the driftsFigure
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7 - The shafts and the drifts7.3.3.
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7 - The shafts and the drifts7.3.4.
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7 - The shafts and the drifts7.4 De
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Page 321 and 322: 88Surface installations8.1 General
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Page 369 and 370: Figure 10.1.1Key repository operati
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Page 385 and 386: 10.3.1.1 Overview of the principal
Page 387 and 388: 10.3.2.2 Monitoring of type C waste
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Page 391 and 392: • Absence of a significant impact
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Page 401 and 402: Figure 10.3.9Example of monitoring
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In addition, a visual control syste
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Cell atmosphere monitoring is limit
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The monitoring of the seal can be c
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• The instrumented sections and t
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The deformation measurements carrie
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10.3.9 Observation of spent fuel di
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These instrumented sections (cf. §
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The monitoring equipment embedded i
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the cell which conditions the evolu
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Figure 10.4.2Cell filled with B pac
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Ventilation of a 250-m long cell re
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• Package retrieval processOnce t
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Figure 10.4.10C Cell at end of oper
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The robot is traversed similarly to
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This operation is complete when a b
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The condition of the drift liner sh
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1111 Operational Safety11.1 Evaluat
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11 - Operational SafetyTransport tr
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11 - Operational SafetyTable 11.1.1
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11 - Operational SafetyResultsTable
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11 - Operational SafetyThe risks ar
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11 - Operational SafetyOn the surfa
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11 - Operational Safety“Honeycomb
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11 - Operational SafetyGiven the me
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11 - Operational SafetyThis risk co
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11 - Operational SafetyHydrogen emi
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11 - Operational SafetyOver and abo
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11 - Operational SafetyFigure 11.4.
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11 - Operational SafetyHowever, wit
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11 - Operational Safety11.5.2 Concl
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11 - Operational Safety11.7.1 Asses
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11 - Operational SafetySuch a damag
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11 - Operational Safety11.8.1.2 Dat
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11 - Operational SafetyIn all cases
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1212 Synthesis12.1 Simple and robus
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12 - SynthesisThe existence of unce
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12 - SynthesisTo concretely illustr
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Bibliographic references[17] Callon
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Bibliographic references[54] Andra
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Bibliographic references[88] IAEA (
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Photo Credits:ANDRA - AREVA CREATIV
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