Tome Architecture and management of a geological repository - Andra
Tome Architecture and management of a geological repository - Andra
Tome Architecture and management of a geological repository - Andra
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5 – B waste <strong>repository</strong> zoneTable 5.1.3Summary <strong>of</strong> principle characteristics <strong>of</strong> sub-assemblies <strong>of</strong> compacted claddingwaste packagesPackage subassemblyCladding wastematerials1 Zirconium-tin orzirconium-niobiumalloys, stainlesssteels, nickel alloy2 Ditto sub-assembly13 Zirconium-tin alloy,stainless steels,nickel alloy4 MagnesiumzirconiumormagnesiummanganesealloysPresence <strong>of</strong>technologicalwastePresence <strong>of</strong>organicmatterProduction <strong>of</strong>gas byradiolysis(H 2 )Thermicity,irradiation levelwhen packagesproducedx x x Packages transferlittle heat, extremelyirradiatingx None None Packages transferlittle heat, extremelyirradiatingNone None None Packages do nottransfer heat,moderatelyirradiatingNone None None Packages do nottransfer heat, onlyslightly irradiating5.1.5 Cladding <strong>and</strong> technological waste placed in drumsThis groups waste (reference package B6) produced on the COGEMA Marcoule site <strong>and</strong> currentlystored, excluding bitumen waste <strong>and</strong> cemented pulverulent waste described above. It includes (i)operating waste from the Marcoule vitrification shop, (ii) cladding waste from fuels reprocessed in theUP1 plant <strong>and</strong> (iii) operating <strong>and</strong> maintenance technological waste from the Marcoule site facilities.The waste is placed in stainless steel drums. Note that the modalities for limiting the residual voidsinside the primary packages have yet to be defined.A first package sub-assembly contains technological waste from operations in the Marcoulevitrification shop (AVM). The waste formed <strong>of</strong> equipment, tools <strong>and</strong> various steel parts is deposited ina stainless steel container <strong>of</strong> similar geometry to the AVM vitrified waste containers. The packagesweigh 160 kilograms on average <strong>and</strong> may weigh as much as 320 kilograms (excluding wasteimmobilisation material). Radiological activity corresponds to contamination <strong>of</strong> the waste surfacearea. These packages do not transfer heat <strong>and</strong> have an irradiation level <strong>of</strong> around 0.05 Sv/h.A second package sub-assembly contains fuel cladding waste. The waste is temporarily conditioned instainless steel drums known as EIP drums (from the French acronym for multi-purpose storagefacility). The packages hold aluminium <strong>and</strong> stainless steel cladding waste or magnesium-alloycladding waste. They weigh less than 300 kilograms on average (excluding waste immobilisationmaterial). Packages containing aluminium <strong>and</strong> steel cladding waste have a heat rating in the order <strong>of</strong>10 watts, mainly attributable to cobalt-60; this will be 0.5 watts at most by 2025. The packageirradiation level is 25 Sv/h, becoming 2 Sv/h by 2025.The packages containing the magnesium alloy cladding waste do not transfer heat. Their irradiationlevel, attributable to two isotopes, barium-137m ( 137m Ba) <strong>and</strong> europium-154 ( 154 Eu), is 3 Sv/h,becoming around 2 Sv/h by 2025.A third package sub-assembly contains technological waste made up <strong>of</strong> a mixture <strong>of</strong> metallic materials<strong>and</strong> organic matter or metallic materials alone. The temporary conditioning method is also to place thewaste in EIP drums.Dossier 2005 Granite - ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL REPOSITORY109/228
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