Solid Radioactive Waste Strategy Report.pdf - UK EPR

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EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 116 / 257 TABLE 34: IMPACT OF TIME ON ILW At production time After interim storage (+) ILW Waste Waste quantity Type of package Nb Packed volume (m 3 ) Waste quantity Type of package Nb Packed volume (m 3 ) IER from decontamination 30/40 m 3 500l drum 370 220 0 - - 0 Activated components 225 te 221 te 4 metre box - 400mm 3 cubic metre box – 100 mm 28 600 180 te 167 450 210 te 4 metre box - 100mm 3 cubic metre box 10 220 75 200 Activated concrete 180 te 4 metre box 6 130 0 - - 0 TOTAL 626 te 3 - 571 1400 390 te - 85 420 30/40 m (*) comprising the HLW after some years of decay (+) same kind of evolution in case of deferred dismantling
EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 117 / 257 TABLE 35: 4 METRE BOX WITH 400 MM CONCRETE SHIELDING CHARACTERISTICS FOR METALLIC WASTE Nature of waste stream: Raw waste volume: About 29 m 3 Reactor vessel: Parts from the reactor vessel (cladding included) near the core Proposed matrix: Package type: Raw waste per package: Mortar matrix NDA specification 4 metre Box with 400 mm concrete shielding 7.4 to 10.6 per package (limited by filling ratio). Waste form density: 3140 to 3500 kg\m 3 (r stainless steel =7850 kg/m 3 & r grout =2300 kg/m 3 ) Waste package mass: 54 to 56 tonnes m package = m 4 meter Box + m immobilised grout + m steel waste + m concrete shielding Number of packages: About 28 Physical/chemical composition: The waste in an average package by weight is expected to comprise: – 38% of ferritic steel waste, – 2% of stainless steel waste, – 60% of mortar. Derivation of case: DARWIN PEPIN calculation with representatives flux in the reactor vessel Reference date: At shut down (years 65) Total package activity: Waste classification: (based on mass of wasteform) External gamma dose rates: 4 metre Box with 400mm internal concrete shielding: 10.7 TBq βγ >12 000 Bq/g - ILW 4 metre Box with 400mm internal concrete shielding: 1.33 E6 Bq/g βγ At 1m: < 0.1 mSv/h At contact: < 2 mSv/h From the package.
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A 2008-11-26 Sarah Greenwood Gary C
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