Solid Radioactive Waste Strategy Report.pdf - UK EPR

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EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 220 / 257 The flask is designed so as to minimise surface contamination and to facilitate the decontamination of what remains after loading: · Outer surfaces are treated with a paint that can be decontaminated; · The design of the flasks eliminates as far as possible retention zones where contamination might become trapped. Where a potential retention could not be eliminated through design, tools and/or methods to protect the zone are indicated in the operating instructions; · The TN DUO also allows the trouble-free retrieval of spent fuel after the interim storage period by simply opening the 2 bolted lids. Shock absorbing covers and anti-aircraft crash cover The shock absorbing covers provide the protection required for transport licensing. The anti-aircraft crash cover provides the protection against an aircraft crash on the storage facility. It is made of carbon steel with paint protection against corrosion. 13.3.1.3 TN DUO Characteristics All data presented below are only for information use and could be modified after exhaustive studies taking into account the specific data like the environmental conditions, the interface data, shielding criteria, thermal criteria.
EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 221 / 257 Dimensions and Weights (subject to change according to specific requirements) TABLE 43: DIMENSIONS OF TN DUO FLASK Flask diameter in transport configuration < 3200 mm Flask diameter in storage configuration < 2500 mm Flask height (without shock absorbing covers) Flask height (with shock absorbing covers) Flask height (in storage configuration) < 5600 mm < 7500 mm < 6000 mm TABLE 44:WEIGHTS OF TN DUO FLASK Flask loaded with the primary lid Loaded flask in transport configuration Loaded flask in storage configuration < 120 te < 128 te < 130 te Flask performance (subject to change according to specific requirements) The main characteristics of the flask are presented below; it should be noted that flask performance could be improved by additional aluminium heat exchangers on the outer surface, to account for higher heat dissipation requirements. TABLE 45: FLASK PERFORMANCE REQUIREMENTS Flask capacity Up to 21 assemblies Type of assembly EPR 17x17 Average burn up 65 000 MWd/tU Maximum 235U enrichment 5 % (in weight) Cooling time 10 years
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A 2008-11-26 Sarah Greenwood Gary C
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Solid Radioactive Waste Strategy Report.pdf - UK EPR

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