ACCUMULATION OF FLAMMABLE GAS IN SEALED WASTE TRANSFER ASSOCIATED STRUCTURES

TL;DRAbstract

This report assesses potential accumulation of flammable gases in sealed waste transfer structures. A hypothetical scenario was analyzed in which flammable gas was generated by spilled waste on the transfer structure floor. Results showed that the flammable gas concentration builds slowly and it would take decades to reach the lower flammability limit (LFL) in these hypothetical scenarios. Qualitative and quantitative analyses are used to provide a conservative assessment of the flammable gas hazard. This assessment includes steel transfer structures, transfer structures with external coatings (e.g., coatings applied during interim isolation), and internal coatings (e.g., polyurea that is being applied to active transfer structures as part of Project W-314).

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