A dry shielded canister (DSC) is a hermetically sealed circular cylinder, containing spent nuclear..

A dry shielded canister (DSC) is a hermetically sealed
circular cylinder, containing spent nuclear fuel assemblies for long time
storage. Consider a design in which the DSC is filled with helium and placed
horizontally for passive cooling in the ambient.

If there are 26 fuel assemblies in a DSC and each fuel
assembly produces a design decay power of 0.5 kW, estimate the amount of helium
mass the DSC should be filled with so that at the thermodynamic equilibrium,
the helium pressure does not exceed 5 psig. Assume Tf = 105 F, Do = 68 in, Di =
65 in, L = 10 ft, ho = 10 Btu/h·ft2 ·F.
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A dry shielded canister (DSC) is a hermetically sealed
circular cylinder, containing spent nuclear fuel assemblies for long time
storage. Consider a design in which the DSC is filled with helium and placed
horizontally for passive cooling in the ambient.

If there are 26 fuel assemblies in a DSC and each fuel
assembly produces a design decay power of 0.5 kW, estimate the amount of helium
mass the DSC should be filled with so that at the thermodynamic equilibrium,
the helium pressure does not exceed 5 psig. Assume Tf = 105 F, Do = 68 in, Di =
65 in, L = 10 ft, ho = 10 Btu/h·ft2 ·F. The DSC shell is made of
stainless steel. The end plates have the same thickness as the shell and are
made of the same material. An internal heat transfer coefficient of hi = 20
Btu/h·ft2 ·F is found to represent the combined ther- mal radiation,
heat conduction, and heat convection inside the canister. Ignore thermal
radiation from the canister to the ambient.

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