Partial core offload

A partial core offload info the SFP which becomes filled to capacity with the partial core offload. This scenario covers a sfandard refueling outage where only the assemblies to be discharged are transferred to fhe SFP. 

An abnormal full core offload (full core plus a partial core offload) into the SFP into the spent fuel which becomes filled to capacify with the abnormal full core offload. This scenario covers a shutdown of fhe reactor and transfer of the entire core soon after a previous refueling outage. 

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See also in sourсe #XX -- [ ]

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