Decay heat calculation for spent fuel pool application

The automatic procedure was developed for fuel assembly decay heat calculation based on PARCS 3D burnup cycle depletion, and ORIGEN 2.1 during both depletion cooling. Using appropriate pre-processor post-processor codes it is possible to calculate loads all assemblies discharged from reactor. Simple graphical application then used distribute within pool any assembly, SFP rack, or whole load at arbitrary time. can be overview of burnups, cooling times heats. Based given date time boiling uncover using simple mass energy balances. Calculated input more detailed thermal-hydraulics calculations spent pool. demonstration performed NPP Krsko