An Estimate of the Contribution of \"Crud\" to the Radioactivity Source Term of a Spent Fuel Transport Cask*

There are three sources of releasable radioactive material in a loaded, spent fuel transport cask: (1) the residual contamination activity on the cask surfaces as a result of loading operations and previous shipments, (2) fission and activationproduct activity associated with deposited material on the fuel assembly surfaces (\"crud\"), and (3) the radionuclides contained within the individual fuel rods comprising the fuel assemblies.