UPGRADING SPENT FUEL SHIPPING CASKS TO MEET HIGHER BURN UP

Two of the main basic characteristics transportation of spent fuel assemblies have undergone a significant evolution - initial enrichment of uranium, - burn-up of the spent fuel. affecting recently Another data of the regulatory environment is also being modified : the value of the neutron quality factor used for determination of neutron dose rate. Furthermore, transportation of irradiated mixed-oxide fuel (MOX) will become more and more frequent in Europe. All these changes may force transport cask owners to purchase new casks. In order to avoid this expensive solution, the owners of TN casks are now offering a variety of solutions to fulfill the new requirements without having to invest in new equipment. The purpose of this paper is to present these alternatives and our experience in this field.