List of Approved Spent Fuel Storage Casks: NAC International NAC-UMS® Universal Storage System, Certificate of Compliance No. 1015, Amendment No. 7

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The U.S. Nuclear Regulatory Commission (NRC) is confirming the effective date of July 29, 2019, for the direct final rule that was published in the Federal Register on May 15, 2019. This direct final rule amended the NRC's spent fuel storage regulations by revising the NAC International NAC-UMS[supreg] Universal Storage System listing within the "List of approved spent fuel storage casks," to include Amendment No. 7 to Certificate of Compliance No. 1015. Amendment No. 7 revises the surveillance requirements for technical specifications A3.1.6.1 and A3.1.6.2 to ensure that adequate monitoring of the concrete cask heat removal system is performed. Amendment No. 7 also revises the basis for technical specification A3.1.6 to clarify that the surveillance requirements for technical specification A3.1.6 requires a minimum of two outlet air temperature measurements to provide an average outlet temperature.