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 amending its 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 require a minimum of two outlet air temperature measurements to provide an average outlet temperature.