The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the Holtec International HI- STORM 100 Cask System listing within the "List of approved spent fuel storage casks" to add Revision 1 to Amendment No. 8 (effective May 2, 2012, as corrected on November 16, 2012), to the Certificate of Compliance (CoC) No. 1014. Amendment No. 8, Revision 1, changes burnup/ cooling time limits for thimble plug devices, changes Metamic-HT material testing requirements, changes Metamic-HT material minimum guaranteed values, and updates fuel definitions to allow boiling water reactor fuel affected by certain corrosion mechanisms with specific guidelines to be classified as undamaged fuel.