List of Approved Spent Fuel Storage Casks: NUHOMS® HD Revision 1; Withdrawal
The U.S. Nuclear Regulatory Commission (NRC) is withdrawing a direct final rule that would have revised the NUHOMS[supreg] HD cask system listing within the list of approved spent fuel storage casks to include Amendment No. 1 to Certificate of Compliance (CoC) Number 1030. The NRC is taking this action because the applicant identified that a certain Technical Specification (TS) for Boral characterization was not written precisely and in a manner that could be readily and demonstrably implemented. Specifically, the requirements for meeting TS 4.3.1, "Neutron Absorber Tests," which references Section 9.1.7.3 of the Safety Analysis Report (SAR), are not precisely quantified in that it requires that "the average size of the boron carbide particles in the finished product is approximately 50 microns after rolling." Use of language such as "average" and "approximately" is imprecise, and no ranges or statistical variations are specified. The NRC will publish a revised direct final rule along with its companion proposed rule after the necessary revisions to the TS are made.