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NRC RIN: 3150-AI75 Publication ID: Fall 2010 
Title: List of Approved Spent Fuel Storage Casks: NUHOMS HD System, Revision 1 [NRC-2009-0538] 
Abstract: The direct final rule amends the Commission's regulations that apply to storage of spent fuel by revising the Transnuclear, Inc. (TN) NUHOMS HD System dry cask storage system listing within the List of Approved Spent Fuel Storage Casks to include Amendment No. 1 to Certificate of Compliance (CoC) Number 1030. Amendment No. 1 will modify the CoC to add Combustion Engineering 16x16 class fuel assemblies as authorized contents, reduce the minimum ambient temperature from -20 ºF to -21 ºF, expand the authorized contents of the NUHOMS HD System to include pressurized water reactor fuel assemblies with control components, reduce the minimum initial enrichment of fuel assemblies from 1.5 weight percent uranium-235 to 0.2 weight percent uranium-235, clarify the requirements of reconstituted fuel assemblies, add requirements to qualify metal matrix composite neutron absorbers with integral aluminum cladding, delete use of nitrogen for draining the water from the dry shielded canister (DSC), and allow only helium as a cover gas during DSC cavity water removal operations. 
Agency: Nuclear Regulatory Commission(NRC)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
CFR Citation: 10 CFR 72   
Legal Authority: 42 USC 2201    42 USC 5841   
Legal Deadline:  None
Timetable:
Action Date FR Cite
Direct Final Rule  05/06/2010  75 FR 24786   
Direct Final Rule Effective  07/20/2010    
NPRM  05/07/2010  75 FR 25120   
NPRM Comment Period End  06/07/2010    
Direct Final Rule Withdrawal  07/16/2010  75 FR 41369   
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Jayne M. McCausland
Nuclear Regulatory Commission
Office of Federal and State Materials and Environmental Management Programs,
Washington, DC 20555-0001
Phone:301 415-6219
Email: jayne.mccausland@nrc.gov