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List of Approved Fuel Storage Casks: NAC-UMS Revision 4, Confirmation of Effective Date

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Nuclear Regulatory Commission.


Direct final rule: Confirmation of effective date.


The Nuclear Regulatory Commission (NRC) is confirming the effective date of October 11, 2005, for the direct final rule that was published in the Federal Register on July 25, 2005 (70 FR 42485). This direct final rule amended the NRC's regulations to revise the NAC-UMS cask system listing to include Amendment No. 4 to Certificate of Compliance (CoC) No. 1015.


The effective date of October 11, 2005, is confirmed for this direct final rule.


Documents related to this rulemaking, including comments received, may be examined at the NRC Public Document Room, located at One White Flint North, 11555 Rockville Pike, Rockville, MD 20852. These same documents may also be viewed and downloaded electronically via the rulemaking Web site ( For information about the interactive rulemaking website, contact Ms. Carol Gallagher (301) 415-5905; e-mail

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Jayne M. McCausland, Office of Nuclear Material Safety and Safeguards, U.S. Nuclear Regulatory Commission, Washington, DC 20555, telephone (301) 415-6219, e-mail

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On July 25, 2005 (70 FR 42485), the NRC published a direct final rule amending its regulations in 10 CFR part 72 to revise the NAC-UMS cask system listing within the “List of Approved Spent Fuel Storage Casks” to include Amendment No. 4 to CoC No. 1015. This amendment replaces the term “zircaloy” with the more generic term “zirconium alloy'; revises the definitions of “operable” and “site specific fuel”; revises vacuum drying pressure and time limits; revises short-term temperature limits and completion times for the heat removal system; clarifies the surface dose rate surveillance; adds a dissolved boron concentration option; deletes a redundant boron concentration administrative control; adds an alternate site-specific design basis earthquake analysis; and incorporates editorial and administrative changes. In the direct final rule, NRC stated that if no significant adverse comments were received, the direct final rule would become final on October 11, 2005. The NRC did not receive any comments that warranted withdrawal of the direct final rule. Therefore, this rule will become effective as scheduled.

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Dated at Rockville, Maryland, this 18th day of September, 2005.

For the Nuclear Regulatory Commission.

Michael T. Lesar,

Chief, Rules and Directives Branch, Division of Administrative Services, Office of Administration.

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[FR Doc. 05-18914 Filed 9-21-05; 8:45 am]