[Federal Register Volume 75, Number 184 (Thursday, September 23, 2010)]
[Rules and Regulations]
[Page 57841]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-23875]

Rules and Regulations
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Federal Register / Vol. 75, No. 184 / Thursday, September 23, 2010 / 
Rules and Regulations

[[Page 57841]]


10 CFR Part 72

RIN 3150-AI88

List of Approved Spent Fuel Storage Casks: NAC-MPC System, 
Revision 6, Confirmation of Effective Date

AGENCY: Nuclear Regulatory Commission.

ACTION: Direct final rule: Confirmation of effective date.


SUMMARY: The Nuclear Regulatory Commission (NRC) is confirming the 
effective date of October 4, 2010, for the direct final rule that was 
published in the Federal Register on July 21, 2010 (75 FR 42292). This 
direct final rule amended the NRC's spent fuel storage regulations at 
10 CFR 72.214 to revise the NAC-MPC System listing to include Amendment 
Number 6 to Certificate of Compliance (CoC) Number 1025.

DATES: Effective Date: The effective date of October 4, 2010, is 
confirmed for this direct final rule.

ADDRESSES: Documents related to this rulemaking, including any comments 
received, may be examined at the NRC Public Document Room, Room O-1F23, 
11555 Rockville Pike, Rockville, MD 20852.

FOR FURTHER INFORMATION CONTACT: Jayne M. McCausland, Office of Federal 
and State Materials and Environmental Management Programs, U.S. Nuclear 
Regulatory Commission, Washington, DC 20555, telephone (301) 415-6219, 
e-mail [email protected].

SUPPLEMENTARY INFORMATION: On July 21, 2010 (75 FR 42292), the NRC 
published a direct final rule amending its regulations at 10 CFR 72.214 
to include Amendment No. 6 to CoC No. 1025. Amendment No. 6 changes the 
configuration of the NAC-MPC storage system by the incorporation of a 
single closure lid with a welded closure ring for redundant closure 
into the Transportable Storage Canister (TSC) design; modification of 
the TSC and basket design to accommodate up to 68 La Crosse Boiling 
Water Reactor spent fuel assemblies (36 undamaged Exxon fuel assemblies 
and up to 32 damaged fuel cans (in a preferential loading pattern)) 
that may contain undamaged Exxon fuel assemblies and damaged Exxon and 
Allis Chalmers fuel assemblies and/or fuel debris; the addition of 
zirconium alloy shroud compaction debris to be stored with undamaged 
and damaged fuel assemblies; minor design modifications to the Vertical 
Concrete Cask incorporating design features from the MAGNASTOR System 
for improved operability of the system while adhering to as low as is 
reasonably achievable principles; an increase in the concrete pad 
compression strength from 4,000 psi to 6,000 psi; added justification 
for the 6-ft. soil depth as being conservative; and other changes to 
incorporate minor editorial corrections in CoC No. 1025 and Appendices 
A and B of the Technical Specifications (TS). Also, the Definitions in 
TS 1.1 are revised to include modifications and newly defined terms; 
the Limiting Conditions for Operation and associated Surveillance 
Requirements in TS 3.1 and 3.2 are revised; and editorial changes are 
made to TS 5.2 and 5.4. In the direct final rule, NRC stated that if no 
significant adverse comments were received, the direct final rule would 
become final on October 4, 2010. The NRC did not receive any comments 
on the direct final rule. Therefore, this rule will become effective as 

    Dated at Rockville, Maryland, this 17th day of September 2010.

    For the Nuclear Regulatory Commission.
Cindy Bladey,
Chief, Rules, Announcements, and Directives Branch, Division of 
Administrative Services, Office of Administration.
[FR Doc. 2010-23875 Filed 9-22-10; 8:45 am]