ML12143A028

Requests for Additional Information for the Review of the Limerick Generating Station, Units 1 and 2, License Renewal Application TAC ME6555 and ME6556)

ML12143A028
Person / Time
Site:	Limerick
Issue date:	06/05/2012
From:	Robert Kuntz License Renewal Projects Branch 1
To:	Gallagher M Exelon Generation Co
Kuntz R 301-415-3733
References
TAC ME6555, TAC ME6556
Download: ML12143A028 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 05, 2012 Mr. Michael P. Gallagher Vice President, License Renewal Projects Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348

SUBJECT:

REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LIMERICK GENERATING STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME6555 AND ME6556)

Dear Mr. Gallagher:

By letter dated June 22,2011, Exelon Generation Company, LLC submitted an application pursuant to Title 10 of the Code ofFederal Regulations, Part 54, to renew the operating licenses for Limerick Generating Station, Units 1 and 2, for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The staff is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review.

These requests for additional information (RAls) were discussed with Christopher Wilson, and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me by telephone at 301-415-3733 or bye-mail at Robert. Kuntz@nrc.gov.

Robert F. Kuntz, Senior Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353

Enclosure:

Requests for Additional Information cc w/encl: Listserv

LIMERICK GENERATING STATION LICENSE RENEWAL APPLICATION REQUESTS FOR ADDITIONAL INFORMATION RAI 8.2.1.32-2.1

Background

The Limerick Generating Station (LGS) license renewal application (LRA) section 8.2.1.32 states that the ASME Section XI, Subsection IWF program, with enhancement, will be consistent with GALL Report AMP XI.S3. The response to RAI B.2.1.32-2, provided by letter dated February 28, 2012, stated that there are no ASTM A325, F1852, or A490 bolts within the scope of the ASME Section XI, Subsection IWF program. Therefore, the response stated that the GALL Report recommended preventive actions in Section 2 of Research Council for Structural Connections (RCSC) publication "Specification for Structural Joints Using ASTM A325 or A490 Bolts" do not apply.

The response to RAI 3.5.2.1.1-1, provided by letter dated February 16, 2012, regarded stress corrosion cracking (SCC) in high strength bolts. The response stated that A325 or A490 bolts are used for high strength structural bolts and that structural bolting is within the scope of license renewal and is managed by the Structures Monitoring Program. The response further stated that SCC potential need not be evaluated for these bolts based on guidance in SRP-LR Table 3.5-1, 1069.

The staff agrees that SCC potential need not be evaluated for ASTM A325 and A490 structural bolts; however, the preventive actions discussed in Section 2 of RCSC publication "Specification for Structural Joints Using ASTM A325 or A490 Bolts," should still be addressed if A325 or A490 bolts are in the scope of a program.

The staff reviewed Table 3.9-6, "Loading Combinations, Stress Limits, and Allowable Stresses,"

in the LGS UFSAR and noted several components which appear to be within the scope of ASME Section XI, Subsection IWF that either called out SA325 bolts, which are equivalent to ASTM A325 bolts, or referenced ASME Division III, Subsection NF, which allows the use of SA325 bolts. It appears to the staff that there may be a discrepancy between the information in the UFSAR, and the information provided in the response to RAI B.2.1.32-2. The UFSAR appears to allow the use of SA325 bolts, and in at least one instance calls out SA325 bolts, while the RAJ B.2.1.32-2 response claims there are no ASTM A325 bolts within the scope of the program. Based on the information in the UFSAR, along with the RAI responses, it is not clear to that staff whether or not there are A325 or A490 bolts within the scope of the ASME Section XI, Subsection IWF program.

ENCLOSURE

- 2 Request Verify that there are no ASTM A325, F1852, or A490, or ASME equivalent, bolts in the scope of the ASME Section XI, Subsection IWF program. If there are no ASTM A325, F1852, or A490 bolts within the scope of the program, explain the discrepancy in the UFSAR. If the bolts are within the scope of the ASME Section XI, Subsection IWF program. explain how the preventive actions discussed in Section 2 of "Specification for Structural Joints Using ASTM A325 or A490 Bolts" are addressed. or why they are unnecessary. If ASTM A325. F1852. or A490 bolts typically within the scope of ASME Section XI. Subsection IWF program are being managed by a different program (e.g. Structures Monitoring) explain how that program addresses the recommendations of the GALL Report ASME Section XI. Subsection IWF program.

Letter to M. Gallagher from R Kuntz dated June 22, 2012

SUBJECT:

REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE.

LIMERICK GENERATING STATION LICENSE RENEWAL APPLICATION (TAC NOS. ME6555, ME6556)

DISTRIBUTION:

HARDCOPY:

DLR RF E-MAIL:

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Mr. Michael P. Gallagher Vice President, License Renewal Projects Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348

SUBJECT:

REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LIMERICK GENERATING STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. MES555 AND MES55S)

Dear Mr. Gallagher:

By letter dated June 22, 2011, Exelon Generation Company, LLC submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54, to renew the operating licenses for Limerick Generating Station, Units 1 and 2, for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The staff is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review.

These requests for additional information (RAls) were discussed with Christopher Wilson, and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me by telephone at 301-415-3733 or bye-mail at Robert. Kuntz@nrc.gov.

Sincerely, IRA!

Robert F. Kuntz, Senior Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353

Enclosure:

Requests for Additional Information cc w/encl: Listserv DISTRIBUTION:

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