ML053490219

Oyster Creek Generating Station, Additional Commitments Associated with Application for Renewed Operating License

ML053490219
Person / Time
Site:	Oyster Creek
Issue date:	12/09/2005
From:	Swenson C AmerGen Energy Co, Exelon Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
%dam200604, 2130-05-20238
Download: ML053490219 (3)

Text

C.N. (Bud) Swenson Telephone 609.971.2300 AmerGen An Exelon Company SM Site Vice President www.exeloncorp.com bud swenson@amergenenergycom Oyster Creek Generating Station US Route 9 South PO. Box 388 10 CFR 50 Forked River, NJ 08731 10 CFR 51 10 CFR 54 2130-05-20238 December 9, 2005 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Oyster Creek Generating Station Facility Operating License No. DPR-16 NRC Docket No. 50-219

Subject:

Additional Commitments Associated with Application for Renewed Operating License - Oyster Creek Generating Station

Reference:

Letter from C. N. Swenson (AmerGen Energy Company, LLC) to USNRC "Application for Renewed Operating License" dated July 22, 2005 This letter formalizes AmerGen's commitment to perform two specific activities that are related to renewal of the Oyster Creek Generating Station operating license. AmerGen previously discussed its intent to perform these activities with the NRC Audit team in October 2005, during the Aging Management Program Audit at the Oyster Creek site. The two activities discussed below will be implemented prior to the proposed period of extended operation.

First, AmerGen will revise the Oyster Creek UFSAR to incorporate an updated metal fatigue analysis limit for reactor coolant pressure boundary components, consistent with the current requirements of 10CFR 50.55a for operating plants, into the Oyster Creek current licensing basis. Specifically, this revision will change the cumulative usage factor from 0.8 to 1.0 in accordance with ASME Section Xl, Appendix L.

Second, AmerGen will perform one-time inspection of the drywell shell in the sand bed region, conducting ultrasonic testing (UT) thickness measurements. These one-time UT measurements will be taken from inside the drywell at locations tested in the 1990s such that the new measurements can be compared with the earlier testing results. The last UT measurements in the sand bed region, taken during the 16th Refueling Outage in 1996, along with the UT measurements taken in 1994, confirmed that the surface coating applied to the liner in that region in 1992 had arrested corrosion that was previously occurring. Based upon our discussions with the Staff, AmerGen will take these additional measurements to provide a high degree of assurance that the surface coating applied to the liner has arrested corrosion that was previously occurring there. This will confirm that periodic inspections of the coating condition, already planned as part of the aging management program for the containment, will ensure the long-term integrity of the drywell shell in the sand bed region.

Specific details describing these commitments are provided in the Enclosure to this letter. t41

December 9, 2005 Page 2 If you have any questions regarding this information, please contact Fred Polaski, Manager, License Renewal, at 610-765-5935.

I declare under penalty of perjury that the foregoing is true and correct.

Respectfully, Executed on al / 20os C. N. Swenson \

Site Vice President, Oyster Creek Generating Station AmerGen Energy Company, LLC

Enclosure:

Summary of Commitments cc: Regional Administrator, USNRC Region I NRC Project Manager, NRR - License Renewal, Safety NRC Project Manager, NRR - License Renewal, Environmental NRC Project Manager, OCGS, Part 50 NRC Senior Resident Inspector, OCGS Bureau of Nuclear Engineering, New Jersey Department of Environmental Protection Oyster Creek File No. 05040

December 9, 2005 Page 3 Enclosure Summary of Commitments The following table identifies commitments made in this document. Any other actions discussed in the submittal represent intended or planned actions. They are described to the NRC for the NRC's information and are not regulatory commitments.

Committed One-Time Commitment Date or Action Programmatic Outage (Yes/No) (Yes/No)

1. AmerGen will revise the Oyster Creek Prior to period Yes No UFSAR to update the current licensing of extended basis to reflect that a cumulative usage operation factor of 1.0 will be used in fatigue analysis for reactor coolant pressure boundary components, as endorsed by the NRC in 10 CFR 50.55a.

2. AmerGen will perform a set of one-time Prior to period Yes No thickness measurements in an area of of extended the containment structure (drywell) operation known as the "sand bed region" to confirm that the surface coating applied to this region of the containment has arrested corrosion. These measurements will be performed using ultrasonic testing from inside the drywell.

The locations of these measurements will be a sample of areas previously inspected (in the 1990s) and identified as having exhibited corrosion. Inspecting the same locations will allow comparison of results in order to confirm that the surface coating applied in 1992 has arrested corrosion that had previously occurred.