ML110610340
| ML110610340 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 02/24/2011 |
| From: | Morris J Duke Energy Carolinas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| GL-08-001 | |
| Download: ML110610340 (4) | |
Text
Duke Energy.
Carolinas JAMES R. MORRIS, VICE PRESIDENT Duke Energy Carolinas, LLC Catawba Nuclear Station / CNO1 VP 4800 Concord Road York, SC 29745 803-831-4251 803-831-3221 fax February 24, 2011 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 ATTENTION: Document Control Desk
Subject:
Duke Energy Carolinas, LLC (Duke Energy)-
Catawba Nuclear Station, Units 1 and 2 Docket Nos. 50-413 and 50-414 Generic Letter 2008-01 Commitment Change
Reference:
Duke Energy Generic Letter (GL) 2008-01, 9 month response, dated October 13, 2008 In Duke Energy's response to GIL 2008-01, the methods for identifying and quantifying gas voids in ECCS and Containment Spray (NS) piping for Catawba were summarized. The method identified for use in NS piping downstream of the NS heat exchangers was venting (see attached). Gas could accumulate in these areas after performance testing of the NS System pumps. Catawba will also utilize Ultrasonic Testing (UT) as an alternative to venting in these locations. UT provides an equally acceptable method for identifying and quantifying accumulated gas voids. Catawba is currently using UT in other piping areas described in our GL 2008-01 response.
This letter commits Catawba to the use of UT as an alternative to venting for the piping described above.
If any questions arise or additional information is needed, please contact P. W. Barrett at (803) 701-4138.
ies R. Morris Attachment 1~34-www. duke-energy, corn
Document Control Desk Page 2 February 24, 201.1 xc (with attachment)
V.M. McCree Regional Administrator U.S. Nuclear Regulatory Commission - Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257 G.A. Hutto, III Senior Resident Inspector (CNS)
U.S. Regulatory Commission.
Catawba Nuclear Station J. H. Thompson (addressee only)
NRC Project Manager (CNS)
U. S. Nuclear Regulatory Commission One White Flint North, Mail Stop 8-G9A 11555 Rockville Pike Rockville, MD 20852-2738
Document Control Desk Page 3 February 24, 2011 James R. Morris affirms that he is the person who subscribed his name to the foregoing Statement, and that all the matters and facts set forth herein are true and correct to the best of his knowledge.
/arrl Mri, Vice President Subscribed and sworn to me:
2.b a -i Date Notary PIT)IC My commission expires:
/eQ--
Date Seal 6
.U~T-Catawba Nuclear Station K*a**
Page 11 of 13 Summary of Committed Corrective Actions Corrective Action 1: Monitor the status of the TSTF effort to provide revisions to NUREG-1431 Technical Specifications and their associated Bases in regard to the periodic venting surveillance. Catawba will evaluate the resolution of TS issues with respect to the changes contained in the TSTF traveler, and submit a license amendment request based on this evaluation within 180 days following NRC approval of the TSTF.
Status: Waiting on TSTF approval process.
Schedule: To be determined by TSTF approval process.
Basis: The completed and proposed procedure revisions will maintain the ECCS and Containment Spray systems operable in the interim.
Corrective Action 2: Revise the UFSAR in regard to gas accumulation and venting consistent with the guidance described in GL 2008-01.
Status: Incomplete.
Schedule: Approve UFSAR change packages by January 31, 2009.
Basis: Schedule allows sufficient time to complete the change packages in a timely manner following completion of the GL 2008-01 response. Completion of this corrective action is not a requirement of operability.
Corrective Action 3: Thequarterly surveillance procedures that operate the Residual Heat Removal pumps in a recirculation alignment require the heat exchanger outlet valves to be closed to avoid any fluid momentum effect. Consistent with the recommendations of the Generic Letter, this practice will be discontinued to alleviate any preconditioning concerns.
Status: Complete exchanger is recommended after pump testing since gas could be transported downstream C not0ifiaon if gas is found above the low threshold specified in the procedure.
Status: Complete
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