ML050470226
| ML050470226 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 02/08/2005 |
| From: | Barron H Duke Energy Corp, Duke Power Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| TAC MC2547, TAC MC2548 | |
| Download: ML050470226 (8) | |
Text
- P Duke c WPower, A Duke Energy Company HENRY B. BARRON Group VP, Nuclear Generation and Chief Nuclear Officer Duke Power EC07H / 526 South Church Street Charlotte, NC 28202-1802 Mailing Address:
P. 0. Box 1006 - EC07H Charlotte, NC 28201-1006 February 8, 2005 704 382 2200 704 382 6056 fax hbarron@duke-energy. corn U.S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D.C. 20555 Subject':
Duke Energy Corporation Catawba Nuclear Station, Units 1 and 2 Docket Numbers 50-413 and 50-414 Proposed Technical Specifications Amendments 3.3.2, Engineered Safety Feature Actuation System Instrumentation 3.3.6, Containment Air Release and Addition Isolation Instrumentation Reply to Request for Additional Information TAC Numbers MC2547 and MC2548
Reference:
Letter from Sean E. Peters, NRC to D.M. Jamil, Duke Energy Corporation, dated November 18, 2004 The reference letter transmitted a Request for Additional Information concerning the subject license amendment request.
The license amendment request was submitted to the NRC on March 22, 2004 and proposed to revise the Catawba Nuclear Station Facility Operating Licenses and Technical Specifications to change the surveillance frequency on selected Engineered Safety Features Actuation System (ESFAS) slave relays from 92 days to 18 months.
The attachment to this letter contains Duke Energy Corporation's reply to the Request for Additional Information.
There are no regulatory commitments contained in this letter or its attachment.
Pursuant to 10 CFR 50.91, a copy of this letter is being sent to the appropriate state official.
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U.S. Nuclear Regulatory Commission Page 2 February 8, 2005 Inquiries on this matter should be directed to L.J. Rudy at (803) 831-3084.
Very truly yours, Henry B. Barron LJR/s Attachment
U.S. Nuclear Regulatory Commission Page 3 February 8, 2005 Henry B. Barron 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.
A47 4A Henry B. Barron, Group Vice President and Chief Nuclear Officer Subscribed and sworn to me: A2 D e otary/"Pu'i i
My commission expires:
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U.S. Nuclear Regulatory Commission Page 4 February 8, 2005 xc (with attachment):
W.D. Travers U.S. Nuclear Regulatory Commission Regional Administrator, Region II Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, GA 30303 E.F. Guthrie Senior Resident Inspector (CNS)
U.S. Nuclear Regulatory Commission Catawba Nuclear Station S.E. Peters (addressee only)
NRC Project Manager (CNS)
U.S. Nuclear Regulatory Commission Mail Stop 0-8 G9 Washington, D.C. 20555-0001 H.J. Porter, Director Division of Radioactive Waste Management Bureau of Land and Waste Management Department of Health and Environmental Control 2600 Bull St.
Columbia, SC 29201
U.S. Nuclear Regulatory Commission Page 5 February 8, 2005 bxc (with attachment):
L.A. Keller -
CNO1RC L.J. Rudy -
CNO1RC K.E. Nicholson -
CNOIRC K.S. Lyall -
CN03CE A.S. Gullion -
CN03CE C.J. Thomas -
MGO1RC R.L. Gill, Jr. -
EC05P NCMPA-1 NCEMC PMPA SREC Catawba Document Control File 801.01 -
CN04DM Catawba RGC File -
CNOIRC ELL -
ECO50
ATTACHMENT REPLY TO NRC REQUEST FOR ADDITIONAL INFORMATION
REQUEST FOR ADDITIONAL INFORMATION DUKE POWER COMPANY CATAWBA NUCLEAR STATION, UNITS 1 AND 2 DOCKET NOS. 50-413 AND 50-414 The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal dated March 22, 2004, regarding a request to change the surveillance frequency on selected Engineered Safety Features Actuation System slave relays from 92 days to 18 months.
The NRC staff has identified the following information that is needed to enable the continuation of its review.
In Attachment 3, Page 2 of your submittal, you describe the program that evaluates the adequacy of the proposed surveillance interval if two or more Type AR relays fail within a 12-month period.
Given that the proposed surveillance interval is 18 months, describe the situations in which two failures could be detected within 12 months.
Furthermore, describe how you would use operating experience at other units in your evaluation of the adequacy of the 18-month interval.
Duke Energy Corporation Reply:
Since the surveillance interval is being extended to 18 months, it will be conservatively assumed that if two or more failures are detected during any performance of the surveillance on either Catawba unit, that the threshold of two or more failures in a 12-month period will have been reached.
This will trigger an evaluation of the adequacy of the 18-month surveillance interval.
Also, since the 18-month surveillances are conducted during refueling outages, with the Unit 1 and Unit 2 outages generally staggered such that they occur within 12 months of each other, two or more total failures in a 12-month period would be detected by adding the total number of failures observed during consecutive Unit 1 and Unit 2 outage surveillances.
This would also trigger an evaluation of the adequacy of the 18-month surveillance interval.
In addition, operating experience from other stations (including Duke Energy Corporation's McGuire Nuclear Station) will be reviewed by the system engineer as part of overall system health monitoring.
Any failure information will be assessed for applicability to Catawba in evaluating the adequacy of the 18-Attachment Page 1
A month surveillance interval. Common sources of operating experience information include, but are not limited to, NRC correspondence, INPO's
":Nuclear Network, and vendor technical information.
The purpose of utilizing operating experience from other stations is to assess the overall performance of similar relay types for applicability to Catawba.
It is not to be inferred that individual relay failures observed at other stations (including McGuire) will be automatically counted toward the two failures in a 12-month period threshold for Catawba.
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