ML20079R737
| ML20079R737 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 01/27/1994 |
| From: | Mcmeekin T DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9402090253 | |
| Download: ML20079R737 (3) | |
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Duke 1%rer Company T C %muts Ah;Cuire Nudear Generation Departmcat Yke President
,12:00 Hagm ferry R,wd (MG01A)
(704)875-4800^
Hunternille. IVC 2E018&i85 (704)3754809 FM DUKE POWER January 27, 1994 U.S.
Nuclear Regulatory Commission Washington, DC 20555 Attention:
Document Control Desk
Subject:
McGuire Nuclear Station, Units 1 and 2 Docket Nos. 50-369 and 50-370 Supplement to Technical Specification Amendment Penetration Testing Commitment Gentlemen:
By letters dated June 23, 1993 and July 1,
1993, Duke Power submitted a proposed amendment to the Technical Specifications for the McGuire Nuclear Station which revised the allowable containment bypass leakage.
In the Background / Justification section of this submittal, Duke Power. committed to increased monitoring of the bellows leakage. This increased monitoring consisted of two parts.
The first was a monthly test plan to pressurize the between the plies volume of the bellows to 4 psig in order to trend integrity of the bellows and to extrapolate the ef fect of integrity on total bypass leakage.
The second part was to test the entire bellows penetration by pressurizing to 15 psig in the event of-a unit shutdown to Mode 5 or 6 for the remainder of cycle 9.
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After the initial 4 psig test at full temperature conditions, the
-l bypass leakage was extrapolated and determined to leave essentially no margin in the Technical Specification bypass leakage requirement.
An epoxy repair was performed on the identified leaking portions of the outer ply of the bellows.
This repair allowed more of the leakage to be categorized-as non-bypass leakage.
During the September 1993 Unit 1 outage, while in Mode 5, a.15.psig test was performed on the penetration that showed the epoxy repair to the outer ply had not affected the total penetration leakage.
Since the overall integrity of the penetration has been relatively stable, Duke Power feels that the monthly 4 psig test-is. adequate to identify any adverse trends in penetration l'ntegrity.. Also, the -
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- performance of the 15 psig test is very costly f rom both a manpower L
and' schedule perspective and does not appear to yield any L
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. additional significant data in regard.to penetration integrity.-
Therefore, Duke Power plans to delete the 15 psig test from the commitment.
1 If there are any questions, or if additional data is required, please call Larry Kunka at (704) 875-4032.
i Very truly yours, hI bv T.C.-McMeek1i n
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Mr.
S.
D.
Ebneter Administrator, Region II U.S.. Nuclear Regulatory Commission 101 Marietta St.,-NW, Suite 2900 Atlanta, GA 30323 1
Mr. Victor Nerses U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D.C.
20555 Mr. George F. Maxwell NRC Resident Inspector McGuire Nuclear Station Mr. Dayne Brown, Director Division of Radiction Protection
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P.O -Box 27687
- Raleigh, NC 27611-7687 American Nuclear Insurers Town Center Suite 3005 29 S Main St.
West Hartford, CT 06107-2445
- l M & M Nuclear Consultants
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1221 Avenue of the Americas New York, NY 10020 q
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