ML20129D908
| ML20129D908 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 07/12/1985 |
| From: | Tucker H DUKE POWER CO. |
| To: | Adensam E, Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20129D911 | List: |
| References | |
| TAC-57673, TAC-57674, NUDOCS 8507160683 | |
| Download: ML20129D908 (3) | |
Text
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t DUKE POWER GOMPANY P.O. BOX 33189 CHARLOTTE. N.C. 28242 HAL B. TL'CKER retzenown
_Qme ne (704) 373-4 sat July 12, 1985 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Ms. E. G. Adensam, Chief Licensing Branch No. 4
Subject:
McGuire Nuclear Station Docket Nos. 50-369 and 50-370 Technical Specification Amendment for Containment Ice Condenser
Dear Mr. Denton:
Attached are proposed license amendments to Facility Operating Licenses NPF-9 and NPF-17 for McGuire Nuclear Station Units 1 and 2, respectively.
The proposed amendments would extend the surveillance interval for the Ice Condenser Doors to at least once every 18 months. The current Technical Specification (4.6.5.3.1) requires the surveillance of the Ice Condenser Doors at least once every 9 months.
The Technical Basis (3/4.6.5.3.) for the surveillance requirements is to provide reasonable assurance that the doors should remain closed during normal operation and open during a LOCA or a high energy line break. Duke Power Company's review of the Ice Condenser Doors has demonstrated that the closure of the doors during normal operation is adequately addressed by the Continuous Door Position Monitoring System. The opening of the ice condenser doors during a high energy line break is also not in doubt as a minor increase in pressure (of 0.1 psig or more) exerts a force of about 10 times that employed in surveillance and testing of these doors.
In the case of a real accident, the ice condenser doors are certain to open since the doors do not have the structural strength to remain or be restrained shut against a pressure rise 'of 2 or 3 psig. The ice condenser doors meet their functional requirements as envisaged in the Technical Specification Basis even if no periodic surveillance and testing is performed on these doors. The doors do not contain any components, failure of which, would prevent the doors from performing their intended function. The door hinges, for instance are designed to preclude galling or self welding, the door springs only hold the door in neutral position but otherwise exert a very small torque, and the door seals prevent formation of condensation which could freeze the door.
Duke Power Company has determined that extension of the surveillance interval for the ice condenser doors from 9 to 18 months is not a safety concern. Attachment I contains the proposed changes to the Technical Specification. Attachment II provides Justification and Safety Analysis in support of the proposed changes. Attachment III provides an Analysis of Significant Hazards Consideration for the proposed changes as required by 10CFR50.91. The proposed changes have no safety or environmental impact.
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8507160603 850719 ^
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Mr. Harold R. Denton, Director July 12,1985 Page This request involves one application for amendment to McGuire's Technical Specifications. Accordingly, pursuant to 10CFR 170.21 a check for $150.00 is enclosed.
Please feel free to contact us if you require any additional information.
Very truly yours.
O.;tl k r
Hal B. Tucker RLG/mjf Attachments cc:
Dr..J.
Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 2900 Atlanta, Georgia 30323 W. T.. Orders Senior Resident inspector-McGuire Nuclear Station Mr. Dayne Brown, Chief Radiation Protection Branch Division of Facility Services Department of Human Resources P. 0. Box 12200 Raleigh, North Carolina 27605 l
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Mr. ' Harold R Danton, Director
' July 12, 1985 Page ;
HAL B. TUCKER, being duly sworn, states that he is Vice President of Duke Power Company; that he is authorized on the part of said Company to sign and file with the Nuclear Regulatory Commission this revision to the McGuire Nuclear Station License Nos. NPF-9 and NPF-17 and that all statements and matters set forth therein are true and correct to the best of his knowledge.
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'-Hal B. Tucker, Vice President l
Subscribed and sworn to before me this 12th day of July i
b u.A bh sh 0 Notary Public My Commission Expires:
hao 20 1993 s
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