ML20010G744
| ML20010G744 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 09/11/1981 |
| From: | Parker W DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8109220484 | |
| Download: ML20010G744 (2) | |
Text
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DUKE POWER CO?f PANY Powru Ucimixo 422 Sourn Cucacu Sinter, CnAumrrs, N. C. ana4a W I L LI A m4 O. PA R K E R. J R, Vict PRESIDENT ItttPMO'NC Anta 704 set.- Paoovevio.
September 11, 1981 v>4oes
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.. 'e Mr. James P. O'Reilly, Director gIlu f/ A3 U. S. Nuclear Regulatory Conunission Region II
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2 8 Jg g A 5 cA 101 Marietta Street, Suite 3100 g**g1Eg* roe 6
Atlanta, Georgia 30303 b
r Re: Catawba Nuclear Station N) j I.bgN Units 1 and 2 Docket Nos. 50-413 and 50-414
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Dear Mr. O'Reilly:
Pursuant to 10 CFR 50.55e, please find attached Significant Deficieny Report SD 413-414/81-19.
i Very truly yours,
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William O. Parker, Jr.
h RWO:1s Attachment cc: Director Resident Inspector Office of Inspection and Enforcement Nuclear Regulatory Commission U. S. Nucisar Regulatory Commission Catawba Nuclear Station Washington, D. C.
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t 8109220484Sg1 DR ADOCK 05 g
CATAWBA NUCLEAR STATION I
RfPORT NUMBER: SD-413, 414/81-19 REPORT DA~iE:
September 11, 1981 FACILITY:
Catawba Nuclear Station, l' nits 1 and 2 IDENTIFICATION OF DEFICIENCY:
Improper source of control air supplying the Diesel Generatcr Engine Control Panel.
INITIAL REPORT:
On August 13, 1981, Mr. J. Bryant of NRC Region II, Atlanta, Georgia was notified of this deficiency by Mr. L. M. Coggins and Mr. R.1.
Misenheimer of Duke Power Company, Charlotte, NC.
DESCRIPTION OF DEFICIENCY: During a review of the Diesel Generator Engine Starting Air System, it was discovered that the source of control air to the Diesel Generator Engine Control Panel was not safety-related.
In the event of a design basis accident, the potential loss of control air to the engine control panel could render both redundant diesel generators inoperable.
ANALYSIS OF SAFETY IMPLICATIONS:
Failure of the control air supply to the engine control panel could negiite the operation of the safety-related redundant diesel generators of the standby emergency power supply.
These diesel generators are essential for supplying emergency power in the event of a station blackout, or a design basis accident coincident with a loss of offsite power. This deficiency applies only % Catawba Nuclear Station and is not applicable to any of the other Duke nuclear stations.
CORRECTIVE ACTION: The Diesel Generator Starting Air Tanks provide a source of safety related air. A section of safety-related Deke Class C piping will be added to a spare 1" instrument connection on these air tanks to furnish the engine 3
control panel with safety-related air.
Each engine control panel will be connected to the two redundant air tanks provided for its particular engine.
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