ML20090K084
| ML20090K084 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 05/10/1984 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8405240008 | |
| Download: ML20090K084 (2) | |
Text
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g DUKE POWER GOMPAhT P.O. Box 33180 CHARLOTTE, N.C. 28242
'HALH. TUCKER g
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May 10, 1984 Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900
' Atlanta, Georgia 30303 Re: Catawba Nuclear Station Units 1 and 2 Docket Nos. 50-413 and 50-414'
Dear Mr. O'Reilly:
Pursuant to 10 CFR 50.55e, please find attached Significant Deficiency Report No. SD 413-414/84-08.
Very truly yours, f x4 d&
Hal B. Tucker LTP/php Attachment cc: Director INPO Records Center Office of Inspection & Enforcement Suite 1500 U. S. Nuclear Regulatory Commission 1100 circle 75 Parkway Washington, D. C. 20555 Atlanta, Georgia 30339 NRC Resident Inspector Mr. Robert Guild, Esq.
Catawba Nuclear Station Attorney-at-Law P. O. Box 12097 Palmetto Alliance Charleston, South Carolina 29412 2135 Devine Street Columbia, South Carolina 29205
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o CATAWBA NUCLEAR STATION REPORT NUMBER:
SD 413-414/84-08 REPORT DATE:
May 10, 1984 FACILITY: Catawba Nuclear Station, Units 1 & 2 IDENTIFICATION OF DEFICIENCY:
' Redundant penetration circuit protection was not provided for two permanently installed DC welding circuits per unit. Deficiency identified March 9, 1984.
INITIAL REPORT:
On April 10, 1984, A.
Ignatonis, NRC Region II, Atlanta, Georgia was notified of the subject deficiency by W. O. Henry of Duke Power Company, Charlotte, NC 28242.
COMPONENT AND/OR SUPPLIER: N/A DESCRIPTION OF DEFICIENCY:
When investigating a question raised by DPC Construction Department regarding the possibility of using a construction welding machine on a permanently in-stalled welding circuit, it was determined that redundant penetration protection was not provided for these circuits. These circuits supply multiple receptacles inside containment through penetrations 1(2) Pant 0223 and 1(2) Pent 0313. This deficiency is in non-conformance with Regulatory Guide 1.63 as identified in FSAR, Section 8.1.5.2.
ANALYSIS OF SAFETY IMPLICATIONS:
Although redundant protection as required per FSAR commitments was not provided, it is highly unlikely that these DC welding circuits would have ever presented any risk to public health and safety for the following reasons. The penetration circuit, as well as the DC welder, is protected from thermal overloads, excessive output amperage and output short circuiting by means of a fuse which is located on the front plate of the welder.
. Inherent circuit protection is provided in the design via a 200 amp receptacle and a #2/0 cable which are located outside of containment and are connected in series with the two parallel 250 MCM cables and associated penetrations which comprise each circuit. Furthermore, gas pressure on these penetrations is inspected once every six months.
CORRECTIVE ACTION:
To comply with Regulatory Guide 1.63 as identified in FSAR, Section 8.1.5.2, two circuit breakers connected in series will be provided in tne positive leg of the circuit between the DC welder and the penetration.
If these circuits are used prior to installation of the protective devices, use will be limited to prior to
. start-up and during outages. Furthermore, gas pressure will be checked on the associated penetration prior to start-up of the unit. These corrections will be completed by 3/1/25.
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