ML20108C781
| ML20108C781 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 10/02/1984 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-84 SD-414-84-20, NUDOCS 8411190069 | |
| Download: ML20108C781 (3) | |
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' DUKE POWER COMPANY?
P.O. EBOX 33189 CHARLOTTE, N.C. 28949 HALB. TUCKER 3'/QC (198k f.* y _
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October
-Mr; James P. O'Reilly, Regional-Administrator
'_U. S. Nuclear Regulatory. Commission
--Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303 i
Re: Catawba Nuclear Station e
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 414/84-20. Also, please note that, pursuant to 10 CFR 21, this deficiency has been reported for Unit 1 and has subsequently been corrected.
Very truly yours, d k.-
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Hal~B. Tucker LTP/mjf Attachment cc: Director Mr. Robert Guild, Esq.
Office of Inspection & Enforcement Attorney-at-Law U. S. Nuclear Regulatory Commission P. O. Box 12097 Washington, D. C. 20555 Charleston, S. C. 29412 NRC Resident Inspector Mr. Jesse L. Riley Catawba Nuclear Station Carolina Environmental Study Group 854 Henley Place Palmetto Alliance Charlotte, North Carolina 28207 2135 Devine Street Columbia, South Carolina 29205 INPO Records Center Suite 1500 1100 Circle 75 Parkway Atlanta, Georgia 30339 8411190069 841002 PDR ADOCK 05000414 OFFICIAL COPY S
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- CATAWBA NUCLEAR ~ STATION-i h
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t REPORT NUMBER: SD 414/84-20 t.
3 JREPORT'DATE:
October 2,'1984' y
FACILITY:' Catawba Nuclear SUtion Unit 2
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IDENTIFICATION OF DEFICIENCY:
A total of twenty-six Unit 2 14 and-16 NA1 Rotork Electric Motor Operators were reported to Duke by Rotork as having nitrile thrust base 0-rings. :The thrust base 0-ring material should have been viton. The deficiency was identified on August'3,~1984 INITIAL REPORT:
On August 31, 1934 H. Dance and V. Brownlee. NRC Region II, Atlanta, CA were notified of the subject deficiency by.W. O. Henry, T. L.:Utterback, R. L. Oakley-and J. H. Hensel of Duke Power Company, Charlotte,.N. C. 28242.
COMPONENT'AND/OR SUPPLIER:
Rotark Model 14NAl and 16NA1 operators.
DESCRIPTION OF DEFICIENCY:
The twenty-six operators supplied with nitrile thrust base 0-rings do not' comply with the environmental qualification report for the inside-containment model NAL operator. The qualification report is based on tests of dperators using viton thrust base 0-rings. Eight operators are currently assigned to inside and outside-containment applications (the. remaining 18 are spare),
where environments can reach 330'F and radiation levels of 1.1x108 rads total integrated dose. The viton 0-rings have been tested to temperatures of 340*F and radiation levels of 2x108 rads in the thrust base application. The nitrile 0-rings have not been tested to these conditions. Frommajerial publications'the nitrile material is rated for only 200*F and 1x10 rads.
ANALYSIS OF SAFETY IMPLICATIONS:
Failure of these 0-rings would result in a loss of gear train oil, and subsequent loss of valve / operator function.
Operators furnished with nitrile 0-rings have not been qualified by environ-mental testing and therefore cannot be relied upon to assure operability.
Section 3.9.3.2.2 " Operability Assurance of Duke' Safety-Related Active Pumps and Valves" of the FSAR requires that the operators for active valves be qualified by environmental qualification.
Tag numbers affected were: 2NV037A, 2KCC40B, 2SM074B, 2SM075A, 2SM076B, 2SM077A, 2NC195B and 2NC196A. The 18 spare operators could have been used Lin a number of safety related applications.
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CORRECTIVE ACTION:
All affected operators in Unit 2 are to be returned to Rotork for Changeout of the 0-rings. All work will be completed by January -1,- 1985. -
' Pursuant to 10CFR21, one of the subject operators,. tag number IKC425A was found in. Unit.l.
This operator has been replaced.
McGuire Nuclear Station was also affected by the Rotork notification. Their
.affected operators have been removed and returned to Rotork.
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