ML20126G666
| ML20126G666 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 05/22/1985 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-365, REF-PT21-85, REF-PT21-85-275-000 (DDR-1056), 101, PT21-85-275, PT21-85-275-000, NUDOCS 8506100176 | |
| Download: ML20126G666 (4) | |
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Cp&L Carolina Power & Light Company
- f. O.'lBix idl3NeFilill, N. C. 27562 May 22,1985 Dr. J. Nelson Grace NRC-365 United States Nuclear Regulatory Commission Region 11 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30323 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT I DEFECTIVE GOVERNOR DRIVE COUPLING PURCHASE ORDER NY-435079, ITEM 101
Dear Dr. Grace:
Attached is cur final report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21, on September 9,1982. With this report, Carolina Power and Light Company considers this matter closed.
If you have any questions regarding this matter, please do not hesitate to contact me.
Yours very truly, M WO R. M. Parsons Prcject Gcneral Manager Completion Assurance Shearon Harris Nuclear Power Plant RMPamh Attachment cc:
Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC) k l MOO DR A
PDR XEX-r19/1-055 pn
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1 Dr. 3.' Nelson Grace NRC-365 bcc:. Mr. H. R. Banks Mr. T. A. Baxter (Shaw, Pittman, Potts & Trowbridge)
Mr. C. S. Bohanan Mr. H.' W. Bowles Mr. C.' Carmichael (2)
Mr. N.' 3.~ Chiangi.
Mr.' A. B. Cutter Dr. T. S. Elleman i
Ms. S. F. Flynn Mr. G. L. Forehand Mr. 3. F. Garibaldi (Ebasco)
Mr. 3. L. Harness Mr. S. Hinnant
. Mr. P. C. Hopkins Dr. 3. D. E. Jeifries Mr. I. A. Johnson Mr. L. I. Loflin Mr. R. E. Lumsden Mr. R. L. Mayton, Jr.
Mr. M. A. McDuffie l
Mr. S. McManus Mr. C. H. Moseley, Jr.
s Mr. 3. F. Nevill Mr. D. L. Nordstrom (LIS)
Mr. R. M. Parsons.
Mr. M. Shannon (Westinghouse)
Mr. G. A. Sinders Mr. Sheldon D. Smith Mr. M. F. Thompson, Jr.
Mr. A. C. Tollison Mr. E. 3. Wagner Mr. R. A. Watson Mr. 3. L. Wills File Hl/A-2D Files H-X-0544 INPO: Records Center t
i XEX-rt9/2-OSS
t CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT No.1 FINAL REPORT May 22,1985 DEFECTIVE GOVERNOR DRIVE COUPLING ITEM 101 (DDR-1056)
REPORTABLE UNDER 10CFR50.55(e) AND 10CFR21 XEX-r19/3-055
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SUBJECT:
Shearon Harris Nuclear Power Plant - Unit No. I 10CFR50.55(e) and 10CFR21 Reportable Deficiency. Defective governor drive coupling installed in the emergency diesel engine-generator sets under Purchase Order NY-435079 from Transamerica DeLaval, Inc.
ITEM:
Isoprene governor drive coupling located in the engine's gear case. Part No. AK-007-000 SUPPLIED BY:
Transamerica DeLaval, Inc., Oakland, California.
The governor drive coupling is manufactured by Koppers Co., Inc.
NATURE OF DEFICIENCY:
Transamerica DeLaval, Inc. shipped two diesel engines to the Shearon Harris site on Purchase Order NY-435079 in May and June,1981.
In June,1982, Transamerica DeLaval notified CP&L that the engines contained an isoprene governor drive coupling and there was a potential problem since the material, isoprene, is designed for atmospheric use and it is not suitable for use in the high temperature, oil atmosphere encountered in the engine's gear case.
DATE PROBLEM OCCURRED:
Refer to section above.
DATE PROBLEM REPORTED:
September 9,1982 - CP&L (N. 3. Chiangi) notified the NRC Region II (A. Hardin) that this item was reportable under 10CFR50.55(e) and 10CFR21.
SCOPE OF PROBLEM:
The problem involved the two diesel engines shipped on Purchase Order NY-435079.
These engines had isoprene governor drive couplings installed.
SAFETY TUPETUATION:
The diesel-generator sets supply power to the ESF buses in case of a loss of both normal on-site and off-site power sources. In the high temperature, oil atmosphere encountered in the engine's gear case, the rubber deteriorates rapidly and ultimately falls.
While the coupling is " fall safe" and will mechanically lock up when the element falls, sufficient
, frequency instability could be induced that would result in the engine's tripping off line, thereby affecting engine availability.
REASON DEFICIENCY 15 REPORTABLE:
If lef t uncorrected, failure of the governor drive coupling could result in the loss of the emergency on-site AC power supply.
CORRECTIVE ACTION:
The defective coupling drive elements in l A-SA and IB-SB engine governors have been replaced with new elements. The required rework has now been verified by inspection personnel in accordance with appropriate site procedures.
With this action, CP&L considers this matter resolved.
XEX-rt9/4-OS5