ML20091M549
| ML20091M549 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 05/24/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-221, REF-PT21-84-283-000 101, PT21-84-283, PT21-84-283-000, NUDOCS 8406110337 | |
| Download: ML20091M549 (4) | |
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CP&L Carolina Power & Light Company 34 MAT JI P l14 {
P. O. Box 101, New Hill, N. C. 27562 May 24,1984 Mr. James P. O'Reilly NRC-221 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northy'est (Suite 2900)
Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRE NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 DEFECTIVE GOVERNOR DRIVE COUPLING PURCHASE ORDER NY-435079, ffEM 101
Dear Mr. O'Rellly:
Attached is our fifth interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21, on September 9,1982.
CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by November 20,1984.
Thank you for your consideration in this matter.
Yours very truly, fW W R. M. Parsons Project General Manager.
Shearon Harris Nuclear Power Plant RMP/sh Attachment ec: : Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC)
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4 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 FIFTH INTERIM REPORT MAY'22, 1984 DEPECTIVE GOVERNOR DRIVE COUPLING ITEM 101 (DDR-1056)
REPORTAELE UNDER 10CFR50.55(e)- AND 10CFR21 5
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SUBJECT:
Shearon Narris 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.
4 In June, 1982, Transamerica DeLaval notified CP&L that the engines contain an isoprene governor drive coupling and there is a potential problem since the material, 4
isoprene, is' designed for atmospheric use and it is not suitable for use in the high temperture, 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. J. Chiangi) notified the NRC Region 11 (A. Hardin) that this item was reportable under-10CFR50.55(e) and 10CFR21.
SCOPE OF PROBLEM:
The problem involves the two' diesel engines shipped on Purchase Order NY-435079.- These engines have isoprene governor. drive couplings installed.
l SAFETY IMPLICATION:
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.
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l In the high temperature, oil atmosphere encountered in the engine's gear case, the rubber deteriorates rapidly and ultimately fails. While the coupling is " fail safe" and will mechanically lock up when the element fails, sufficient frequency instability could be induced that would result in the engine's tripping off line, thereby affecting engine availabiltiy.
REASON DEFFICIENCY IS REPORTBLE:
If Icft uncorrected, failure of the governor drive coupling could result in the loss of the emergency on-site AC power supply.
CORRECTIVE ACTION:
The isoprene element of the governor drive coupling will be replaced in accordance with the instructions attached to the Transamerica DeLaval to CP&L letter dated August 18, 1982 (FCR-M-1067, Revision 1).
This work requires capability to "bar" the engine over.
FINAL REPORT:
A final report will be issued once the corrective action described above has been completed.
It is currently projected that the submittal date will be November 20, 1984.