ML20083B531

Third Interim Deficiency & Part 21 Repts,Item 101 Re Defective Transamerica Delaval Governor Drive Coupling. Initially Reported on 820909.Isoprene Governor Drive Coupling Replaced.Final Rept by 840224

ML20083B531
Person / Time
Site:	Harris
Issue date:	12/14/1983
From:	Parsons R CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-156, REF-PT21-83 101, 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8312210190
Download: ML20083B531 (4)

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gaqq r,op & Light Company P. O. Box 101, New Hill, N. C. 27562 December 14,1983 Mr. James P. O'Reilly NRC-156 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)

Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRE NUCLEAR POWER PLANT 1986 900,000 KW - UNITS 1 & 2 DEFECTIVE GOVERNOR DRIVE COUPLING PURCHASE ORDER NY-435079, ITEM 101

Dear Mr. O'Reilly:

Attaciled is our third 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 Feburary 24,1984.

Thank you for your consideration in this matter.

Yours very truly, M  :!::sb R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/bk Attachment ec: Messrs. G. Maxwell /R. Prevatte (NRC-SIINPP)

Mr. R. C. DeYoung (NRC)

OFFICI AI, copy TE27 8312210190 831214 gDRADOCM 05000400 // 3 PDR

.c CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 THIRD INTERIM REPORT DECEMBER 14, 1983 DEFECTIVE C0VERNOR DRIVE COUPLING ITEM 101 (DDR 1056)

REPORTABLE UNDER 10CFR50.55(e) AND 10CFR21 L_

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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 contain an isoprene governor drive coupling and there is a potential problem since the material, 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 II (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.

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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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, suf ficient f requency instability could be induced that would resu] c in the engine's tripping off line, thereby affecting engine avrilability.

REASON DEFICIENCY IS REPORTABLE: If left uncorrected, failure of the governor drive coupling could result in the loss of the emergency on-site AC power supply.

CORRECTIVE ACTION: The isoprene governor drive coupling will be replaced in accordance with the instructions attached to the Transamerica DeLaval-to-CP&L letter dated August 18, 1982. This work requires capability to "bar" the engine over. The replacement part has been received on site. The installation of this equipment is to begin in mid-January.

FINAL REPORT: A final report will be issued once the corrective action described above has been completed. It in currently projected that the submittal date will be February 24, 1984.