ML20065P283

Interim Deficiency Rept Re Defective Governor Drive Coupling in Emergency Diesel engine-generator Sets from Transamerica Delaval.Initially Reported on 820909.Coupling Will Be Replaced.Also Reportable Per Part 21

ML20065P283
Person / Time
Site:	Harris
Issue date:	10/07/1982
From:	Parsons R CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-11, REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8210220484
Download: ML20065P283 (4)

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A CD&L Carolina Power & Light Company P. O. Box 101, New Hill, N. C. 27562 October 7, 1982 Mr. James P. O'Reilly NRC-ll United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 3100) p, Atlanta, Georgia 30303 g -j g  ;

c3 yz CAROLINA POWER & LIGHT COMPANY ] (

SHEARON HARRIS NUCLEAR POWER PLANT 1985 900,000 KW - UNITS 1 & 2 ro z[W r 'O

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DEFECTIVE GOVERNOR DRIVE COUPLINGS , d$

PURCHASE ORDER NY-435079 - ITEM 101 g Q3

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Dear Mr. O'Reilly:

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w V Attached is an interim report on the subject 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 acccnplished by January, 1983.

Thankyouforyourconsiderationinthismatter.k Youra vey truly, y C::

R. M. Pa'rens Project Ge'neral Manager Shearon Harris Nuclear Power Plant RMP/sh I -

Attachment '

cc: Mr. G. Maxwell (NRC-SHNPP)

Mr. V. Stello (NRC) l l

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I 8210220484 821007 O -@

PDR ADOCK 05000400

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CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 Interim Report October 4, 1982 Reportable Under 10CFR50.55(e) and 10CFR21

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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 temperature, oil atmosphere enco"ntered in the engine's gear case.

DATE PROBLEM '

OCCURRED: Refer to sectioi 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.

. In the high temperature, oil atmosphere encountered in

'J 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 availability.

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REASON DEFICIENCY IS 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 diesel engines are currently on " hold" at the Shearon Harris site. The isoprene governor drive coupling will be 1 replaced according to the instructions attached to the Transamerica DeLaval to CP&L letter dated August 18, 1982.

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 January 1983.

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