ML20010J564

Interim Deficiency Rept Re Defective Valve Springs on Diesel Engines,Initially Reported 810828.Transamerica Delaval Pursing Problem.Valve Springs Will Be Replaced When Engines Are Installed on Foundations & Flywheel Installation

ML20010J564
Person / Time
Site:	Harris
Issue date:	09/25/1981
From:	Chiangi N CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8110050354
Download: ML20010J564 (4)

Text

{{#Wiki_filter:__ __ _ - __ - - - - - - - - _ ___ - _ Carolina Power & Light Company

                .e September 25,.1981 I S-h. , ; \

r,s. File: SH N-2/18 ,J ' ([[r n .. 'llp Item 61 3 , oct . 'll)

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Mr. James P. O'Reilly - 3- IO8/s United States Nuclear Regulatory Comeission

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                                                                                                                                                                                      #'%,YSO Region II                                                                                                                                                 ;

101 Marietta Street, Northwest . Atlanta, Georgia 30303 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NOS. 50400, 50401, 50402, 50403 DEFECTIVE VALVE SPRINGS ON DIESEL ENGINES

Dear Mr. O'Reilly:

Attached is an interim report on the subject item which was deemed as reportable on August 28, 1981. Trana=== ica DeLaval and CP&L are pursuing this matter, and it is currently projer*4d that the final report will submitted during July, 1981. As staten in the interim mport, this date is - dependent upon installation of the engines on their foundations and flywheel installation. Thank you for your consideration in this matter. RDB/gea Tours very truly, Attachment co: Mr. G. Maxwell W/A * ' Mr. V. Stello (2) W/A , (v1 N. . 1- ger Engine & Construction Quality Assurance / Quality Control [$Y S I I 8110050354 610925 PDR ADOCK 05000400 S ppg 411 Fayetteville Street

• P. O. Box 1551
• Raleign. N C. 27602

1 a' CAROLI 1GL POWER. & LIGHI COMPANY SMARnN HARRIS NUCLEAR. POWEll PLANT UNIT NO ~L , , INTun m REPORT September 24,. 1981 . Reportable Uader 10CFR50.55(e) Reportab7s Undu 10CFR2L e$ e f . 1) C a

o d SUBJEC"*: Shearon Harris Nuct. ear Power Plant / Unit No. 1 10CER50.55(e) and 10CFR21, reportable deficiency. Valve springs for emergency diesel engine-generator sets purchased.under Purchase Order NY 435079 from Transamerica DeLaval,. Inc. ITEM: rne-ak= ansL avhanse valve springs installed ~ ist engina cylindas- head assemblies Total of 128. springs in. two d4= M engines SUPPLIED BY:: Tranaamm-ica. DeLaval, Inc. Oakland,. California-Springs manufactured ~ by Molrosa Spring and Tool Works,. 0=ht =nd, California, as subvendor to Trrs~merica. DeLaval. NATURE OF DEFICIENCY: Tranammarica DeLaval, Inc., shipped two diesel engines en the CP(nL site om Purchase Order NT-435079 in May and. June 1981. In Auguse,.1981,. Tranammarien DeLaval advised CP&L that the angin== may conth valve springs which were not shot-peened properly. Tha shot-peening is

                                -         Decessary to- relieve external stresses incurred in.
                                        . cold-working the spring wire                         The lack of shot-pe=ning could. Isad. ca fatigue failure, which. then would affect angin- avaiIahilitv Telephone conversations with. i'r=n--r4< = DeLaval. ard a visual inspection confirmed that the defective valve springs.had.been installed in the two engines shipped to the Shearon Harris plant site                                                 ,.

DATE PE0HLEM-OCCURRED:- - Refer ::o section above. . DATE PROBLEM REPORTED: August 28,. 1981 - CP&L (L. E Jones) notified the NRC, Region II,. (R Butcher) that this item was reportabla under 10CFR50 55(e) and 10CFR,. Part 21. SCOPE 0F PROBLEMr The deficiency involves the two diesel engines shipped. on Purchase Order NT-435079. These engines have defective valve springs installed. S_AFETY DfPLICATION: The diesel engine-generator sets supply power to the 2S7 buses in case of a loss of both the normal on site and off-site power sources. _y. -- , , - - - ,.- ,-, -,y -

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P i The improper shot-peenintr of the valve spring could lead to failure of the spring. If the valve spring i fails, engine availability could be affected. REASON DEFICIENCY IS REPORTABLE: If left uncorrected, failure o: che valve. spring could result in loss of the emergency on-site AC power supply. CORRECTIVE ACTION: The A4===1 an=4n=a have been placed on " hold" at the Shearon Harris site The valve springs will be replaced when the enginer are installed' on their foundations. Valve spring change-out requirea the ability to bar the engina over whica canact be-accomplished' until the engine is sitting on its foundation with the flywheel installed. The an=4n== are currently in storage and are expected to.  ? be set on. their fannd=e4ana in June 1382 i, Transamerica DeLaval har removed all defectiva springs fromr. stock. and. has enkan extra receiving-inspection

                        ====nrea en assura this problea does not reoccur.

FINAL REPORT: A. final z.ywa.i will be. issued once the corrective action described above has been completed. It is currently projected. that the submittal date will be July 1982 O ___ _ . - - -}}