ML20084N099

Interim Deficiency Rept Re Failure of Two High Pressure Fuel Oil Injector Lines on Emergency Standby Diesel Generators. Initially Reported on 830419.Program Initiated to Replace Existing Fuel Oil Injector Line Tubing

ML20084N099
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	05/20/1983
From:	James Smith LONG ISLAND LIGHTING CO.
To:	Allan J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, SNRC-892, NUDOCS 8306020455
Download: ML20084N099 (4)

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i LONG ISLAND LIGHTING COMPANY g wmpfm. ,

SHOREHAM NUCLEAR POWER STATION

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_ - - P.O. BOX 618. NORTH COUNTRY ROAD e WADING RIVER. N.Y.11792 Direct Dial Number May 20, 1983 SNRC-892 4

Mr. James M. All.n, Acting Regional Administrator Office of Inspection & Enforcement - Region 1 U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 LONG ISLAND LIGHTING COMPANY Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Mr. Allen:

On April 20, 1983, in accordance with 10CFR50.55(e), we reported verbally to Region 1 a potential deficiency concerning the failure of two high pressure fuel oil injector lines on the Shoreham Emergency Standby Diesel Generators. (The initial NRC notifica-tion was made on April 19, 1983, via recorded telephone message due to NRC unavailability. The detailed notification took place on April 20, 1983). .This letter serves as the 30-day written report on this potential deficiency.

DESCRIPTION OF THE POTENTIAL DEFICIENCY The three diesel generators which are affected were manufactured by the Transamerica Delaval Company of Oakland, California.

These diesel generators, 1R43*G-101, 1R43*G-102, and 1R43*G-103, are designed to provide standby emergency power for multiple plant safety-related systems.

The first failure of a high pressure fuel oil injector line occurred on March 3, 1983, during routine performance testing of Diesel Generator 102 (1R43*G-102). Fuel oil was discovered spraying from the high pressure fuel injection tubing for the #8 cylinder. Upon observing this, the tubing was replaced and the engine testing program was allowed to continue. On March 5, 1983, a fuci oil leak was discovered in the #6 cylinder high pressure fuel oil injector line on Diesel Generator #103. Preli-minary field inspections indicated that these failures may have 8306020455 830520 PDR ADOCK 05000322 S PDR FC-8935.1

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SNRC-892 May 20, 1983 Page 2 L

I resulted from~ construction and startup activity and other associ-  !

ated field conditions. .At that time, both of the failed lines b.

were sent to an independent laboratory for failure analysis. k' Preliminary information regarding the failure analysis was re- L ceived by'LILCO in mid-April. Upon receipt of this information,  !

discussions were held between LILCO and the laboratory conducting i the failure analysis. The following conclusion was reached: [

Contrary to the field inspections, preliminary failure analysis i

' indicates that both failures can be attributed to-fatigue induced [

by cyclic loading stemming from the high pressure pulsations of i the fuel oil injector pumps. In each case, longitudinal cracks <

c (the f ailures) ', originated at a- machine tool draw mark on the i internal wall of the tubing and propagated during the cyclic  !

loading.

CORRECTIVE ACTION AND ACTION TO PREVENT RECURRENCE ,

LILCO has embarked on a program to replace the existing fuel oil 4

-injector line tubing with shrouded type fuel lines. The shrouded

' design consists of a steel tube with both ends swaged to seat in the fuel pump and injector. A steel shield encloses the high pressure tube in its entirety and prevents uncontrolled. spray in the event of an injector tube rupture.

To preclude any future high pressure fuel oil injector line fail-ures, each 20' length of high pressure tubing used in the manufac- l-ture'of the shrouded fuel lines will be subjected to increased inspection requirements during fabrication. These requirements, -

which have been included in the purchase order, will entail -

cutting a transverse sample from both ends of each-length of high h pressure-tubing. The samples will be mounted, polished, etched, and examined to insure that the tubing is free from any potenti-ally injurious defects, such as the-ID draw marks noted in the y failed tubing. In addition, an' inspection report, detailing the findings of the sample examinations, will be supplied for-each length of high pressure tubing.

Replacement with'new. tubing with the requirements discussed above will: assure that a repetition of these failures will not occur. F Based on present material delivery schedules, it is anticipated ['

that the tubing replacement will be completed by the end of July, -(

1983. [_

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a ATTACHMENT 1 Lawrence Brenner, Esq. Herbert H. Brown, Esq.

Administrative Judge Lawrence Coe Lanpher, Esq.

Atomic Safety and Licensing Karla J. Letsche, Esq.

Board Panel Kirkpatrick, Lockhart, Hill U.S. Nuclear Regulatory Commission Christopher & Phillips Washington, D.C. 20555 8th Floor 1900 M Street, N.W.

Washington, D.C. 20036 Dr. Peter A. Morris Adrainistrative Judge Atomic Safety and Licensin9 Mr. Marc W. Goldsmith Board Panel Energy Research Group U.S. Nuclear Regulatory Commission 4001 Totten Pond Road Washington, D.C. 20555 Waltham, Massachusetts 02154 Dr. James H. Carpenter MHB Technical Associates Administrative Judge 1723 Hamilton Avenue Atomic Safety and Licensing Suite K Board Panel San Jose, California 95125 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Stephen B. Latham, Esq.

Twomey, Latham & Shea Daniel F. Brown, Esq. 33 West Second Street Attorney P.O. Box 398 Atomic Safety and Licensing Riverhead, New York 11901 Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Ralph Shapiro, Esq.

Cammer and Shapiro, P.C.

9 East 40th Street Bernard M. Bordenick, Esq. New York, New York 10016 David A. Repka, Esq.

U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Matthew J. Kelly, Esq.

State of New York James Dougherty Department of Public Service 3045 Porter Street Three Empire State Plaza Washington, D.C. 20008 Albany, New York 12223 s 5

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