ML20082G299
| ML20082G299 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 11/23/1983 |
| From: | Pollock M LONG ISLAND LIGHTING CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| SNRC-986, NUDOCS 8311300148 | |
| Download: ML20082G299 (3) | |
Text
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LONG ISLAND LIGHTING COMPANY
= --~ M 175 EAST OLD COUNTRY ROAD
- NUCLEAR November 23, 1983 SNRC-985 Mr. Harold R.
Denton Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Construction Permit No. CPPR-95 Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322
Dear Mr. Denton:
Pursuant to 10 CFR 50.55(b), Long Island Lighting Company requests that the Nuclear Regulatory Commission extend the date for completion of the Shoreham Nuclear Power Station, Unit 1, from December 31, 1983, to December 31, 1984.
The schedule extension is necessary because repairs and testing of' the emergency diesel generators at Shoreham will not be completed before December 31, 1983.
Absent the failure described below, LILCO believes that Shoreham would have been physically ready to load fuel prior to December 31, 1983.
On August 12, 1983, LILCO was conducting testing following replace-ment of cylinder heads on Diesel Generator 102.
As the test neared completion, the diesel generator experienced excessive vibration and erratic load swings.
The diesel was immediately shut down and allowed to cool overnight.
Inspections on August 13 revealed that the crankshaft on Diesel Generator 102 was completely severed in the vicinity of the number seven cylinder.
Subsequent investigation of the other two diesel engines found cracks in the crankshafts of both engines.
LILCO commenced a comprehensive effort to determine the cause of the failure and to repair all three diesels.
LILCO and its consultants have now determined that the crankshaft failed due to high cycle fatigue from torsionel vibration in excess of the fatigue limit of the crankshaft material.
The design of the crankshaft was not adequate to withstand the cyclic torsional stresses experienced during operation of the diesel.
The design inadequacy is attributable to an error in the torsional stress analysis 8311300148 831123 PDR ADOCK 050003ggMM u) cked.
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(N : N, November 23, 1983 SNRC-986
.Page 2 performed by the manufacturer as part of the original design process..The original crankshafts have now been replaced by crankshafts of a stronger design which have been shown to be capable of withstanding the anticipated torsional stresses during operation.
During disassembly of the diesel generators to replace tbc crankshafts, LILCO conductedJa complete inspection of the engines.
This inspection revealed problems with other componsnts of the diesels, including cracked connecting rod bearings and pistons.
LILCO is investigating'each of these problems and is taking steps to remedy them..In addition, LILCO has decided to conduct a design and quality review of.the Delaval diesel generators at Shoreham.
The schddule for repair and testing of the three Delaval diesels anticipates completion of all' pre-operational tests in February 1984.
LILCO's current schedule for Fuel Load is the second quarter of 1984.
However, in order to provide a suitable margin for the completion of this work, including any possible rework which may result from the diesel generator design review, and for contingencies associated with ASLB. litigation, LILCO requests that the Construction Permit completion date be extended from December 31, 1983, to December 31, 1984.
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In accordance wi'ch 10 CFR 170.12(c), a check for one tlousand two hundred (1,200.00) doll'ars is enclosed as the fee for this administrative Class II amendment.
Should you have any questions, please' contact this office.
Very truly yours, l awtY
$/l Millard S. Pollock MSP:ck l
Enclosure cc:
C. Petrone All parties listed -in attachment 1
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4 ATTACl! MENT 1 I
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Lawrence Brenner, Esq.
lierbert 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 Christopher & Phillips Commission 8th Floor Washington, D.C.
20555 1900 M. Street, N.W.
Washington, D.C.
20036 Dr. Peter A. Morris Administrative Judge Mr. Marc W. Goldsmith Atomic Safety and Licensing Energy Research Group Board Panel 4001 Totten Pond Road U.S. Nuclear Regulatory Waltham, Massachusetts 02154 Commission Washington, D.C.
20555 MilB Technical Associates 1723 Ilamilton Avenue Dr. George A. Fercuson Suite K School of Engineering San Jose, California 95125 Howard University 2300 6th Street, N.W.
Washington, D.C.
20059 Stephen B.
Latham, Esq.
Twomey, Latham & Shea 33 West Second Street B"ornard M.
Bordenick, Esq.
P.O.
Box 398 David A.
Repka, Esq.
Riverhead, New York 11901 U.S..
Nuclear Regulatory Commission Washington, D.C.
20555 Ralph Shapiro, Esq.
Cammer and Shapiro, P.C.
9 East 40th Street Mr. James Dougherty New York, New York 10016 3045 Porter Street Washington, D.C.
20008 Matthew J. Kelly, Esq.
State of New York Department of Public Service Three Empire State Plaza Albany, New York 12223 s
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