ML20082D925
| ML20082D925 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 11/17/1983 |
| From: | Earley A HUNTON & WILLIAMS, LONG ISLAND LIGHTING CO. |
| To: | Brenner L Atomic Safety and Licensing Board Panel |
| References | |
| ISSUANCES-OL, NUDOCS 8311230139 | |
| Download: ML20082D925 (6) | |
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November 17, 1983 o.. s et o
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li ife Lawrence Brenner, Esq.
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Administrative Judge g
Atomic Safety and Licensing iil Board Panel li U.S. Nuclear Regulatory E
Commission Washington, D.C.
20555 5
Long Island Lighting Company Docket No. 50-322 (OL)
Dear Judge Brenner:
k Enclosed is LILCO's Diesel Generator Status Report j
dated November 17, 1983.
This Status Report, which LILCO committed to provide in its Response.to Suffolk County's Motion to Compel dated September 12, 1983, is the final of a series of periodic status reports on the progress of the diesel generator effort that have been provided to the Board and parties.
Sincerely yours, f$LLt Anthony F. Earley, Jr.
221/403 Enclosure cc:
Dr. ?eter A.- Morris Dr. George A. Ferguson All Parties B311230139 831117 PDR ADOCK 05000322 g
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'.T November 17, 1983 E
DIESEL GENERATOR STATUS REPORT E"
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I.
Diesel Generator 101 j
s Diesel generator 101 has been installed in its diesel g
generator room.
Reconnection of the auxiliary systems is now t
in progress.
Initial alignment of the engine is also j
r.
underway.
g In previous status reports, LILCO indicated that it f
was reconsidering whether it was necessary to replace the
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main bearings on all three diesel generators.
The enclosed analys's from FaAA indicates that such replacement is unnecessary.
II.
Diesel Generator 102 Reconnection of diesel generator 102 to its auxiliary systems is now essentially complete.
Hydrostatic tests and flushes of the auxiliary systems connected to the engine are now underway.
The generator for diesel generator 102 has been reinstalled and megger checks and hi-pot tests on the rotor and stator have been satisfactorily completed.
III.
Diesel Generator 103 Reconnection of diesel generator 103 to its auxiliary I
systems is now essentially complete.
Hydrostatic tests and flushes of the auxiliary systems are now underway.
The 1
l generator for diesel generator 103 has been reinstalled and
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megger checks and hi-pot tests on the rotor and stator have I
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been satisfaccorily completed.
LILCO's last status report noted that an indication was found.on one of the diesel generator pistons.
Investiga-tion of that indication disclosed th'at it was a fatigue crack.
i LILCO has now completed an inspection of all 24 pistons and
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l 1
that investigation revealed similar indications on 23 pistons.
These indications are generally located in the ligaments of I
bosses for the bolts which hold the piston crown to the piston skirt.
FaAA is conducting an investigation of the cracked pistons.
LILCO is currently installing pistons of a new, improved design on all three diesel generators and FaAA's investigation will include consideration of the cause of these cracks and the adequacy of these new pistons.
The investigation is expected to take no more than eight weeks.
An interim report or reports may be issued and in that event, copies will be furnished to the Board and the parties.
IV.
Schedule The schedule for operation and testing of the diesel generators currently calls for completion of preoperational testing for all three emergency diesel generators by the end of January 1984.
The integrated electrical test is anticipated 4
to be completed by mid-February.
This schedule may be subject to change pending final confirmation and approval of the testing program.
Thus, assuming successful completion of the preoperational test program, the diesel generators will be ready to support the operation of the plant late in the _ _ - _ _ - _ _ _ - _ - - _ _ _ _ _ _ _ _ _ _ _
l-I first quarter of 1984.
In order to support LILCO's current i
projected fuel load date of late first quarter or early second quarter of 1984, litigation' of diesel generator issues must begin promptly.
To that end, as previously reported, LILCO proposed a schedule to the County for litigation of diesel generator issues.
Suffolk County rejected this proposal and has not proposed any alternative cchedule.
LILCO understands that the County believes litigation of diesel generator issues i
is premature.
LILCO believes that the diesel generator issues (except fer pistons) are ripe for litigation and will therefore propose a schedule to the Board next week.
Given the issuance of FaAA's reports on the cause of the diesel generator crankshaft failure and the adequacy of the new crankshafts and given the completion of the reassembly of the diesel engines and cheir imminent testing, this will be l
the final status report.
l l
i,
' Failure ENGINEERING AND METALLURGICAL CONSULTANTS 2225 EAST BAYSHORE ROAD. PC. BOX $1470.
PALO ALTO,CAurORNIA 94303 4415185&o400 TELEX 704216 MEMORANDUM
/
TO:
M. H. Milligan, LILC0 9
4 FROM:
L. A. Swanger, FaAA 1
DATE: November 11, 1983 f
RE:
Suitability of Main Bearings in TOI Enterprise Emergency Diesel Generr. tors l
Summary 5
FaAA predicts that the main bearings currently installed in DG101, DG102, and DG103 will perfonn reliably over the life of the engines.
3 The relevant load in terms of Peak Oil Film Pressure has been computed and is only 56% of the peak pressure computed for the connecting rod b
bearings. The teasile strength of samples of the material meets current specification.
laf Applied Loads v
"":l The most highly stressed main bearings in the TDI Enterprise engines are
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at main bearing positions 3, 5, 7, and 9.
Imperial Clevite Inc. was
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asked to compute the Peak 011 Film Pressure for these locations.
Thei r 2
h calculation was that the Peak Oil Film Pressure is 16,605 pai. This is only 56% of the computed Peak Oil Film Pressure of 29,745 psi in the I
13 x 11 connecting rod bearings. This pressure is also within Clevite's 5
recommended load range.
k 5
PALO ALTO + LOS ANGELES
+ HOUSTON PHOENIX
+ OETAoti BOSTON e
e M. H. Milligan McVember 11, 1983 Page 2 Material - Properties
. Main bearin'gs from three lots of new (1983) main bearings, as well as old (1978) main bearings, were sampled for mechanical properties.
The average estimate tensile strength was 24,950 psi, with a rar.qe from
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22,650 psi to 27,000 psi.
All but one of the samples exceeded the 23,000 psi specification currently quoted to us by TDI.
The tensile elongations ranged from 0.12% to 1.15%, but the significance of these numbers is questionable since they were determined with 1/4 inch diameter specimens.
Prediction Based upon the adequate tensile strength of the samples tested, and on the ' low loads imposed by the main bearing application, FaAA predicts that the main bearings currently installed in the TDI Enterprise Emergency Diesel Generators will not fail by fatigue cracking during the life of the engines.
t Dr. Lee A. Swanger, P.E.
LAS:bl/M&T2/7396 cc:
R. L. McCarthy G. W. Rogers C. H. Wells V
- I y
Fadure Assomtes 2.)
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