ML20100R031

Intervenor Exhibit I-44,consisting of Accepting Torsional Critical Speed Arrangements for Use on Diesel Generator Sets on ocean-going Vessels Submitted in

ML20100R031
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	10/01/1984
From:	Giuffra R, Hannan W AMERICAN BUREAU OF SHIPPING
To:	Yang T TRANSAMERICA DELAVAL, INC.
References
OL-I-044, OL-I-44, NUDOCS 8412170291
Download: ML20100R031 (2)

Text

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-- /-Qfr/p N 1i RTWrcl L 3 May 1984 ~0 E T8-3 Transamerica Delaval DSR-48 Diesel-Engine / Generator-

_ for Long Island Lighting Company Shoreham Plant Report on Crankshaft Torsional Stresses.-

Transamerica Delaval Inc.

Engine & Compressor Division 550 85th Avenue P. O. Box 2161 Oakland. CA 94621 Attention: Mr.-Roland T. M. Yang Manager Applied Mechanics.

Gentlemen:

We have your letter of 3 April 1984 submitting copies of the above subject report for our review, and with regard thereto have to advise as follows:

i We note from the' submitted report that the torsional vibration stress in the crank-j shaft for the first mode Sh order critical speed (422 RPM) was expected to approach 4 or exceed that permitted by the Rules for the submitted crankshaft material.

We further note from the submitted report that tests were conducted to determine the actual stresses in the crankshaft, and that these tests indicated a substantial mar-i gin of safety against fatigue failure due to corsional vibration.

a Based on the submitted test data, and ora submitted service experience with similar

engines having similar torsional critical speed arrangements, we advise that we would have no objection to the submitted torsional critical speed arrangement for use on diesel generator sets on an ocean going vessel, insofar as our classification require-4 cents for marine service are concerned.

Three (3) copyles of the subject report, stamped to indicate our review, are being re--

turned.

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Very truly yours, g, g, y, A, g, p, y, g, t,

5. O. -R.T.Y. C. R. C.

ALICAN BUREAU OF SHIPPING " IC EIV E D W. M. HANNAN TICXLa kAY 071984 uPe m i

Vice President

. ENGINEERING

' Mr C:RC. FORWARD COPY cc: LILCO. (E. Montgomery) by:c p h yru --"TU FIG SEE ME

' Accounting Dept. w/ enclosure Robert A. Giuffre)

! Legal Dept. (M. Adams) Principal Surveyor - Machinery i Subject File 460 p.

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