ML20134K643

Requests Listed Addl Info Re Fatigue Effects of Diesel Generator Vibration on Instrumentation,Per . Response Requested within 45 Days of Ltr Date

ML20134K643
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	08/23/1985
From:	Youngblood B Office of Nuclear Reactor Regulation
To:	Farrar D COMMONWEALTH EDISON CO.
References
NUDOCS 8508300325
Download: ML20134K643 (3)

Text

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AUG 2 31985 Docket Nos.: STN 50-454, STN 50-455, STN 50-456 and STN 50-457 Mr. Dennis L. Farrar Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

Subject:

Request for Additional Information - Vibration of Diesel Generator Instrumentation, Byron /Braidwood We have reviewed your letter of October 16, 1984 regarding the fatigue effects, due to vibrations, on instrumentation on the Byron /Braidwood diesel control panels. The following additional information is required so that we can complete our review:

1.

Provide the acceleration response plots recorded at the seven locations on the control panel, and clarify whether these plots represent accelerations at the locations or device location response spectra.

2.

Explain how 0.31g, the maximum value of the operational acceleration, is derived. Also, justify the conclusion that the seismic test had enough margin for operational vibration, which is made solely by com-paring the above acceleration value with the Zero Period Acceleration (ZPA) of Test Response Spectra (TRS), o.8g.

It is noted that in comparing the severity of two motions, their respective frequency contents should be considered, instead of only the ZPA value or the acceleration at a particular frequency point.

3.

Demonstrate that the Byron /Braidwood diesel generator control panel devices and instruments are similar to the LaSalle diesel generator l

tested control panel devices and instruments by providing similarity data for the following parameters: manufacturers, model numbers, materials, sizes, dimensions, and dynamic characteristics, etc. We need this information to conclude similarity of the corresponding devices and instruments.

For devices which are unique to Byron /Braidwood, justify that they can be covered by the LaSalle evaluation.

8508300325 850823 DR ADOCK O 4

Mr. Dennis L. Farrar Commonwealth Edison Company Byron /Braidwood AUG23 565 cc:

Mr. William Kortier Dr. Bruce von Zellen Atomic Power Distribution Department of Biological Sciences Westinghouse Electric Corporation Northern Illinois University Post Office Box 355 DeKalb, Illinois 61107 Pittsburgh, Pennsylvania 15230 Joseph Gallo, Esq.

U. S. Nuclear Regulatory Commission Isham, Lincoln & Beale Byron / Resident Inspectors Office 1120 Connecticut Ave., N. W.

4448 German Church Road Suite 840 Byron, Illinois 61010 Washington, D. C. 20036 Ms. Diane Chavez C. Allen Bock, Esquire 528 Gregory Street Post Office Box 342 Rockford, Illinois 61108 Urbana, Illinois 61801 Mrs. Phillip B. Johnson Thomas J. Gordon, Esquire 1907 Stratford Lane Waaler, Evans & Gordon Rockford, Illinois 61107 2503 S. Neil Champaign, Illinois 61820 Douglass Cassel, Esq.

109 N. Dearborn Street Ms. Bridget Little Rorem Suite 1300 Appleseed Coordinator Chicago, Illinois 60602 117 North Linden Street Essex, Illinois 60935 Ms. Pat Morrison 5568 Thunderidge Drive Mr. Edward R. Crass Rockford, Illinois 61107 Nuclear Safeguards and Licensing Division David C. Thomas, Esq.

Sargent & Lundy Engineers 77 S. Wacker Drive I

55 East Monroe Street Chicago, Illinois 60601 Chicago, Illinois 60603 Rebecca J. Lauer, Esq.

U. S. Nuclear Regulatory Commission Isham, Lincoln & Beale l

Resident Inspectors Office Three First National Plaza l

RR#1, Box 79 Suite 5200 Braceville, Illinois 60407 Chicago, Illinois 60602 l

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4-Byron /Braidwood AUG 2 31985 cc:

Regional Administrator U. S. NRC, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Erie Jones, Director Illinois Emergency Services and Disaster Agency 110 East Adams Springfield, Illinois 62705 Ms. Lorraine Creek Rt. 1, Box 182 Manteno, Illinois 60950 Mr. Michael C. Parker, Chief Division of Engineering Illinois Department of Nuclear Safety 1035 Outer Park Drive Springfield, Illinois 62704 Michael Miller Isham, Lincoln & Beale One First National Plaza 42nd Floor Chicago, Illinois 60603 Jane M. Whicher, Esq.

109 N. Dearborn Street Chicago, Illinois 60602

Mr. Dennis L. Farrar AUG 2 31985 4.

Provide a detailed calculation of the fatigue damage potential of both LaSalle EDG program and actual operational vibration of Byron /

Braidwood diesel generator control panel, which supports your con-clusion that the fatigue damage potential associated with the test program is at least 6.38 times greater than that associated with the vibration due to the Byron /Braidwood engine operation.

Please provide a response within 45 days of the date of this letter. Review of this item must be completed to satisfy License Condition 2.C(10) of the Byron Station, Unit 1, operating license.

If additional clarification is needed, please contact the Byron Project Manager, L. Olshan at (301) 492-7070.

Sincerely, ORIGINAL SIGIr!D BY:

B. J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing cc: See next page DISTRIBUTJ0Mt w ket File ) L01shan Dec NRCPDR OELD LPDR ACRS (16)

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