05000416/LER-1983-156, Updated LER 83-156/03X-1:on 831003,capscrew Securing Starting Air Manifold to Support Plate on Left Bank Cylinder 8 Found Broken Inside Plate.Cause Undetermined.Capscrew replaced.W/840302 Ltr

Updated LER 83-156/03X-1:on 831003,capscrew Securing Starting Air Manifold to Support Plate on Left Bank Cylinder 8 Found Broken Inside Plate.Cause Undetermined.Capscrew replaced.W/840302 Ltr

ML20087D056
Person / Time
Site:	Grand Gulf
Issue date:	03/02/1984
From:	Byrd R, Dale L MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-84-0136, AECM-84-136, LER-83-156-03X, LER-83-156-3X, NUDOCS 8403130274
Download: ML20087D056 (3)

LER-2083-156, Updated LER 83-156/03X-1:on 831003,capscrew Securing Starting Air Manifold to Support Plate on Left Bank Cylinder 8 Found Broken Inside Plate.Cause Undetermined.Capscrew replaced.W/840302 Ltr

Event date:
Report date:
4162083156R00 - NRC Website

text

83 UpdateReport-PreviousRep{r Dgli Attachment to AECM-84/0136

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EVENT DESCRIPTION AND PRDSABLE CONSEQUENCES h

@ lDuring a routine insoection of the Div. I D/G. a caoscrew securino the I

[oja_J lstarting air marhi f old to its support plate on the No. 8 lef t bank cylin-j o 141 l der was f ound broken inside the plate. A similar capscrew on the No. 7 l a w lLB cylinder was found not securely tightened. An LCO was entered (Div. Il ,

@ ID/G deelared inoperabla) pursuant to T.S.3.8.1.1.a since it was l

[T[Il l questionable whether the seismic component (support plate) was capable  !

[olsilof perferming its designed function. Div. 2 & 3 D/Gs were operable. l

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33 34 3 3 37 43 41 42 43 _ 44 47 CAUSE DESCR.RTIOes Aas0 CORRECTIVE ACTIONS h g o](The rent cause of the failed capscrew could not be determined due to thel g ] lcapscrew being removed and eliminated before an accurate analysis could l

, 7 lbe performed. The failed capscrew was replaced 'ith one of the same type l g land grade. The other capscrew was tightened _ its required torque. Thel D/G was ut f service f r 6.5 h urs. This is a final report.

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NAME OF PRtPARER PHONE: j

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N MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mizsissippi P. O. B O X 164E 0. yg S O N. MIS SISSIP Pl 3 9 205

] March ?, 1984 NUCLE AR PRODUCTION DEPARTMENT U. S. Nuclear Regulatory Commission Region II 101 Marietta St. , N.W. , Suite 2900 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Regional Administrator

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-13 File 0260/L-835.0 Update Report - Capscrew Securing Division 1 Diesel Generator Starting Air Manifold to its Support Plate Found Broken LER 83-156/03 X-1 AECM-84/0136 This letter submits an update to a previous report submitted on November 2, 1983. The event for which the report was submitted occurred on October 3, 1983, during a routine inspection of the Division 1 Diesel Gcnerator, when a capscrew securing the starting air manifold to its support plate on the Number 8 lef t bank cylinder was found broken inside the plate. A similar capscrew on the Number 7 left bank cylinder was found not securely tightened. A Limiting Condition for Operaticn was entered pursuant to Technical Specification 3.8.1.1.a. This was reported pursuant to Technical Specification 6.9.1.13.b.

Our investigation into the cause of de event is complete. Attached is LER 83-1.,6/03 X-1 which is a final report.

Yout truly, L. F. Dale

!!anager of Nuclear Services EBS/SHH: sad Attachment cc: (See Next Page) dFFICIAL Copy e-~

Member Middle Sout.h Utilities System I,I i

. AECM-84/0136 MISSIOCIPPI POWER Q LIGHT COMPANY #E" cc: Mr. J. B. Richard (w/a)

Mr. R. B. McGehee (w/o)

Mr. T. B. Conner (w/o)

Mr. G. B. Taylor (w/o)

Mr. Richard C. DeYoung, Director (w/a)

Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Document Control Desk (w/a)

U. S. Nuclear Regulatory Commission Washington, D. C. 20555

,