ML19305D191

Supplemental Part 21 Rept Re Failed Engine Thrust Bearing. Insp of Crankshaft Thrust Bearings Installed on Two PC-2.5 Generator Sets Indicate Plugs Properly Installed & Free of Reported Potential Defect.Load During Shop Tests Too Light

ML19305D191
Person / Time
Site:	Callaway
Issue date:	03/05/1980
From:	Moriarty J COLT INDUSTRIES, INC.
To:
References
REF-PT21-80-191-001 NUDOCS 8004140156
Download: ML19305D191 (3)

Text

ATTACHED IS A PART 21 REPORT FROM IE f%IL UNIT - ROOM 359E/W

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PART 21 IDBRIFICATION to.

To -MI -e /

COMPANY NAIE @ AhE DATE OF LETTER

%-/f o D00ET t0. 6'c;-Yr3 DATE DISTRIBRED 3/'o / F o ORIGINAL REPORT SUPPLBENTARY A DISTRIBRION:

REACTOR (R)[

FUEL CYCE &

SAFEGUARDS (S)

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~

MATERIALS @

NRR/DDR, DIRECTOR AD/FFtEI-AD/SG-IE flRR/DR4 DIRECTOR NES/FCMS AD/RDI AD/ROI ( 2 )

REGIONS REGIMS AD/RCI IEFILES NRR/ DOR, DIRECT 0'R PEGIONS PDR 41SS/SG SS-881 IE EILES,(2b"

LPDR PDR CBRP/.LFILES CBHPAL FILES-SS-396 LPDR CSURAL FIES (CHPHO CBlT{AL FILES (CHRON)

TEPA (016 PDR IE FILES (2)

^

lEPA CBRPAL FILES 016 TEPA L0EB/MPA fib 5715 CBRPAL FILES (CHRON)

LGEB/fPA f!G 5715 C8HPAL FILES - SS-396 ACTION:

L0EB/fPA NG 5715 PRELIMINARY EVUALATION OF THE ATTACHED REPORT INDICATES LEAD RESPO FOLLGf-UP AS SH0hN BELG1:

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U SC M-C TC B w

so FFF.SI 80041404

..... REV 2/26/80

CDitIlliUstrl0S Fairbanks Morse f

Engine Division g4 701 Lawton Avenue Beloit. Wisconsin 53511 X-, j C((- O o / 808/364-4411 ( March 5,1980 50-483 Office of Inspection & Enforcement U. S. Nucleai Regulatory Commission 799 Roosevelt Road Glen Ellyn, Ill. 60137 Attention: Mr. James G. Keppler, Director, Region III Subjec t: Colt Industries-Fairbanks Morse Engine Division Emergency Diesel Generators South Carolina Electric & Gas Co.-Summer Station January 14,1980 Part 21 Report-Failed Engine Thrust Bearing-Supplement No. 1 SNUPPS-Callaway No. 1 Gentlemen: We have completed our inspections of the crankshaft thrust bearings on the two PC-2.5 generator sets at Union Electric's, Callaway Unit One. The plugs were properly installed ~in both units. Both units are free of the reported potential defect. Our earlier report indicated we were evaluating the design to permit explanation of the apparent satisfactory operation of the South Carolina Electric & Cas Unit during shop tests in our factory prior to shipment followed by failure during start-up at the Sumer site. These units are equipped with large capacity external thrust bearings to permit satisfac-tory operation under high fore and aft forces resulting from a seismic event. The actual load imposed on these bearings during shop tests is very low and perhaps zero. We have concluded that the bearing was lightly loaded during shop tests, did not fail during such tests, but subsequently failed. We will be inspecting other shipped units prior to initial operation and will report the results of those inspections as they are made. A copy of this report is being forwarded to the utilities involved. Very truly yours, /? J. rty MANAGER UTILI ES JMM:jc MAR 7 1980 A dersson es me Coe houssree Opersheg <

1 U. S. Nuclear Regulatory Commission March 5,1980 - Page 2 e cc: South Carolina Electric & Gas Co. P. O. Box 764 Columbia, South Carolina 29218 Attention: Mr. Dan Nauman Manager, Quality Assurance & Security Bechtel Power Corp. P. O. Box 607 Gaithersburg, Md. 20760 Attention: SNUPPS Project Engineer i t m J P G a k I I O , -. --}}