View source for ELV-03632, Special Rept 2-92-2:on 920317,dust & Debris Observed Settling in Vicinity of Generator End of Diesel.Caused by Large Piece of Fireproofing Insulation Falling Into Lead Termination Box.Power Termination Box Repaired

{{Adams
| number = ML20094S530
| issue date = 04/09/1992
| title = Special Rept 2-92-2:on 920317,dust & Debris Observed Settling in Vicinity of Generator End of Diesel.Caused by Large Piece of Fireproofing Insulation Falling Into Lead Termination Box.Power Termination Box Repaired
| author name = Mccoy C
| author affiliation = GEORGIA POWER CO.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000425
| license number = 
| contact person = 
| document report number = 2-92-2, ELV-03632, ELV-3632, NUDOCS 9204150145
| document type = REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER), TEXT-SAFETY REPORT
| page count = 2
}}

=Text=
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April 9, 1992 ELV-03632 001476 Docket No.           50-425 U.-S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555 Gentlemen:
V0GTLE ELECTRIC GENERATING PLANT SPECIAL REPORT INVALID DIESEL GENERATOR FAILURE In accordance with the requirements of the Vogtle Electric Generating Plant Technical Specifications, sections 4.8.1.1.3 and 6.8.2, Georgia Power Company hereby submits the enclosed Special Report concerning an invalid diesel generator failure.
Sincerely, l                                                              0 C. K. McCoy CKM/NJS/gmb

==Enclosure:==
Special Report 2-92-2 xc: -Georoia Power Company Mr. W. B. Shipman Mr. M. Sheibani NORMS U. S. Nuclear Reaulatory Commission Mr. S. D. Ebneter, Regional Administrator Mr. D.'S. Hood, l.icensing Project Manager, NRR Mr. B. R. Bonser, Senior Resident Inspector, Vogtle
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9204150145 920409 PDR       ADOCK 05000425
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V0GTLE ELECTRIC GENERATING PLANT - UNIT 2 1ECHNICAL SPECIFICATION SPECIAL REPORT 2 92-2 INVAllD DIESEL GENERATOR FAILURE A. REQUIREMENT FOR REPORT This rrport is required in accordance with the Vo0tle Electric Generating Plant Technical Specifications (TS), section 4.8.1.1.3, which requires all diesel generator (DG) failures, valid or nonvalid, be reported to the Commission in a Special Report pursuant to TS 6.8.2.
B. DESCRIPTION OF INVAllD TAILURE OF DIESEL GENERATOR 2B On March 17, 1992 at 0020 EST, DG 2B was being unloaded after successfully completing a 60-minute, full-load run for a monthly surveillance test. At 0021 EST, a plant equipment operator (PE0)- heard a loud noise and upon turning around, observed dust and debris settling in the vicinity of the generator end of the diesel. The PE0 immediately reported this cus:rence l                                            to the control room, and the DG was manually tripped. It was then l                                            determined that a large piece of fireproofing insulation had fallen from the L                                                               G room,- striking the generator end of the diesel and the L
                                            -ceiling generatorof power the D, lead termination box. - As a conservative measure, DG 2B was placed in local control at 0033 EST to allow for damage assessment. This resulted in DG 28 being' unavailable for emergency operation. Since DG 2A was already . inoperable, the action requirement     f TS 3.8.1.2 were entered for not having at least one DG operable in Moop ..
Inspection of the diesel found that the top of the power lead termination box was dented, and the latch assembly for the door of the box was damaged.
However, no damage was found to have occurred to the high voltage leads or to components internal to the box. After cleaning up the debris from the falling fireproofing material and completing the inspection of the DG, DG 2B was successfully started at 0411 EST to verify operability. ihe operability test run was successfully completed, and DG 2B was declared operable at 0700 EST. The elapsed time that DG 2B was unavailable for emergency operation
;                                            was 3 hours and 34 minutes.
C.    

==SUMMARY==

This event is classified as an invalid failure per Regulatory Guide 1.108, section C.2.e. For DG 2B, there has been 1 valid failure in the last-20 valid tests and 3 valid failures in 76 valid tests. After this event, the test frequency for DG 2B was established at once per 31 days in accordance with the requirements of TS table 4.8-1.
An engineering evaluation was completed on March 17, 1992, to determine the need to replace the fireproofing material which had fallen from the ceiling of the DG room. The fireproofing material had become detached from an 8-foot 6-inch by 6-foot (approximate) steel plate assembly used to provide a plenum or diffuser to direct HVAC air flow. It was determin2d that the fire- proofing material was not required, and it will not be replaced.
L                                            Additionally, corrective action to repair the power lead termination box has l                                            been completed.
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