05000346/LER-1979-102-03, /03L-0:on 791022,during Feedwater Sys Monthly Surveillance Test,No Oil Level Visible in Oil Sight Glass on Inboard Bearing of Auxiliary Feedpump Turbine 1-1.Caused by Loose Sight Glass.Glass Tightened & Oil Replaced

/03L-0:on 791022,during Feedwater Sys Monthly Surveillance Test,No Oil Level Visible in Oil Sight Glass on Inboard Bearing of Auxiliary Feedpump Turbine 1-1.Caused by Loose Sight Glass.Glass Tightened & Oil Replaced

ML19210D652
Person / Time
Site:	Davis Besse
Issue date:	11/20/1979
From:	Melstad K TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19210D639	List: 05000346/LER-1979-102, Forwards LER 79-102/03L-0 05000346/LER-1979-102-03, /03L-0:on 791022,during Feedwater Sys Monthly Surveillance Test,No Oil Level Visible in Oil Sight Glass on Inboard Bearing of Auxiliary Feedpump Turbine 1-1.Caused by Loose Sight Glass.Glass Tightened & Oil Replaced
References
LER-79-102-03L, LER-79-102-3L, NUDOCS 7911270428
Download: ML19210D652 (2)

LER-1979-102, /03L-0:on 791022,during Feedwater Sys Monthly Surveillance Test,No Oil Level Visible in Oil Sight Glass on Inboard Bearing of Auxiliary Feedpump Turbine 1-1.Caused by Loose Sight Glass.Glass Tightened & Oil Replaced

Event date:
Report date:
3461979102R03 - NRC Website

text

NRC FORM 366 (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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8 60 61 DOCKET NUMBEH 68 69 EVENT D ATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h

[_On October 22, 1979 at 0906 hours0.0105 days <br />0.252 hours <br />0.0015 weeks <br />3.44733e-4 months <br /> durine the perf ormance of ST 5071.01. "Anvilt,rv i

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l Feedwatar System Monthlv Test". it was obset;t - that there was no oil level visible in) o 3

lthe oil sight glass on the inboard bearinn of the Auxiliary Feed Pumn Turbine 1-1.

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s This placed the unit in the Action Statement of Technical Soecifica tion 3.7.1.2.

I l o l6 ] l There was no danner to the health and safety of the oublic or station cercon*1.

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1017l second train. Auxiliary Feed Pumo 1-2. was ooerable.

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]The loss of oil was due to a loose sieht glass. The glass had apparent 1v vibrated i

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l tightened and the oil replaced.

Surveillance Test ST 071.01 was completed at 2004 1

1 7 J l i l 3 l l hours on October 22, 1979, and Auxiliary Feed Pump 1-1 was declared operable.

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DVR 79-155 Kevin Melstad pgoyg NAME OF PnEPAnEn

e TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER ST.uION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-79-119 DATE OF EVENT: October 22, 1979 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Auxiliary Feed Pump 1-1 inoperable Conditions Prior to Occurrence:

The unit was in Mode 1, with Power (MWT) = 2400, and Load (Gross FME) = 790.

Description of Occurrence: At 0906 heres on October 22, 1979 while performing Surveil-lance Test ST 5071.01, " Auxiliary Feedwater System Monthly Test", it was found that the number one Auxiliary Feed Pump Turbine inbaard bearing had no visible oil level in the oil sight glass.

This placed the unit in the Action Statement of Technical Specification 3.7.1.2 which requires that with one pump inoperable, the isoperable pump be repaired within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> The Technical Specification requires operability of both Auxiliary Feed Pumps while 'n Modes 1, 2, and 3.

Designation of Apparent Cause of Occurrence: The casse of the occurrence was due to the oil level sight glass becoming loose due to vibracion of the Auxiliary Feed Pump Turbine. Oil drained from the loose fitting.

Analysis of Occurrence: There was no danger to the health and safety of the public or to station personnel.

Auxiliary Feed Pump 1-2 was operable during this time.

Corrective Action

Under Maintenance Work Order 79-3321, the bearing sight glass was tightened. The sight glass was found to be loose and not seating properly. The oil icvel has remained constant since tightening. Oil sight glasses will be installed using a sealing compound. Surveillance Test ST 5071.01 was completed at 2004 hours0.0232 days <br />0.557 hours <br />0.00331 weeks <br />7.62522e-4 months <br /> on October 22, 1979, and Auxiliary Feed Pump 1-1 was declared operable. The unit was removed from the Action Statement.

Failure Data: A similar occurrence with containment spray pump oil sight glass was reported in Licensee Event Report NP-33-79-83.

LER #79-102 i798

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