05000348/LER-1980-071-03, /03L-0:on 801027 & 28,containment Atmosphere Particuulate & Gaseous Radioactivity Monitoring Sys (R11 & R12) Declared Inoperable Due to Low Flow Pump Trips.Caused by Failing Bearings & Partially Opened Isolation Valve

/03L-0:on 801027 & 28,containment Atmosphere Particuulate & Gaseous Radioactivity Monitoring Sys (R11 & R12) Declared Inoperable Due to Low Flow Pump Trips.Caused by Failing Bearings & Partially Opened Isolation Valve

ML19345B833
Person / Time
Site:	Farley
Issue date:	11/26/1980
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345B806	List: 05000348/LER-1980-066-03, /03L-0:on 801026,containment Atmosphere Particulate & Gaseous Radioactivity Monitoring Sys (R11 & R12) Declared Inoperable.Caused by Clogged Filter Paper from Stuck Filter Paper Takeup Reel Causing Pump Low Flow Trips 05000348/LER-1980-068-03, /03L-0:on 801031,B Train River Water Pumps Declared Inoperable Due to Inadequate Lube & Cooling Water Flow.Caused by Dirty Strainers.Strainers Blown Down & Cleaned 05000348/LER-1980-069-01, /01T-0:on 801112,water for Lubrication & Cooling of a Train Svc Water Pumps Found to Be Provided by B Train Water Header & Vice Versa.Caused by Design Error.Design Change to Provide Correct Separation Completed 05000348/LER-1980-070-03, /03L-0:on 801028,svc Water Bldg Train a Battery Sys Declared Inoperable Due to Low Cell Specific Gravity. Caused by Close Terminal Proximity & Poor Post Seal Design Allowing Formation of Acid Residue Which Shunted Current 05000348/LER-1980-071-03, /03L-0:on 801027 & 28,containment Atmosphere Particuulate & Gaseous Radioactivity Monitoring Sys (R11 & R12) Declared Inoperable Due to Low Flow Pump Trips.Caused by Failing Bearings & Partially Opened Isolation Valve 05000348/LER-1980-072-03, /03L-0:on 801031,river Water Train B Declared Inoperable When Pump 5 Tripped & Would Not Restart.Caused by Breaker Hea 86 Lockout Relay & 50G Instantaneous Overcurrent Relay Actuation ML19345B805
References
LER-80-071-03L, LER-80-71-3L, NUDOCS 8012020595
Download: ML19345B833 (2)

LER-1980-071, /03L-0:on 801027 & 28,containment Atmosphere Particuulate & Gaseous Radioactivity Monitoring Sys (R11 & R12) Declared Inoperable Due to Low Flow Pump Trips.Caused by Failing Bearings & Partially Opened Isolation Valve

Event date:
Report date:
3481980071R03 - NRC Website

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Io i3i l' zaseous radioactivity monitoring systems (R11 and' R12, respectively) were declared f*5TT] I inoperable due to low flow pump trips.. Tech. Soec.' 3.4.6.1, in part, re

'res R11 Jais! l and R12 to be operable. Tech. Spec. 3.4.6.1 action statement requirements were met.

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3J 34 35 36 37 40 44 42 43 CAUSE DESCAl??!CN ANDCCaaECTIVE ACTIONS h 124oII The low flow trip in the first occurrence was due to failing bearings on the inboard i 6il l pump which caused oscillations in pump performance. The inboard pump was tagged out I for maintenance, the outboard pump was valved in and approximately 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> later gl the second incident occurred.

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l LER 80-071/03L-0 Cause Description and Corrective Actions (Cont'd) subsequent pump trip. The valve was fully opened and the system was returned to service at 2343 on 10/28/80.

Personnel responsible for the error have been instructed as to the necessity of insuring proper position of the isolation veilves. Other personnel with these responsibilities will be instructed on this matter.

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