LER-1981-004, Forwards LER 81-004/03L-0 |
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| 1331981004R00 - NRC Website |
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October 13, 1981 US w
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Mr.
R.
H.
Engelken, Director i5, 3
Office of Inspection and Enforcement py Region V r
E U.
S.
Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 m
Walnut Creek, CA 94596
'A Re:
Docket No. 50-133 License No. DPR-7
Dear Mr. Engelken:
Pursuant to Section IX.I.2.b.(2) of Appendix A of the Technical Specifications to the Humboldt Bay Unit 'lo.
3 Operating License, we are submitting the enclosed Licensee r vent Report LER 81-004-03L-0 covering the failure of #3 screen wash pump's second stage impeller.
There were no adverse eff2 cts.
Very truly yours,
'I
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Y
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Enclosiare
(([ff cc(w/ enc.):
Director Office of Management Information and Program Control I
u ar egulatory Commission 8110220458 811013>
PDR ADOCK 05000133 Washington, D. C.
20555 S
PDR
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| | | Reporting criterion |
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| 05000133/LER-1981-001-03, /03L-0:on 810512,stem of Screen Wash Pump 2 Discharge Valve to Screen Wash Header Separated from Valve Seat.Caused by Valve End of Life.Valve to Be Replaced | /03L-0:on 810512,stem of Screen Wash Pump 2 Discharge Valve to Screen Wash Header Separated from Valve Seat.Caused by Valve End of Life.Valve to Be Replaced | | | 05000133/LER-1981-001, Forwards LER 81-001/03L-0 | Forwards LER 81-001/03L-0 | | | 05000133/LER-1981-002-03, /03L-0:on 810619,stem of Wash Pump Discharge Valve Separated from Valve Seat.Caused by Corrosion of Valve Seat Yolk.Valve Will Be Replaced Prior to Returning Unit to Power Operation | /03L-0:on 810619,stem of Wash Pump Discharge Valve Separated from Valve Seat.Caused by Corrosion of Valve Seat Yolk.Valve Will Be Replaced Prior to Returning Unit to Power Operation | | | 05000133/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | | | 05000133/LER-1981-003-03, /03L-0:on 810629,during Nonroutine Insp of Liquid Waste Sys,Vent Monitor Alarm Setpoint Background Reading Found High.Caused by Personnel Error.Setpoint Restored & Personnel Reinstructed | /03L-0:on 810629,during Nonroutine Insp of Liquid Waste Sys,Vent Monitor Alarm Setpoint Background Reading Found High.Caused by Personnel Error.Setpoint Restored & Personnel Reinstructed | | | 05000133/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | | | 05000133/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | | | 05000133/LER-1981-004-03, /03L-0:on 810914,during Shutdown,Screen Wash Pump 3 Showed Decreased Discharge Pressure.Caused by Second Stage Impeller Separating from Shaft Due to Impeller Locking Nut Off & Allowing Impeller to Spin Free of Shaft | /03L-0:on 810914,during Shutdown,Screen Wash Pump 3 Showed Decreased Discharge Pressure.Caused by Second Stage Impeller Separating from Shaft Due to Impeller Locking Nut Off & Allowing Impeller to Spin Free of Shaft | | | 05000133/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | | | 05000133/LER-1981-005-03, /03L-0:on 811001,w/unit Shutdown & Screen Wash Pump 3 Being Returned to Svc After Repairs,Discharge Casing Cracked.Possibly Caused by Fatigue Failure.Casing Replaced from Screen Wash Pump 4 | /03L-0:on 811001,w/unit Shutdown & Screen Wash Pump 3 Being Returned to Svc After Repairs,Discharge Casing Cracked.Possibly Caused by Fatigue Failure.Casing Replaced from Screen Wash Pump 4 | |
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