05000280/LER-1980-009-03, /03L-0:on 800123,during Normal Operation,Boric Acid Transfer Pump 1-CH-P-2A Lost Flow.Caused by Broken Pump Shaft Inside Pump Casing.Caused by Improper Installation.Pump a Replaced & Maint Procedures Revised

/03L-0:on 800123,during Normal Operation,Boric Acid Transfer Pump 1-CH-P-2A Lost Flow.Caused by Broken Pump Shaft Inside Pump Casing.Caused by Improper Installation.Pump a Replaced & Maint Procedures Revised

ML18138A042
Person / Time
Site:	Surry
Issue date:	02/18/1980
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18138A041	List: 05000280/LER-1980-009-03, /03L-0:on 800123,during Normal Operation,Boric Acid Transfer Pump 1-CH-P-2A Lost Flow.Caused by Broken Pump Shaft Inside Pump Casing.Caused by Improper Installation.Pump a Replaced & Maint Procedures Revised
References
LER-80-009-03L-01, LER-80-9-3L-1, NUDOCS 8002220373
Download: ML18138A042 (2)

LER-1980-009, /03L-0:on 800123,during Normal Operation,Boric Acid Transfer Pump 1-CH-P-2A Lost Flow.Caused by Broken Pump Shaft Inside Pump Casing.Caused by Improper Installation.Pump a Replaced & Maint Procedures Revised

Event date:
Report date:
2801980009R03 - NRC Website

text

LICENSEE EVENT REPORT

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!During normal operation, flow was lost from Boric Ac:id Transfer [o j 2 j Pum_g l-CH-P-2A.

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43 44 1, I o I l Upon disassembly of l-CH-P-2A, it was discovered that the pump shaft had broken inside j 1 j, I I the pump casing.

Improper installation during previous maintenance on the pump. i's. the j, I 2 I.I suspected cause.. A new shaft was installed in the "A" pump.

The maintenance proce.,dures for the pumps have been updated to provide proper

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ATTACHMENT 1 (PAGE 1 OF 1)

SURRY POWER STATION, UNIT 1 DOCKET.NO:

50-280

. 'REPORT. NO:.80-009 /03L-0 EVENT DATE: 01-23-80 TITLE OF REPORT:

Failure of Boric Acid Transfer Pump l-CH-P-2A

1.

DESCRIPTION OF EVENT

2.

During normal operation, with the Unit at 100% power, Control Room indication revealed loss of flow £rom Boric Acid Transfer Pump l-CH-P-2A which was.in service at the time.

Unit ramp down was commenced until the "B" pump was placed*

in service.

This event is reportable in accordance with T.S. 6.6.2.b.2.

PROBABLE CONSEQUENCES.AND STATUS OF REDUNDANT.SYSTEMS:

Since the appropriate T.S *. action was implemented and since the redundant pump was operable, the health and safety of the public were not affected.

3.

CAUSE

The suspected cause of the event was improper installation of the_ pump shaft sleeve and impeller during previous maintenance work on the pump. -This caused the shaft to fail in service~

4.

IMMEDIATE CORRECTIVE ACTION

5.

The redU:?.d..ant pump was placed in service.

A new shaft was installed in the A pump.

SUBSEQUENT CORRECTIVE ACTION:

None r,:quired.

6.

ACTION TAKEN TO PREVENT RECURRENCE:

7.

The maintenance procedures for the pumps have been updated to provid~ proper dimensional verifications during manufacture of repl.s.cement parts and assembly**

of the pumps.

GENERIC ~!CATIONS:

None.