05000281/LER-1981-010-03, /03L-0:on 810209,svc Water pump,2-SW-P-10B, Developed Low Discharge Pressure.Caused by Eel Lodged in Impeller.Eel Removed & Pump Returned to Svc

/03L-0:on 810209,svc Water pump,2-SW-P-10B, Developed Low Discharge Pressure.Caused by Eel Lodged in Impeller.Eel Removed & Pump Returned to Svc

ML18139B141
Person / Time
Site:	Surry
Issue date:	03/06/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B140	List: 05000281/LER-1981-010, Forwards LER 81-010/03L-0 05000281/LER-1981-010-03, /03L-0:on 810209,svc Water pump,2-SW-P-10B, Developed Low Discharge Pressure.Caused by Eel Lodged in Impeller.Eel Removed & Pump Returned to Svc
References
LER-81-010-03L-01, LER-81-10-3L-1, NUDOCS 8103100639
Download: ML18139B141 (2)

LER-1981-010, /03L-0:on 810209,svc Water pump,2-SW-P-10B, Developed Low Discharge Pressure.Caused by Eel Lodged in Impeller.Eel Removed & Pump Returned to Svc

Event date:
Report date:
2811981010R03 - NRC Website

text

NRC FORM 366

'1-n, U.S. NUCLEAR REGULATORY COMMISSION

. LICENSEE EVENT REPORT CONTROL BLOCK: !-I _.._

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!PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION!

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• 61 COCKET NUMBER 68 69 EVENT CATE 4

REPORT CA, c:

eVENT DESCRIPTION ANO PROBABLE CONSEQUENCES@

I With the Unit at 100 percent Reactor Power, service water pump, 2-SW-P-JQB, mI] I developed a low* discharge pressure *.. The Redundant. Pump. started and returned system 1-(ITI] I pressure to normal.

The health and safety of the public were, not affected.

((II)

This event is contrary to T.S. 3.3.A.8.b. and is* reportable per T.S.6.6.2.b.(2).

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8 SYSTEM

CAUSE

CAUSE COMP.

COOE CODE SUBCOOE COMPONENT coos suacooe I W! Al@ w@ L~@ I Pl uj M! Pl xj XI@ ~@

9 10 11 12 13 18 19 SEQUENTIAi.

OCCURRENCE REPORT VALVE SUBCOOE L~.l@

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LE_ A/RO. LVENT YEAR REPORT NO.

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NUMBER 21 22 23 24

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ATTACHMENT NPR~

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REVISION NO

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. CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS @

44 47 [II[]. !Upon disassembly of the pump an eel was found lodged in the impeller.

The eel was

!III] 1removed and the pump returned to service.

o:m CIJ:i]-1 i.. ------------------------------------------------------------------------------------------------------------------_.

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9 OTHER STATUS, (§)

80 FACILITY METHOOOF 01scoveRY CESCRIPTION STATUS

%POWER CISCOVERY iTIIJ L!.J@ 11 Io Io lI N/A I WI* Operator Observation.

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9 10 12 1'3

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• PERSONNEL EXPOSURES NUMBER @ TYPE @CESCRIPT10N 39 J o I o I o 1

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. -~~,,.J.F;,i,~~~ffJ~*.l~T~i;t~t~l:+/-f~::d:b:L;.;:~.~~:;.;;,~1 ATTACHMENT 1

SURRY POWER STATION, UNIT 2

---

DOCKET-NO-:--

50-281 REPORT NO:

81-010/3L-O EVENT DATE:

02;..09-81

• SUBJECT:

LOW DISCHARGE PRESSURE ON PUMP 2-SW-P-lQ~

---

h*---B£SeRI-PTI0N-:-o-f EVENT:

---

*------en---Feb-rtrary-9,1981, with Unit lfo. 2 at 100% power,---Charging.P.ump.-Sendce... _____ ---: _________.

Water Pump 2-SW-P-lOB developed a low discharge pressure.

The redundant

___.:_ _________ ---*-service water** pump started and returned system pre!:i,Sure to.--normal.~ -. - -*-----... -------- ---

This event is contrary to Technical Specification 3.3.A.8.b. and is

• *reportable.per Technical Specification 6.6.2.* b.(2).

2. --PROBABLE CONSEQUENCES and STATUS of REDUNDANT EQUIPMENT:

• The Charging* Pump Service Water Subsystem provides cooling for the charging pmnp lube oil and intermediate seal coolers.

The redundant pump, 2-SW-P;..lOA, was op~rable:'.and performed it's intended function.

Therefore, the health and safety of the public were not affected.

3.

CAUSE

The cause of the low discharge pressure was an eel lodged in the pump's impeller. ______ _

4.

IMMEDIATE CORRECTIVE ACTION

The redundant pump, 2-SW-P-lOA, was verified *operating and suppling the* required

---

p-ressur.e-------

. ------5.* ---- SUBSEQUENT.~ CORRECTIVE ACTION:

---S.~ice-Water.. Pump, 2-SW-P-lOB, was disassembled and the eel removed from the pump's impeller.

The pmnp was subsequently proven operable.

6 *. ACTIONS TAKEN TO PREVENTREOCCURRENCE:

-~ge is in progress, as a. result..o.f.....the-"pipe sttess~analysiSL~o~am,. _____ _

which will improve the filtration capabilities of -the system.

The design change will address both units.