05000366/LER-1980-050-03, /03L-0:on 800407,during ISI Pump Operability Testing,While Shut Down for Surveillance/Vent Header Installation Outage,Determined That Standby Liquid Control Pump B Did Not Meet Acceptance Criteria

/03L-0:on 800407,during ISI Pump Operability Testing,While Shut Down for Surveillance/Vent Header Installation Outage,Determined That Standby Liquid Control Pump B Did Not Meet Acceptance Criteria

ML19309H621
Person / Time
Site:	Hatch
Issue date:	05/05/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309H617	List: 05000366/LER-1980-050, Forwards LER 80-050/03L-0 05000366/LER-1980-050-03, /03L-0:on 800407,during ISI Pump Operability Testing,While Shut Down for Surveillance/Vent Header Installation Outage,Determined That Standby Liquid Control Pump B Did Not Meet Acceptance Criteria
References
LER-80-050-03L, LER-80-50-3L, NUDOCS 8005130567
Download: ML19309H621 (3)

LER-1980-050, /03L-0:on 800407,during ISI Pump Operability Testing,While Shut Down for Surveillance/Vent Header Installation Outage,Determined That Standby Liquid Control Pump B Did Not Meet Acceptance Criteria

Event date:
Report date:
3661980050R03 - NRC Website

text

Wi LICENSEE EVENT REPORT 80 0513 OSla7 O w,um-Cm i i

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8 9 LICENSEE CODE 14 IS LICENSE NUMBEH 26 2G LICENSE TYPE JO 57 CA E 58 lEn% LL_J@i ol 5101010 l 31 s i e l@l 0141017 I s l o i@l01 s 10 l con r O i

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8 GO 61 DOCKET NUMBER 03 69 EVENT DATE 74 7b REPORT DATE 80 EVENT DESCRIPTION AND PRoBA0LE CONSEQUENCES h lO 121 l During the performance of ISI pump operability testing while shutdown i

l l

l for a surveillance / vent header deflector installation outage, it was O 3 determined that Standby Liquid Control Pump "B" (2C41-C001B) did not i

O 4 i

imeet applicable acceptance criteria during initial testing (dP/dPp Wis i

O s l greater than the 1.09 limit allowed by ASME XI).

There were no effects I O c This is a repeti tive i

l0 lij i upon public health or safety due to this event.

1 occurrence - refer to LER #50-321/1980-026.

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to 11 12 13 18 19 20 REvtSION SEQUENTI AL OCCURRENCE REPORT EVE NT YE A R REPORT NO.

CODE TYPE NO.

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33 34 35 3G 37 40 41 gy 43 44 47 CAUSE DESCro?llON AND CORRECTIVE ACTIONS h JT]O] IThe exact cause of the pump apparently performinq better than at a pre-I i i Ivious date is not known; however, it seems to be edue to takinG dP read-I i 7 Iings (not a good indication of performance for th -i s type of pumps) in-I li131 i stead of flow readings.

Procedure was revised toi take flow re~adings.

I 1The unit is now in full comp'

• qnce writh no furthe r reporting required.

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8 9 ST S

% POWER OTHER STATUS IS fY

. DISCOVERY OFSCRIPTION I115 l l Gl@ l 0 l 0 l 0 l@l NA l

l Bl@l Pump SurvefTilance 1.

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AMOUNT OF ACTIVITY RELE ASED@Or HELE ASELz_Jgl NA l

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Lzl i o PEnSON~Et ExPOdl perative per the requirement of ASME section XI, IWP-323C).

The initial corrective action taken was to revise the prrocedure to change the upper limit for

" pump dynamic head" tm 1.30 per ASME section XI, IWP-3210 (refer to LER 50-3 E t /19 80-02 6 ) ;

the procedure, HNF-2-3702, was revised on 4 -G*. - 8 0.

Then, on 4-14-80, the procedure was run a g a'i n for botMi the "A"

and "B"

l pumps.

At that

time, it was discovered t *h a t neither pump would perform within the desired range - the, ratios (dP/dPg) were 1.39 and 1.45 for "A"

and "B" respectivchf.

The probicm with the differential p r e s s itu r e measurements appeared.to stem from the fact that the test wa s performed by l

pumping to and from a test tank with the pumqp discharp,e valve open.

Under this arrangement, the pump outpun pressure varied enough from test to test to make the ratiio unacceptabic.

Since this type of pump (i.e.

positive

<<id i s p l a c e m e n t )

is

-~

.g 4

• j

• y

1 designed to pump a

spec i fi ed flow rate at "an'"

output y

pressure, it was decided that taking differential pressure readings was not a 'true indicator of pump performance.

The procedure already required that a pump flow rate and an output

' pressure reading b e' made to satisfy Tech Specs section 4.1.5.c.2.

Thus, the procedure was revised (as permitted by ASME XI, IWP-3100) such that the pump discharge valve is throttled to obtain a reference output pressure (greater than or equal.to the 1190 psig required by Tech Specs), and then flow rate measurement is taken and compared t o. the reference flowrate.

The upper limit on the fl ow ratio was changed from "1.03" to "1.30" per ASME section XI, IWp-3210.

The procedure was revised on 4-17-80, and the pumps were tested and declared operable on 4-18-80.

The unit is in full compliance with applicabic requirements, and no further reporting is required.

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