05000281/LER-1981-040-03, /03L-0:on 810626,boric Acid Storage Tank a Overflowed Into Boric Acid Storage Tank C,Diluting Tank C Below Tech Spec Limits.Caused by Inadvertent Alignment of Primary Grade Water to Suction of Boric Acid Transfer Pump

/03L-0:on 810626,boric Acid Storage Tank a Overflowed Into Boric Acid Storage Tank C,Diluting Tank C Below Tech Spec Limits.Caused by Inadvertent Alignment of Primary Grade Water to Suction of Boric Acid Transfer Pump

ML20009F952
Person / Time
Site:	Surry
Issue date:	07/24/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F945	List: 05000281/LER-1981-040-03, /03L-0:on 810626,boric Acid Storage Tank a Overflowed Into Boric Acid Storage Tank C,Diluting Tank C Below Tech Spec Limits.Caused by Inadvertent Alignment of Primary Grade Water to Suction of Boric Acid Transfer Pump 05000281/LER-1981-041-03, /03L-0:on 810626,discovered That Recirculation Spray HX Svc Water Radiation Monitoring Pump Would Not Operate.Caused by Hardened Sediment on Pump Internals Which Prevented Pump from Rotating.Pump Cleaned & Adjusted ML20009F943
References
LER-81-040-03L-02, LER-81-40-3L-2, NUDOCS 8108030190
Download: ML20009F952 (2)

LER-1981-040, /03L-0:on 810626,boric Acid Storage Tank a Overflowed Into Boric Acid Storage Tank C,Diluting Tank C Below Tech Spec Limits.Caused by Inadvertent Alignment of Primary Grade Water to Suction of Boric Acid Transfer Pump

Event date:
Report date:
2811981040R03 - NRC Website

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NmcFORM344 U. S. NUCLEA3 EEEULATor.Y COMMISSION ri.nl LICENSEE EVENT REPORT e@

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s0 EvEN1 DE3tRIPTION A40 PROBA8LE c0NSEQUENCES h Ioi2! IDuriao steady state ooeration of unit 2. the suction to Boric Acid Transfer onmn Io isi I A was aligned to Primary Grade Water Supply. This resulted in the everflow of I

I oric Acid Storage Tank A into BAST C and the dilution of C below T.S.

limit for i

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l lo!s_1 l Boric Acid Concentration of 11.5%. This event is contrary to T.S. 3.2.B.3 and I

loest freportable oer T.S. 6.6.2.a.(6).

The alternate source of Borated Water. the stWST.

loi?l (remained unaffected:

therefore. the health and safety of the caneral nuh11e were I

I iois1 Inot affected.

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.a 44 47 cAusE DESCRIPTION AND commEcTIVE ACTIONS h tiio;IThe ca m of this event was the inadvertent allonment of orimarv orade water to the I

i,,,, l suction of Boric Acid Transfer Pumo A".

Boric Acid Storace, Tank "A" overflowed i

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,,,7, i into C Tank, and reduced its Boric Aciel Concentration.

The concentratior of Boric l

,,,3, l Acid was increased in Tank "C" and verified by samoles to be within specification.

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PDR ADOCK 05000281 S

PDR

ATD O NENT 1 SURRY PGER STATIGT, UNIT NO. 2 DOCKET N0:

50-281 REPORP NO:

81-040/03Ir-0 Emr DAIE: 06-26-81 TITLE CF EVEtC:

'C' BORIC ACID TANK CUT OF wtLirICATICN 1.

DESuumCN OF EVENT:

During steady state 100% power operation of Unit 2, the suction to Boric Acid Transfer Pump 'A' was aligned to a primary grade water supply. 'Ihis resulted in the overflow of Boric Acid Storage Tank (BAST)

'A' into BAST 'C' and the dilut.lon of

'C' BAST to a minimLxn of 10.9% boric acid, mis is contrary to T.S. 3.2.B.3 which requires a mininun 11.5% concentration, and reportable per T.S. 6.6.2.a. (6).

2.

PB01ABLE CONSDQUSEES:

Since the alternate source of borated water, the RWST, and the boric acid ecm-centration of the etcrage tank restored within tne time period specified in T.S. 3.0.1, the health and safety of the general public were not affected.

3.

CAUSE

Prirary Grade Water was inadvertently aligned to the suction of Horic Acid Transfer Ptznp 'A'. Bis resulted.in the overflow of BAST

'A' into BAST 'C' and the dilution of 'C' below the technical specification limit by 0.6% boric acid concentration.

4.

IBHEDIATE COmtunVE ACTIQ 1:

'Ihe iMinte cuu.Ective acticn was to add boric acid ~to 'C! BAST to return concen-tration to within technic.d spcr.ification limits.

l 5.

SUBSEQUENT CustLnVE ACTICH:

'Ihe BAST was resampled to \\M proper concentraticn.

6.

EUIURE ACTICNS:

'Ihe importance of proper valve alignment has been re-egtasized to Operatiara personnel.

7.

NC IMPLICATICNS:

None.

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