ML18139A530

LER 80-020/03L-0:on 800822 After Boric Acid Batching,Chemist Reported Concentration Above Tech Spec Requirements.Caused by Transfer of Batch Tank to Inservice Bast.Manual Shutdown Initiated & Boric Acid Diluted to Tech Spec Limits

ML18139A530
Person / Time
Site:	Surry
Issue date:	09/19/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A527	List: ML18139A526 ML18139A528 ML18139A529 ML18139A530
References
LER-80-020-03L-02, LER-80-20-3L-2, NUDOCS 8009240473
Download: ML18139A530 (2)

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LICENSEE EVENT REPORT e CONTROL BLOCK: ._I 1

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I Following Boric Acid batching (while Unit No. 2 was at 62 % power) the station chemist reported a Boric Acid concentration of 13.2% in the Unit's Boric Acid Storage Tank and Boron Injection Tank. This is les 9 conservative with respect to the requirements of T.S.3.2.B.3 and T.S.3.3.A.3 and is reportable per T.S.6.6.2.b.(2)

Redundant systems were operable and had the required capability for reactor control.

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

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The cause 1.S determinned -t-0 be the i::rans'fering of the Batch Tank directly to an

_inservice Bast. The immediate corrective action was to initiate manual shut down DJ)) .I of the reactor and to !iilute the.B.oric Acid tc Tech. Spec. Lim;i.ts (11.5-13%).

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NAMEOFPREPARER J. L. Wilson PHONE: _(.a..;8:..;0'-4'""')--"'3-"-5""-7--"--31=8=-4.;.___ _ __ Q.

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ATTACHMENT 1 SURRY POWER STATION UNIT NO. 2 DOCKET NO: 50-281 REPORT NO: 80-020/031-0 EVENT DATE: 08-22-80 TITLE OF REPORT: EXCESSIVE BORIC ACID IN BAST "C" AND BIT

1. Description of Event:

Following Boric Acid Batching grom 1-CH-TK-5 to 1-CH-TK-lC (while Unit No.2 was at 62% power) the station chemist reported a Boric Acid concentration of 13.2% in 1-CH-TK-lC and 2SI-TK-2. The range allowable by T.S 3.2 and 3.3 is 11.5-13%.

2. Prob?ble Consequences/Status of Redundant Systems:

1-CH-TK-lC provide Boric Acid for reactor control for Unit No. 2. Redundant system were operable. Adequate capability for reactor control was available at all times. Therefore the health and safety of the public were not affected.

3. Cause of the Event:

The cause of the event was caused by transfering the batch tank to an inservice BAST.

4. Immediate Corrective Action:

Immediate corrective action was to initiate reactor shutdown and to dilute the Boric Acid to within specifications.

5. Scheduled Corrective Action:

None

6. Action Taken to Prevent Recurrence:

A change to OP-8.5 has been initiated to require that all transfers of Boric Acid to an inservice tank are made from tanks of known coneentrations.

7. Generic Implications None