ML19031A902

LER 1978-008-03 for Salem Unit 1 Boron Concentration

ML19031A902
Person / Time
Site:	Salem
Issue date:	03/02/1978
From:	Librizzi F Public Service Electric & Gas Co
To:	Grier B NRC/IE, NRC Region 1
References
LER 1978-008-03
Download: ML19031A902 (4)

Text

PS~G e

• ' Public Service Electric and Gas Company i

March 2, 1978 Mr. Boyce H. Grier Director of USNRC Off ice of Inspections and Enforcements Region 1 631 Park Avenu~

King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-08/03L P~rsuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1.b, we are submitting Licensee Event Report for Reportable Occurrence 78-08/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours,

~L~_.f.l.Y-F. P. Librizzi General Manager -

Electric Production CC: Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control 95-2001 300M 8-75

~eport Number:

e 78-08/03L Report Date: February 23, 1978 Occurrence Date: February 3, 1978 Facility: Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Inoperable Boron Injection Tank CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1 Reactor Power: 89%

DESCRIPTION OF OCCURRENCE:

At 1520 hours0.0176 days <br />0.422 hours <br />0.00251 weeks <br />5.7836e-4 months <br /> while decreasing reactor power to clean condensate pump strainers, boron samples showed 19,991 ppm boron in the BIT. BAT's showed 20,200 ppm boron. BIT concentration being below the 20,100 ppm boron allowed by Technical Specifications required Action Statement 3.5.4.1 to be implemented. Boric Acid Transfer Pumps were placed in fast speed to increase recirculation flow. At 1608 hours0.0186 days <br />0.447 hours <br />0.00266 weeks <br />6.11844e-4 months <br />, one batch of boric acid was added to the BAT's and fast recirculation flow continued.

BIT sampling continued on a 1/2 hour schedule. At 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br /> BIT samples showed 21,270 ppm boron and Action Statement 3.5.4.1 was terminated.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The cause of this occurrence was lack of mixing resulting from low recirculation flow.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.5.4.1 states that with the Boron Injection Tank inoperable, restore the tank to operable status within one hour or be in Hot Standby and borated to a shutdown margin equivalent to 1% ~K/K at 200°F within the next six hours-; - restore the tank to operable status within the next seven days or be in Hot Standby within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

The Boron Injection Tank was returned to operable status in 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 40 minutes. The load reduction was continued until the BIT was within the boron limits.

CORRECTIVE ACTION:

Addition of boric acid to the BAT's and fast speed recirculation flow re-established BIT boron concentration.

, LER 78-08/03L

• 2/23/78 A procedural revision will require fast speed recirculation flow to be run one shift per day to provide increased mixing.

FAILURE.DATA:

N/A Prepared by ~~~T~._L;;;;...;.."__;;;S~p~e~n~c~e~r~~

Manager Station SORC Meeting No. 10-78

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(II[] I The cause of this occurrence was boron stratification caused by OJI] low recirculation flow. A procedure change will require fast speed CTIIJ recirculation flow to be established for approximately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> per day. I OJI]

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