ML20050B704

Forwards LER 82-016/03L-0.Detailed Event Rept Encl

ML20050B704
Person / Time
Site:	Salem
Issue date:	03/26/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20050B705	List: ML20050B704 ML20050B706
References
NUDOCS 8204070259
Download: ML20050B704 (4)

Text

s O PSEG Put;!ic Servim Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station March 26, 1982 Q ~

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"3 E:E G 9 tv -

Mr. R. C. Ilaynes -

APR 7 1982t.- -

Regional Administrator 7- usmnenom 8 USNRC.

Region 1 E ACQ** /f f

631 Park Avenue 'b King of Prussia, Pennsylvania 19406 - 8'

Dear Mr. Ilaynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-16/03L Pursuant to the requirements of Salem Generating Station Unit No. 2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-16/03L. 'This report is required within thirty (30) days of the occurrence.

Sincerely yours,

//,f*Nh l 11 . J. Midura l General Manager -

Salem Operations i PD:al CC: Distribution t

1 9204070259 820326 (DRADOCK 05000311 I ftgg.L PDR. y 'h,, g g

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Report Number: 82-16/03L Report Date: 3-26-82 Occurrence Date: 02-26-82 and 02-27-82 Facility: '

Salem Generating Station, Unit'2 Public Service Electric & Gas Company

Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF~ OCCURRENCE

Axial Power Distribution - Out of Target Band.

This report was initiated'by Incident Reports82-042, 82-043 and 82-044.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 91% - Unit Load 1050 MWe DESCRIPTION OF OCCURRENCE:

On three occasions the Axial Power Distribution (AI) drifted out of the 25% target band due to a power reduction caused by clogged

{ screens tripping the circulator.

At 0454 hours0.00525 days <br />0.126 hours <br />7.506614e-4 weeks <br />1.72747e-4 months <br />, February 26, 1982, with reactor power greater than 90%, No. 21B circulator tripped, and since No. 21A circulator was out of service'for cleaning, a rapid load reduction was necessary due to partial loss of vacuum in No. 21 condenser. At 0457 hours0.00529 days <br />0.127 hours <br />7.556217e-4 weeks <br />1.738885e-4 months <br />, AI went out of the target band and Action Statement 3.2.1.a was entered.

At 0243 hours0.00281 days <br />0.0675 hours <br />4.017857e-4 weeks <br />9.24615e-5 months <br />, February 27, 1982, No. 21B circulator again tripped.

At 0245 hours0.00284 days <br />0.0681 hours <br />4.050926e-4 weeks <br />9.32225e-5 months <br /> No.~21A circulator was placed in service, while power

{ was being reduced. At 0302 hours0.0035 days <br />0.0839 hours <br />4.993386e-4 weeks <br />1.14911e-4 months <br /> No. 21A circulator tripped, and

, power was again reduced to minimize a loss of condenser vacuum. At 0308 hours0.00356 days <br />0.0856 hours <br />5.092593e-4 weeks <br />1.17194e-4 months <br />, with reactor power at 88%, AI went out of the target band and Action Statement 3.2.1.a was entered.

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At 1516 hours0.0175 days <br />0.421 hours <br />0.00251 weeks <br />5.76838e-4 months <br />, February 27, 1982, No. 21A circulator tripped, with No. 21B circulator out of service, and a load reduction was commenced.

. The AI went out of the target band at 80% reactor power at 1518 hours0.0176 days <br />0.422 hours <br />0.00251 weeks <br />5.77599e-4 months <br />, and Action Statement 3.2.1.a was entered.

This occurrence constituted operation in a degraded mode in accordance with Technical Specification 6.1.9.1.b.

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LER . 8 2-16/03L .,

DESIGNATION _OF APPARENT CAUSE OF OCCURRENCE:

J The AI excu_uing the !5% target band is inherent to rapid load reductions, which were necessary to minimize loss of condenser

. vacuum.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.2.1.a requires:

a. With the indicated Axial Flux Difference outside of the 5% target band about the target flux difference and with thermal power:

1. Above 90% of rated thermal power, within 15 minutes:

a. Either restore the indicated AFD to within the target band limits, or

b. Reduce thermal power to less than 90% of rated thermal power.

2. Between 50% and 90% rated thermal power:

a. Power operation may continue provided:

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1. The indicated AFD has not been outside I

of the 5% target band for more than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> penalty deviation cumulative during the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and i

2. The indicated AFD is within the limits shown on Figure 3.2-1. Otherwise, reduce thermal power to less than 50% of rated

, thermal power within 30 minutes and reduce the Power Range Neutron Flux-High 4

Trip Setpoints to less than or equal to 55% of rated thermal power within the

, next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

CORRECTIVE ACTION:

The AI.was restored to within the 15% target band at 0509, 0313, and 1533 hours0.0177 days <br />0.426 hours <br />0.00253 weeks <br />5.833065e-4 months <br />, respectively, and Action Statement 3.2.1.a was terminated. The time durations out of the target band were 12 minutes, 5 minutes, and.15 minutes, with a total time out,of the band on February 26, 12 minutes, and February 27, 20 minutes.

On February 27 bot circulators were returned to service, -

and power was stabilized at 70%.

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i LER 82-16/03L l FAILURE DATA:

Circulator Screen Clogged Prepared By F. Dickey /h <s m General Mdnager -

Salen Operations SORC Meeting No. 82-34 i

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