ML18085B140

Forwards LER 81-022/03L-0.Detailed Event Analysis Encl

ML18085B140
Person / Time
Site:	Salem
Issue date:	03/23/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18085B141	List: ML18085B140 ML18085B143
References
NUDOCS 8104020620
Download: ML18085B140 (3)

Text

e PS~G Public Service Electric and Gas Company 80 Park Plaza Newark. N.J. 07101 Phone 201/430-7000 March 23, 1981 Mr. Boyce H. Grier Director of USNRC Off ice of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 81-22/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 81-22/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours,

~?-~,(

. ~ ,/ - --

R. A. Uderitz General Manager -

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

Director, Office of Management Information and Program Control

( 3 copies)

Report Number: 81-22/03L Report Date: March 23, 1981 Occurrence Date: 3/1/81 Facility: Salem Generating Station - Unit 1 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Boric Acid Storage System Volume Less than Technical Specification Limit of 5106 Gallons CONDITIONS PRIOR TO OCCURRENCE:

Plant being cooied down to enter Mode 5 (Cold Shutdown) following reactor trip.

DESCRIPTION OF OCCURRENCE:

Following a reactor trip at 1301 hours0.0151 days <br />0.361 hours <br />0.00215 weeks <br />4.950305e-4 months <br /> on March 1, 1981, the Reactor Coolant System was rapidly borated because of two inoperable rod position indicators. This resulted in the volume of the Boric Acid Storage System becoming less than the minimum Technical Specif ic~tion requirement of 5106 gallons (70%) . Action Statement 3.1.2.8 was entered at 2245 hours0.026 days <br />0.624 hours <br />0.00371 weeks <br />8.542225e-4 months <br /> on March 1, 1981 when the volume decreased to 69% of the Technical Specification requirement.

Batching was commenced and the volume was raised to 95% (th~admin istrative limit) of the system's capacity at 2400 hours0.0278 days <br />0.667 hours <br />0.00397 weeks <br />9.132e-4 months <br /> on March 1, 1981. The Action Statement was terminated at 0550 hours0.00637 days <br />0.153 hours <br />9.093915e-4 weeks <br />2.09275e-4 months <br /> on March 2, 1981 when Operational Mode 5 was entered. This occurrence constituted operation in a degraded mode IAW TS 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Rapid boration and the use of borated water from the.Boric Acid Storage System for makeup resulted in the minimum required volume to decrease below 5106 gallons (70%).

ANALYSIS OF OCCURRENCE:

Technical Specifications require that with the Boric Acid Storage System inoperable, restore the storage system to operable status within the next 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least hot standby within the next six hours and borated to a shutdown margin equivalent to at least 1% 6 K/K at 200°F, restore the Boric Acid Storage System to operable status within the next seven days or be in cold shutdown within the next 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

LER 81-22/03L 3/23/81 CORRECTIVE ACTION:

Batching was commenced at 2245 hours0.026 days <br />0.624 hours <br />0.00371 weeks <br />8.542225e-4 months <br /> on March 1, 1981 and the volume was raised to 95% (the administrative limit) of the system's capacity at 2400 hours0.0278 days <br />0.667 hours <br />0.00397 weeks <br />9.132e-4 months <br /> on March 1, 1981.

FAILURE DATA:

Not Applicable Prepared By W. J. Steele r - Salem nerating Station SORC Meeting No. 81-19