05000272/LER-1982-026, Forwards LER 82-026/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-026/03L-0.Detailed Event Analysis Encl
ML20052E918
Person / Time
Site: Salem PSEG icon.png
Issue date: 04/28/1982
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20052E919 List:
References
NUDOCS 8205110538
Download: ML20052E918 (4)
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LER-1982-026, Forwards LER 82-026/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
2721982026R00 - NRC Website
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- O PSIEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge New Jersey 08038 Salem Generating Station April 28, 1982 co Mr.

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USNRC Region 1 1/

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Dear Mr. Haynes:

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/)]g o LICENSE NO. DP R-7 0 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 82-026/03L Pursuant to the requirements of Salem Generating Station Unit No. 1, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-026/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours, f ~d N*

H. J. Midura General Manager -

Salem Operations RF:ks CC:

Distribution 8205110538 820428 DR ADOCK 03000272 f6,W PDR j, y

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Deport Number:

82-026/03L Report Date:

04-28-82 Occurrence Date:

04-09-82 Facility:

Salem Generating Station, Unit 1 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Boric Acid Storage Tanks and Boron Injection Tank -

Concentration Out of Specification.

This report was initiated by Incident Reports82-077, 82-082,82-083 and 82-084.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 3 - Rx Power 0% - Unit Load 0 MWe.

DESCRIPTION OF OCCURRENCE:

On three different occasions, Nos. 11 and 12 Boric Acid Storage Tanks (BAST's) and Boron Injection Tank (BIT) boron con-centrations decreased below the Technical Specification limit of 20,100 ppm boron.

On April 9, 1982, sample results from the BAST's and BIT were 19,580 ppm, 19,597 ppm and 19,272 ppe respectively.

Nos. 11 and 12 BAST's and the BIT were declared inoperable, and at 1230 hours0.0142 days <br />0.342 hours <br />0.00203 weeks <br />4.68015e-4 months <br />, Action Statements 3.1.2.8.a and 3.5.4.1 were entered.

The BAST's and BIT were restored to an operable status, and on April 13th, the boron concentrations again decreased below the specification limits.

Nos. 11 and 12 BAST's and the BIT were l

j declared inoperable at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, and Action Statements 3.1.2.8.a and 3.5.4.1 were entered for a second time.

Later that day, after batching had increased tank boron con-centrations, sample results showed the BIT was belcw speci-fication for a third time.

The BAST's and BIT were declared inoperable, and at 2020 hours0.0234 days <br />0.561 hours <br />0.00334 weeks <br />7.6861e-4 months <br />, Action Statements 3.1.2.8.a and 3.5.4.1 were entered.

These occurrences constituted operation in a degraded mode in accordance with Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The decreases in the BAST and BIT boron concentration resulted from the leakage of charging water past a damaged seat on Valve 1SJ4.

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c LER 82-026/03L..

ANALYSIS OF OCCURRENCE:

Technical Specification 3.1.2.8.a requires:

With the boric acid storage system inoperable and being used as one of the required borated water sources, restore the storage system to operable status within 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 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and borated to a shugdown margin-equivalent to at least 1%

delta k/k at 200 F; restore the boric acid storage system to operable status within the next 7 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 />.

Technical Specification 3.5.4.1 requires:

With the BIT inoperable, restore the tank to operable status within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, or be in hot standby and borated to a shutdown margin equivalent to 1% delta k/k at 200 F within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />; restore the tank to operable status within the next 7 days or be in hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

CORRECTIVE ACTION

On April 9, 1982, the Reactor Coolant System was alreagy borated to a shutdown margin equivalent to 5% delta k/k at 200 F, in compliance with Action Statement 3.5.4.1.

At 2340 hours0.0271 days <br />0.65 hours <br />0.00387 weeks <br />8.9037e-4 months <br />, sample results showed No. 11 BAST boron concentration was 20,610 ppm.

The tank was declared operable, and Action State-ment 3.1.2.8.a was terminated.

At 0215 hours0.00249 days <br />0.0597 hours <br />3.554894e-4 weeks <br />8.18075e-5 months <br />, April 10, 1982, results of the BIT boron analysis indicated 20,665 ppm.

The BIT was declared operable, and Action Statement 3.5.4.1 was terminated.

On April 13, 1982, boric acid addition to the BAST's and BIT was commenced.

The shutdown margin was increased by control red in-sertion, and Mode 3 was entered in preparation for complianen with Action Statement 3.5.4.1.

At 1921 hours0.0222 days <br />0.534 hours <br />0.00318 weeks <br />7.309405e-4 months <br />, sample results showed No. 11 BAST was within specification.

The tank was de-clared operable, and Action Statement 3.1.2.8.a was terminated.

At 1956 hours0.0226 days <br />0.543 hours <br />0.00323 weeks <br />7.44258e-4 months <br />, sampling indicated BIT boron to be within limits.

The BIT was declared operable, and Action Statement 3.5.4.1 was terminated.

An investigation was initiated to determine the source of the BAST and BIT dilution.

When, at 2020 hours0.0234 days <br />0.561 hours <br />0.00334 weeks <br />7.6861e-4 months <br />, sample results showed the BIT boron concen-tration had decreased for a third time, the Reactor Coolant System was immediately gorated to a shutdown margin equivalent to 1%

delta k/k at 200 F.

It was determined that the dilution flow path was through Valves 1SJ4 and/or 1SJ5, and a plant cooldown was commenced to repair the valve (s).

Mode 4 was entered at 0840 hours0.00972 days <br />0.233 hours <br />0.00139 weeks <br />3.1962e-4 months <br />, April 14, 1982, and Action Statement 3.5.4.1 was terminated.

At 1350 hours0.0156 days <br />0.375 hours <br />0.00223 weeks <br />5.13675e-4 months <br />, Mode 5 was entered, and Action Statement 3.1.2.8.a was terminated.

Valve 1SJ4 was found to have a damaged seat, and was properly repaired.

LER 82-026/03L - ~

FAILURE DATA:

Darling Valve and Mfg. Co.

4 inch Motor Operated Gate Valve

. Type S350WDD i

Prepared By R. Frahm

/.h Genefal Manager -

Salem Operations SORC Meeting No.

82-45 I

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