05000272/LER-1982-067, Forwards LER 82-067/03L-0.Detailed Event Analysis Encl

Forwards LER 82-067/03L-0.Detailed Event Analysis Encl

ML20063P733
Person / Time
Site:	Salem
Issue date:	09/29/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20063P734	List: 05000272/LER-1982-067, Forwards LER 82-067/03L-0.Detailed Event Analysis Encl 05000272/LER-1982-067-03, /03L-0:on 820912,no Indication of Svc Water Flow to Containment Fan Coil Unit 11 Noted While Coil Unit 14 Inoperable.Caused by Terminal Screw on Svc Water Flow Transmitter Breaking Off.Screw Replaced
References
NUDOCS 8210150127
Download: ML20063P733 (3)

LER-1982-067, Forwards LER 82-067/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721982067R00 - NRC Website

text

c 0 PSIEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station September 29, 1982 Mr.

R. C. Haynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 82-067/03L 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 82-067/03L.

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

I Sincerely yours,

}l 5 bkW l

H.

J.

Midura General Manager -

Salem Operations RF:ks[

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Report Number:

82-067/03L Report Date:

09-29-82 Occurrence Date:

09-12-82 Facility:

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

No, 11 Containment Fan Coil Unit - Inoperable.

This report was initiated by Incident Report 82-273.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 100% - Unit Load 1100 MWe.

DESCRIPTION OF OCCURRENCE:

At 1520 hours0.0176 days <br />0.422 hours <br />0.00251 weeks <br />5.7836e-4 months <br />, September 12, 1982, during routine operation, the Control Room Operator noticed that there was no indication of service water flow to No. 11 Containment Fan Coil Unit (CFCU).

The condition existed in both the high and low speed modes of operation.

Service water flow was audible in the piping to No, 11 CFCU, however.

At the time of the occurrence, No. 14 CFCU was ir perable due to planned maintenance, and Technical Specification ac cion Statement 3. 6. 2. 3.a was in ef fect.

No. 11 CFCU was declared inoperable and with two units inoperable, Action Statement 3.6.2.3.b was entered.

The other CFCU's and both containment spray systems were operable throughout the occurrence providing containment cooling capability.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Investigation of the problem revealed that a screw on the service water flow transmitter terminal strip had broken off resulting in an open signal loop.

The screw had evidently been overtightened and damaged during installation, and vibration caused it to break off.

Inspection of the terminal strip showed no other problems.

No similar failures have been observed, and the occurrence was assumed to be an isolated one.

ANALYSIS OF OCCURRENCE:

The CFCU's operate in conjunction with the containment spray systems to remove heat and radioactive contamination from the containment atmosphere in the event of a design basis accident.

Operability of fan coil groups and containment spray systems is necessary to ensure offsite radiation dose is maintained within the limits of 10CFR100.

LER 82-067/03L.

ANALYSIS OF OCCURRENCE:As noted, containment cooling capability was provided by redundant equipment.

The occurrence, therefore, involved no risk to the health or safety of the public.

Due to the loss of redundancy in engineered safety features, the event consti-tuted operation in a degraded mode permitted by the limiting conditions for operation and is reportable in accordance with Technical Specification 6.9.1.9.b.

Action Statement 3.6.2.3a requires:

With one group of CFCU's inoperable and both contain-ment spray systems operable, restore the inoperable group of cooling fans to operable status within 7 days, 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 in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

Action Statement 3.6.2.3.b requires:

With two groups of containment cooling fans inoperable, restore at least one group of cooling fans 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 in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

CORRECTIVE ACTION

Maintenance on No. 14 CFCU was completed and the unit was satis-factorily tested.

No. 14 CFCU was declared operable, and at 1715 hours0.0198 days <br />0.476 hours <br />0.00284 weeks <br />6.525575e-4 months <br />, September 12, 1982, Action Statement 3.6.2.3.b was terminated.

Action Statement 3.6.2.3.a remained in effect, however.

At 0959 hours0.0111 days <br />0.266 hours <br />0.00159 weeks <br />3.648995e-4 months <br />, September 13, 1982, No. 14 CFCU was again declared inoperable for planned maintenance and Action Statement 3.6.2.3.b was entered for a second time.

The broken screw on No. 11 CFCU was replaced and the unit was satisfactorily tested.

At 1523 hours0.0176 days <br />0.423 hours <br />0.00252 weeks <br />5.795015e-4 months <br />, September 13, 1982, No. 11 CFCU was declared operable and Action Statement 3.6.2.3.b was again terminated.

No further action was deemed necessary in view of the isolated nature of the problem.

No. 14 CFCU was subsequently returned to an operable status and Action Statement 3.6.2.3.a was terminated within the time interval specified.

FAILURE DATA:

Not Applicable

/

Prepared By R.

Frahm Gen'eral Manager -

Salem Operations SORC Meeting No.

82-87