05000311/LER-1982-155, Forwards LER 82-155/03L-0.Detailed Event Analysis Encl

Forwards LER 82-155/03L-0.Detailed Event Analysis Encl

ML20028D656
Person / Time
Site:	Salem
Issue date:	01/05/1983
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028D658	List: 05000311/LER-1982-155, Forwards LER 82-155/03L-0.Detailed Event Analysis Encl 05000311/LER-1982-155-03, /03L-0:on 821224,containment Fan Coil Unit 23 Svc Water Flow Found Less than Tech Specs.Cause Not Stated.Back Pressure Control Valve 23SW57 Locally Cycled to Flush Out Svc Water Piping & Return Flow to Normal
References
NUDOCS 8301190341
Download: ML20028D656 (3)

LER-1982-155, Forwards LER 82-155/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982155R00 - NRC Website

text

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- 'O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station January 5, 1983 Mr.

R.

C.

Haynes

~

Regiona1 Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

i LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-155/03L Pursuant to the requirements of Salem Generating Station i

Unit No. 2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-155/03L.

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

Sincerely yours,

/

l H. J. Midura l

General Manager -

Salem Operations RF:ksf CC:

Distribution 8301190341 830105 i

PDR ADOCK 05000311 PDR 1

g The Energy People gW 95-2180 (20W 1181

R*eport Number:

82-155/03L Report Date:

01-05-83 Occurrence Date:

12-24-82 Facility:

Salem Generating Station Unit 2 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Containment Systems - No. 23 Containment Fan Coil Unit - Inoperable.

This report was initiated by Incident Report 82-518.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - RX Power 68 % - Unit Load 720 MWe.

DESCRIPTION OF OCCURRENCE:

At 0430 hours0.00498 days <br />0.119 hours <br />7.109788e-4 weeks <br />1.63615e-4 months <br />, December 24, 1982, during routine operation, the Control Room Operator observed that No. 23 Containment Fan Coil Unit (CFCU) service water flow was approximately 1850GPM.

This is less than the 2500GPM required by the Technical Specifications for the low speed mode of operation.

The unit was declared inoperable and Technical Specification Action Statement 3.6.2.3a was entered, retroactive to the time of discovery.

Redundant CFCU's and both containment spray systems were operable throaghout the occurrence.

APPARENT CAUSE OF OCCURRENCE:

Calibration of the outlet flow transmitter was checked and was satisfactory.

Back Pressure Control Valve 23SW57 was locally cycled several times to flush out the service water piping to the CFCU.

Following these measures service water flow returned to specification; the occurrence was attributed to silt restricting service water flow to the fan coil unit.

i ANALYSIS OF OCCURRENCE:

j The CFCU's operate in conjunction with the containment spray systems to remove heat and radioactive contamination from the containment i

atmosphere in the event of a design basis accident.

Operability of this equipment is necessary to ensure offsite radiation dose is maintained within the limits of 10CFR100, i

l Action Statement 3.6.2.3a Requires:

With one group of the above required cooling fans inoperable and j

both containment 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 />.

r LER 82-155/03L o ANALYSIS OF OCCURRENCE: (cont'd)

Containment cooling capability was provided by the redundant CFCU's and the containment spray systems.

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

Due to the loss of redundancy in engineered safety features, the event constituted operation in a degraded mode permitted by the limiting conditions for operation.

The occurrence is reportable in accordance with Technical Specification 6.9.1.9b.

CORRECTIVE ACTI_QH:

As noted, cycling the back pressure control valve eliminated the problem.

The CFCU was satisfactorily tested, the unit was declared operable, and Action Statement 3.6.2.3a was terminated at 1517 hours0.0176 days <br />0.421 hours <br />0.00251 weeks <br />5.772185e-4 months <br />, December 24, 1982.

FAILURE DATA:

Not applicable Prepared by R.

Frahm

/

Generdl Manager -

Salem Operations SORC Meeting No.

83-02 l

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l 1

3 I

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