05000311/LER-1982-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-052/03L-0.Detailed Event Analysis Encl
ML20055B614
Person / Time
Site: Salem 
Issue date: 07/07/1982
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20055B615 List:
References
NUDOCS 8207220553
Download: ML20055B614 (3)
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LER-1982-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3111982052R00 - NRC Website
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text

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O PSEG Put>he Ser vice Electric and Gas Cornpany P.O. Box E Hancocks Bridge. New Jersey 08038 Salem Generating Station July 7, 1982 Ar.

R.

C.

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

Dear Mr. Haynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-052/03L 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 82-052/03L.

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

Sincerely yours,

/*k N

H.

J.

Midura General Manager -

Salem Operations RF:ks CC:

Distribution 8207220553 820707 PDR ADOCK 05000311 S

PDR The Energy People v a.. n w

Report Number:

82-052/03L Report Date:

07-07-82 Occurrence Date:

06-18-82 Facility:

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

No. 21 Steam Generator Steam Flow Channel II - Inoperable.

This report was initiated by Incident Report 82-156.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 100% - Unit Load 1130 MWe.

DESCRIPTION OF OCCURRENCE:

At 1325 hours0.0153 days <br />0.368 hours <br />0.00219 weeks <br />5.041625e-4 months <br />, June 18, 1982, during a routine channel check, the Control Room Operator observed that No. 21 Steam Generator Steam Flow Channel II was indicating 4% lower than the redundant channel.

A qualitative assessment of actual steam flow showed that Channel II indication was low.

At 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br />, the channel was declared inoperable, and Technical Specification Limiting Conditions for Operation 3.3.1 Action 7 and 3.3.2 Action 14 were entered.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Steam Flow Transmitter 2FT-513 calibration had drifted, resulting in the low indication.

A new transmitter had been installed and calibrated on August 30, 1981, with no problems noted since that time.

The event was therefore, assumed to be an isolated one.

ANALYSIS OF OCCURRENCE:

The Steam Generator Steam Flow signal is utilized in both the Reactor Trip System and the Engineered Safety Feature Actuation System.

An excessive Steam /Feedwater Flow Mismatch signal co-incident with a Low Steam Generator Level signal initiates a

. reactor trip to prevent power operation without a proper heat sink.

This trip is redundant to the Steam Generator Water Level-Low Low trip.

High steam flow coincident with either low Tave or low steam pressure initiates a turbine trip, safety injection, and feedwater isolation, in the event of a steam leak.

i

=_

/

Both functions are necessary to insure core thermal limits are not exceeded.

Due to operable redundant channels, however, no risk to the health or safety of the public was involved.

As such, the-occurrence constituted operation in a degraded mode permitted by a limiting condition for operation, and is reportable in accordance with Technical Specification 6.9.1.9.b.

Limiting Condition for Operation 3.3.1 Action 7 and 3.3.2 Action 14 require:

With the number of operable channels one less than the total number of channels, power operation may proceed until performance of the next required channel functional test, provided the inoperable channel is placed in the tripped condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

CORRECTIVE ACTION

At 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br />, all Channel II bistables were tripped in compliance with Actions 7 and 14.

The flow transmitter was recalibrated and returned to service; a channel check was satisfactorily performed.

At 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br />, June 24, 1982, the channel was declared operable, and Limiting Conditions for Operation 3.3.1 Action 7 and 3.3.2 Action 14 were terminated.

Due to the isolated nature of the incident, no further action was deemed necessary to prevent recurrence.

FAILURE DATA:

Not Applicable.

Prepared By R.

Frahm j

~

General Manager -

Salem Operations SORC Meeting No.82-67B w

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