05000311/LER-1982-066, Forwards LER 82-066/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-066/03L-0.Detailed Event Analysis Encl
ML20062L224
Person / Time
Site: Salem PSEG icon.png
Issue date: 08/04/1982
From: Midura H
Public Service Enterprise Group
To: Haynes H
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20062L228 List:
References
NUDOCS 8208190003
Download: ML20062L224 (3)
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LER-1982-066, Forwards LER 82-066/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3111982066R00 - NRC Website
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text

9 O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station August 4, 1982 I

Mr.

R.

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

Dear Mr. Haynes:

LICENSE NO. DP R-7 5 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-066/03L Pursuant to the requirbments of Salem Generating Station Unit No.

2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-066/03L.

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

Sincerely yours, lf H.

J.

Midura General Manager -

Salem Operations f/)

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Report Number:

82-066/03L Report Date:

08-04-82 Occurrence Date:

07-20-82 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 82-186.

I CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 81% - Unit Load 880 MWe.

DESCRIPTION OF OCCURRENCE:

At 1545 hours0.0179 days <br />0.429 hours <br />0.00255 weeks <br />5.878725e-4 months <br />, July 20, 1982, during the performance of the monthly channel functional test for No. 21 Steam Generator Steam Flow Channel II, the high trip setpoint was found to exceed the Technical Specification limit.

The channel was declared inoperable, and Limiting Conditions for Operation 3.3.1 Action 7 and 3.3.2 Action 14 were entered.

The redun-dant channels were operable, however, and all bistables associated with No. 21 Steam Generator Steam Flow Channel II were placed in the tripped condition.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Channel II high steam flow trip setpoint was out-of-specification due to the failure of several capacitors in Modules 2FC-513 and 2FM-513E.

The failures were attributed to natural degeneration of the components with time.

ANALYSIS OF OCCURRENCE:

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

An excessive Steam /Feedwater Flow Mismatch signal coincident 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 main steam and feedwater isolations in the event of a steam leak.

Both functions are necessary to insure a minimum DNBR of 1.30 during normal operation and anticipated transients.

LER 82-066/03L -

ANALYSIS OF OCCURRENCE:Because the redundant channels were operable, no risk to the health or safety of the public was involved.

The occurrence constituted operation in a degraded mode permitted by limiting conditions for operation, and is reportable in accordance with Technical Specification 6.9.1.9.b.

Limiting Conditions 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

As noted, all Channel II bistables were tripped, in compliance with Actions 7 and 14.

All capacitors in the modules were replaced, and the channel functional test was satisfactorily completed.

No. 21 Steam Generator Steam Flow Channel II was declared operable at 1915 hours0.0222 days <br />0.532 hours <br />0.00317 weeks <br />7.286575e-4 months <br />, July 20, 1982, and Limiting Conditions for Operation 3.3.1 Action 7 and 3.3.2 Action 14 were terminated.

FAILURE DATA:

No. 21 Steam Generator Steam Flow Channel II had been declared inoperable on June 18, 1982, due to erratic indication.

The problem was assumed to be due to transmitter drift, and the sensor was recalibrated (see LER 82-052).

Due to the nature of the problem, the two occurrences may be related; corrective action taken in the second instance would likely address the previous problem.

Hagan Corporation Comparator Module 2FC-513 Signal Isolator 2FM-513E Prepared By _ R.

Frahm L/ k, [W

Genera'l Manager -

Salem Operations SORC Meeting No.

82-73

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