05000272/LER-1982-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl

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

ML20063H900
Person / Time
Site:	Salem
Issue date:	08/18/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20063H902	List: 05000272/LER-1982-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl 05000272/LER-1982-052-03, /03L-0:on 820729,control Room Operator Observed RCS Subcooling Margin Recorder Had Failed.Data Points for Monitor Had Been Removed from Process Computer During Sys Maint Earlier That Day.Points Restored
References
NUDOCS 8209020189
Download: ML20063H900 (3)

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

Event date:
Report date:
2721982052R00 - NRC Website

text

.

O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station August 18, 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 82-052/03L 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 82-052/03L.

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

Sincerely yours,

)

b h le w H.

J.

Midura General Manager -

Salem Operations RF:ks

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Distribution F

8209020189koh22 DR ADOCK O PDR The Energy People ~

g6tL 95 2129 COW 1181

' Report Number:

82-052/03L Report Date:

08-18-82 Occurrence Date:

07-29-82 Facility:

Salem Generating Station, Unit 1 Public Service Electric & Gas Company i

!!ancocks Bridge, New Jerscy 08038 i

IDENTIFICATION OF OCCURRENCE:

Reactor Coolant System Subcooling Margin Monitor - Inoperable.

This report was initiated by Incident Report 82-202.

CONDITIONS PRIOR TO OCCURRENCE:

j Mode 1 - Rx Power 82% - Unit Load 230 MWe.

I DESCRIPTION OF OCCURRENCE:

a At 0409 hours0.00473 days <br />0.114 hours <br />6.762566e-4 weeks <br />1.556245e-4 months <br />, July 29, 1982, during routine operation, the Control Room Operator noticed that the Reactor Coolant System (RCS) subcooling margin recorder indication had failed to the low end of its scale.

Attempts to bootstrap the process computer failed to correct the problem, and the subcooling margin monitor was declared inoperable.

Limiting Condition for Operation 3.3.3.7 Action 5 was entered, retro-active to the time of discovery of the failure.

Wide range.

RCS pressure and outlet temperature indications were operable, and steam tables were available in the control room throughout the occurrence.

The computer points for delta Psat and delta Tsat were manually added to the computer trend printout.

j DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The points for the subcooling monitor had been removed from the process computer when it had been flushed for maintenance earlier tLat day; restoration of the points was overlooked following completion of the maintenance.

No previous occurrences of this type have been noted, and the problem was assumed to be an isolated one.

ANALYSIS OF OCCURRENCE:

s The operability of accident monitoring instrumentation ensures that, during and following an accident, important plant para-meters can be monitored.

Due to the availability of redunda'nt monitoring capabilities, no risk to the health and safety of the public was involved.

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

a

i

~

LER 82-052/03L '

l ANALYS.IS OF GCCURRENCE:- ---

Limitin7 j

1 Condition for Operation 3.3.3.7 Action 5 requires:

WitN the number cf operable RCS subcooling margin monitor channels less than the required number, i

operation may proceed provided that steam. tables are available in the Control Room and an RCS wide i

range pressure and outlet temperature channel each are operable to provide an alternate means of calculating RCS subcooling margin, i.-

CORRECTIVE ACTION

I As noted, wide range RCS pressure and temperature indication were operable and steam tables were avai.lable, in compliance

(,

with the action statements The missing data points were re-stored to the process comonter and the subcooling margin monitor i

returned to operation.

The monitor was declared operable at i

0845' hours, July 29, 1982, and Limiting Condition for Operation 3.3.3.7 Action 5 was terminated.

Personnel involved in the i

incident were counseled concerning the importance of re-programming the computer followfng theuf. lushing operation; a

sign was placed on the computer cubicle door reminding personnel-of the need for complete reprogramming.

FAILURD DATA:

Not 3pplicable.

i Prepared'By R.

Frahm

// W/s General Manager -

t

)

Salem Operations

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SORC Meeting No.

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