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
References
NUDOCS 8209020189
Download: ML20063H900 (3)

LER-2082-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2722082052R00 - 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 [

CC: 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:

- --- (continued) ,

j Limitin71 Condition for Operation 3.3.3.7 Action 5 requires:

WitN the number cf operable RCS subcooling margin

• i monitor channels less than the required number, 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

i.- CORRECTIVE ACTION:

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-i

• stored to the process comonter and the subcooling margin monitor ,

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 t

General Manager -

) . Salem Operations 82 77

~

SORC Meeting No.

4

\*

e 4

n. .

b s

d N

4 ,-,,-,e-., - - , . , , -