05000361/LER-1983-006, Forwards LER 83-006/03L-0.Detailed Event Analysis Submitted

Forwards LER 83-006/03L-0.Detailed Event Analysis Submitted

ML20064L405
Person / Time
Site:	San Onofre
Issue date:	02/03/1983
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20064L407	List: 05000361/LER-1983-006, Forwards LER 83-006/03L-0.Detailed Event Analysis Submitted 05000361/LER-1983-006-03, /03L-0:on 830107,train B Analyzer 2/3 AIT-9782D2 Failed to Meet Channel Functional Test Per Tech Spec Surveillance Requirement 4.3.2.1 & Declared Inoperable. Caused by Faulty Sample Cell.Cell Replaced
References
NUDOCS 8302150245
Download: ML20064L405 (2)

LER-1983-006, Forwards LER 83-006/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
3611983006R00 - NRC Website

text

%y

? FED

/gf Southern California Edison Company Q,7 yL S AN ONOFRE NUCLE AR GENER A TING S T A TION

/

P.O. B o x 12 8 5 AN C LEMENTE. C A LIFORNI A 92672

',7 H. B. R A Y

1. ["

vetspwo%g

" * " ~ " " ~ ^ " "

February 3, 1983 U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention:

Mr. R. H. Engelken, Regional Administrator

Dear Sir:

Subject:

Docket No. 50-361 and 50-362 30-Day Report Licensee Event Report No.83-006 (Docket No. 50-361)

San Onofre Nuclear Generating Station, Units 2 & 3 Pursuant to Section 6.9.1.13.b of Appendix A, Technical Specifications to Facility Operating Licenses NPF-10 and NPF-15 for San Onofre Units 2 and 3, respectively, this submittal provides the required 30-day written report and a copy of Licensee Event Report (LER) for an occurrence involving Limiting Condition for Operation (LCO) 3.3.2 associated with the Toxic Gas Isolation System (TGIS). Since this occurrence involves a shared system between Units 2 and 3, in accordance with NUREG 0161, a single LER for Unit 2 (Docket No. 50-361) is enclosed.

On January 7,1983 Units 2 and 3 were in Modes 1 and 4, respectively, and the monthly TGIS channel check surveillance in accordance with Procedure S023-11-1.15 was in progress. Train B ammonia analyzer 2/3 AIT-978202 failed the channel functional test required by Technical Specifict. tion Surveillance Requirement 4.3.2.1.

Consequently, the analyzer was declared inoperable at 1300 and the appropriate Action Statement associated with LC0 3.3.2 was invoked. As required by this Action Statement (Table 3.3-3-Action 14), actions to restore the inoperable analyzer within 7 days were initiated.

i 8302150245 830203 PDR ADOCK 05000361 S

PDR j'11

&&u

R. H. Engelken February 3,1983 Subsequent investigation into the cause of this occurrence indicated that the inoperability of the analyzer was due to a faulty sample cell.

This sample cell contains a known concentration of ammonia and is placed between the infrared light source and the detect';r within the analyzer to verify proper response of the analyzer. The sample cell was replaced and the analyzer was declaked operable in accordance with Procedure S023-II-1.15 at 1100 on January 8,1983. This was an isolated occurrence and no further corrective action is planned.

Enclosed LER 83-006 addresses this event.

There was no impact on plant operation or the health and safety of plant personnel or the public as a result of this occurrence, since the redundant Train A analyzer remained operable throughout the event.

l If there are any questions regarding the above, please contact me.

Sincerely,

/

u cc:

A. E. Chaffee (USNRC Resident Inspector, San Onofre Units 2 & 3)

R. J. Pate (USNRC Resident Inspector, San Onofre Units 2 & 3) i U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement U. S. Nuclear Regu!atory Consnission Office of Management Information and Program Control Institute of Nuclear Power Operations