ML20090D841
| ML20090D841 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/25/1974 |
| From: | Carroll J JERSEY CENTRAL POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-50-219-74-60, NUDOCS 8303030234 | |
| Download: ML20090D841 (4) | |
Text
-
t
,73 L,
'..J g %,'
J To:
James P. O'Reilly Directorate of P,cgulatory Operations Region I
' 'i 631 Park Avenue
"'t King of Prussia, Pennsylvania 19406
- f From
Jersey Central Power S Light Company Oyster Creek Nuclear Generating Station Docket #50-219 Forked P.iver, New Jersey 08731
Subject:
Abnorrral Occurrence Report No. 50-219/74/60 The following is a preliminary report being submitted in compliance with the Technical Specifications, paragraph 6.6.2.
Preliminary Approval:
/
l h/t -
' ,f/ d 11/25/74 7
[J.T. Carroll,Jr.[/
Date i
cc:
Mr. A. Cianbusso,
$0fK050IIES sis 4
COPY SENT REGION. <a
y Initial Telephone
\\ .
Date of Repprt Yate:
11/22/74 Occurrence:
11/22/74 Initial Written Time of Report Date:
11/25/74 Occurrence:
1045 J
OYSTER CREEK NUCLEAR GENERATING STATION FORKED RIVER, NEN JERSEY 08731 Abnortal Occurrence Report No. 50-219/74/ 60 IDENTIFICATION Violation of the Technical Specifications, Tabic 3. 1. 1.11. 2,
OF OCCURRE.NCE:
isolation condenser condensate high flow line. break sensor 1B11A2 was found to actuate at a value in excess of the Tech-nical Specification limit of 27 inches !! 0.
2 This event is considered to be an abnormal occurrence as de-fined in the Technical Specifications, paragraph 1.15B.
CONDITIONS PRIOR x
Steady State Power Routine Shutdown TO OCCURRENCE:
llot Standby Operation Cold Shutdown Load Changes During Refueling Shutdown Routine Power Operation Routine Startup Other (Specify)
Operation Power:
Reactor,1903 ?Mt Electric, 665 MWe 4
Flow:
Recirc., 15.3 X 10 gpm 6
Feed., 7.13 X 10 lb/hr Reactor Pressure:
1020 psig Stack Gas:
22,100 pCi/sce DESCRIPTION OF On Friday, Novedber 22, 1974, at approximately 1045, while CCCURRENCE:
perforning routine surveillance testing on the isolation condenser condensate high flow line break sensors, it was ob-served that sensor IB11A2 (located on the A isolation condenser) actuated at a value in excess of the Technical Specification limit of 27 inches !! 0.
Tne complete condensate line break 2
sensor surveillance results 5:ere as follows:
(m..)
(,,)
/
Abnormal.0ccurrence Repc(t No. 50-219/74/60 Page 2 Isolation Condenser A i
Trip Reset Sensor (inches II2 )
(inches if20) 0 1B11A1 27 25 IB11A2 29 25 Isolation Condenser B Trip Reset Sensor (inches !! 0)
(inches II2 )
2 0
IB11B1 26.5 25.5 1B11B2 27 26.5 The IB11A2 sensor was recalibrated and retested. The surveil-larce retest yicided a trippoint of 27 inches 11 0.
2 APPARENT CAUSE Design Procedure OF OCCURRENCE:
Manufacturer Unusual Service Condition Installation /
Inc. Environnental Construction Component Failure Operator x
Other (Specify)
The cause of this occurrence is sensor repeatability which is a recognized problem.
ANALYSIS OF This event is considered to have no safety significance.
Ilad OCCU'IRENCE :
a condensate line high flow condition occurred requiring isolation of the A isolation condenser, the redundant sensor, IB11A1, would have actuated at the Technical Specification limit of 27 inches !! 0.
2 CORRECTIVE Setpoint accuracy and tolerante in not only these instruments ACTION:
but others as well is under investigation by Company and GPU personnel with the General Electric Company.
,n.
(\\
Abnormal Occurrence (,,,/
\\)
Report ?;o. 50-219/74/60 '
Page 3 1
FAILURE DATA:
A previous abnomal occurrence involving these switches was reported in Abnormal Occurrence Report No. 74/23.,
Portinent nanufacturer data:
Type:
Barton Differential Pressure Switch Range: 0-60 inches 1120 Pressure Rating:
1500 psig Serial No.:
IB11A2 - 278-965 l
I l
(
1 l
l l
\\
\\
l Prepared by:
-_x.
\\4:
Date:
11/25/74
- 3.,.,
\\
-.-