05000272/LER-2077-048-03, Inoperabilit of No. 12 S/G Level Channel I
| ML19031B051 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 07/19/1977 |
| From: | Librizzi F Public Service Electric & Gas Co |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| LER 1977-048-03 | |
| Download: ML19031B051 (5) | |
| Event date: | |
|---|---|
| Report date: | |
| 2722077048R03 - NRC Website | |
text
Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 Mr. James P. O'Reilly Director of USNRC Office of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. O'Reilly:
LICENSE Nb. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 77-48/03L July 19, 1977 Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 77-48/03L.
This report is required within thirty (30) days of the occurrence.
CC:
Director, Office of Inspection and Enforcement (30 copies)
Director, Office of Management Information and Program Control (3 copies)
The Energy People Sincerely yours,
'7/S F. P. Librizzi General Manager -
Electric Production
(
1 7720:=:0::::::::4 95-2001 300M 10.;
Report Number:
Report Date:
Occurrence Date:
Facility:
77-48/03L 7/13/77 6/26/77 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:
No. 12 Steam Generator Level Channel I Inoperable CONDITIONS PRIOR TO OCCURRENCE:
Reactor tripped from 100% power DESCRIPTION OF OCCURRENCE:
At 1013 hours0.0117 days <br />0.281 hours <br />0.00167 weeks <br />3.854465e-4 months <br />, No. 1 Unit Reactor was tripped from 100% power for the 100% generator trip test.
Following the trip, the No. 12 Steam Gener-ator Channel I failed to alarm on Low-Low Steam Generator Level.* Upon investigation, it was discovered that the level sensor was out of calibration.
The channel was declared inoperable at 1825 hours0.0211 days <br />0.507 hours <br />0.00302 weeks <br />6.944125e-4 months <br /> and the channel was placed in the tripped condition.
Action Statement No. 7 for LCO 3.3.l.l and Action Statement No. 14 for LCO 3.3.2.l were imple-mented.
The sensor was recalibrated and the channel calibration check completed.
No. 12 Steam Generator Level Channel I was declared operable at 1932 hours0.0224 days <br />0.537 hours <br />0.00319 weeks <br />7.35126e-4 months <br /> and Action Statement No. 7 for LCO 3.3.1.1 and Action Statement No. 14 for LCO 3.3.2.l were terminated.
DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:
The level sensor was given an initial rack calibration on 8/20/76.
The scheduled calibrations are performed every 540 days.
However, the level sensor drifted out of calibration prior to its scheduled recalibration.
ANALYSIS OF OCCURRENCE:
Action Statement No. 7 for LCO 3.3.1.1 and Action Statement No. 14 for LCO 3.3.2.1 state that with the number of operable channels one less than the total number of channels, startup and/or power operation may proceed until the 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 />.
No. 12 Steam Generator Level Channel I was 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 /> and remained in that condition until it was returned to service at 1932 hours0.0224 days <br />0.537 hours <br />0.00319 weeks <br />7.35126e-4 months <br /> on 6/26/77, therefore, the LCO's were not violated.
J
{
~ ---:0*
. __,Report No. 77-48/03W 7/13/77
CORRECTIVE ACTION
The level se~sor was identified as being out of calibration and was recalibrated.
FAILURE DATA:
Manufacturer:
ITT Barton Monterey Park, California Model:
386 Output:
4-20 ma output Prepared by T. Spencer
~~~~~-=--~~~~~
Manager 1 ~
Sa em Generating Station SORC Meeting No.
75-77
~~~_;_~__;...~~
LICENSEE EVENT REPORT-LER 77-48/03L 7/13/77 CbNTROL BLOCl<
1.ICENSEE NAME I* I 6
LICENSE NUMBER LIC.E!'ISE TYFE EVENT TYPE
@KJJN1J1s1G1s1~1 Jp101-10101010101.-101gJ**~4lll ll ll l:Jo ~
REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT CATE IOTllcoN'Tl__l_J LIJ LL.I 1015101-101217121 101612161717]
!O l?IJ 13 1711j
~
S7 58 59 60 61 68 69 74 75
EVENT DESCRIPTION
@]JI During 100% Generator Trip Test, No. 12 S/G Level Ch I was declared inopetj-ea due to it failing to trip on the Rx trip. All redundant level chann~ls 7
8 9
@TI] I able 7*
8 9 were 7
8 9 operable.
Ch. I was given a cal check, the sensor was recalibrated
@EJ! and a functional check was completed.
The testing declared the channel 7
89 00
~I operable and Action Statement was terminated.
This is *the 4th occurrence.I 7
8 ;YSTEIYI CAUSC:
co~~b~~NT COMPONENT (77-48/03L) so cooe:
cooe:
COMPONENT COOE SUPPL.IER MANUFACTUREl'l VIOLATION
@TI]1c1c1L.ru IIINISITIR_JQJ
~
IBl018101 lliJ 1
a 9 10 11 12 11 43 44 47 48 CAUSE DESCRIPTION
~(The cause of the level sensor going out of calibration was instrument [ilij 9 7
8 9 00 [lfil 7
e~9~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--'eo FACILITY STATUS o:m lJ2J.
1 a
9 FORM OF
%POWER IO 10 10 I 10 12 METHOD OF OTHEfl STATUS DISCOVERY
'~~-N_f_,A~~__.I L§:.J 13 44 45 ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY (ili]
W
~ I N/A 7
8 9.
10 11 PERSONNEL EXPOSURES NUMBER TYPE
DESCRIPTION
DISCOVERY pESCRIPTION N/A 80
~1010101 LQ.J, NA 7
8 9 11 121
~3,--~~~~-'-~~~~~~~~~~~~~~~~~~~~~~~~~-80.,,-J' PERSONNEL INJURIES NUMBER
DESCRIPTION
ITE11010101 7
8 g 11 N A 12 80 OFFSITE CONSEQUENCES
~'><-~~~~---~~~~-N::.:..<-=A'--~~~~~---~~~---~~~---~~~~~~
LOSS OR DAMAGE TO FACILITY [iliJ lji i°ESCR1PT10N N/A 7
a n10..--~~~~~~~~~-'-~~~~~~~~~~~~--~~~~~~~~~~~~--o1 [ili]
1 a~i~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--100 PHONE: (609)365-iOOO Ext. Salem 528
Rr:c:1vrn 0DCU/'iEJ1T Pi~GCESSJ!-
1G IJJl/T 191.t JUL 27 PM 12 50
~....:-*...:..
.~