05000272/LER-2077-035-03, Inoperability of Pressurizer Level
| ML19031B053 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 06/02/1977 |
| From: | Librizzi F Public Service Electric & Gas Co |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| LER 1977-035-03 | |
| Download: ML19031B053 (4) | |
| Event date: | |
|---|---|
| Report date: | |
| 2722077035R03 - 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 June 2, 1977 Office of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. O'Reilly:
LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 77-35/03L 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 77-35/03L.
This report is required within thirty (30) days of the occurrence.
Sincerely yours,
~/v(~-f,.,"
Frank P. Libriz91' General Manager -
Electric Production CC Director, Office of Inspection and Enforcement (30 copies)
Director, Office of Management Information and Program Control (3 copies)
The Energy People 95-2001 (400M) 6-76
Report Number:
Report Date:
Occurrence Date:
Facility:
~35/03L 5/20/77 5/7/77 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:
Pressurizer Level Channel I Inoperable CONDITIONS PRIOR TO OCCURRENCE:
Mode 3, Tave 547°F, Pressure 2235 psig DESCRIPTION OF OCCURRENCE:
At 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br />, pressurizer level channel I was declared inoperable due to it reading 3 to 5% higher than other channels.
Pressurizer level channel I was placed in the 'tripped condition.
Action State-ment No. 7 for LCO 3.3.1.1, Table 3.3.1 and Action Statement A for LCO 3.3.2.l were placed in effect.
Power operation continued until 5/18/77 when the unit was taken out of service to repair the channel.
DESIGNATION OF APPARENT* CAUSE OF OCCURRENCE:
Two problems were identified that caused this occurrence.
Gas was trapped in condensate pot causing a false high level signal.
Addi-tionally, the low pressure isolation valve and the equalizing valve were found to be leaking through.
With the equalizing valve leaking through a false differential pressure signal was being applied to the transmitter.
ANALYSIS OF OCCURRENCE:
Action Statement No. 7 for LCO 3.3.1.1 and Action Statement A for LCO 3.3.2.1 allow operation to continue until the next required functional test provided the inoperable channel is placed in the tripped condi-tion within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.
Channel I pressurizer level 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 />, therefore, the LCO was not violated.
The function test for this channel was due on 5/19/77.
At no time was there any danger to the health and safety of the general public or site personnel.
CORRECTIVE ACTION
On 5/18/77, the unit was placed in Mode 2 to facilitate venting of the pressurizer level condensate pot.
The pot was vented and the indica-tion decreased to approximately 3%.
The equalizing valve and low side
Report No. 77-3S/03L *e 5/20/77 isolation valve were replaced and the channel output came to within 2 millivolts of other operable channels.
Channel I was declared operable and all action statements terminated.
FAILURE DATA:
Not Applicable Prepared by T. Spencer
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Manager _I/Salem Generating Station SORC Meeting No. ~~~~~~~~-
57-77
CONTROL BLOCK LICENSEE EVENT REPORT
- 6 77-35/03L 5/7 /77
!_ICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT OATC:
f011l CON'TL_Lj LlJ UJ I 0 I 51 0 I -I 0 I 21 71 21 r--""1 5 7 58 59 60 6,
68 I 0 I 5 I 0 I 7 I 7 I 7 I I 0 I 5 I 2 I 0 j7 I 7j 69 74 75
EVENT DESCRIPTION
~I During Mode 3 operation, Channel I pressurizer level was 7
8 9 declared inopert so
@))!able due to it indicating 3-5% greater than other operable channels.
1 as
@))!Channel I was placed in the tripped condition and Action Statements for 7
8 9 J
J
~ILCO 3.3.1.1 & 3.3.2.1 were implemented.
Condensate pot was vented and 7
8 9
~!equalizing valve was replaced.
(77-35/03L) 7 8 9 SYSTEM
CAUSE
cooE. cooE
@E]LLllLJ
~
7 8 9 10 11 CAUSE DESCRIPTION COMPONENT CODE IX IX IX IX IX..JXJ 12 17 PRIME COMPONENT SUPP!_IER LbJ 43 COMPONENT MANUFACTURER IZ!9i9191 44 47 VIOLATION LBJ 48
@:01 Gas trapped in the condensate pot caused a false high level signal.
~9 l2Jfil I age thru the equalizing valve on the 6P transmitter attributed to the 7
s 9
[!]£]I false level indication.
7 8 9 FACILITY STATUS ITEl LUJ.
1 a
s FORM OF
'!<.POWER IO 10 IO I 10 12 ACTIVITY CONTENT MET HOO OF OTHEfl STATUS DISCOVERY IL:-~N~;_.A~~--.J' l_g,J 13 44 45 01scov*ERY pESCRIPTION N;A I
00 l
so Leal!:-
I BO I
ao so RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE
~ w w
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N__:./_A __
_JI I
NI A I
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s 10 11 44 4'="5:---------'--,;.._-------~oo PERSONNEL EXPOSURES NUMBER TYPE
DESCRIPTION
~1010101 lZJ NA 1
a s 11 12 1b3;-----~<-.,;;..;=---------------------------=:!so PERSONNEL INJURIES NUMBER
DESCRIPTION
GEJIOIOIOI NA 1
a 9 11 12 so OFFSITE CONSEQUENCES
~
NA LOSS OR DAMAGE TO FACILITY G:@l9~i ICESCRIPTION N/A 1
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~10.-----~----_::.;.L....;;..;;..._ _______________________ __,....
PUBLICITY
@iJ 7 8~9------------...U.,<-C~------------------------80~
ADDITIONAL FACTORS II@'n-~~~~~~~~~-N==-~A'--~~~~~~~~~~~~~~~~~~~..,.,i 7
8 9 o::lil~~~~~~~~~~~~~~~~~~~~~~~~~~~~_;_~~~~..;.....J 7
89 00 NAME:
T." L. Snencer
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PHONE: (609) 365-7000 Ext. Salem 628 J