View source for 05000366/LER-1981-084-03, /03L-0:on 810903,during Power Increase,High Pressure Coolant Injection Delta P Switch Actuated at Level Outside Tech Specs.Caused by Setpoint Drift.Switch Recalibr. Analog Trip Sys Will Be Installed

{{Adams
| number = ML20011A477
| issue date = 10/01/1981
| title = /03L-0:on 810903,during Power Increase,High Pressure Coolant Injection Delta P Switch Actuated at Level Outside Tech Specs.Caused by Setpoint Drift.Switch Recalibr. Analog Trip Sys Will Be Installed
| author name = Nix R
| author affiliation = GEORGIA POWER CO.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION II)
| docket = 05000366
| license number = 
| contact person = 
| document report number = LER-81-084-03L-01, LER-81-84-3L-1, NUDOCS 8110130465
| package number = ML20011A472
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 2
}}
{{LER
| Title = /03L-0:on 810903,during Power Increase,High Pressure Coolant Injection Delta P Switch Actuated at Level Outside Tech Specs.Caused by Setpoint Drift.Switch Recalibr. Analog Trip Sys Will Be Installed
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000366
| LER year = 1981
| LER number = 84
| LER revision = 3
| Event date = 
| Report date = 
| ENS = 
| abstract = 
}}

=text=
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60 61 DOCK ET NUVBER 68 69 EVENT OATE 74 75 REPORT DATE 80 EVENT oESCRIPTioN AND PROBABLE CONSEQUENCES h [TITI l With the plant increasino power from 238 MWt, 2E41-N005, HPCI Steam Line l
ITTTII Delta P Switch, was found to actuate at +204.5" H2O Delta P.
Tech Specs i
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Tabl( 3.3.2-2 requires actuation at </= +196" Hp0 Del ta P.
Redundant I
[TITl I rwitch 2E41-N004 was operable and in tolerance.
Plant operation or the l
I O l s'l I public's health and safety were not affected.
This is a repetitive event l
1017] I as last reported on Reportable Occurrence Report No. 50-366/1980-141.
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4 47 CAUSE oESCnlPTION AND CORRECTIVE ACTloNs h gl The cause of.this evert has been attributed to setpoint drift.
The instru-l i i I
ment was recalibrated per HNP-2-5202, Barton Model 288A Calibration, and I
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This instrument will be replaced as part of a design I
i 3 l change installing an analog trip system.
A follow-up report will be sub-I i
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=Narrative=
Report for LER 50-366/1981-084.
i On September 3,1981, with Unit II increasing power from 238 MWt, 2E41-N005, High Pressure Coolant Injection Steam Line Differential Pressure ' Switch, was found to actuate at +204.5" water Delta P.
Tech Specs Table 3.3.2-2 requires actuation at </= +196" of water Delta P.
Redundant switch 2E41-N004 was operable and in tolerance.
Plant operation or the public's health and safety were not affected.
This is a repetitive event as last reported on Reportable Occurrence Report No. 50-366/1980-141.
~
The cause of this event has been attributed to setpoint drif t.
The instru-ment was immediately recalibrated per HNP-2-5202, Barton Model 288A Cali-bration, and returned to service. A design change has been submitted to replace this instrument with an analog trip system.
A follow-up report will be submitted upon completion of this corrective action.
Unit I uses this same type of instrument for this application.
A generic review revealed that in this application this type instrument has inherent probl ems.
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