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| {{Adams
| | #REDIRECT [[05000366/LER-1981-084-03, N005 HPCI Steam Line Delta P Switch Found to Actuate at 204.5 Inches Water. Caused by Setpoint Drift.Barton Model 288A Switch Recalibr, Tested & Returned to Svc]] |
| | number = ML20011A477
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| | issue date = 10/01/1981
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| | 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
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| | author name = Nix R
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| | author affiliation = GEORGIA POWER CO.
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| | addressee name =
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| | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
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| | docket = 05000366
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| | license number =
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| | contact person =
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| | document report number = LER-81-084-03L-01, LER-81-84-3L-1, NUDOCS 8110130465
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| | package number = ML20011A472
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| | document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
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| | page count = 2
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| }}
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| {{LER
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| | 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
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| | Plant =
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| | Reporting criterion =
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| | Power level =
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| | Mode =
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| | Docket = 05000366
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| | LER year = 1981
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| | LER number = 84
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| | LER revision = 3
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| | Event date =
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| | Report date =
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| | ENS =
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| | abstract =
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| }}
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| =text=
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| LICENSEE EVENT REPORT P
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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
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| ITTTII Delta P Switch, was found to actuate at +204.5" H2O Delta P.
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| Tech Specs i
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| 1014 l [
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| Tabl( 3.3.2-2 requires actuation at </= +196" Hp0 Del ta P.
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| Redundant I
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| [TITl I rwitch 2E41-N004 was operable and in tolerance. | |
| Plant operation or the l
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| I O l s'l I public's health and safety were not affected.
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| This is a repetitive event l
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| 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.
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| The instru-l i i I
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| ment was recalibrated per HNP-2-5202, Barton Model 288A Calibration, and I
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| iii2i l returned to service.
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| This instrument will be replaced as part of a design I
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| i 3 l change installing an analog trip system.
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| A follow-up report will be sub-I i
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| 4 I
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| mitted upon completion of the corrective action.
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| % POWE R OTHER STATUS DIS O Y
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| DISCOVERY CESCRIPTION
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| ==DESCRIPTION==
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| LER No.:' 50-366/1981-084, Licensee: Geo *gia Power Company Fac'il i ty: | |
| Edwin I. Hatch Docket No. : 50-J66 l
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| =Narrative=
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| Report for LER 50-366/1981-084.
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| 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.
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| Tech Specs Table 3.3.2-2 requires actuation at </= +196" of water Delta P.
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| Redundant switch 2E41-N004 was operable and in tolerance.
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| Plant operation or the public's health and safety were not affected.
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| This is a repetitive event as last reported on Reportable Occurrence Report No. 50-366/1980-141.
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| ~
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| The cause of this event has been attributed to setpoint drif t.
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| 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.
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| A follow-up report will be submitted upon completion of this corrective action.
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| Unit I uses this same type of instrument for this application.
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| A generic review revealed that in this application this type instrument has inherent probl ems.
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| {{LER-Nav}}
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