05000366/LER-1980-122-03, /03L-0:on 800811,during Steady State Operation at Full Power,While Performing HNP-2-3001,reactor High Pressure Instrument Test,Switch 2B21-N023C Actuated at 1,068 Psig. Caused by Setpoint Drift.Switch Recalibr

/03L-0:on 800811,during Steady State Operation at Full Power,While Performing HNP-2-3001,reactor High Pressure Instrument Test,Switch 2B21-N023C Actuated at 1,068 Psig. Caused by Setpoint Drift.Switch Recalibr

ML19344E652
Person / Time
Site:	Hatch
Issue date:	08/26/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19344E648	List: 05000366/LER-1980-122, Forwards LER 80-122/03L-0 05000366/LER-1980-122-03, /03L-0:on 800811,during Steady State Operation at Full Power,While Performing HNP-2-3001,reactor High Pressure Instrument Test,Switch 2B21-N023C Actuated at 1,068 Psig. Caused by Setpoint Drift.Switch Recalibr
References
LER-80-122-03L, LER-80-122-3L, NUDOCS 8009020405
Download: ML19344E652 (1)

LER-1980-122, /03L-0:on 800811,during Steady State Operation at Full Power,While Performing HNP-2-3001,reactor High Pressure Instrument Test,Switch 2B21-N023C Actuated at 1,068 Psig. Caused by Setpoint Drift.Switch Recalibr

Event date:
Report date:
3661980122R03 - NRC Website

text

09.6 NLCAH REGULATCnY COP.211SSIOfJ (7 77)

LICENSEE EVENT REPORT coriinot ctocx: 1 I

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(PLE ASE PnifJT on TYPC ALL REOUtHED INFOnf.1ATION)

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t>J C1 DOCK E i NVMt>t H 8J4 69 LVENT GATL 74 7:n f1Ef 04 T DAT E 80 cvcNT orscniP rlON AND PROUARLE CONSCGUENCLO (0) o 2 l Dtaring steady state operation at 100% oower and performing HNP-2-3001, l

[ o ; 3 ].l Reactor liigh Pressure Instrument Test, switch 2021-N023C was found to l

ggj [ actuate at 1068 psig inc.

The Tech Spec limit, Table 4.3.1-1, item 3, l

is $1015 +15.36 psig hccd correction.

No significant occurrences took l

gj l [idTi l i place due to this event. This is not a repetitive event.

Redundant j

jo [7] l switches 2821-N023A, B and D were all operable. There were no effects l

g) l upon public health and safety due to this event.

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0-]Tl L_cer HUP-2-5?79. Barksdele Prc ssure Swi tch Calibratjm_Jt was functinrally.

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[i l ci [ _ tested sucem. full y.

Unit I_also u;nc 'his J r suitch.

A generic re-l [TITl [_ view revealnd no inhorent kroblem.

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and nn furthor repAr_ ting is reguired.

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flARRATIVE REPORT Georgia Poucr Company Plant E.1. lla tch Baxley, Georgia 31513 Reportable Occurrence Report !!o. 50-356/1930-122.

During steady state operation at 100% power and perforraing H1P-2-3001, Reactor liigh Pressure Instrument. Test, reactor pressure switch 2821-k023C was found to actuate at 1068 psig inc.

The Tech Spec limit, Table 4.3.1-1,.

item 3 is $1045 psig increasing -115.36 psig head correction.

The cause of this event was switch setpoint dri f t.

The switch, a Barksdale

!!odel B2T-1112SS, uas recalibrated par H!1p-2-5279, Sarksdale Pressure Switch Calibration.

It was then functionally tested euccessfully per !!:1p-2-3001.

ilo significant occurreacts took place as a result of this event.

This is not a repetitive event on Unit II.

Redundant switches 2321-!!D23A, C and D were all operable.

Unit I also uses this type switch in this application. However e generic review re/ealtd no inherent problet.a.

There were no effccts upon public health and safety due to this event.

The unit is now in full cocapliance with thc recciire;.nnts end rio further reportinD is required.