05000366/LER-1981-053-03, /03L-0:on 810611,turbine First State Pressure Permissive Switches Found Out of Tolerance While Performing Barksdale Pressure Switch Calibr.Probably Caused by Setpoint Drift.Switches Recalibr

/03L-0:on 810611,turbine First State Pressure Permissive Switches Found Out of Tolerance While Performing Barksdale Pressure Switch Calibr.Probably Caused by Setpoint Drift.Switches Recalibr

ML20009F540
Person / Time
Site:	Hatch
Issue date:	07/02/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F537	List: 05000366/LER-1981-053, Forwards LER 81-053/03L-0 05000366/LER-1981-053-03, /03L-0:on 810611,turbine First State Pressure Permissive Switches Found Out of Tolerance While Performing Barksdale Pressure Switch Calibr.Probably Caused by Setpoint Drift.Switches Recalibr
References
LER-81-053-03L, LER-81-53-3L, NUDOCS 8107310283
Download: ML20009F540 (2)

LER-1981-053, /03L-0:on 810611,turbine First State Pressure Permissive Switches Found Out of Tolerance While Performing Barksdale Pressure Switch Calibr.Probably Caused by Setpoint Drift.Switches Recalibr

Event date:
Report date:
3661981053R03 - NRC Website

text

U. S. NUCLEAR REGULATO?.Y COMMif,SION NRC FORM 366 (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

lh (PLEASE I 41NT OR TYPE ALL REQUIRED FWORMATION) e lo l t l l Gl Al El Il Hj 2l@l 0l 0l -l O l 0l O l 010 l - l 01 O l@l 4 l l l 1 l Il ll@l l

l@

7 8 9 LICENSEE CODE 14 15 LICENSE NUMtlE n 26 26 UCENSE TYPE JO 5 7 CA I $8 CON'T IoI11 3E l L j@l 01 S l 0 l 01 01 3 l 6 I 6 l@l 016 l 1 1 1 l 8 l 1 l@l0171Ol218Il l@

/

8 60 61 OOCKET NUMBER 68 69 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PnOBABLE CONSEQUENCES h ITTTI L With the plant in steady state operation at 1927 MWt and while performina I

HNP-2-5279, Barksdale Pressure Switch Calibration, 2C71-N003A,B and C, l

iO i3i l I o 141 l Turbine First State Pressure, Permissive Switches, were found out of tol-l lO isi l erance.

Tech Specs Table 3.3.1-1, Item 9, requires actuation at 160 psig l

10181 l

+12 psig head correction.

Plant operation nor the health and safety of I

l0l7j I the public was affected.

This is a non-repetitive event.

I I

10181 l 7

8 9 DE CODE S BC E COVPONENT CODE SUSC DE S

E IW l. Il. Al@ L.E.lO LE_j @ l I l N l S l T l R l U l@ l Sl@ [__Z_j @

7 8

9 13 11

2 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT R EVISION LER RO EVENT YE AR REPORT NO.

CODE TYPE NO.

O a&P R; l8l1l l---J i 015l3l y

l013 l l Ll

[- _,J l0 l

.,_ 21 22 23 24 26 27 28 29 30 3?

32 T

N AC O ON PL NT VET HOURS S8 iT POR B.

SU PLIE MAN F CTURER I E l@LZJ@

LZJ@

Izl@

101010101 LY_J @

lNl@

lNl@

lBl0l6l9l@,

33 34 3S 36 J/

40 43 42 43 44 47 CAUSE DESCRIPTION AND COARECTIVE ACTIONS h l i 10 l l The cause of this event has been attributed to setonint drift.

The l

I1 liI I switches were recalibrated oer HNP-2-5279 Barksdale Pressure Switch I

I li12i 1 Calibration, and functionally tested successfully oer HNP-2-3010.

I I

ml Turbine First Staae Pressure Permi,ssive Functional Test and Calibration.

I I

t i l41 1 80 7

8 9 ST S

% POWER OTHER STATUS IS O Y

DISCOVERY DESCRIPTION li is ] l El@ l 0 l 7 l 9 l@l NA l

l B l@l Performing normal surveillance.

l ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA l

l NA l

R [_Z_j @ (,,Zj@l PeRSONNet EXPOSURES OeSCRiPriON @

NuM8eR TYPE l1I7llO!0l0l@lZl@l NA l

IES PERSONNE L INJU oESCRiPTiON@

Nuu8ER [1_l,,8,.] l Ol 01 Ol@l NA l

80

- 7 8 9 11 12

'#5 usa ^#0~' ' " " @

^

E

[_119_l (_ Zj@l NA l

80 7

8 9 10 NRC UsE OND iSSuEo OESCF 8107310283 810702 05000366 NA l

lllllllIllIIl5

[.3Lo]L3181 [DRADOCK PDR 88 s,

80 ;

7 8 9 10 I

. M -367-7781 2

/

e LER No.:

50-366/1981-053 Licensee:

Georgia Power Company Facility:

Edwin I. Hatch Docket No. :

50-366

Narrative

Report for LER 50-366/1981-053 On June 11, 1981, while the plant was in steady state operation at 1927 MWt and while performing HNP-2-5279, Barksdale Pressure Switch Calibration, 2C71-N003 A,B and C, Turbine First Stage Pressure Permissive Switches, were found out of tolerance.

Switch 2C71-N003D was found to be operable and actuating within expected tolerance.

Tech Specs Table 3.3.1-1, Item 9, requires actuation at 160 psig + 12 psig head correction.

Plant operation nor the health and safety of the public was affected by this event. This is a non-repetitive event.

The cause of this event has been attributed to setpoint drift.. The switches was recalibrated per HNP-2-5279, Barksdale Pressure Switch Calibration, and functionally tested successfully per HNP-2-3010, Turbine First Stage Pressure Permissive Functional Test and Calibration, and returned to service.

Unit I uses the same type switch -for this application.

A generic review revealed no inherent problems.

i i

I