05000321/LER-1981-001-01, /01T-0:on 801228,HPCI Steam Line Pressure Switches 1E41-N001a,c,d Actuated Outside Tech Specs.Caused by Switch Setpoint Drift.Switches Recalibr

/01T-0:on 801228,HPCI Steam Line Pressure Switches 1E41-N001a,c,d Actuated Outside Tech Specs.Caused by Switch Setpoint Drift.Switches Recalibr

ML20002E225
Person / Time
Site:	Hatch
Issue date:	01/15/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20002E181	List: 05000321/LER-1981-001, Forwards LER 81-001/01T-0 05000321/LER-1981-001-01, /01T-0:on 801228,HPCI Steam Line Pressure Switches 1E41-N001a,c,d Actuated Outside Tech Specs.Caused by Switch Setpoint Drift.Switches Recalibr
References
LER-81-001-01T, LER-81-1-1T, NUDOCS 8101260688
Download: ML20002E225 (2)

LER-1981-001, /01T-0:on 801228,HPCI Steam Line Pressure Switches 1E41-N001a,c,d Actuated Outside Tech Specs.Caused by Switch Setpoint Drift.Switches Recalibr

Event date:
Report date:
3211981001R01 - NRC Website

text

n.m LICENSEE EVENT REPORT

[

CONTROL BLOCK: l l

l l

l l lh (F* EASE PRINT CR TYPE ALL CEEUIKED INFORMATION) ks/

I 6

lGlAlElIlHl 1 l@l 0 l 0 l - l 0 l 0 l 0 l 0 l 0 l-l 0 l 0 l@l 4 l1 l 1 l 1 l 1 l@l l

l@

0 1 7

8 9 LICENSEE CODE 14 15 LICENSE NUMBEM 25 26 LICENSE TYPE JO

$7 CAT 58 S$"CE l L l@l 0 l 5 J 01010 l 3 [2 l1 ]@l 0 l1 l 0 l 5 lI8l1l@l011l1151811l@

7 8

60 61 DOCKET NUMBER tm 6w

$YU T";ATS 74 lb REPQHT DATE 80 EVENT DESCRIPTION AND pro 8ABLE CONSEQUENCES h O 2 I On December 28, 1980, at steady state operation at 1885 fMt, HPCI Steam l

0 3 l Line Pressure Switches 1E41-N001a,c,d actuated at 104, 105 and 102.5 psig re-l 0 4 l

spectively. Tc,h Specs 3.2-2, Item 10 requires actuation 2100 psig +7.3 l

O s I psig static nead. Failure was not promptly reported as required by Tech l

IO is i I Spec Section 6.9.1.8.e.

Redundant ECCS systems were all operable. Plant i

O 7 l operation nor the health and safety of the public was not affected. This l

O la i I is a repetitive event as last reported on R0 50-321/1980-114.

I 80 7

8 9 E

CODE S BCO E COMPONENT CODE SU8 CODE SU E

l Il B l@ [X_j@ W@ l Il Nl Sl Tl Rl Ul@ W@ @ @

7 8

9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LE R EVENT YE AR REPORT NO.

CODE TYPE NO.

O,ag/RO 18 l1 l

[_j l0 l0 l1 l y

l 0l 1l g

g

[ 0j

_ 21 22 23 24 26 27 N

M 30 31 32,

KN AC 0 ON PL NT M

HOURS SB IT D FOR B.

SUPPLIE MANUFAC U (V]

[EjglJ4Z lg l35Z[g g@

[ 0 l 0l 0l 0l g g l Nl g [N j g l B l 0 l6 "lE0 l g 33_

36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O I The cause of the event was switch setpoint drift.

The Barksdale Pressure l

li lil l Switches were recalibrated immediately upon discovery on December 28, 1980, I

i 2 l and returned to service.

Personnel were re-instructed to submit deviations I

gl promptly.

A design change request has been initiated to replace the switches l

EI with an analog trip system.

l STlSV C

% POWER OTHER STATUS dis O Y

DISCOVERY DESCRIPTION li 15 l W@ l0 l 0 l 0 l@l NA l

[B_J@l Surveillance test l

A TlVITY CO TENT r,ELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE W @ W@l NA l

l NA l

l t s PERSONNEL EXPOS ES NUMBER TYPE

DESCRIPTION

[TTT110l 01 Ol@l 21@l NA l

PERSON *Jf L INJURIES NUMBER DESCRtPTION ITTil I 0l 0l 01@l NA l

7 8 9 11 12 80 kI Zl@l TYPE CESCR PT ON NA i

7 6 tr 10 1,0 ISSUuE @DESCRIPTIGN 60 63 l'c 7, L

L NA I li ll i t i ri t ii li 2 a 1

8 &

60

'9 I 2' ' N 71778I FF:UNE:

NAMF OF PREPARER -

R1012 6 0 tog,3

N 5

- f)

LER No. : 50-32k/1981-001 v

Licensee: Georgia Power Comp'ny a

Facility: Edwin I. Hatch Docket No.: 50-321

Narrative

Report for LER 50-321/1981-001 On December 28, 1980, with the unit in steady state operation at 1885 etat, HPCI Steam Line Pressure Switches,1E41-N001 A,'C, 0 actuated at 104, 105 and 102.5 psig respectively. Tech Specs table 3.2-2, Item 10, requires actuation of 2100 psig +7.3 psig static head.

Failure of the switches was not reported promptly as required per Tech Spec Section 6.9.1.8.e.

When j

the event was discovered on January 5, 1981, deviations were reported on the failure of the switches and also the failure to report them promptly.

At the time of the event, redundant ECCS systems, RICI, ADS, LPCI and Core Spray were all operable.

Plant operation was not affected. The safety and health of the public was not affected.

This event is repetitive as last reported on LER No. 50-321/1980-114.

The cause of the event was switch setpoint drift.

The Barksdale Pressure Switches were re-calibrated immediately upon discovery of the failure on December 28, 1980 and returned to service.

Personnel were re-instructed Q

to submit deviations promptly.

A generic review revealed no inherent problems. A design change request has been initiated to replace these switches with an Analog Trip System.

This type switch is used in this application on Unit II.

Unit II is presently in refueling and these switches will be checked prior to start-up.

L 2

v a