05000321/LER-1981-063-03, /03L-0:on 810630,high Pressure Core Injection Steamline Switch Found to Acutate High.Caused by Setpoint Drift.Switch Recalibr & Returned to Svc

/03L-0:on 810630,high Pressure Core Injection Steamline Switch Found to Acutate High.Caused by Setpoint Drift.Switch Recalibr & Returned to Svc

ML20009E668
Person / Time
Site:	Hatch
Issue date:	07/17/1981
From:	GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009E659	List: 05000321/LER-1981-063, Forwards LER 81-063/03L-0 05000321/LER-1981-063-03, /03L-0:on 810630,high Pressure Core Injection Steamline Switch Found to Acutate High.Caused by Setpoint Drift.Switch Recalibr & Returned to Svc
References
LER-81-063-03L-01, LER-81-63-3L-1, NUDOCS 8107280348
Download: ML20009E668 (2)

LER-1981-063, /03L-0:on 810630,high Pressure Core Injection Steamline Switch Found to Acutate High.Caused by Setpoint Drift.Switch Recalibr & Returned to Svc

Event date:
Report date:
3211981063R03 - NRC Website

text

"

4

... :.; M

~

M 7.o WA UM hi 73.>M m'%

j g 4RC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION P-77 )

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) o li l I e l A I E I I i s I l l@l o l o l 1010 l o l o l o l In l o l@l al il,1,1 l@l I

l@

d 9 LICENSEE CODE 14 f5 LICENSE NUMBER 25 26 LICENSE TYPE J0 57 CAT Sa CON'T G ! tj l L @l 0 l 5 l 0 l 0 l 0 l 3 l 211 @l Ol 61 31 Of 81 1@l0 l 711I 718 l 1 l@

SO RCE 4

60 61 DOCK ET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 CVENT DESCRIPTION AND PROBABLE CONSECUENCES h o ! fl l While the plant was in steady state coeration at 2376 Mit and cerforming i

o !3: I surveillance on HPCI Steam Line aP Instrumentation, 1E41-N005. HPCI l

ojal l Steamline AP Switch, was found to acutate at 243" H 0.

Tech Soecs I

2

.oisi ;

3.2-2, Item 11, recuires actuation at 5+216" HoO - 37" H,o head correction.

I j o j,3 l l Redundant swi tch IE41-N004 wa s opera bl e.

ol a_n_t_onen t ion w.13_ng; a f f oc;pff 1

jaj!l nor was there any effect On the publ ic hea l th a nd

• ,a f tt 2 D1 1 ". l '. a l

t

,oisl l repetitive event as last reported on Reportable occurrence 50-321/1979-102.

I SYSTEM

CAUSE

CAUSE CovP.

VALVE CODE COCE SU8 CODE COMPONENT CODE SU8CCCE SUSCCCE 10191 I I 18 l@ IX l@ l ZI@ l Il Nl S l T-l R l U l@ l 5 l@ 12 l @

9 to it 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT R EVISION LER R EVENT YEAR REPORT NO.

CODE TYPE NO.

@sg;O I 81 Il I-l I01613J kl 10l3l lL l 1-1 l01 a

r

,,, 21 22 23 24 26 27 28 29 30 31 32 T

N A ON ON PL NT MET NOUR$

5 8 i FOR 8.

SLPPLIE VANUF CTLRER LIJ@lz_J@

LlJ@

LIJ@

l 0I of ol of Lv_J@

lat.]@

l N I@

l a I o I a i ol@

33 34 35 36 3/

40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS jiioil The cause of this event was switch setDoint drift.

The Barton AP Switch i

1 li li i i was reca'ibrated and returned to service.

The unit is now in full com-1 l

i,,7i i pliance with the requiremer.ts.

l1 l3l l I

ii i4 11 90 8 9

• POWER OTHER STATUS SCOV RY DISCOVERY OESCRIPTION NA l

l B l@l Surveillance Test l

11 15 l l E l@ l Ol 9l 8!@l ACTiv t T'/

CO TENT LOCATION OF RELEASE aELEASED OF RELEASE AMOUNT OF ACTIVITY l1 l6l hl2 l

NA l

l NA l

7 9 9 10 11 44 45 80 PERSCNNEL EXPOSUR ES 17 ] l 0 l 0 l 0 l@l Z l@OESCRIPT ON NUM8ER TYPE l

NA I

l PERSONNEL INJURIES NUMBER CESCRIPTION li j a t 1010101@l NA l

80 l7 8 9 11 12 LOSS CF OR DAMAGE TO FACILITY Q

'liI9I$@C(($$8Sfo$o00321 NA l

PDR 3a e e w q

.m.,

..r-

~,,m

I LER No. :

50-321/1981-063 Licensee:

Georgia Power Company Facility:

P.lant Edwin I. Hatch Docket No. :

50-321

Narrative

Report for LER 50-321/1981-063 On June 30, 1981, while the plant was in steady state operation and performing surveillance on HPCI Steam Line Differential Pressure (flow)

Instrumentation,1E41-N005, HPCI Steam Line AP Switch, -was found to actuate at 243" H 0.

Tech Specs 3.2-2, Item 11, requires actuation at 5216" H 0 -

2 2

37" H O head correction.

This corresponds to 5300% of normal steam flow.

2 Redundant flow switch 1E41-N004 was operable.

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

This is a repetitive event as last reported on Reportable Occurrence P.eport No. 50-321/1979-102.

T Ll'n The cause of this edent was switch setpoint drift.

The Barton AP Switch was recalibrated and returned to service.

The unit is now in full compliance with the requirements.

This type of Barton AP switch is used in the HPCI and RCIC systems on both units at Plant Hatch. Although several Reportable Occurrences have been written on these instruments, the problem is not believed to be generic in nature.

f 4

e e

i e

f 4

w ey, y ys y--we-