05000366/LER-1978-081-03, /03L-0 on 781210:noted That 2B21-N017C Tripped at 37.7 Inches of Water Decreasing.Caused by Instru Drift

/03L-0 on 781210:noted That 2B21-N017C Tripped at 37.7 Inches of Water Decreasing.Caused by Instru Drift

ML20147H478
Person / Time
Site:	Hatch
Issue date:	12/20/1978
From:	Nix R GEORGIA POWER CO.
To:
Shared Package
ML20147H477	List: 05000366/LER-1978-081, Forwards LER 78-081/03L-0 05000366/LER-1978-081-03, /03L-0 on 781210:noted That 2B21-N017C Tripped at 37.7 Inches of Water Decreasing.Caused by Instru Drift
References
LER-78-081-03L-01, LER-78-81-3L-1, NUDOCS 7812270273
Download: ML20147H478 (1)

LER-1978-081, /03L-0 on 781210:noted That 2B21-N017C Tripped at 37.7 Inches of Water Decreasing.Caused by Instru Drift

Event date:
Report date:
3661978081R03 - NRC Website

text

LICLNSLL LVLNI HLPOHT INIHOL tjtock:

l

.l l

l l

l@

(PLEASE PnlNT On TYPE alt.nEOUinED INFOnMATION)

AI.Tl Il til 2l@l Ol 01010l 0l 0] 01 Ol 0l 0l 0j@l4 l1lll1l1l@l l

l@

8 9

LICENJLL E. Opt 14 lb LIClinL NUMitL H 2'J 26 LiCLNSL lyPL JO bl LA T b6

.r

]

$aljlLl@l0] 5l010l0l3l616V~Ql1 12 11 10l7]8]@l1l2l2l0l718l@

8 44) til DOCKl t ieUMdE rl t =1 kl LVENT OATE 14 13 HLPOJ4TDAIL tiO tVEnr OLScalPTION AND PnODAflLE CONSLOUENCES h l With the reactor in the Run mode, while performing HNP-2-3003 (Reactor Water Level.

I g

i' l RPS & PCIS, F.T. & C.), 2B21-fl017C was f ound to trip a t 37.7 inches of water l

I decreasing. This f ails to comply with Technical Specification Table 3.3.2-2. There l

0l were no effects to public health or safe plant operation as 2B21-fl017A was operable l D l at the time.

1 0t I

OI I

8 9 80 DE ODE SUICO E COMPONENT CODE SU9 CODE S

E D

I C I Al@ lx l@ LZj@ l 1 l _tll S i T l R i u l@ g@ g @

8 9

to 11 12 13 18 19 20 SE QUENTI AL OCCURRENCE REPORT REVISION tnR f VENT YE AR REPORTtJO.

CODE TYPE O,aj,g,O 17181 l_;

l 0 I 81 1l y

l q3l O

g [N

r,

_2B 22 23 24 26 27 N

7J 30 31 32 Sei1 FOR 4 8.

SU P MAN Lt ACT P O PL tT II HOURS 22 h

lNlg lNlg [b'Elg lBj[]lu'jCTtiEFblg [E jgl34Zlg l5 Z lg l36Z l@l 0l 0l 0l l

JJ_

3 3/

40 di 42 43 44 47 CAUSE DESCalPTION AND CONNECTIVE ACTIONS h g { The cause has been attributed to instrument drif t. The instrument was recalibrated i

gl per procedure HNP-2-5202 and procedure liflP-2-3003 was completed satisfactorily.

I gl 2B21-fl017C is a Barton Model 288A switch.

[

0l I

al I

8 0 80

$1A 5

%8'OWtn OTH ER S TATUS DIS FY 01NOV RY OESCRIPTION yW @ l0lSj1l@l_

l l Bl@l Surveillance Test (ing l

NA ACilVl1Y cot IE N T AMOUNTOF ACTIVirY @ l LOCATION OF RELEASE @

- lnrir AstO OF nH f ASELZ_j @ [_ljgl NA l

NA l

' ' censos%ttixPOsu,'ics OcSCniP riON @

Nunaen Tvec 0l0l0l0l@lZl@l NA l

' U rrnsOut t iulu'iiics orsCnirTiON@ NA aUvorn 011010101@l l

8 0 11 11 So (055 OF Of t DAuAGE 10 F ACluTY 14PE DisDtaPitON LZJ@l N^

l DLal@E'?cm,,,0~@

781227 @73 1UT"""

nnc usE ONLY 1

l NA I

llllIlllll11II O o 0

ce so c0 ;

M1M 367-7781 NAME Or PHEPAntit -

R_ T. nix pgogg:

Superintendent of Maintenance