05000333/LER-1980-056-03, /03X-1:on 800610,emergency Diesel Generator C Tripped on High Circulating Current.Caused by High Resistance Contacts on Regulatory Droop Switch.Switches Replaced

/03X-1:on 800610,emergency Diesel Generator C Tripped on High Circulating Current.Caused by High Resistance Contacts on Regulatory Droop Switch.Switches Replaced

ML20003B002
Person / Time
Site:	FitzPatrick
Issue date:	02/02/1981
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003A958	List:
References
LER-80-056-03X, LER-80-56-3X, NUDOCS 8102100186
Download: ML20003B002 (1)

LER-1980-056, /03X-1:on 800610,emergency Diesel Generator C Tripped on High Circulating Current.Caused by High Resistance Contacts on Regulatory Droop Switch.Switches Replaced

Event date:
Report date:
3331980056R03 - NRC Website

text

,.

Nec new ou u. s. nucLEAn nEcuLArcav cewissic.n 0 77)

LICENSEE EVENT REPORT e@

c0NTack stock: l I

I I

I I

l (PLEASE PRINT CA TYPE ALL AEcGIRED INFCR4tATICN) i lo t i l l N i y I J l A l F l l I@l 0 lo I-lo 10 10 lo I l O ! 01 Ol@l f. I t l i l il t l@ll? GAT $4 @

l l

7 8 9 UCENSagC :t le

S 6aCEN$tN W ete

S 24 6.:ENSE ?v81 40 CON **

fotil

,"c"J l t @l o i s t o l o lo 1313 13 T@l o s 6 11 ol 8101@l 01 21 ol 21 81 Il@

m.. ?,.....

..NT:.1,

...:. ? ;.,

EVENT OE!CAIPDCN ANO PRCB AsLE 00NSE0VENCES h lo ':i f Ourine nor-al shutdown and durine surveillance testinc. 'olicwine rout'ne t.. 2, I creventive maintenance work E ercencv Diesel Generator C trieced on hich 1

l I !41 I circulatine current.

Sunsecuent tests could act duelicate "e ernble -

4 t'"'" Q l The other EDG system was osernble -eeting TS 1.0.0 r.eutra-aart.

TS n evaar I

3.s.yt I

i: >6 I I afd

- m

.e.,e 3 e t a m f at..

wm, a

.m

.w.

mhtte L.a.w

.s l: t?i l I

a

,.is i

43 g 3 Sys?tv CAL 5f CA sf

• .?

• va.vt i

E

t 3680004

v7:N(*.? :::t Sus:::t 5.t* :t I:')I I El Elh Idh L.Ajh l Cl i<! Tl BI Al K!h dh lj h 2

8 9

tJ 15 12

'2 1

is U:wIsn AL 000.a e t %:t aae m?

a gy.35c N e *C a? %=,

g

?s eg s,

ga aC

.b!NT'taa s

O f 5,m; laiof I-!

I of ci el IA I ci il

! xi 11 Iil

_:n a

2 u

a a

Ac* % s;*.sg gest:-

sw.*:34 2.

ac..sgst see:.s est st ::..a

.e:=4gs?

?AstN a:?::%

04 8bA %?

'J E T-::

m:V R $

Sy3Va??t:

808U a.&.

Se P8L. g a WNL f J

• .2 E R i zi6h i of 0: o i. NirEp I N ir A.

I N i ':h I 01 71 71 016._

i c iot z itte i. Z vd.

m 4

L w.. y 2

.i E50 PIP 10N AND COAAECTiv! AOBCNS h OA.sf :

ia,1 The cause was due to hich resistance contacts on the reculatorv droco switch I

t...iI resulting in trio. This determination was made following a recurrence on 1/6/81 1

9 i,,, I (See LER 81-004).

Switches were reolaced.

No additional action is recuired.

i l,.1 I I

ii.i I S 1 SC sa:n *v

>t3 0- *s s? ah,5

%7:wga

=?.geg?2?;g Cis =N t = '

0'!:N ERV *ti:7 * : 4 OI I' 4 5 i

!ddd NA l

Su rve l l I 3n ce l

3 1 11 44 d5 4

1:

A -*vi*v

N!!NT

(~.

aucu.sr :p 2: ivi v (Q-)

s: 2?i=a. e : 22: @

i s t L;j @: -= L.;!@l

. Leist at. rest N:

1 I

3 i-1 5 3

?:

it 44 85 gJ etas wg; goesusts syvgaa

• vet

ts:mie*i:N W l'i *I lOl0!O f E!

NA l

5 3

• t 1:

13 tJ egas:wg;,ggs g3 Nt.veta

ts:p s**

l Na I

• Ia1 ! *, i 9 i L :: :,* :ROAV4:1 ?: #A :Liiv

• ve.

0410As* ON l'i?I lI

'. l NA a e s.;

og g g : ?y

ys:ml:ts:=:p*::s -

7*,C

SgCNL, g

i??16 NA

!IIf 'IIII' l*,

l f

{

4-)

l 7

4 3

'4 63 de 3: :