05000250/LER-1979-014-03, /03L-0 on 790424:ready to Start Light on B Emergency Diesel Generator Engine Control Panel Failed. Caused by Vibration of Lamp Socket.Tests Under Way to Determine If Neon Unit Would Be Better Suited

From kanterella
(Redirected from ML19259C092)
Jump to navigation Jump to search
/03L-0 on 790424:ready to Start Light on B Emergency Diesel Generator Engine Control Panel Failed. Caused by Vibration of Lamp Socket.Tests Under Way to Determine If Neon Unit Would Be Better Suited
ML19259C092
Person / Time
Site: Turkey Point NextEra Energy icon.png
Issue date: 05/24/1979
From: James D
FLORIDA POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19259C085 List:
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7906120344
Download: ML19259C092 (2)


LER-1979-014, /03L-0 on 790424:ready to Start Light on B Emergency Diesel Generator Engine Control Panel Failed. Caused by Vibration of Lamp Socket.Tests Under Way to Determine If Neon Unit Would Be Better Suited
Event date:
Report date:
2501979014R03 - NRC Website

text

e.

NRC WOR Ae 364 (7 774 U. S. NUCL E AA AICULATQ4 y CCAtr.al13 TON LICENSEE EVENT REPORT Cosrect.si.ccci I l l l I

ietsase camr on Tvec aLL accusato inacavariera i

foT 1 l FiL ITI PIS i3l@l0 10l-10 101 010 0 l-l0 l0 G( 411 11l1[1(@[_ t lg vea,u,ca;.

a oca s.. -..

p

..w.a n,,

.. -..4 CCN'T O'*," QQt O t510 l 0 o 1215f 0@f of 4 21417 l 9 '@l0 f 512141719 l@.

a i

t i

8 s

to e,

oocsstsuvsse w

6e av amr ca r a 7

6 agroa r aara ao tvtr.T 045CRIPriON 440 **0843LE COx3tcutNC13 rTTp I During power operation, the "re y to start" light on the B Emergency Diesel l 5 m i enerator (EDG) engine control panel failed. An investigation revealed G

i r7m, that when the lamp was being replaced, the socket turned and shorted. its g leads resulting in a blom fuse which disabled the 125v Dc supply and thus 3

the ability to start the B EDC.

The diesel was tested and returned to i

f7TD i servies within 3 hrs. The redundant A EDG was available to supply ESF t

, equipment as described in FSAR Section 8.

,3,,

$J [E l E l@ g@ y@ l IlN I S lT [R I U[@ g@ $N[heg@

c 04 Coot 53 4

C0**0wf 4f :C39 Sust c's (Trs]

b

'O In 12

'J 18 nd 24

<,...o Tvc.rvs..

t.a.a,va g r.4.&

Occu9 m,i.wct a tso,.f Alv'1som or..

coo tv.

,o.

6J.pJ;

'=4'N '.%_I,,719 I t-J 10 Ii ! 41 Ld 10 l3I IL I l, -J LOJ u

n aa u

u

.a

s e'36cr
  • %=%~

pu@{Fj@

(ZJ@

L.2J O I0 1 01 O @R I L.L. l@

I N[@

[Aj @ 'LXr9 19 l9ig

  • WM;n'.u*& 'i'2.s=?u'-

4 5" c'lu'.',,

,ou s e

.2 u

u n

1 g l The most probable cause of th@o failure was vibration of the lamp sock C.suse ossCuricN ano Coaneenve ACrious r

g i resulting in it becoming ' free to tum in the panel. A special test is-

, underway to deternine ".f a neon unit (base-lamp combination) would be l better suited for this application.

3 l

i t

7 4 9

'g'[2 g

growse O rMEA STa rus 5.5[3 i

Disc 3vf4v OE5c*ia, 01 i s i gj@ li 1010 l@[_

NA l [_A'@l Operator observatior.

l x,,,,

~

~

,,ov~r geriv n y3 tocaricw antir a

,,...,_.,.m...

wi.wsta tv,1 o semieri i O!O i 0 l@LZj@L i

r I

<.,n c.. L',m ',',,2anc...r.

s@

w I 01010i@(

NA I

n W,',*' ** lL'l' h'.2 "c'"" @

n il>

[Zj@l NA j f 1y L

l l

n avauce v g W;i. 3@l*,(ggn:pr.cq 3

W USI c*.LY NA

'a sa sF

.3 NAUTQS.e(3Agga D.

K. Janes ge,:g, (305) 552-3830 7 9 0 612,0 3P(

l

REPORTABLE OCCURRENCE 250-79-14 LICDTSEE ETaIT REPORT PAGE TWO Additional Event Descrintion and Probable Consequences:

Comoonent Data:

Sockets Drake 754-125V B147sL-1BE 2284 223 O

r

  • 4