ML20038A087

From kanterella
Jump to navigation Jump to search
RO 76-15:on 760630,during Cold Shutdown,Station Battery Charger Failed & Load on Battery Reduced Voltage to 120 Volts.Caused by Defective Silicon Rectifiers.Charger Replaced,Repaired & Returned to Svc
ML20038A087
Person / Time
Site: Big Rock Point File:Consumers Energy icon.png
Issue date: 07/30/1976
From:
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
RO-76-15, NUDOCS 8110060032
Download: ML20038A087 (1)


Text

m:

n

,.. w.

~

.a x

s;m:guve g tcy.:

96

q

.i s E. m a.g o;~g us,s wsu,s.v.s e.cr y n. 5 L e n..,c; e rn.

% conTam..Locolol /1519.It/m?

9,,9. c;g.,;g i,

.sp

.,2 c d. -n>.

e

.. ~,

.w 18 i casa s raussamano.wasmannear m,_

a az u.

1.,

u,,,,

m.,,

~

  • asaang -

1+

.. >.i,.... s e LCassat asuueest Evet

.~

e-m TvPE u111 ala l P l 1l"l0 l0 Nl'0l0 l'0l 0 l 0i-l 0 lf0l jl h l'1'l 1l 1l 1j' g o-25,

30. 31.

,,2 25 7 89 14 15 s

, OOCur No

. m d 0.n 0 r,un

'"A"'

E"vll';

[oBeoNi l i

1. l1J LtJ.- lo i s I ol-1 o l il~. i sl~ l o l 6111017161. folvi'lal'I'l s

7 6 S7. 58 SS 60 81 66 69 74 75 48 0

'r_.

,. h.

~

EVENT DESCRPTON l

y l Station battery charger failed and load on battery reduced voltage to about 120 W.

A 7 89

~

@ l volts and specifie stravity to an averake'of 1.175 on 7/1/~r6. arm Nwa-vn I

s,.

e 7 0g

~

80 Q l replaced with a. spare unit on.7/1/76. The original charger was repaired and l

80 7 89 l returned to service and an equalizing charge restored specific gravity to '>1.200 l

o3 80 7 89 g en 7/k/76. Event occurr-d during cold shutdown. RO-15-76 l

90 7 89 m

' 7, g,4 N'6*'

CD*a0*dhi (napoMw?

sysit u Caust CCDE CODE CouaONENr COOg sten emuaHC7WR woLarom Q lEl C] y l Bl Al Tl TlR lY l W

lE l3 l5 l 5 {

[Hj 7 89 10 11 1;f 17 43 44 47 4d CAUSE DESCRIFTON Th'.s is the first failure of the j

[Defectivesiliconrectifierswerereplaced.

e 60 7 89 l

Q [ unit which has been in service approxi=ately two years.

60 7 89 l

1O l 7 8S

-,1 00 0,

..C.,v status

% POVbte OTM A STATUS Dr56.Ovtav OGCOwirf OfSCFFTCN n

Lc_l lo I oI 01 I N/A I LA.J l

N/A I

7 8 9

10 12 13 44 45 46 80 sos.w os AG? vivy CONffNT auGUhi OF ACTfvffy LOCATCN OF RCLt&SE 08 AEL' ASE l N/A J

[

N/A i

EE L U SED

[;j

[-j i2 7 8 9

60 11 44 db 60 PERSONNEL EXPOSURES Nuwata v est otscneroN

@ l 0l 0l Cl yl N/A l

60 7 99 12 13 PERSONNEL INJURES puwwa c(scperom lClOl0] l N/A l

i.2 60 7 89 11 12 PROBABLE CONSEQUENCES Q l None, since the plant vu. in cold shutdown condition.

l 60 7 89 LCSS DA CAMAGE TO FACIUTY tvet OtsCnevo,e hbI N/A e0 7 8e to PUBLICITY n/A 1

gi 60 7 89 ADDITONAL i ACTCRS U/A j

1e l 7 89 80 l

8I OO 7 83 f y&)

g;, x.+ y;
pr=e...m n.. Wh..,.,,. C,QQJgG. hiIQQ'; y; R "l"W

.,I

- QLj ^ y '

h(.[ ,;*G % 31l{-

y.,

s Mg %.&.W!

- _. 5.0::w.l b. MW.c "y vm -n p, a y,a.gp.,., ::p.: vsy -

2 w'

  • .,r.

& 9..

1

> p>

. x,s.

w..u w:

u.

_: 1

a. e

+_ _

v_.

8110060032 760730 1 m

PDR ADOCK 05000155' g ~~

S PDR'

-m. m.

h a

76-/5

=

/C1Ti O

l

...