05000269/LER-1977-031-03, /03L-0:on 771229,increase in Reactor Coolant Leakage Noted.Caused by Blown Pressure Switch.Transmitter Error Corrected by Recalibr.Switch Temporarily Valved Out, Eliminating Leak
| ML19317E046 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 01/26/1978 |
| From: | Ken Wilson DUKE POWER CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19317E043 | List: |
| References | |
| LER-77-031-03L, LER-77-31-3L, NUDOCS 7912110824 | |
| Download: ML19317E046 (1) | |
| Event date: | |
|---|---|
| Report date: | |
| 2691977031R03 - NRC Website | |
text
..
. =r.c sonu ses 4
u.s.tuctzA:: cecutArcav couuissioN tr m LICENSEE EVENT REPORT EXHlalT A cournot stoex: 1 I
I l
l l e@
I tetzAss Patwr on tves ALL macuinto is.noauariosi i
lo i t l l Sl c 1 N I ele 11 l@l 01 01-10101 010 i O I-1010 l@(4 11 I 11 1111@{
l lg i
e e uca=ne cosa i.
u metan w-na as a
ucu.a ries a
$ > c. r con r lolil E @l 015 10 10 1012] 710 @l i l2 ! ? 1017 37 @ l0f 112 161 718 l @
avant orsemImoN a$o peasa[g":$u'ss" snets @
to1211 On December 27 an increase in reactor coolant leakace was noted.
At 2_131 l
A 1 RPS channel A tripped on press / temp.
It was determined that a pressure g
I o 1. i I switch had blown.
Reactor shutdown was initiated but was terminated when
(
ioIsi! switch was valved out.
On December 29 it was noted that Channel 1 WR io is I oressure was reading high so the channel was tripped.
At 1545 recalibration i
tairlI was comolete so channel was returned to service.
At no time was' the ability ;
i c i. ; I of the reactor to operate safely impaired.
~
- Ees" S$!
su cTe su.c"eSe s"NU co=,casur::ce 171T1 lI IBl @ (E_,,j @ lCl @ II IN! SI TIR IUl@ J. @ (2._Zj @
a u
i L'.%i",e
- G!"**
"'7;'
""4' " '
o ~r vo.
@,,u,,.o l 717 I
(-j l 0 l 31 11 l/l 10 l 3 l.
lL l
[-j
[,0_j c
agt si a
n 2
2.
- s
=
2.
2 u
P M
beQvMS 2:
SU. ITT
- CA B.
p uga uamus aga Ig[2.Zj@
12_l@
lZ l@
l O ! O! O f I
W@
lY l@
lL l@
[M l41515l@
u
.s a
2,
.e
.i 2
2 cAuSE of scRtPT1oN ANo CoARECf1VE ACiloNS tito 1 The ES Analog Channel 1 WR pressure transmitter is located about five feet ii,i, i from and slightly below the blown pressure switch.
It is likely that steam I from the switch struck the transmitter thus throwing it out of calibration.
i,i3, I Recalibration corrected the transmitter error.
Temporarily valving out the i,i.i L switch has eliminated the leak. The trans=1tter was a model 56PH.
i e i
% 8C9'il CTWEM STATUS OtsCC Rv gisCQvf RY CtsemiPTIOM 32 ti ls i W@ l 0 5 0'
l@l NA l
[,,B_j@l Durine nerformance test Pi/l&2/600/p.
e gny,,, g,,,,,
o u
l.IJ L.LI ou re,.envin @ l tocno.e,,un@
A uun@e. su a. l NA
....o ~'.1 n@,eso.n
[
NA l
'a ene..,e, @
.~u....
n..
Li.,nj l 0 I oI Ol@l Z l@l NA J
' '.wie
.'u'..uu?.a
=
ouemme-@
v u.
I'iT l I o 10I Ol@l NA l
1 u
'S"e ** *" *E.'Mo'. "**" @
@ (_Z,,,j@l NA l
i.
,$sy Dt CAJPMcM NAC USE oNLY I 2 I o I L, F.ltei NA i
i iiiiiiiiiiii e
s i.
u u naus on emeramen _
K. R. Wilson (704) 373-8197
,,oy,,
79.12110 M k