ML20087D975
| ML20087D975 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 06/05/1995 |
| From: | AFFILIATION NOT ASSIGNED |
| To: | |
| References | |
| OLA-3-I-MOSB-38, NUDOCS 9508110253 | |
| Download: ML20087D975 (8) | |
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SEGMENTS 1 AND 2 BRANCH.
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10 11
.MOSBAUGH:
The sequence. that I..was able. to. put -
G 12 together so f ar was that, that they replaced them with' new ones ;and.
13 then we did a normal surveillance I guess and it tripped after.60-14 seconds.
And that time I don't think'the operators got all.the r
15.
alarms the first
- t 16 STOKES:
Well, I didn' t think the local ones did'_
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17 but the guys in the control reom did they, they, found the.same 3
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18 which was the high temperature jacket water, low. turbo,.and low
[r 19 jacket water.
20 MOSBAUGH-Okay.
Then we did another normal right?
21 STOKES:
Yeah.
22 MOSBAUGH:
And.it ran for 60 seconds or so and'then j
23 it tripped again.
Ii 24 STOKES:
Tripped again, 25 MOSBAUGH:
Same -
Now'that ^ne we got different-26 annunciations.
1 27-STOKES:
Dif ferent annunciations, we got I.think uh-28 turbo charger-low pressure, and jacket water low pressure and~then 29 just a high jacket water sensor malfunction.
That's what led us to I
30-think - the -- I thought right off the bat, the darn temperature 31 sensors but then Ken Burr and I were talking about it,-well,' we
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_ji can't really explain the second'one and not having a high jacket l
2 water trip'in, so the only other thing that probably could'have f
3-done it was P3.
4
.MOSBAUGH:
Yeah.
Then we did an emergency after 5
that' y
6 STOKES:
Yeah, and no alarms.
7 MOSBAUGH:
It started and ran, right?
8 STOKES:
Right, with.no alarms.
I 9
MOSBAUGH:
And, what did we do after that?'
10 STOKES:
We did one more normal start.
11 MOSBAUGH:
A normal -- a successful normal' start?
12 STOKES:
Yeah -- no problems.
13 MOSBAUGH:
And what did we do after that?
i 14 STOKES:
Okay.
Then we hed a lot of meetings and
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l 16 MOSBAUGH:
We had a bunch of meetings?
i 17 STOKES:
Yeah.
And then we went out and 18 instrumented the thing with some pressure gauges on each of the e
19 sensors and also on P3.
Jidn't like the things on the pressure.
l 20 gauges, once we started putting them in, because the way they had-
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21 to do it, they ran long lengths of one-quarter inch tygon tubing to 22 make them up, so, you know, our analysis saying well, P,
it takes 23 a while for P to, you know, to charge the lines up, it just added 1
1 24 more tubing.
25 MOSBAUGH:
Half the volume, yeah.
26 STOKES:
Well so, anyway, that's what we saw, it.
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. tripped, We.put that stuff in and it tripped.
But, the pressure.
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gauges never --
p
'3 MOSBAUGH:
What kind of start did you do then?
E 4
STOKES:
Well that was a normal start.
-5 MOSBAUGH:
.A nol.nal start and it-tripped.after 60 6
seconds.
Same type'of' thing?
7 STOKES:
Yeah.
But - no. pressure built up there i
8 (laughing).
It was like fcur, five pounds was all the pressure 9
that built up.
So I was ready to take them off becanoe I figured 10 they had leaks in their fittings or whatever and everybody wanted 1
11 to just go ahead and do one more to see if it built up any'more.
12 So we did that ---
13 MOSBAUGH:
Normal?
14 STOKES:
Yeah, normal, and it did not build up any j
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1 15 more pressure so I had them take them out, uh, we hooked'them up 16 normally, and we left the one in on P3 so we could see what the 17
-pressure'was doing there.
By the way, on the other two, P3 only-18 got up to like to 42, 43 pounds.
It's required ~ [GPC, INT: 50]
19
[NRC: 52] to reset.
So we took those out, left P3 in, and-did a 20.
normal start again and it tripped, slthough that time P3 that time 21 got up to about 47.
We found some sensors that v.ere leaking, minor 22 leak we thought at the time and obviously it must have held some 23 pressure at that time too.
Um, so we did another one and the 24 second one, it was a normal start, and the second one, it worked 25 fine.
There were no trips, there we:e still minor leakage on the 26 sensors. Okay, so we said well maybe it looks like it's P3.
Looks a wpomepwm p,eum immox n 3
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like that may be the' problem.
So, we come back in and called and 2
talked'to them,,and said well final analysis,.we need to make sure
'3 we get an acceptable engine out there so if'they drain all the way j
. 4.
.down I'm saying P3'is out of the circuit when we do an emergency 5
start.. Ok a y'.
6 VOICE:
Right, okay.
7 STOKES:
So we did an emergency start that when the 8
sensors (inaudible).
9 MOSBAUGH:
What, so we did how many, two of those?
10 STOKES:
Two of those.
t 11 MOSBAUGH:
They both failed?
12 STOKES:
They both failed.
13 MOSBAUGH:
Is that the last test run (inaudible).
14 STOKES:
(Inaudible.)
15 MOSBAUGH:
(Inaudible.)
16 STOKES:
I keep (inaudible) we'll get the other two =
17 when we are in an emergency situation like that, you probably would 18 have got them if they were normal starts but if they were emergency 19 situations, you don't allow (inaudible).
It just locks it out.
20 MOSBAUGH:
What was the real -- what was the actual 21 jacket water temperature?
22 STOKES:
Oh, it's a 154, 162, somewhere around 23 there.
24 H '.upones\\itpkense p,curn trut127-EX 38 4
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TR. 13-14
'3-4 The thing that we should have proven, 5
STOKES:
in there though, is that once you get an operable set.[of sensors) 6.
like these'two worked for quite some time, without-7 and it works, i
touching them,..you got, you normally got an operable, a good eng ne 8
9 for a long time.
It's only when, so far, is when these guys take something, I don't know what them out and disturb the system that, 10 I was pretty convinced that
-11 they do to them.
I still don' t know.
12 it was, f rom a long time back, that it was the trash problem because the engine had failures but now I don't know, who's.to say 13' 1
14 -
what it is.
15 MOSBAUGH:
It's hard to say with this set of
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16 information.
17 STOKES:
Involve them with whoever takes these.
18 apart through and (inaudible).
19 MOSBAUGH:
Okay.
Thanks a-lot.
20 L
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.1-SEGMENT #4 2
3 MOSBAUGH:
(GPC: (inaudible)] [ INT: Tom]~(NRC: Tim),
you -have all the -- did you get all the diesel -- do you have the 4
5-
- IIT call and anything?
E 6
HERB BEACHER:
We had it last night.
We called Chaffee.
7 MOSBAUGH:
What all, what all ---
8 HERB BEACHER:
He came back with uh,
" Hum, that's 9
interesting, very interesting, it appears as though maybe uh,'we 10 still don' t know what the root cause is.
However did you guys 11 insure that cleanliness' was uh,
- there, you know the policy 12 cleanliness. You didn' t get (GPC, INT: anything] [NRC: any goop or 13 anything] in there.
And, er, we said we followed the procedure
/O 14 given to us by Wyle.
So what we plan on
- you know -- right now
/( (_)
15 we' re still in (inaudible). so I 'looking forward today for them to 16.
drill us hard as to what went on.
I got copies of the log sheets 17 and stuff.
18 i
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E-1 SEGMENT #5'
.2' Side A, 5%
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4 What was the weather like yesterday?
[
MOSBAUGH:
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'6 MANSFIELD:
Cool.
Real' cool.
MOSBAUGH:
You got this change in' weather.
7 8.
MANSFIELD:
That's right, in fact, it got -- it went.
9 from really hot to really cool windy.
10 MANSFIELD:
It.was cool on March 20.
I Il MOSBAUGH:
It sure was, everybody froze their butts 12 off.
13 MANSFIELD:
Yeah, that's right.
I remember. when I,
14 got-,
15
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