ML20099L388

Intervenor Exhibit I-MOSBA-23A,consisting of Transcipt Re Intervenor Exhibit 23A Tape 29 Side B,

ML20099L388
Person / Time
Site:	Vogtle
Issue date:	10/06/1995
From:	AFFILIATION NOT ASSIGNED
To:
References
OLA-3-I-MOS-23A, NUDOCS 9512280215
Download: ML20099L388 (5)

Text

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T-MDSf3 A - 2 3 6 00CKETED USNRC

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INT. zXH. 23

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95 0CT 20 P5 :09 Date: 4-3-90 3

(NOT YET AGREED TO BY INTERVENOR 4

NRC A!HrGiMSGY A40WEfv 4NSERT 5

j 3ri! N vendor test (inaudible) and 6

pdF1 ' q ygHi'ykinaudible)

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7 basically the sensor did not re:.11y show any great sensitivity, 8

I mean, they beat it around and all this claim, right?

9 you know, a bit and it was fairly reproducible and the'only problem was 10 looks like somebody may have had a factory assembly problem 11 that 12 with this shaft.

VO!CE:

Okay.

It wasn't Tight.

It didn't tighten up 13 14 (inaudible).

MOSBAUGH:

Yeah. Right.

It sounded like somebody, 15 16 either lock-tight didn't work or it wasn't, you know, assembled under poor conditions or whatever and the shaft was on loose.

7 18 That would explain that one switch's problem.

(Inaudible) 19 prcblem.

VOICE:

(inaudible) I was wondering any of those 20 21 switches are (inaudible).

That's one of those inspections you'll have do VOICE:

22 i

all over (inaudible).

23 MOSBAUGH:

Yup.

Is that the root cause.

24 The problem is, we don't have VOICE:

You know Allen.

25 a problem with the diesel run only the 18 month (inaudible).

26 We have a trend of the problem --

Look at the trend we have.

27 immediately after calibration.

28 VOICE:

Right.

29 to resolve.

VOICE:

That's what Briney has got 30 l

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NUCLEAR REGULATORY COMMISSION EXHIBITNO.% N$

DocketNo _50-424/425-OLA-3 in the matar of_Georale Ps-Co et al Voatie Unita 1 & 2

['[Irdervenor O Other 9512280215 951006 O Staff O APPh t PDR O identified Receive.d O Rejected Reporter _ Cp PDR ADOCK 05000424 T

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1 VOICE:

That's right.

I mean --

2 VOICE:

Well --

3 VOICE:

He-doesn't like the fact that his handling of 4

these instruments is involved in this problem.

But the facts 5

clearly show that it starts reliably during -- between outages 6

and when we go in and do work on them we have protlems 7

immediately after that or (inaudible) problems with calibration 8

(inaudible).

9 VOICE:

That's what the problec. is, you know --

T 10 VOICE:

George picked up on that real quick.

l 11 VOICE:

I mean, you can see -- look at the (inaudible) 12 when these problems happen -- 18 months its pretty clean and then i

13 immediately the problem right after the calibration.

14 MOSBAUGH:

You know --

l 15 VOICE:

(inaudible) it's not that straight forward.

16 MOSBAUGH:

You know you have take th,at with -- in l

17 context.

You know, frequently when you don't touch the equipment j

18 you don't have much maintenance record okay when you start 19 handling the equipment and doing things with equipment then all I

20 of the sudden there is maintenance record and, you know, in the j

i 21 MWO system.

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22 Does that mean that your maintenance is causing that or i

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23 does that merely mean --

24 VOICE:

No.

You see we are basically doing the same 25 test every month.

I mean like we start the diesel, run it 100%

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I mean shut down the engine, we never trip 1

power and trip it 2

the engine because (inaudible) parameters, you know.

VOICE:

Yeah.

3 VOICE:

We trip the engine (inaudible).

4 We are doing the same thing after the test 5

Does that mean we're (inaudible) for the VOICE:

Oops.

6 7

9:00 --

That's in George's office.

VOICE:

8 MOSBAUGH:

-- phone call.

Okay.

9 I'll need to head over there.

10

[ break -- walking sounds) 11 12 13 3

.e e

e I don't think we had a trip when we started that 9

BURR:

1-

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2

engine, j

HOLMES:

That's right.

3 We did not have a trip.

And as you started it t

BURR:

4 it timed out at the end of 70 seconds everything was normal and i

5 then 10 seconds later our trip came in.

6 I

You are sayino the temperature went up.

HOLMES:

f 7

to don't know what time that is.

We got to trend that and we got in order to say and that's why we f

B r

9 know these other numbers, too, 80 seconds.

f that's why the engine tripped at 10 tripped at 80, And then at the second start it was already 1

BURR:

11-the end 70 seconds when it timed out and down it went.

12

' tripped at i

Let me tell everybody my feeling at this BOCKHOLD:

13 My feeling is that we have the current best postulated 14 point.

start was that potentially a way.the engine tripped on the first 15 i

higher temperature than the normal running temperature of jacket 16 After a period water was seen by the temperature switches, okay.

17 failure of one so it of time and because we had an intermittent 18 was venting and we had a potential calibration problem with one 19 thus the trip.

Today we believe that 20 or more of the other ones, we don't have the calibration is correct with the new switches, 21 We are going to do a test that will prove or 22 that problem today.

t t

23 disprove this theory.

[ pause in discussion]

24 f

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1 BOCKHOLD:

Are the diesels still operable?

Yes, all 2

four diesels are'still operable.

We asked that every time we 3

went to the NRC.

4 HORTON:

(Inaudible)-

5 HOLMES:

What difference in the way that the calibrated 6

sensors that resulted in --

7 BOCKHOLD:

The calibration, sensor calibration this 8

time was done with close scrutiny, and (inaudible) I think much 9

more consistent sensor calibration.

I mean, you could 10 (inaudible) in the response there was a lot of real close 11 (inaudible) by a lot of people.

12 BURR:

One thing other that_ supports this high 13 temperature jacket water theory is the switches that were taken 14 out at the outage, the as-found data on those switches, they were 15 found to be at 210 degrees.

The reason they didn't trip was 16 because they were calibrated higher.

Now you set them back down 17 to where they are supposed to be.

And now we have a tripping 18 problem.

19 KOCHERY:

Do we have the copy of the (inaudible) data?

20 21 22 23

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