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

-

T- MDSf3 A - 2 3 6

' 00CKETED USNRC INT. zXH. 23 [h %;W b 1 m z 29, sID s 2 95 0CT 20 P5 :09 Date: 4-3-90 3

4 (NOT YET AGREED TO BY INTERVENOR 5 NRC A!HrGiMSGY A40WEfv 4NSERT j 3ri! N pdF1 ' q ygHi'ykinaudible) 6 M$ vendor test (inaudible) and 7

8 basically the sensor did not re:.11y show any great sensitivity, I mean, they beat it around 9 you know, and all this claim, right? '

10 a bit and it was fairly reproducible and the'only problem was that looks like somebody may have had a factory assembly problem 11 12 with this shaft. It didn't tighten up Okay. It wasn't Tight.

13 VO!CE:

14 (inaudible).

Yeah. Right. It sounded like somebody, 15 MOSBAUGH:

16 either lock-tight didn't work or it wasn't, you know, assembled

7 under poor conditions or whatever and the shaft was on loose.

(Inaudible) 18 That would explain that one switch's problem.

19 prcblem.

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

VOICE:

That's one of those inspections you'll have do 22 i

23 all over (inaudible) .

MOSBAUGH: Yup. Is that the root cause.

24 You know Allen. The problem is, we don't have 25 VOICE:

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

We have a trend of the problem --

27 Look at the trend we have.

' 28 immediately after calibration.

VOICE: Right.

29 VOICE: That's what Briney has got to resolve.

30 l

NUCLEAR REGULATORY COMMISSION

) -

EXHIBITNO.% N$

DocketNo _50-424/425-OLA-3 in the matar of_Georale Ps- Co et al Voatie Unita 1 & 2 9512280215 951006 O Staff O APPh t ['[Irdervenor O Other Reporter _ Cp

' PDR ADOCK 05000424 O identified Receive.d O Rejected T PDR Den *Is /gr wiinese

i 9

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.

MOSBAUGH: You know -- l 14 15 VOICE: (inaudible) it's not that straight forward.

16 MOSBAUGH: You know you have take th,at with -- in l 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. k i

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

l 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%

I l

t

. _ _ , _ . - _ . . _ . . . . , . - , . . , - . . , . _ . , . . _ . . , . . . _ . _ . , . . . _ _ _ . , . _ . , . _ . _ _ , _ . . _ , _ . . . .. - . - - . . c.,I

e-t n

. 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

VOICE: Oops. Does that mean we're (inaudible) for the 6

7 9:00 --

VOICE: That's in George's office.

8 MOSBAUGH: -- phone call. Okay.

9 10 I'll need to head over there.

[ break -- walking sounds) 11 12 13 3

.e e

e 9 BURR:

I don't think we had a trip when we started that 1-

\

2 engine, j HOLMES: That's right.

3 We did not have a trip. And as you started it t 4 BURR:

5 it timed out at the end of 70 seconds everything was normal and i 6

then 10 seconds later our trip came in.

I HOLMES:

You are sayino the temperature went up.

7 We got to trend that and we got to f B don't know what time that is. fr in order to say and that's why we 9 know these other numbers, too, tripped at 80, that's why the engine tripped at 80 seconds. f 10  ;

BURR:

And then at the second start it was already 1 11-12 ' tripped at the end 70 seconds when it timed out and down it went. i BOCKHOLD:

Let me tell everybody my feeling at this 13 14 point.

My feeling is that we have the current best postulated start was that potentially a 15 way.the engine tripped on the first i 16 higher temperature than the normal running temperature of jacket After a period 17 water was seen by the temperature switches, okay.

failure of one so it 18 of time and because we had an intermittent 19 was venting and we had a potential calibration problem with one Today we believe that 20 or more of the other ones, thus the trip.

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

23 disprove this theory.  :

[ pause in discussion]

24 f i

I 4 I I

i I

I i

4-e.

• 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 <p n2.nsisis pooe siepsise n... prose.p...sness ... 22 24 5