ML20099L383

Intervenor Exhibit I-MOSBA-21A,consisting of Transcript Re Intervenor Exhibit 21 Tape 32-1,dtd 900404,TR 41-44

ML20099L383
Person / Time
Site:	Vogtle
Issue date:	10/06/1995
From:	AFFILIATION NOT ASSIGNED
To:
References
OLA-3-I-MOS-21A, NUDOCS 9512280211
Download: ML20099L383 (4)

Text

T-AA OSP>6 - 2. l Ps DOCKETED

+

h USNRC

-MT. EX. 21 h

')$ g 20 PS:09 a

1 TAPE 32-1 2

DATE:

04-04-90 OFFICE OF "r 3

MIKE HORTON'S OFFICE LOCATION:

"96 4

SEGMENT #1 7

8 TR. 41-44 9

I hate the word 10 Okay; and this intermittent --

MOSBAUGH:

11 12 intermittent, you know, that's --

13 HORTON:

Intermittent is defined as they " cal'd" it, 14 they installed it, and it was noticed venting. They popped it with 15 air pressure, it sealed off',

and hasn't been a problem since.

That's the definition of intermittent.

16 that's this here, I mean, "Vogtle MOSBAUGH: That's 17 18 critique team consisting -- (inaudible) -- concludes the "A" diesel generator tripped because of a combination of intermittent failures 19 20 of the jacket water switches or inconsistent calibration 21 techniques."

P HORTON:

Yeah, that's it.

22 MOSBAUGH: So what's the intermittent failure?

23 HORTON:

The fact that the switch calibrated fine but 24 f ailed in place, and then af ter being cycled 25 vented in place, i.e.,

And then was subsequently replaced with air pressure, worked fine.

26 and it's in quarantine; and we will have the opportunity to cal it 27 28 now and verify if it truly is intermittent.

Intermittent is defined as one known failure after it was placed and after it was 29 30 calibrated.

But that's, you

know, that's really no more i

31 intermi'. tent than any failure (inaudible),

t MOSBAUGH: But these are two out of three.

So we had to 32 NUCLEAR R:IGULATORY COMMISSION EXHIBITNO. N ' I M Docket No. 50-424/425 O! A-3 in m snauw d_Georale Power Co et aL Voatie Unite 1 & 2 9512280211 951006 T

S nktvenor O Othw POR ADOCK 05000424 O stan O Applicant T

PDR O ldentified elved O Rejected Reporter fu oss. Io/l, f

witn e.

J

~, s have this intermittent failure.

I Plus there was an absolute failure.

HORTON:

2 MOSBAUGH: What was that?

i 3

One -- the, either the A or C element was 100 HORTON:

4 The B thing l

5 per:ent vented, failed.

Now, one was intermittent.

slowly venting.

It wasn't full failed.

It was partially 6

was 7

venting.

That's the intermittent that we talk about here.

The l

t combination of the two took us out.

8 When we checked the one that was totally J

MOSBAUGH: Okay.

9 venting, how was its calibration?

i i

10 It's been quarantined.

It has not HORTON:

11 It has not been calibrated?

MOSBAUGH:

12 HORTON:

Correct.

13 MOSBAUGH: Cal checked.

14 HORTON:

That's correct and J

15 Okay; and the one that was intermittent?

i MOSBAUGH:

16 HORTON:

Is the same way.

17 It has not been cal checked?

MOSBAUGH:

18 HORTON:

It's in limbo.

19 MOSBAUGH: How would you know it's intermittent if it 20 1

hadn't been cal checked?

21 during their HORTON:

Because I think they went 22 l

troubleshooting noticed it venting by bubble testing it in p ace; 23 and then cycled the air pressure to it and noticed that it cleared.

i 24 it was pulled and quarantined, and we haven't 25 Subsequent to that Before That's why they call that intermittent.

26 touched it since.

2 P

d w

^ -*

'-'c-

-d e

1. \\

it was removed --

1 2

MOSBAUGH: Have we ruled out cleanliness?

3 HORTON:

No.

That's one of the steps in the, in the check the vendor wants to make when he disassembles these things, 4

5 he,-he wants to--

i 6

MOSBAUGH: No.

I mean, how about the lines?

7 HORTON:

No we haven't, but he that, he wants to check 8

the schrader valve inside the valve body, it has very tight 9

tolerances.

10 MOSBAUGH: Okay.

So I mean, you know we have--

f 11 HORTON:

It could well have dirt in it.

12 MOSBAUGH: So we haven't checked all these sensing lines r

13 for cleanliness?

14 VOICE:

(Inaudible.)

15 MOSBAUGH: Yeah.

16 HORTON:

But they weren't checked--

17 MOSBAUGH: An intermittent failure merely is an admission that you haven't gone f ar enough in your investigation to determine 18 19 the root cause.

20 HORTON:

Right.

You are absolutely correct.

21 MOSBAUGH: Okay, and I don't like the word and we use it 22 here all the time.

23 HORTON:

Yep.

24 MOSBAUGH: All that is, is an admission that you don't, you--you are not willing to proceed far enough to determine the 25 26 true root cause.

3

._..~

i t

i

~

i 1

MILLER:

The context that its used in here, is like, 2

don't worry about it, its only an intermittent failure.

i 3

MOSBAUGH: That's right, that's exactly what I'm saying; 4

but its a management, it's a management issue in that you don't j

t 5

have the dedication to go far enough to determine what the real j

s 6

root cause is.

3 i

7 VOICE:

Let's talk about testing.

l

)

8 MILLER:

You're saying I'm really not interested in j

failing it occasionally rather than figuring out what caused it.

9 10 MOSBAUGH: Exactly.

11 MILLER:

Let me tell you before you leave, the RIVILIS r

DCP is going to be on delta dash today and (INAUDIBLE] will bring a

12 4

I 13 it in with him when he comes in at 6:00 tonight.

How's that for 1

14 turn-around?

i i

PENI#rTL\\WPDOCS\\TLP\\ LICENSE. PRO \\ TAPES. INT \\32 1 EX.21 e

f i

t i

t 4

p f

't l

4 t

L a

l

,