ML19249A998
| ML19249A998 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/20/1979 |
| From: | Olson D METROPOLITAN EDISON CO. |
| To: | |
| References | |
| NUDOCS 7908290052 | |
| Download: ML19249A998 (31) | |
Text
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UNITED STATES OF AMERICA I
NUCLEAR REGULATORY COMMISSION t
t t
In the Matter of:
2:
IE TMI INVESTIGATION INTERVIE'd 31 of Dennis I. Olson Control Room Operator 4
51 6
7\\
i 8!
l Trailer #203 9
NRC Investigation Site TMI Nuclear Power Plant 10 Middletcwn, Pennsylvania 1
11f May 20, 1979 12 (Date of Interview) i 131 July 9, 1979 i
(Date Transcript Typed) 14!
231 15, (Tape Numcer(s))
16i 17l 18i 2l t#
21l C
NRC PERSONNEL:
1 22 Dorwin R. Hunter William H. Foster b
4 7 -) 0 23l
>c 24 25j
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{
P li FOSTER: The following interview is being conducted of Mr. Dennis I. Olson.
2f Mr. Olson is a Control Room Operator at TMI Nuclear Power Facility.
The 3
present time is 3:01 p.m.
Today's date is May 20, 1979.
The place of the 4
interview is Trailer 203 located immediately outside the south gate of the Sj TMI site.
Individuals present for the interview are, Interviewer Darwin R.
6 Hunter.
Mr. Hunter is an Inspection Specialist with the I&E Performance 7
Appraisal Branch.
My name is William H. Foster.
I am a Senior Inspec-8 tor / Auditor with the Office of the Inspector and Auditor with NRC and I will be monitoring the interview. Prior to the interview being recorded, g
10 Mr. Olson was provided a document explaining his rights concerning informa-tion being obtained regarding the incident at TMI.
In addition, Mr. Olson yl was apprised of the purpose of the investigation, its scope and the authority I
by which the Congress authorizes the NRC to conduct an investigation.
On 13l the second page of the body advising document, Mr. Olson has answered three 14!
15li questions.
The questions and Mr. Olson's answered will now be recorded as part of the interview.
17, 18{,
FOSTER:
Mr. Olson, do you understand the document?
19l OLSON:
Yes 20; i
21l FOSTER:
I Do we have your permission to tape the interview?
22 23 OLSON:
Yes 2 41 0 9 4
.4_? l i
25l i
e h
2 1
FOSTER:
Would you like a copy of the tape?
4 2
3 OLSON:
Yes 4
5 FOSTER:
Mr. Olson, at this time if you would, could you provide us with a 6,
brief summary of your pertinent academic background and employment history 7
as they relate to the nuclear field?
8 OLSON:
Well, I am a high school graduate, When I got out of school I g
10 w rked with a construction firm for about a year and I went in the service 11 and was in the service for eight years.
Spent five years on a nuclear submarine.
I got out of the service, I came to work here.
I have been 12 here for eight years.
13 I
14!
FOSTER:
Okay thank you I will now turn this over ta Mr. Hunter.
15 f
16I HUNTER:
Daniel, Dennis your position in the Navy, were you a machinist I'-
mate / electrician?
18{
19)
OLSON:
Machinist Mate /First Class 20' 21 HUNTER:
Machinist / maintenance.
Can you give us the time, the approximate time of day you arrived onsite at Unit 1 on the 28th?
l 24l 2s 894 322 I
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,t 3
1, OLSON:
I was supposed to start shift at 7 o' clock in the morning.
I was I
2j running a little bit late and I got held up at the north gate by a train.
3 I did not get through the research building up there until a couple of 4[
minutes before seven o' clock, and one of the security people told me I 5
could not go in.
I asked him why not and he said they have a site emergency 6!
in Unit 2 and I said that is all the more reason why I am going, and I 7
went, and I got started over that way and I figured well, maybe I'd better 8
not go through, I oughta just go up to the Unit 1 Control Room.
My super-g visor was up there and I asked him if I should stay there or go on over and 10 he said stay here.
So I did not get over to Unit 2 til about 10:30 that 11:
- I"i"9-l 12f HUNTER:
13 Okay Dennis, and when you got to Unit 2, can you describe your g
path of entry and what the activities you ended up being involved in imme-diately?
15 16
[
OLSON:
I went out through Unit 1 and down through the access hallway there, over to Unit 2 and went, I don't know what the door numbers are, but g
g I went up that door and up the back steps and into the Control Room.
20\\
HUNTER:
And when you got into the Unit 2 Control Room, what did you observe?
22 OLSON:
A thousand people.
24 894 323 1
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f 4
l
4 1
HUNTER:
A lot of people.
2' 3
OLSON:
A lot of people.
4' 5
HUNTER:
And was that due to a particular reason everyone was there, the 6
emergency control center was there at the time, or was it just a mustering?
7 OLSON: I don't even really remember.
g 9
HUNTER:
Okay, where did you go then in Unit 2 Control Room?
10, 11 OLSON:
12f I stayed in the Control Room and answered the phones for most of the day.
3 14 N
n ans er ng ep nes, were you at the control room operator's 15 desk or shift supervisor's office?
17 OLSON:
No, I was right cut there where the desks are, where the guy does 8t l
the switching.
19!
201 HUNTER:
Switching the tags and desks?
I 22!
OLSON:
Tags and desks, yes.
24 25 l
t
[
l
5 1!
HUNTER:
Did you get involved in any evolutions during the day time other 2{
than answering the phones?
3 i
4l OLSON:
Not til after about 3 o' clock.
l 5
HUNTER:
6l Okay, and what did you get involved with at that time?
7 OLSON:
I was over where the makeup tank controls are, adding water and g
g' controlling, more or less trying to control the pressurizer level, and 10 pressure at that time, because they had already gotten rid of the bubble in the A loop. So I did that from 3:30 til about 5:30 - 6:00 o' clock when I 11!
i 12f g t relieved.
Seven o' clock I believe it was.
13 HUNTER:
Okay Dennis, then after you were relieved, where did you go?
15j OLSON:
They told us we were supposed to go over to the five hundred KV 16,,
17f substation and get our automobiles surveyed and checked out so we were not contaminated or anything.
That's where I went.
18j l
19j HUNTER:
Did you end up getting processed at the five hundred foot yard and then going home?
22 OLSON:
Yes.
894 325 24!
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6 1
HUNTER:
After that?
i 2;
3{
OLSON:
Yes.
4' 5
HUNTER:
How long did it take you?
SI 7
OLSON:
Not very long.
8 gj HUNTER:
Some of the fellows were contaminated, were you contaminated to 10 any degree?
11' 12 OLSON:
No, not at all.
I 131 HUNTER:
Okay, let's go back and concentrate.
The two things, when you 14 were answering the phones Dennis, who were you generally talking with? Was 15 16l this like an outside phone calls ccming in, or between the Units?
17 OLSON:
I don' t even remember.
Everytime the phone rang I just picked it g
"~
19l 20 HUNTER:
Did you have a phone log or anything that you kept during that i
time?
22 23 OLSON:
No.
894 32'6 25; t
i r
7 1l HUNTER:
Okay, did you write it on anything down on like a note type paper l
2i or anything?
f 3[
i 4
OLSON:
No I didn't.
S 61 HUNTER:
Nobody gave you any instructions?
7 OLSON:
No. I didn't write anything down.
g 9
HUNTER:
Okay, then at 3 o' clock approximately 3:00 - 3:30 you indicated 10 that you ended up over at the makeup panel.
Who was there at that time, do 11 ig you recall?
i 13l OLSON:
Fred schelling, I believe.
15 HUNTER:
Anyone else?
16:r I
17l OLSON:
Well there were he was there.
The shift su 18l l
19l HUNTER:
Craig Faust, do you remember?
20' f
21' OLSON:
Yes, I think he was.
23 HUNTER:
Ed Fredericks 24l 894 327 25l
8
{
lj OLSON:
Well, they were, they had had the console but they were more or l
2l less spread all over things, all of them weren't at one spot.
3!
i 4j HUNTER:
I sort of get the impression, I get the impression that they had 5
been assigned control room operator and a foreman almost to each panel, 6l would that be your understanding at that time?
7 OLSON:
Yes 8
9 HUNTER:
101 How many people did you, would there be in the area of the makeup y
panel?
I 12; j
OLSON:
Well I was there and I think my supervisor was there at that time.
14{
HUNTER:
Who would that be?
15!
16r OLSON:
Greg Hitz.
And Mark Holman ended up relieving Ed Fredericks, I 17!
believe.
18(
19i HUNTER:
Okay, what about over behind the panel.
You are standing at the 20!
makeup panel, and you would be looking at the makeup tank, the makeup pumps 21f and looking over the panel makeup at the high pressure injection flow paths 22l l
at that time.
23l 24l i
894 528 25j l
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9 OLSON:
They were using those too.
7j I
2l HUNTER:
3 Do you recall the high pressure injection flow paths and and the fl ws that were being used while you were there? Was somebody reading them 4
and calling them out to you or were you actually reading them?
g Si OLSON:
There was a guy back there I don't really reacall who it was.
I 7I know we were not supposed to go over 250 gallon a minute flow through each 8
leg, but I don't recall what the numbers that he was spitting back at me g
l e i th'. r.
10l t
11 HUNTER:
Do you recall the number of pumps you had on at that time?
13 OLSON:
No 14!
15:
HUNTER:
Okay.
16:
i 17j l
OLSON:
It has been so long ago it is hard to remember everything.
18!
19)
HUNTER.
1 20l l
21t r
OLSON:
54 days.
22l\\
23l l
HUNTER:
Has it been that long?
24l 25!
894 329 f
i r
10 1.
OLSON:
Um hum.
I figured it out last night.
2; HUNTER:
Yes, time passes when you have problems.
I realize that.
Okay 3
4 y u recall what the pressurizer level was when you were standing there?
5 OLSON:
No I don't.
6i 7
HUNTER:
The pressurizer pressure.
8 9l l
OLSON:
No 101 l
11!
HUNTER:
What about any building isolation? Did any building isolations, I
that contain the high pressure, occur while you were there?
13l i
14I f
OLSON:
Uh, not that I can remember.
I - that was -- from what I remember, 15i 1
that was before I ever got up on the panel.
16;l i
17i HUNTER:
What about the core flood tanks? Do you remember anything about 18 the core flood tanks?
19f 20' OLSON:
I know we put some water in from the core flood tanks but I can't 21 remember whether it was that specific that day, or whether it was one of 22 the other days, because I was in that same spot for about a week.
23 24 2sl 894 330 t
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11 HuhiER:
Working on a makeup panel and the aux.
7 I
2; 1
OLSON:
Venting and trying to get rid of the bubble and all that.
3 4l HUNTER:
Okay, do you recall any manipulations, while you were there, with 5
the core flood tank isolation valves, the inlet valves to the reactor?
6 7
OLSON:
No.
8 Si i
HUNTER:
Do you recall stopping or starting any makeup pumps while you were 101 there?
111 i
12!
[
OLSON:
No! I don't believe I did start or stop that.
13{
i 14!
HUNTER:
So whatever was there, you think, operated all the time you were 15 at the panel?
16!
17l l
OLSON:
Um hum.
18l 19!
HUNTER:
Okay 20' I
i 21l OLSON:
As far as I can remember.
22 23 HUNTER:
Alright, um, what mode were you using to maintain makeup level at 24 that time? Makeup tank level?
25l i
894 331 4
12 i
1{
OLSON:
As f ar as I can rememuer, we had let down and whenever level got I w, we w uld add from the bleed tanks as far as I can remember.
2 3l HUNTER The normal made then, connecting the bleed tanks, started a transfer pump nd m keup right into the make up tank?
5 l
61 OLSON:
Right in the makeup tank.
Or I don't remember whether one of the 7
I DHV five valves was open when we were going from the BWST 9'
HUNTER:
If you were going from the BWST, would the makeup tank be a problem?
11!
l OLSON:
No.
12l i
13l HUNTER:
Would you be using that?
14:
1 151 OLSON:
No.
16!
17!
HUNTER:
Or would you be having trouble?
How would you maintain or would 181 you have to maintain a level in the makeup tank?
19!
20t l
OLSON:
It is not that much of a problem coming frca the BWST.
21i 22 HUNTER:
Do you recall whether the makeup pumps recirc valves were open at 23 l
that time?
24l 2C; 894 H2 i
I
I 13 OLSON:
As far as I know yes l
2; HUNTER:
Would they be recirc back to the the makeup tank?
3 4
l OLSON:
5'
- Yes 6a i
HUNTER:
How would you control makeup tank level under those conditions?
71 8
OLSON:
If the level got to too high, shut the onlet valve from the BWST just suck from the makeup tank.
11i l
HUNTER:
Do yot,.ecall doing that during that time?
12!
13 3
OLSON-14
- No.
15' HUNTER:
Okay 16i l
171
{
OLSON:
Laughter.
18{
191
{
HUNTER:
You mentioned letdown, try to concentrate on letdown.
You know 20 that particular role of what was happening.
Letdown flow, was letdown flow 21 a problem while you were there? Were you having difficulties with letdown 22 or was it?
23 24 874 333 25 l
1 I
14 OLSON:
Not, not at that time I don't believe.
y I
2; HUNTER:
Do you recall what the letdown flow was? Or was it zero?
3 4j OLSON:
I don't know.
6i HUNTER:
You don't remember.
Were you having to put respirators on and off 7
during that time that you were there after three? Were you being placed in g
on respirators and out of respirators g
10' OLSON:
I don't remember what time they brought the respirators in, but we l
were in respirators for a while, a few hours at least, I know because I had 12I l
a headache when I took the damn thing off.
14!
l HUNTER:
- Okay, 151 f
16[
l OLSON:
But I don't remember how long it was, or what time we put them on.
17!
18; HUNTER:
Is there any other activity you were involved in we need to talk 19l about?
20 21 OLSON:
That's 22 23 HUNTER:
Is there something I can ask you to try to any that you recall and 24I part of it?
25l l
894 334 l
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15 1l That's really about all I did, and that's for a period of three OLSON:
hours is just trying to control pressure, trying to control the level.
I 2
3l d n't remember where they were at the time.
i 4!
HUNTER:
Do you recall orders or instructions given to you concerning the 5
high pressure injection flow at that time? Or did you receive any new 6!
instructions at 3 or after 3 as far as high pressure injection flow and 7
what to do with high pressure injection levels?
8!
9 OLSON:
Not that I can remember.
101
{
11 HUNTER:
From Greg Hitz or anyone?
12!
13 OLSON:
Not specifically from what I can remember, 14!
(
15; HUNTER:
From Fred Scheimann?
16' i
17 OLSON:
No 1S[
19 HUNTER:
Bill Zewe?
Sometimes if you will just think about it you will say 20i ch, yes maybe the guy did, I remember the spike or I remember something.
21 Okay was there any other activities that you recall being involved in that 22l day that would key into the chronology where we will know where you were 23 and maybe you can enlighten us in these areas we're looking for information.
24 25!
894 355 i
k
.O i
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i 16 OLSON:
That wac about all tnat I Gid.
I
'.W L r call anything else I did y
2j at all.
l 3
HUNTER:
Okay and as I understand it.you worked there frcm about 3 - 3:30 i
till about seven, you were <elieved, went to the switch yard and got processed sl g
ut.
You came back, what, on the day %!f t the next day?
6 7
OLSON:
Yes 8
9l
[
HUNTER:
Okay, and you stayed in the control room for a number of days 10j 6
after that?
11l 12j OLSON:
Right, yes, I never went in the aux building or anywhere.
14i HUNTER:
Okay so we will know where you were and what to talk about.
Okay y
let me get one other item I want to check out.
I have tra;nino records 16]
r that are your records of your training.
I wanted to ask you a couple of 17l QJestions.
In your training record, last Augutt, it indicates that you had 18f some requal. experience, an. hour of requal, wh ct,iecluced reportable 19!
occurrences' operating history, ana cperating experiences.
Can you recall 20' anything like that at that time? What that would include?
21 1
l 22' OLSON:
What I think happened there.
I had had an accident July 14 and 23 where I broke my nose and broke my jaw and had my mouth wired.
24l 25l 894 336 i
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17 1
H NTE"_-
Was that right after you had had some fire fighting training? July 2.
14 y u had a car accident?
3l OLSON:
4 Yes and I was in the hospital for a while and I'd missed 15 days 5l w rk and when I came back to work, I still had my jaw wired closed and there for a while, they would not let me exercise my license because they 6
figured I would not be able to talk, yell and scream and holler so all I 7
did was more or less was take care of paper work and it was going through 8
reviewing procedures they had, and I think I actually missed that training i
9!
I lecture, but they sent me a care package, that it what we call them when we 10l lll miss a lecture, they sent it up to you and you read it and sign sheets in i
the back.
I don't remember whether I was actually at the lecture or whether 12; I read the thing that he sent up to me.
14 HUNTER:
What is a reportable occurrence to you? What does that mean?
15i 16!
l OLSON:
- Hmmmmm, 17li 181 HUNTER:
Does that have any real meaning as far as that particular name? A l
licensee event reportable occurrence or 20r i
21l l
OLSON:
Things that aren' t -- things that happen or -- I don't know how to 22' define it.
23 24
~
894 337 25i i
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18 HUNTER:
1 What about, look back in 1978 there were some plant transients, at 2l TMI-2 and you may have been involved in some of them specifically, on the control panel, or you may not have been involved specifically like Bill 3
Zewe's shift, I know, had some transients from feedwater water recirc 4
valve, that type of transient, did you receive any formal training relative 5
to review of those transients or review of operating experiences?
6l 7
OLSON:
The only thing I can remember reading on those was after they kind g
of sit down and put all the pieces together when they write up a little g
report like.
11' HUNTER:
And they send that out the care package 12 '-
i 13 OLSON:
No, not really, it was just in the control room and Gregg said all 14i you guys read this.
15l 16!
j HUNTER:
Did you sign off on it?
17!
18i OLSON:
I don't remember if I did or not.
A lot of times he will hand out 191 things he wants us to read and he will draw a line on it, and he wants u...
20i l
21i HUNTER:
How long were you in trouble for as far as the jaw and you were 22 doing paper work where - in the control room?
23 0 i j38 25I l
i
19 l
OLSON:
1, Yes, each section was supposed to have certain procedures that they 2
were supposed to review.
You know, you go through the procedures, and 3
through the prints and you know when it tells you to do a specific thing i
4j with certain valve line up and that's to just verify my lineups were right and if they were not, change the procedure.
5 6i i
HUNTER:
When was the last time you received 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> of training?
Requali-fication training over training?
g 9
OLSON:
We went to six shifts the first of the year. We went through one training week. Then the following training week we went to Lynchburg, so I
,1 1
would say it was in January.
f 13l j
HUNTER:
Okay, 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> of simulated training.
OLSON:
Um hum.
16!
17 l
HUNTER:
Shows here that the um, 181 i
19; OLSON:
19th of March when we went down there.
20 21 HUNTER:
23rd of March?
1979? 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br />?
22l 23 OLSON:
Um hum.
89 rj
}, j ()
25l f
i i
i
20 HUNTER:
Okay how was your training? What was that?
1.
I 2!
l OLSON:
3l That was the first training week that we had in Jar.uary. That was the first 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> week of training for the year. They had condansate polishers 4
and they had Cary Horner giving a lecture, and Kim Fredricks and I don't 5
remember what else they went over.
6 7
HUNTER:
What about advanced health physics requal certification, have you 8
had that? The end of last year?
Do you recall that?
g 10 OLSON:
Yes seems we had something like that.
12 13
-HUNTER:
Would that be during a 40 bcur period or would it be a extra training?
14) 15!
OLSON:
I don't think that was a 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br />.
16i t
17 HUNTER:
Part of the 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br />.
It shows here as 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> of training.
18!
19l OLSON:
I remember having it but I don't remember exactly when it was.
20 21 HUNTER:
In the retraining program, requalification shows that you had 22 training on the technical specifications, do you recall that?
23 24 894 340 25 i
f
21 OLSON:
y 2'
HUNTER:
You got your license sometimes, probably last summer, in June 3
4 ULSON:
I don't remember when that was.
5 6
HUNTER:
Okay, what did you think of the B&W simulator training and you recently came back in March?
9 OLSON:
I think I picked up a good bit...
11I HUNTER:
Were you down with Jim Floyd, is that who, or were you there before that?
13 14 I
OLSON:
No, I was 15l 16:
HUNTER:
That was Vernon Smith's shift.
17 18i OLSON:
I was down the week before then on that one with Gregg Hinson, Ed 19i Miller, Lynn Wright, Mark Hulman, George Kunder.
20!
l 21f HUNTER:
Could you for a moment elaborate on your understanding of the 22'l small break LOCA emergency procedure, what it means to you, what you know 23 about it?
0)f 3d}
25j i
)
l 22 OLSON:
y Well, with the three high pressure injection pumps that they got, 2l and the way they are lined up with the suction split and discharge split, 1
3j if y u sh uld have an event where you have a small break, and you end up in 4f a high pressure injection situation, and one of the diesels fails to start energizes the plus. One of the discharge cross connect valves that we used 5
to keep closed is now opened and there is only one that's closed.
So the 61 primary operator, he goes down to that valve. Of course, he has to know 7
which diesel failed to start.' The control room operator that is on switching g
and taging that day, he goes down to the affected 16 valve on that side corrects it off his seat and everybody's supposed to be able to respond with a certain time frame.
11; i
12l HUNTER:
Minutes, hours.
13 14 j
OLSON:
Two minutes for the CR0 to get down to the 16 valve and crack it 15' off the seat, get on the head set For getting the discharge cross connect 16i 17:j valve open, I think that is five minutes I don't remember the number exactly.
And then the control room operator whose on the panel up there, he is on 18:
the head set and he has got to tell the guy whether he has got to open the 19!
l valve more or close the valve more so we don't exceed the capacity of the 20:
makeup pump.
Then when it is running.
i 21{
22 HUNTER:
Have you been on the plant during a trip on Unit 2 during a loss 23 of feedwater or turbine trip for any reason resulting in a high pressure 24l reactor trip?
25!
i 894 342 1
?
I
23 OLSON:
1 The first ES Unit 2 ever had, I had the panel that day. I did not have a license then.
2; 3
HUNTER:
But you were there under training with somebody.
4 5
OLSON:
I had the desk.
We weren't really on the line. 'We were hot then.
6,i I think that was during hot functionals and we were doing ES surveillance.
7 8
HUNTER:
Is that when they the power curve (or sure) relief valve failed to open and blew the plant down?
l 11l l
OLSON:
Yes, that was the one we went from 2100 lbs to 11 lbs in five 12' minutes and did not know the valve was open.
13 14!
(
HUNTER:
1100 lbs?
15i 16l l
OLSON:
Yes.
17!
18!
l HUNTER:
Okay.
Have you been involved in any other trips subsequent to 191 I
that?
20i 21, OLSON:
Yes I believe so. I don't remember exactly what the circumstances 22 were. I remember one night we were bringing the plant up and they had 23 tripped a couple of times previously during the day when they were bringing 24 it up and that was the night the feedwater reg valves were in hand and wide 25j open.
But that time it went out on low pressure.
894 343 I
24 1,
Okay let me as< you, the reactor trip procedures turbine procedures HUNTER:
2 says blam, blam, how if the relief valve is opened at the time the automatic l
3i accident occurs, the reactor trip procedures indicates that veu close the 1
4{
letdown valve, start the second makeup pump, and open the five valve to pr vide if necessary provide suction for that into charge water makeup 5
water in the plants and try to prevent the pressure drop and also make a 6
pressurizer level above the 80, inches, the heaters trip, okay, if you 7
described that activity and your there on a trip, how do you react to that g
sittation.
Are you able to react to it very quickly and establish tne g
second makeup pui.ip.
11' OLSON:
Um hum. Yes.
12 k
131 HUNTER:
Does it require you to go around behind the panel to open up the 14!
five valve?
15i i
ltil l
OLSON:
No, that depends on which pump you start.
If you start the C pump, 171 and you don't have five valve open, you are going to burn it up.
18l i
19' l
HUNTER:
Okay.
You have got to start the A pump if the B pump is running?
20 21, OLSON:
A is normally lined up as the standby. C is lined up for high 22l pressure injection.
23 24' 894 344 25l i
f 25 1
HUNTER:
In this case, this particular event we are talking about 8 pump 2'
putting it on the fellow stated the A pump, isolated the letdown and opened 3
the five, whichever valve goes to the A pump which he started.
The C pump.
s..
4l Unless you go around and open the five valve first.
I 5
6 OLSON:
It will start.
7 g
HUNTER:
Oh, I understand. How long will it last?
9 OLSON:
About 3 seconds and then it's gone.
10, 11 HUNTER:
Okay, so you can't make that kind of mistake.
12 13 OLSON:
No.
i 15!
HUNTER:
6 Okay, and what about pressurizer spray valves during that type of transient? Do you 18j OLSON:
Hopefully, it is closed.
- 191, 20I HUNTER:
Okay as the pressure and after a the turbine trip, the pressure in the reactor goes up and the pressure then would you get the high pressure relief valve but before that should get the spray valve operating in that type of condition, would you put the spray valve in manual and then crank it open and use it, to limit the pressure trip or have you seen that done?
25' i
l 894 345
,I
26 ll HUNTER:
Or would you -- is that the way you would handle that type of high 2 ;
pressure transient?
3 4
OLSON:
If I thought it was necessary I would do that.
I wouldn't have any 5
qualms about putting it in the hand open and wide open.
I would not leave 1
6l it open.
7 HUNTER:
Then you would just have to get it back closed.
8 9
OLSON:
10 Then you just have to close it again and pull the handle on it.
Well y u d n't even have to go to close, you just pull the handle and 11 automatically goes shut.
13 HUNTER:
It is just a matter of doing it then, or that would be a depressur-141 izing mechanism as long as the pumps were on?
15 16l OLSON:
Okay.
17l
)
18l l
HUNTER:
In the case of the pressurizer heaters and the spray valve opera-19i ting, that night they were in manual that morning because the there was about 60 gallon a minute leaking into the reactor coolant draining tank.
2000 gallons a shift being transferred around to maintain the boron concen-tration of 1027 so the fellows apparently you had been on shift the previous day on the 27th?
24 25!
8 9 4 j d ()
t i
e
27 1,
0L50N:
No 2,
3 HUNTER:
26th?
I 4
5 OLSON:
No 6
7 HUNTER:
5th 8,
1 g
OLSON:
No 10 HUNTER:
Four days off.
11.
12 OLSON:
Yup.
And a week before that I was in Virginia.
13 14; 4
HUNTER:
Was the power fed relief valve or the 15l i
16l OLSON:
When we had been operating that way for quite a while due to the 7
boron concentration.
g I
19i HUNTER:
Even before you went to training 20!
l 21i' f
OLSON:
Concentrating in the pressurizer so we were using manual spray 22l t
turning all the heaters on so we were continually spraying the pressurizer.
24 25j 8C)4 }4/
l i
[
L
f 28 HUNTER:
lj The operator on that night indicated among his immediate actions 2-of course was to place the heaters and spray that to automatic to allow it 3
to form there function.
Do you have any idea how can you recall how long 4
that had been going on? Well you are saying 4 days off plus a week in 5
Virginia and before that.
6 OLSON:
I don't really want to give you a number.
7 8
HUNTER:
g I noticed looking at the leak rate for the plant the primary leak 10, rate had been up and being corrected for a substantial period of time to g
take into account the reactor coolant drain tank as identified leakage.
They you having trouble with adding hydrogen to the makeup tank.
Is that, do you can you, give me a feel for that?
g 14!
OLSON:
That's, I don't know whether it was leaks at the manifold or exactly 15i l
where they were, but they were having a problem getting it in that is when I
they put that temporary rig in down there at the room you just go down and 17l I
have a guy 18I 19l HUNTER:
Manually add hydrogen?
l 21!
OLSON:
Open a regulator on the bottle and we watched the pressure in the control room call him and tell him to quit.
23 24 i
2si 8 9 4
?' 4 8 i
i
i 29 1.
HUNTER:
Were you aware that the rupture disk on the auxiliary sump pump l
2!
tank was blocked.
Had that happened before you went to training?
3 4l OLSON:
I don't remember hearing about that one.
5 6
HUNTER:
Were -- the EF-12 "AB valves were closed during this transient 7
during this event and the Craig or reg valves had to open and he got them g
open in 8 minutes after he discovered that they were closed and they were gl not feeding and the 11 valves came open automatically at 30 inches on the I
10, steam generator, have you been in the situation where you had the trip and 11 then been over watching the generator as the levels were being recovered?
12 Looking specifically at the operating of the EF-ll valves and how they I
33 operate.
14 OLSON:
,5 Not that I can recall specifically, looking at how they control but 1
16l there have been times when we have tripped the pumps have started the valves open and it did control level where it was supposed to.
7 ISI gf HUNTER:
The times that you have seen it had been normal?
20' OLSON:
Yes.
21; 22 HUNTER:
Have you ever had problems with the 12 valves before that you are aware of? Of being closed and not in proper position? Or the 5 valves?
25 894 349
i
{
30 r
1, OLSON:
I did find them closed once I don't remember exactly what the plant i
2; circum:tances were whether we were heating up or just starting up or not.
I 3l 4
HUNTER:
My impression would be right now is that they should have been 5
opened because you remember that that was abnormal -- is that what you are 6l telling me?
Do you have a feeling for that when that was, or just general 7
idea?
8 g
OLSON:
No I don't have that.
10 Hl'NTER:
Any of the other valves, have you ever found the 11 valves in 11, manual?
12 13 OLSON:
No, I found EFV 4-A&B shut, 5-A&B shut, 12-A&B shut.
The pumps in 14!
sull to lock.
15 16i HUNTER:
Would that be during the heat up or they would have in effect been 7
8; in that position during the prior to shutting down the second feed pump they are in fact put in, you know, do you have to do something to the aux g
20 21 OLSON:
I don't remember exactly what the conditions were.
All I remember is that they should have been opened.
24 894 F~JC 25 l
I I
31 1!
HUNTER:
Do you recall putting them in the normal position? How would you I
2!
and I find out when that was?
I 31 i
4 OLSON:
I don't know because I didn't write it in the log book.
5 61 HUNTER:
Did you notify anybody?
7 8
OLSON:
My shift supervisor.
9l
{
HUNTER:
Who would that have been?
10 l
11{
OLSON:
Gregg Hess.
3 13 HUNTER:
Gregg Hess.
Okay.
14 I
15!
HUNTER:
16 Okay, Dennis if you have any comments, um, 17, 1
FOSTER:
7gj Okay Dennis, thank you. The interview is concluded at 3:40 p.m.
19 20j 21!
094 jS}
I 22 23 24 1
25j t
I t