ML20056D397
| ML20056D397 | |
| Person / Time | |
|---|---|
| Issue date: | 07/22/1993 |
| From: | Advisory Committee on Reactor Safeguards |
| To: | |
| References | |
| ACRS-T-1968, NUDOCS 9308130113 | |
| Download: ML20056D397 (65) | |
Text
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FFICIAL TRWSCRIPT OF PROCEEDINGS gen Nuclear Regulatory Commission Advisory Committee on Reactor Safeguards Tide:
Subcom ittee on Thermal Hydraulic Phenomena Docket No.
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@ TIC M Bethesda, Maryland DATL Thursday, July 22, 1993 1 - 14 preg,3;9 7 - 24 3 1
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3 PUBLIC NOTICE BY THE
'V UNITED STATES NUCLEAR REGULATORY COMMISSION ADVISORY COMMITTEE ON REACTOR SAFEGUARDS DATE:
July 22, 1993
,m
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The contents of this transcript of the proceedings
~
of the United States Nuclear Regulatory Commission's Advisory Committee on Reactor Safeguards, (date)
July 22, 1993
, as Reported herein, are a record of the discussions recorded at the meeting held on the above date.
This transcript has not been reviewrd, corrected or edited, and it may contain inaccuracies.
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1 1
UNITED STATES OF AMERICA 2
NUCLEAR REGULATORY COMMISSION 3
ADVISORY COMMITTEE ON REACTOR SAFEGUARDS q
l 4
5 SUBCOMMITTEE ON THERMAL HYDRAULIC PHENOMENA i
i 6
i 7
Nuclear Regulatory Commission-8 7920 Norfolk Avenue,_ Room P-422 9
Bethesda, Maryland i-l-
10 Thursday, July 22, 1993 i
11 i
12 The meeting of the above-entitled subcommittee l'
13 convened, pursuant to notice, at 8:30 a.m.
I l
14 15 BEFORE:
16 IVAN CATTON, Chairman
!=
17 I'
18 PRESENT FROM THE ACRS:
19 J. WILKINS, Member 20 T.
KRESS, Member
[_
21 P.
DAVIS, Member j.
22 P.
BOERNERT, Cognizant ACRS Staff Member i
i 23 W.
WULFF, Consultant l-i 24 V.
SCHROCK, Consultant F
25 N.
ZUBER, Consultant i
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1 PRESENT.FROM WESTINGHOUSE:
2
~ 3 B. McINTYRE,' Manager, Advanced Plant Safety and l
4 Licensing j
5
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L.E. HOCHREITER, Consulting Engineer.
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1 PROCEEDINGS
(
2 OPEN SESSION 3
[8:30 a.m.]
4 MR. CATTON:
The meeting will now come to order.
f 5
This is a meeting of the ACRS Subcommittee on Thermal 6
Hydraulic Phenomena.
I am Ivan Catton,. chairman of the
.7 subcommittee.
8 ACRS members in attendance are Pete Davis, Tom 9
Kress, and Ernest Wilkins is around somewhere.
ACRS 10 consultants in attendance are Virgil Schrock, Wolfgang 11 Wulff, and hopefully soon Novak Zuber.
12-The purpose of this meeting is to begin the review I
13 of the thermal hydraulic analytical and experimental 14 programs being conducted by Westinghouse in support of its 15 certification effort for the AP600 passive plant design.
q 16-Actually, it's not to begin the review, it's to continue the 17 review.
18 Paul Boehnert is the cognizant ACRS staff member 19 for this meeting.
20 The rules for participation in today's meeting i
21 have been announced as part of the notice of this meeting i
22 previously published in the Federal Register on July 7th, 23' 1993.
l 24 Portions of this meeting will be closed to discuss l
25 information deemed propriety to the Westinghouse Electric l
l
((
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1 Corporation.
I might' note that I'have a little difficulty-()'
2 sometimes sorting which is and which isn't, so,. Paul, pay j
3 attention.
f 4
A transcript of the meeting is being kept and will 5
be made available as stated in the Federal Register notice.
]
i 6
It is requested that each speaker-first identify himself or 7
herself and speak with sufficient clarity and volume so that l
8 he or she can be readily heard.
9 We have received no written comments or request' I
10 for time to make oral statements from members of the_public.
l 11 What we will hear during the next day and a half 12 will be the Westinghouse plan to develop predictive tools
- L3 for describing the thermal hydraulic behavior of the AP600 14 plant during DBA type events.
Their plans include two O
i 15 thermal hydraulic codes, NOTRUMP and COBRA / TRAC, and-five 16 experimental facilities.
Three of the experimental 17 facilities are for separate effects studies and:two for
.18 integral systems studies.
19 Before I turn the meeting over to Westinghouse, I 20 would like to make a few comments about their program.
I-21 would like also to note that it appears now to be well 22 structured and seems to be reasonably complete, with only a I
23 few concerns, and these concerns may well be unfounded.
,-i 24 In general, what is lacking is detailed scaling j
25 analysis.
This seems to be generic in spite of the state of l
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i 5
I the hardware.
Further, we have yet to see the code I
()
2 calculational results that would help determine the adequacy 3
of the separate effects test conditions.
4 I will make a couple of comments about each of the 5
facilities, and then we will turn it over to Westinghouse.
6 The CMT is tall and skinny.
Its surface area to 7
volume and metal mass are not preserved.
The geometric 8
configuration of the connecting piping at the top are not j
9 preserved.
RTDs were not used to determine level.
There is.
10 little or no scaling analysis yet available to us.
11 The ADS program is focused on loads, not valves or 12 thermal hydraulics.
This is true for both Phase A and Phase-13 B of the ADS testing.
The tests use either steam or 14 saturated water as an initial condition, and the valves are'
- O 15 simulated using orifices.
We need to see something that 2
16 demonstrates that the ADS testing will yield the proper 17 operational envelope for the valves.
18 How a set of specs for the valves will be 19 developed is another matter and will most likely be 20 addressed as part of-Jay Carroll's subcommittee activity 21 that addresses the plant as a whole.
22 We will not address the PCCS test program at this 23 meeting, in part because I overlooked it and in part because 24 it involves phenomena outside of the capabilities of the 25 primary codes, NOTRUMP and COBRA / TRAC.
At some point, we ANN RILEY & ASSOCIATES, LTD.
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1 will want to hear how the PCCS will be dealt with and how (f
2 the PCCS model will'be interfaced with the primary system.
3 The OSU facility is an improvement over past l
l 4
integral system facilities.
It has, however, been.
5 fabricated before the scaling analysis is completed.
I hope j
6 there is not a downside to this optimism or the scaling; we 7
just haven't seen it yet.
8 We have a report that is exceptionally good as far j
9 as it goes.
It lacks the chapters that will have to deal 1 i
l 10 with the more difficult aspects of thermal hydraulic l
11 facilities scaling.
I would like to receive the complete I-12 document before we visit OSU in September.
13 SPES-2, which is the fifth facility, is a full-l l
14 height powar-to-volume scaled facility.
-Its scaling appears 15 to be based mostly on single-phase behavior. 'The scaling.
ll' 16 update that we received does not address the' impact of the i
1-17 splitter plate in the. cold leg, nor does it state clearly 18 what the overall goal is.
19 A lesson learned from small-break studies of TMI.
20 was:that relative volumes and heights were most important in 21 achieving similar behavior, and here I am quoting Peter
'22 Griffith.
The quality of the scaling analysis is not nearly 23 the same as that of the OSU facility.
It is clearly a 24 compromise, and, although understandable, needs some 25 rationalization.
()
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.All in all, there will be a. formidable amount of-()
2 data produced.
If the test matrices are well thought out 3
and some.of the inadequacies in the facilities'can be 4
rationalized successfully, the datasets, in my view, appear i
5 to be adequate for demonstrating that the codes can predict 6
AP600 behavior.
That is a personal view, and even the-7 consultants may not agree with me.
l 8
We will visit the code verification issue when
^
.i 9
sufficient data is available for comparison.
It would be i
10 helpful, however, if we could receive documentation on 11 NOTRUMP, COBRA / TRAC and PCCS modelling as much in advance as 12 possible, and here I think Paul may actually have some of 13 it.
j 14 MR. BOERNERT:
I have Volumes 1-through 3 of the i
15 CQD for COBRA / TRAC.
16 MR. CATTON:
Do you have the models and 17 correlations document?
18 MR. BOEHNERT:
Yes.
19 MR. CATTON:
Yes.
Okay.
i 20 MR. BOERNERT:
I don't have Volumes 4 and 5.
21 MR. CATTON:
Okay.
22 MR. BOEHNERT:
They have just been submitted 23 recently.
24 MR. CATTON:
Before we begin the presentation by 1
25 Westinghouse, do any of the subcommittee members have any ANN RILEY & ASSOCIATES, LTD.
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3' MR. CATTON:
Okay.
At the conclusion of each of
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4 the Westinghouse presentations on the various' facilities, I I
5 will ask.the consultants if their concerns have~been i-6 addressed.
I also will expect-a report dealing with where 1
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they still have open questions, i
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g Now I would like to turn it over to Westinghouse,.
8 9
and I believe Brian McIntyre will begin.
'10 MR. McINTYRE:
My name is. Brian McIntyre.
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11 MR. BOEHNERT:
Brian, hang on a'second.
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12 MR. CATTON:
Paul just pointed out'that weLhave a
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13 closed session where we will discuss these things, I
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14 consultant comments at one point.
After you finish i-p:
15 discussing OSU, I am going to open it'up'to the consultants i
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16 and we will close the meeting.
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l 17 MR. McINTYRE:
My name is Brian McIntyre,-and I.am l
1 18 the' manager of Advanced Plant' Safety and Licensing for i
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19 Westinghouse.
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20 This part of the session is open.
When I conclude 21 and Dr. Hochreiter begins his part of the presentation, that i
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22 will be the closed part of the session.
I believe the I
.I 23 slides that are proprietary are each individually 1 marked 24
'whether or not they are proprietary.
You will find that the 25 whole session is not proprietary, but maybe every fifth or j
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1 sixth slide is.
It is some percentage as you go along
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[ Slide.]
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MR. McINTYRE:
The comments I would like to make, 5
I would like to start by talking a little bit about the j
6 AP600 design certification schedule.
7 The staff recently came out with a SECY-93-097.
f 8
which presents review schedules for all of.the advanced i
9 lightwater reactors, and for the AP600, it said that we will q
10 have a draft SER issued in May of 1994 and the final SER i
11 comes out then in November of 1995, which, if you look at 12 the testing schedule, it said that the tests.will not be 13 completed at the time the draft SER is issued, and the staff.
14 allows for that in the draft SER.
The test won't be 15 finished and it will have to be listed in'that case asLopen
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16 items in the draft SER.
17 People start looking at the testing schedule and
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18 the SER schedule, and sometimes there is a high level of
.l 19 concern shown on the part of the various subcommittees and
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20 even on the part of the staff of how we are going to deal 21 with this.
22 MR. CATTON:
That means we probably won't' meet 23 with you on the codes until after -- well, I don't think we j
24 should meet until you are ready to show us how well the 25 codes do against your data.
That puts it off.until next.
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summer, doesn't it?
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2 MR. McINTYRE:
We will find, I am sure, some other.
3 things to cover.
You will see some test results, and I i
4 think even, as you point, for some of the things like 5
NOTRUMP, you will-want us to come in -- you don't want us to r
l 1
6 come in:
Well, here are the results of NOTRUMP.
7 MR. CATTON:
No.
8 MR. McINTYRE:
You are going to want to see some' I
9 things between now and then.
10 We have also made a commitment that we would' meet 11 with you every quarter, because if you lock at the schedule 12 they laid out, there are.only three months for the ACRS to 13 review the AP600.
That's how much is officially allocated.
14 Historically, it has taken longer than that for the ACRS to r
15 review a single -- like_an application.
So we are trying to i
16 make this, and I will talk about it in a minute, an ongoing 17 process.
We look at it as an investment in our time and 18 yours.
19 The Department of Energy is working with all the.
20 design organizations and the staff to develop an integrated 21 schedule which includes all the logic.that needs to be fit i
22 in, including the testing.
So they are doing this with GE, 23 they are doing this with Westinghouse, they are'doing'this 24 also with Combustion Engineering.
25 So we are working together with the staff, and we
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hope that the schedule in 93-097 can be improved.
But-there 2
will be probably another schedule available-for the AP600 in-3 the next hopefully four to six weeks that will look similar t
4 to this, but will also include and provide a good I
5 explanation of how the testing and analysis program fits in i
6 with the AP600 design certification program.
7
[ Slide.]
8 MR. McINTYRE:
Westinghouse had asked the staff-9 for a letter, if you will, blessing the testing program, and 10 we got a letter back that said -- they had just sent us some l
v 11 questions on the CMT testing program, we had just sent them 12 the testing matrices, and since they had made the commitment 13 to get the letter out, they couldn't write us a letter l
14 saying yes, they_did indeed endorse all of the. testing l
15 programs because they didn't have all of the information, i
16 and they had just got something from us, i
-17 So what they sent us was a letter where they said 18 that they agreed in principle that the. facilities and
.f 19 schedules proposed are adequate to meet the staff's needs.
l 20 So they said basically that we are on the right track.
We.
21 still do have some open items with the staff.
Like I said, 22 we got the questions on the core make-up tank test, _and we 23 are in the process of working with them to close out those i
24 open items.
They did send us informally a list of open l
25 items, so we know what specific things that we are shooting j
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2 We consider that to be I'll go so far as'to say a' l
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breakthrough,.because we have been working on this for quite-4 a period of time, and we want to make sure that we are going l
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5 in the right direction.
We don't want to in a year find out l
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that we didn't run the right tests.
Thar.'s also-the reason 7
that we have been meeting with the ACRS on such.a regular-l t
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8 basis.
1 i
9 We will also, I guess, go on record as saying we i:
l 10 thank you for the input that you have provided into the l-l l
Il testing program, because we have made some changes.
We have l
t 12 tried to be responsive to your needs'and to the staff's I
s 13 needs.
Staff did say that yes, indeed,-Westinghouse had 4
1 1
t i
14 made some changes to the program based on the input'that we j
15 had provided -- or that staff had provided to Westinghouse.
16 So it has'been an iterative process.
17 One of the questions that staff had.is they i.
18 provide the input and we have not necessarily explained to j
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-19 them how each and every of their comments have been l.
,20 addressed in the testing program.
So that is something that 1
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21 we need to get back to the staff with.
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{ Slide.]
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23 MR. McINTYRE:
I did want to talk about how many l-l l
24 times we have talked to you all, and this is a summary of L
25 all the meetings that we have had that that have had ACRS' i
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13 1
involvement in the last two years, I guess actually.since I 1[
2 have been keeping record, and it has been -- we-submitted 3
our SSAR and PRA report in June of
'92.
We had'actually had 4
quite a large number of meetings even before then.
So-this, 5
I think, shows that we are-trying to keep the ACRS involved 6
and on-board.
7 It was interesting, I think, to look at the 8
summary, because about all we have talked about has been the 9
testing.
10 MR. CATTON:
Are all of those meetings with us?
11 MR. McINTYRE:
Either with you or with your -
.a 12 couple have just been consultants.
13 MR. CATTON:
Oh, okay.
14 MR. McINTYRE:
Digital I&C I don't think was this 15 committee; it was the ACRS.
But anything that has the word 16 testing next to it I think was with you.
So we have been a 17 frequent visitor.
18 MR. CATTON:
Some of them were the NRC staff 19 meetings where ACRS consultants were present.
20 MR. McINTYRE:
ACRS involvement I think is the 21 operative word on this slide.
So we are trying to keep you 22 informed, we are trying to make sure.
We will be back 23 before next summer to talk about things with you.
24 MR. DAVIS:
What is the status of your'PRA?
25 MR. McINTYRE:
The status of the PRA?
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1 MR., DAVIS:
Yes.
I 2
MR. McINTYRE:
You have it.
j i
3 MR. DAVIS:
Okay.
And it's final?
4 MR. McINTYRE: 'It's-final.
It is as final -- it 5
is final enough for the staff to review it.
It will be i
6 final when we get the SER, which will be in a year and a i
7 half.
l
.i i
8 MR. DAVIS:
Okay.
There is nothing missing that 9
you plan to provide or any major revisions that you intend-10 to make; is that right?
11 MR. McINTYRE:
Only in response to a request for j
4 12 additional information.
t i
13 MR. DAVIS:
Okay.
Thank you.
[
14.
MR. McINTYRE:
With that, I will introduce Dr.
[
a 15 Hochreiter, who will present the technical part of the f
1 16 presentation.
At this point, it does become a closed l
1 17 session.
c a
18
[Whereupon, at 8:46 a.m.,.the-meeting ~ proceeded in i
19 closed session.]
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- 197 1
OPEN SESSION l
r
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2
[2 :18-p.m. ).
3 MR. CATTON:
One of these days somebody is going l
4 to have to explain to me what makes something close and what 5
makes it open.
.l 6
MR. PIPLICA:
My name is Gene Piplica.
I am the j
7 manager of test engineering in charge of the hardware j
8 aspects of the AP600 test, and I worked very closely with.
j 9
Dr. Hochreiter to be sure all the things that he has told
.i 10 you so far are incorporated in the test program.
i 11 What I am going to do today is just give you a.
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-1 12 brief overview of the progress we have made and-the status-q 13 of the test program.
I will just briefly describe each test 14 that we are doing that we feel is key for certification in 15 the near-future, and I want to.briefly touch on the test 16 matrixes, but I don't want to get into the details of each' 17 test, but rather what our strategies andfwhat our ideas are f
i 18 behind the test matrixes.
j i
19 We have a larger test program and these five
'[
20 tests, but we feel these are keys that must be completed for i
21 design certification purposes.
The separate effects tests 22 include the ADS test and CMT test, and we have three 23 integral tests, the Oregon State, SPES that you have heard a f
24 lot about, and our passive containment cooling system test,
'f 25 heat transfer tests are being performed, but ~ I am just going" r
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four tests today.
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1 to talk about the first
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These are the tests that are really needed for q
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investigating our safety injection systems.
The core makeup i
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tank test'is being performed by Westinghouse at the Waltz 4
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5 Mill facilities.
The tests are separate effects tests to be 1
6 run a full pressure and temperature conditions as Dr.
l.
7 Hochreiter said.
8 The simulated CMT, which is'the test article, is' i-i l
9 ten-foot high and two-foot in diameter.
For your i
10 information, it is also two inches of metal thickness.
In 11 the test, we simulate the cold leg and pressurizer balance 1
12 lines, but that is all.
The remainder of the facility i_
13 consists of the steam supply system.
14 To give.you some flavor of how the test compares 15 to the plant, the components are scaled relative to each l'
i 16 other.
Here is the test CMT and the actual CMT, and the i
l F
l l
17 elevations are correct.
The pipe routing, however, is just j
i 18 depicted on the drawing.
j r
l 19 The facility, this supplies our steam for the j
i i
L 20 test, and also provides a return for the condensate.
You j
21 can see that we have set up the test to provide full height l
22 and natural circulation.
It will be similar to what is 23 going to occur in the plant.
The two balance lines, the l
24 steam balance line here is simulating the pressurizer CMT-l 0
i 25 balance line, and we refer to that as steam line number one.
l
+
t I
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Steam line number two here is the water steam balance line,
)
2 which is simulating the. return from the cold leg up to the 3
top of the CMT.
4 The next figure in your handout shows a little bit 5
more detail of the facility, and it includes a little bit 6
more detail on the steam supply system.
We have a steam 7
generator that supplies steam at 2700 psi into a series of 8
pipes with caps that are tied together to serve as a steam 9
That steam is controlled by a valve here, 10 which is controlled by the pressure that we set in the steam 11 water reservoir.
So steam is fed ; rom the steam generator 12 into the accumulatore _ad then fed into the steam water 13 reservoir.
We can condanse the steam here to fill this 14 reservoir with water.
v 15 We have full control of what goes on in the test 16 article here.
The CMT shown here, we control steam line 17 number one and two valves, we have.a globe valve to' control 18 the condensate flow out of the discharge line.
Most of the 19 instrumentation here consists of thermocouples and pressure 20 taps.
We have a flow meter in the return line.
This' device-21
.here is a control valve so that we can control the level in 22 the CMT tank itself.
So this is tied to the delta P 23 transmitters on the CMT tank so that if we want to maintain 24 a constant level, we shut the valve here in the discharge 25 line and allow the flow to go through one of two flow
)I ANN RILEY & ASSOCIATES, LTD.
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200
.l l'
meters, depending on the anticipated flow rates.
.i
(
2 We use that as one way of performing a true 3
separate effects test so that we can try to isolate a f
4 particular phenomena.
For example, condensation on the 5
inside of the tank at a fixed water level.
'f i
6 INEL has reviewed the tests with respect'to i
7 whether or not the tests provide adequate data for a-8 computer code validation and has forwarded that report-to 9
the staff, and we have a copy of it.
The staff has reviewed 10 it and recommended that we add some instrumentation in the 1
11 tank, fluid thermocouples in the tank, additional. delta 1P 12 sales to help establish the mass energy balance around the-13 loop.
We are considering adding those additional 14 1
15 inrtruments.
I think we agree'that they will help better 1
16 define the test, and we will most likely add those i
E 17 instruments prior to the matrix test that will be perfcrmed.
i 18 They also recommended that we insert flow 19 measurement devices in steam line one and two, and that has 20 always been our intent, but, unfortunately, we have not been i
t 21 able to find a device that will satisfy ~our requirements.
j 22 The reason being that the test covers the full range of f
23 pressures from atmospheric up to 2250,.and we can't find one a
24 meter that will perform that function.
j r
25 Also, in steam line two, we can get water-flow up
{
i
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.1 201 j
1 this line and into the CMT, and we haven't been able to find i
l 2
an instrument that will be able to measure the steam and 3
water flow, or two-phased flow.
4 However, in order to estimate.what the flow rates i
5 are, we have delta P cells across the valve, and we have 6
performed a lot of preoperational tests to characterize 7
pressure drop in this valve so that we can estimate the flow i
f 8
rates in these lines.
9 Where we stand on this facility, we have completed 10 the construction and have already begun our preoperational
- l 11 tests, which I will describe in a minute.
The cold 1
i 12 preoperational tests are completed, and the hot t
13 preoperational tests are underway.
In fact, they should j
14 have completed one about now, today.
l l
15 The matrix tests are scheduled to. start in early i
16 August, but we are a few days behind our schedule and that l
17 may be delayed a week or so.
The matrix of tests have
~:,
18 evolved over time as a result of discussions we have had j
19 with the staff, with you, and with the EPRI analysis and f
i 20 test review team.
We are including our preoperational tests l
1 21 on our test matrixes that we are publishing and have given 22 to the staff because we are running the tests with the same 23 level of quality assurance requirements as we are the matrix j
l 24 tests.
)
'l 25 As Larry mentioned earlier today, the matrix has ANN RILEY & ASSOCIATES, LTD.
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been designed to start with the simplest test and go to the
()
f 2
most complicated.
For example, the first cold i
3 preoperational test is simply a component fill and drain, 4
measure the volume and check out the instrumentation-5 channels to be sure they are working correctly.
l 1'
6 The last tests, which are a series of tests, are l
7 single phase, natural circulation of the core makeup tank, i
8 heating it up, and then it is followed by drain down and j
9 depressurization event.
That test approximates what would 10 happen in the plant, and those tests.are done over a range j
i 11 of initial conditions.
That is why there are six tests j
12 listed here.
13 We have used this same philosophy in all our test'
[
'l 14 programs, and have incorporated the logic that we have a
15 established here for testing into the other programs, as you 16 will see later.
The cold preop tests are straight-forward-l
~
l 17 and designed to obtain characterization of the facility.
j 18 The data from those tests will be used'in the computer codes l
?
19 of the tests in order to minimize the uncertainty.
)
.20 For example, we do tests to get line resistent i
21
. measurements with single phase fluid, and we will use that
}
t 22 data rather than the Crane Manual to establish the i
23 resistances throughout the. test itself.
i 21.
But I must tell you that we compared this to i
25 Crane, and we found very good agreement.
So that gives us i
i
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i 203' 1
more confidence that we are able to run the facility and
)
2 establish these parameters correctly.
3 As I said before, we'have completed'all these 4
tests and we have entered into the hot preoperational tests,.
5 and these tests are designed, again, to give us information i
y 6
about the facility, but also to give us information, unique
}
7 information, about the phenomena that is occurring within 8
the test tank itself, so that we can be sure that the matrix 9
tests that we are planning to run are the most appropriate.
10 So we are using the data from these tests to help us learn 11 how to run the facility, to help us guarantee the safety and t
12 integrity of the facility, and also we are learning about 13 how the core makeup tank in this facility will operate, and 14 how we can apply that to the plant.
j O
-i 15 Then, when we get to the matrix tests, we will be 16 in a good position.
The operators will be experienced so i
17 that they can run the facility, and we will have learned 18 about how the facility operates.
We will have had an i
i 19 opportunity to look at our pretest predictions and be sure j
20 that we are testing in the right regimes.
21 So when we complete the hot preop tests in a week
-l 22 or so, we will-take a little bit of time to examine the data l
23 from these tests, be sure that we understand it, and then.
~
~
t 24 begin the. matrix tests.
Even the matrix tests.are designed 25 to start simple and work their way up to be more complex, 1
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1 and you can see_that there are multiple tests here.
I have 1
()
2 simply described them in the categories, but the reason 3
there are multiple tests is, they are performed'over a range
}
4 of conditions.
l 5
Any questions on the CMT test?
6 MR. SCHROCK:
Is the hardware at the top of the 7
CMT simulated geometrically?
8 MR. PIPLICA:
The test was designed to be scaled 9
geometrically, yes The tank is two-foot in diameter versus 10 a 12.5-foot diameter tank, and the piping was scaled' 1q 11 appropriately, so the pipe diameter has the same ratio as
'l 12 the diameter of the tank, about one-sixth.
13 MR. SCHROCK:
But it is geometrically similar'in 14 other respects?
15 MR. PIPLICA:
Yes.
The line going to the tank is.
i 16 sloped at the same slope as the plant, and we included those 17 two check valves which are in the plant also.
i 18 MR. WULFF:
The height above the level is also
'i 19 scaled to the diameter?
t 20 MR. PIPLICA:
The height above the level?
-l 21 MR. WULFF:
In the. tank,-initially are they all j
l 22 filled?
?
i 23 MR. PIPLICA:
Well, it-depends on the test.
That i
i
'24 last test-that I showed on the matrix, the tank would be as.
1 1
25 the plant,. filled up into the stand pipe, the pipe that j
?
?
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enters in'the top of the CMT, yes.
(h 2
MR. SCHROCK:
But that pipe connects to the recirc
]
-3 pipe from the cold leg, and that is the geometry that:I am 4
really asking about?
l 5
MR. PIPLICA:
Yes.
6
.MR.
SCHROCK:
Is all of that similar' geometry,
]:;
7 just_ scaled down in dimension?
8 MR. PIPLICA:
I believe it is, yes.
9 MR.-EOCHREITER:
We don't have the steam trap that l
10 comes off of that pipe in the test.
We do have the two s
11 different balance lines that come into the test.
Gene, the 12 only question
.ould have is, what is-the diameter of the j
13 piece of pipe between the junction of the two to the CMT, 14 and I believe that is the 2.5 inch or 1.5 inch pipe?-
15 MR. PIPLICA:
That's right.
16 MR. HOCHREITER:
Then, yes, that.would be the way f
17 it is in the plant.
18 MR. SCHROCK:
That picture doesn t look-the same 19 as what I remember as a picture of the AP600.
20 MR. HOCHREITER:
The difference is that the t
21 pressurizer line in the AP600 is coming more in from the 22 top, where as this is coming up' horizontal.
23 MR. SCHROCK:
Here you-show it connecting on to 24 that recirculating line.
25 MR. PIPLICA:
That is why I am hesitating in l
8 I
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u 206 1
answering you because I am not entirely familiar with'how 2
the-plant layout defined this intersection.
3 MR. HOCHREITER:
That-is close, except'it drops 14-down.
The line actually drops down.
That line drops down
~
-i 5
because the isolation valveEis located below the top of the 3
6 tank, and then there is the condensate. drain that comes off 7
that line.
8 MR. PIPLICA:
I can tell you this, though, in the 9
OSU tests, and the tank is about the same diameter, but it i
10 is half the height in the OSU test, we faithfully -
11 represented all the pipe routings in OSU, they were all 12 taken off the plant layout drawings and scaled down, but all j
13 the elbows, twists, turns, angles are all duplicated in the j
14 OSU tests.
I know that this part represents what is' going l
15 on in the plant, but whether or not this line.comes up from 16 the bottom in the plant, or it comes in from the top, it is 17 shown on this schematic, and this is just a schematic, but i
i 18 the actual routings aren't quite correct'here.
19 We will look at that.
I think we ought to.
]
20 MR. ZUBER:
I would like to make a comment.
The f
)
21 behavior you may have in the plant may quite be different 22 from the one you will have in this facility.
There'is so j
23 much different.in the mixing, and the effect of condensation l
24 will be so different that I am afraid if you'take a model 25 based on your satisfactory model from your tests, and then.
l i
t ANN RILEY & ASSOCIATES, LTD.-
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207 1
you want to apply it to the reactor, it will be a large 2
jump.
g 3
MR. HOCHREITER:
One way that you can' compensate 4
for it, and that is in the text matrix is, you run tests 5
with these levels fixed at different elevations, and that is.
6 already in the test matrix so that you get a better aspect t
7 ratio, if you would, between the water surface area for 8
condensation, and the wall area for condensation.
That is 9
controllable with the tests.
10 MR. ZUBER:
This is something you really have to 11 pay attention to because I think the phenomena and the
- i i
12 processes, not only in time, but in transit of the process, 13 it will be quite different.
14 MR. HOCHREITER:
Yes, we are aware of that.
4 15 MR. PIPLICA:
ADS Phase B is being performed at l
5 16 the VAPORE Facility in Casaccia, Italy, which is just 17 outside of Rome, and the ENEA is responsible for conducting.
18 the tests.
It is separate effects tests-using full-scale 19 prototypic hardware, and the purpose of the tests are to 20 evaluate the performance of the valves in the ADS' system as
.i 21 well as to obtain piping --
1
'i 22' MR '. CATTON:
But you don't have the'valvesLin j
23 there, so how can you evaluate 1their performance?
24 MR. PIPLICA:
In Phase B,-the valves will be in l
f 25
- there, t
'l
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MR. CATTON:
They will?
{
()
2 MR. PIPLICA:
Yes.
I heard you say that this 3
morning, and I was surprised to hear you say that.
4 MR. CATTON:
I had that in my notes.
5 MR. PIPLICA:
In Phase A, the valves were not in.
6 MR. CATTON:
So the actual valves that will be 7
used in the plant will be in Phase B?
8 MR. PIPLICA:
That's right.
In fact, the Stage 2 l
1 9
valve was just shipped to-our CMT test facility for 10 refurbishment in preparation for insertion into this test.
11 MR. SCHROCK:
Ivan, the plant has two valves in l
12 series, and they are simulating one of those two valves with' 13 an orifice in each trair..
14 MR. CATTON:
And the valve is downstream of the t'"
15 orifice?
16 MR. SCHROCK:
.Well, sometimes downstream, 2
17 sometimes upstream.
18 MR. PIPLICA:
Yes.
We were being very clever, we 19 thought, in that we decided that there was a lot of.
20 discussion about whether the orifice should be upstream or 21 downstream of the. valves, and so we decided.to put one 22 upstream and one downstream.
23 MR. CATTON:
You flash the pipe and rotate it?'
l 24 MR. PIPLICA:
And one of Dr. Schrock's comments I
25 pointed out that we may not achieve the proper conditions at
()
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209 l'
the entrance to the valve if we use the orifice in front of-2 it.
3 MR. CATTON:
That's right.
4 MR. PIPLICA:
We are looking at that again, but we 5
have that option.
That is something we can do.
But we have l
1 6
to get that clarified.
This package right here, this is I
7 really the test article, and we are actually going to build 8
a full scale tier valve package that'would exist in the f
9 AP600.
It is going to be the prototypic piping, and will.
10 have this loop, and the piping will be laid out and built
]
11 exactly like the plant.
It will be elevated off the ground.
i 12 We are going to have a single gate valve in Stages 2 and 3',
13 and the four-inch globe valve for Stage 1, but we had 14 planned to put orifices in just to represent the pressuras O
I 15 draw for the other valve.
16 One of the orifices was going to be in front of
-l E
17 the valve, and two behind the other two valves, but we are
'I
- -r 18 rethinking that now based on your comments.
19 MR. CATTON:
Also, the line that feeds your test i
1 20 section is quite long.
That is not the same as you would l
21 find a plant, is it?
l 22
.MR.
PIPLICA:
Well, everything from here back is
{
23
'the supply system for the test, and even though this tank 24 was built to represent a PWR pressurizer, we are simply 25 using it as a source of steam and water.
In the plcnt, this ANN RILEY & ASSOCIATES, LTD.
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i 210.
1 is attached directly to the pressurizer.
So what we need to 1
(
do is be sure that we supply saturated water and steam at 2
3 this point, the entrance to the valve package, that would 4
be similar to that that the plant would see coming out of-i 5
the pressurizer.
6 To do that., the plan we have is, this line exists 7
right now in the VAPORE Facility, and they take steam off 8
the top of this large 1300. cubic foot tank, and run it 9
through the control and isolation valve.into a moisture 10 separator and into a steam supply drum, and then route it-up I
11 into the valve package.
T 12 We are. going to modify the facility, and add this l
13 line here so that we can take saturated water off the bottom-14 of the tank and through the control and isolation valve 15 here, which are 12-inch gate valves, and supply saturated i
16' water at this point.
Now, if we set the gate valves to be-17 partially open, we can flash some of this water and-try to 18 get a two-phased flow going into the valve package.
f 19 MR, CATTON:
Blended?
20-MR. PIPLICA:
Well, you asked that question when 21 we were over in Italy, so I asked the Italians that i
22 question.
I said, "Why can't we blend these together?"
23 Well, there are two reasons.why they don't1want to; 24 do it.
One is designing a-system that is connected here and i
25 here is very difficult from a thermal analysis standpoint,
(
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211 1
-and'they are very reluctant to do so.
But a more valid
([
2 reason is that if you open the bottom and the top of the 3
tank at the same time, the water will flash very quickly, 4
and you will get almost no saturated water o c of the 5
bottom, very little.
It will be gone very quickly because 6
the tank is just not big enough.
7 MR. SCHROCK:
I think you need to add to your 8
concern about the orifice, the same concern about the effect 9
of these valves even in the wide open position, and the' 1
10 length of that line.
If you have saturated liquid entering.
11 where you have the pointer, then you have a considerable j
12 pressure loss over to the first of the valves, and you may j
13 well induce flashing some place along that span, even.with
+
14 the least resistance that you have in that line, even with 15 the valves both wide open.
16 MR. PIPLICA:
This is going to be a 12-inch j
1 17 insulated line, and I would guess -- LF cy, 20 feet?
18 MR. SCHROCK:
It is a question of pressure loss 19 due to friction.
It is well saturated, and you sustain a 20 pressure loss, you are going to be super-heated.
21 MR. HOCHREITER:
Virgil, we have looked at that 22 through an analysis, and you are right, you get a smallE 23 incremental increase in the void fraction or quality, but-it; j
24 is still very, very low.
The quality is very low.
1 25 MR. PIPLICA:
Yes.
1
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MR. SCHROCK:
But doesn't that mean that your test-()
2 is not going to be capable of demonstrating operation with 3
solid liquid against the valves.
That is one thing that 4
should be demonstrated in these tests.
5 MR. HOCHREITER:
There is a loop seal that is in
.'l 6
front of the valves, so there will be water.that will be up 7
against the valve, that water is' cold but it will be like.
i 8
impacting the valve as the valve opens.
{
9 MR. SCHROCK:
I don't understand that. statement at-I 10 all in the context of what we have been discussing.
i 11 MR. HOCHREITER:
You are concerned about being l
12 able to simulate zero quality saturated liquid up against i
13 the face of the valve?
14 MR. SCHROCK:
Right.
i 15 MR. PIPLICA:
When it opens.
1 6
16 MR. HOCHREITER:
When it opens?
l l
17 MR. SCHROCK:
When it' opens and for some period of 18 time after it is open.
19 MR. HOCHREITER:
When it opens, it sees cold water i
20 that is in a loop seal in front of the valve.
1 21 MR. SCHROCK:
Yes, but that is quickly passed out.
]
4 22 As soon as the liquid that had been in the pressurizer gets 1
23 there, it is going to be hot.
So the question is, can it 24 get there as single-phased liquid, or will the pressure loss 25 in that time cause flashing before it gets to the valve.
()
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In our case, the test has not been capable of
{)
2 producing the conditions that can occur in the plant that 3
are of concern, including the performance of the valves'when 4
they see saturated liquid upstream.
5 MR. HOCHREITER:
Our calculations show that if the 6
tank is saturated, you do get some flashing and you will get 7
a small void fraction coming into the valves.
The way to 8
correct that would be to compensate for that by reducing the 9
temperature of the water in the tank, and compensate for the 10 fact that you get a pressure loss through the line-such that.
11 you can get saturated water at the valves, and that is just 12 simply a test parameter, and we can do that.
13 MR. CATTON:
Do you measure the temperature 14 distribution in the tank?
15 MR. PIPLICA:
Yes.
There are thermocouples 16 located in the tank, fluid thermocouples.
17 MR. CATTON:
So you are suggesting that you could 18 tune the temperature profile to get most anything you want?
19 MR. HOCHREITER:
That's right.
20 MR. CATTON:
Do you plan to do that?
21 MR. HOCHREITER:
Well, I am a little concerned 22 about Virgil's comments.
23 MR., SCHROCK:
My concern has to do with the 24 critical flow through the valve that is going to be strongly-25 influenced by whether the water approaching the valve is
()
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free of any vapor.
It is a single phase, and the thing that.
'()
l 2
controls the flow then is really where is incipient flashing 3
in the complicated geometry of that valve, and it can have a 4
very large impact on the amount of critical flow that'you l
5 discharged through it.
6 If you have a two-phased coming to it, it is not r
'I 7
going to be the same thing that you are concerned about.
l 8
MR. HOCHREITER:
I agree.
That is something we 9
should maybe look at.
j 10 MR. KRESS:
So you run these few tests with l
T 11 subcool water in that?
12 MR. HOCHREITER:
Again, the thing that we are 13 seeing in the analysis is that maybe for the four-inch 14 valve, you will be choked at the valve, but you wind up O'
15 being choked at the sparger.
16 MR. SCHROCK:
Well, you have a lot of complicated 17 effects having to do with critical flow, but'the one that'I i
18 am pointing to at the moment is that you have to understand, 19 you have to get out of these tests information that is going 20 to be used in validating your code, or modifying l
21 correlations in your code, or whatever you do with it, that 22 takes care of the fact that there will be in the AP600 23 periods of time during which the choke flow has a subcool l
24 upstream state.
25 MR. HOCHREITER:
I really need to go back and look
()
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'I 1
at the plant calculations because the water is coming off
()
2 the pressurizer, and that water is hot.
3 MR. CATTON:
It is coming off the top of the i
4 pressurizer; isn't it?
5 MR. HOCHREITER:
Yes.
I know when I look at the y
6 NOTRUMP calculations, I do see liquid flow before I see 7
mixture flow, but I think I should come back and check it.
'8 MR. CATTON:
Maybe you had something wrong with 9
the code.
t 10 MR. HOCHREITER:
I think I should go back and l
11 check it.
It makes sense to me that really it should be a 12 mixture, and not just hot saturated water.
13 MR. SCHROCK:
Well, in some scenarios it may, but 14 I think one of the things that can occur is that you will 15 end up with a pressurizer filled with liquid as the i
16 discharge through these valves.
17 MR. HOCHREITER:
Only after the valves open.
18 MR. CATTON:
It seems to me, if you are feeding
{
19 off the bottom of that tank, you ought to be.able to tailor 20 the temperature profile to get what you want.
You just have.
21 to plan on some slightly subcooled cases.
i
'22 MR. HOCHREITER:
We can do that 23 MR. CATTON:
Is that in your matrix'now?.
. is not in the. matrix now, no, -
1 24 MR. HOCHREITER:
It 25 most of these tests were starting with the tank basically (f
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4 i
i 216 l
1 heated to saturation, f
(
2 MR. CATTON:.You will let us know what you decide 3
to do?
4 MR. HOCHREITER:
Yes.
5 MR. PIPLICA:
We have a lot of time.
6 MR. CATTON:
I think that would satisfy you, l
7 wouldn't it, Virgil, if they ran a few of those with them 8
slightly subcooled?
9 MR. SCHROCK:
Right.
10 MR. WULFF:
Ar all the valves full scale valves?
l 11 MR. PIPLICA:
Full scale' stainless steel.
12 MR. WULFF:
But the tank is much smaller, so it 13 will blowdown a lot faster than the real plant?
14 MR. PIPLICA:
Yes.
We won't have a full blowdown, 15 we will only simulate a short blowdown.
The tests would l
1 16 last about 40 seconds.
17 MR. SCHROCK:
But that is still slow enough for 18 conditions in any instant to be basically quasi-steady from i
19 the standpoint of critical flow coming out.
20 MR. CATTON:
How long does it take to condition i
21-the tank to get ready for a test?
E22 MR. PIPLICA:
About a day.
i 23 MR. CATTON:
A whole day and 40 seconds and it is ~
[
24 over.
25 MR. PIPLICA:
It is.over, yes.
'It is just like a-l i
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train going by, and it is gone.
()
2 The purported facility exists, as Dr. Catton has 3
seen, in the status that it was for Phase A, but we have 4
completed the design to make the modifications'for Phase'B,,
5 and that package has been signed off and approved by the 6
6 ENEA Board of Directors, and they have begun the quests for 7
performing the facility modifications.
Our target to start 8
tests were February 1994, but we won't'really know the test 9
schedule until we have the contractor onsite who is going to 10 perform these modifications, and we sit down and talk to him 11 and work out a construction schedule.
i 12 However, the valves are being procured by 13 Westinghouse, as well as the sparger pedestal.
We are going 14 to raise the sparger to be more prototypical.
The data 1
15 acquisition system is being procured by Westinghouse, and' 16 all that will be onsite in Italy to meet this date.
So we 17 are doing everything we can here in the states to be sure I
-)
I 18 that our end vf the bargain is maintained, and that we do j
19 nothing that would slow down the schedule, and we ar going.
20 to work very closely with the Italians to start testing as 21 close to February as we can.
I 22 In order to design the facility, we had to develop 23 the test matrix, and right now this is plan.
I have 24 condensed it on to one page, but the preoperational tests 25 are really focusing on the performance of the valve.
These
~()
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i 218-1 tests, T-1 through 24, will be repeated at selected' times.
I
(
2 during the testing program so that we can assess the change 3
in the valve condition over time as the' valves are subjected 4
to blowdowns.
5 The tests are identified by the B for Phase B and, 6
again, they start from relatively simple tests and progress l
0 7
to more. difficult blowdown tests. -The test engineer, Larry j
8 Conway is in Italy right now.
He is working on the SPES 9
test, but he has developed this matrix to satisfy the 10 demands for analysis and also the demands for the valve 11 designers.
12 So these tests are designed to subject the valves 13 to all the conditions that we believe that we will see in 14 the AP600.
But you can see that there is a large variety of O
15 tests where the valves are opened and closed, where there l
16 are blowdowns under different conditions.
A series of tests 1
17 will be run under steam conditions followed by a series of.
l i
18 tests where saturated water is used from the bottom of the 19
- tank, t
i 20 There will be a change over period where the l
i 21 facility has to be modified so that we can go from supplying i
22 steam to-water.
t 23 Right now, the facility is designed so that it can i
-24 perform all these. tests, and we are looking at how long it.
.i 25 will take to run 28 tests, especially when you have to spend' ANN RILEY & ASSOCIATES, LTD.
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a day to set up for one test.
2 MR..CATTON:
Twenty-eight days.
3 MR. PIPLICA:
Unfortunately, you have a cool down 4
4
. period between.
Overall, we are looking at maybe three or 5
four months, perhaps five months of testing.
6 MR. CATTON:
That's without any test of l
l 7
subcooling?
8 MR. PIPLICA:
That's right.
9 MR. DAVIS:
It is not clear to me how the results i
10 of these tests will be evaluated by the NRC in time'for 11 their draft SER, is there any relationship between the two?
f 12 MR. McINTYRE:
There won't be, and if you look at i
13 the schedule for all the tests, the tests will not be 14 completed for the draft SER because that is like May of next 1,
O 15 year, and the tests will be an open item in the draft SER.
I 16 MR. DAVIS:
And then picked up in the final?
i 17 MR. McINTYRE:
Yes.
I 18 MR. DAVIS:
Thank you.
l 19 MR. PIPLICA:
The SPES facility, and we are i
20 calling it SPES-2, is being run by SIET, and we have support i
21 from ENEA with manpower help, ENEL is helping with funding, f
22 and Ansaldo is performing analysis.
It is located in 23 Piacenza, Italy, near Milan, and using the existing SPES 24 facility., and we have modified the facility.
We have a 25 1/395 volumetric scale, it is a full' pressure, full height' ANN'RILEY & ASSOCIATES, LTD.-
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)
220 i
l
'l facility at full pressure and temperature conditions, and
- j S
2' includes simulation of all the AP600 features.
l 3
The purpose of the test is to obtain thermal 4
hydraulic data at high pressure for computer code 5
verification, and the matrix that I will show you will 6
address the small break simulations, the varying break size,
-l 7
location, and interactions with and without non-safety.
'f 8
systems.
They are going to run a single steam line break
.i 9
case, and three steam generator tube rupture cases are
, 'i 10 planned.
I 11 This flow diagram shows the layout of the i
12 facility.
What we did not change, the steam generators are l
13 the same as used in the first SPES test.
The power channel l
l 14 is the same.
We have added new accumulators, the CMTs, the
- l v
15 existing pressurizer is used, and IRWST was added.
The cold i'
16 legs, two cold legs per loop, a single hot leg, and we only 17 have one pump per loop, so we were forced to go with this
.f 1
18 splitter design.
l 19 We have an annular downcomer that was built, and
[
e 20 the original purpose of that was a mechanical connection so.
l 21 that we could bring in the two cold legs per loop, the hot 22 leg, and the injection lines into a single fitting,- and'that-23 from the annular downcomer is collected into the tubular i
24 downcomer and routed to the bottom of the power channel.
25 Of course, we added the ADS system and the four-f r
i ANN RILEY & ASSOCIATES, LTD.
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l 1
stage ADS is also included, one on each hot leg.
The 2
passive RHRs, also, a single tube is used.
We installed j
3' three tubes in the test, but right now the analysis is 4
showing that we should use only one of the tubes.
5 MR. SCHROCK:
Your tubular downcomer is a single 6
tube, it is not a series of tubes?
7 MR. PIPLICA:
No.
It is a single tube by a three-l 8
inch diameter, I believe.
This is a photograph looking up 9
during construction at the top of the power channel.
This 10 is the hot leg coming in, and you can see the connections 11 for the cold leg, and right here is the connection each side' 12 for the direct vessel injection lines.
This flange is for 13 bypass flow.
j 14 This test facility is 90 feet high, and this is a i
P 15 shot inside the center of the SIET facilities where the. test t
16 is being performed, the actual test-facility is behind here i
17 and you can't see it, but I wanted to show you, right here, 18 this rectangular tank is the IRWST, and these two circular 19 tanks, the blue ones with the caps here are the core makeup 20 tanks.
]
a 21 The. core makeup tanks are a tank within'a tank.
22 In order to reduce the metal mass of the core makeup tank, 23 the Italians designed an inner tank of thin wall surrounded l
24 by a pressure tank,.and what they will do is, they will 25 prepressurize that air space between the-two tanks to a
-j l
i
~
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{
1 preset.value such that it won't implode the inner tank but,1 f
I 2
yet, when the system is pressurized to full pressure, it
\\s 3
will maintain.its integrity.
4 MR. WULFF:
With air?
5 MR. PIPLICA:
With air.
6
~ MR. ZUBER:
Let me ask you, what is the aspect 7
ratio in OSU, in SPES, and in your tests, and in the plant?
8 MR. HOCHREITER:
The aspect ratio.of what?
j 9
MR. PIPLICA:
Of the CMT.
j 10 MR. ZUBER:
Of the CMT.
11 MR. HOCHREITER:
In SPES, it is going to be 1 over 12 Iva;hly 24 in diameter, roughly.
13 MR. ZUBER:
L over D is 24.
1 14 MR. HOCHREITER:
I am sorry, L over D.
It is l
15 going to be roughly 20..
l l
16 MR. SCHROCK:
What is the high D of SPES?
17 MR. HOCHREITER:
The high D of SPES is 7.558.
18 MR. PIPLICA:
Let's start with the plant, the real t
19 CMT is 12.5-foot in diameter, 20 feet-high.
20 MR. SCHROCK:
Right, but it is not a full a..
21 cylinder.
22 MR. PIPLICA:
But it has1 spherical heads.
SPES is-23 full height, so it is 20 feet high, but it is about eight 24 inches in diameter, 7. 5..
25L MR. HOCHREITER:
Yes, 7.5 inches in diameter.
h ANN RILEY & ASSOCIATES, LTD.
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i e
I 223 1
MR. PIPLICA:
OSU?
2 MR. HOCHREITER:
It is 21 inches in diameter, five l
3 feet tall, and it has spherical head at the top.
4 MR. PIPLICA:
And bottom.
i 5
MR. ZUBER:
How much is in.the diameter in OSU?
.j i
6 MR. HOCHREITER:
Twenty-one point something.
It
~
r 7
is in my notes, in my handout.
{
s 8
MR. PIPLICA:
The last one is the CMT test, it is 9
24 inches in diameter, ten feet high, with elliptical heads.
l 10 MR. HOCHREITER:
It is like 19 inches on the ID.
11 MR. PIPLICA:
All right, the ID is 19.
i l
12 MR. CATTON:
So the aspect ratio in OSU is 3.
13 MR. PIPLICA:
That's right.
[
f 14 MR. CATTON:
The plant is 1.8.
Did I miss 15 something?
16 MR. PIPLICA:
That is about right.
-j I
17 MR. HOCHREITER:
That's correct.
i 18 MR. CATTON:
In SPES it is 30?
19 MR. PIPLICA:
That's right.
f 20 MR. WULFF:
And in the CMT it is?
21 MR. PIPLICA:
The CMT is about 5, a little over 5.
22 MR. CATTON:
Okay.
I was able to get some aspect 23 ratio sensitivity.
i 24 MR. HOCHREITER:
I was waiting for that.
25 MR. PIPLICA:
This shot looking up the power
{
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i 224 1
channel'shows all the flanges that Dr. Schrock has been
[
()
2 mentioning.
l 3
MR. CATTON:
My goodness, that is a lot of metal.
i 4
MR. PIPLICA:
It is essentially made entirely up i
5 of flanges, and we have instrumented them with.
l 6
thermocouples.
This will all be insulated.
This shows the i
7 DC bus bars coming in and going out.
They are just coming f
8 in here.
9 MR. HOCHREITER:
There is insulation.
10 MR. PIPLICA:
Yes, this will all be insulated.
i 11 MR. HOCHREITER:
There is also insulation inside 12 the flanges themselves.
13 MR. PIPLICA:
Yes, the flanges themselves are 14 insulated from the sections of piping that the flanges are O
f 15 used to connect together.
16 MR. SCHROCK:
Where are the thermocouples placed?
s 17 MR. HOCHREITER:
There is one on the inner wall, l
i 18 and I know there is one on the outer edge of the flange.
19 MR. PIPLICA:
I think that is a' thermocouple 20 connection.
21 MR. HOCHREITER:
Yes, but I don't know at what 22 elevation.
l 23 MR. PIPLICA:
This is a pressure tap, I believe.
l i
-24 I think there is a thermocouple connection here also.
- l 25 MR. HOCHREITER
I can't really explain to you why
.l t
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-225 l
t 1
this design is this'way except that this is a full-power
]
i 2
test facility,.so at time zero you could have up to 18-3 kilowatts per foot.
4 MR. PIPLICA:
I asked the' Italians'why they chose-5 this design, it is because of all'the. cycles, fatigue was
-i
-6 the issue here.
l 7
Where are we on the tests, we are in progress with'
[
8 the cold shakedown tests.
By now I hope we have completed 9
ten out of ten.
Yesterday, they were scheduled to run the 10 last two tests.
The instrumentation check outs are 11 completed, and their performance system leakage tests.
We l
12 are very concerned about leakage in the facility, so a 13 requirement is that they very carefully test the entire 14 system over the entire range of pressures and check for 15 leaks very carefully prior to the insulation.
16 The insulation contractor is onsite, and he has l
27 already taken his measurements, and is cutting his 18 insulation waiting for the leakage test to be complete, and' r
19 he plans to have the facility insulated by the middle of j
~
20 August.
Most of the people at the facility are on vacation 21 now, and when they return, at this time, they will begin
.j
-22 preparations to start the seven hot shakedown tests on 23 August 23rd.
24 If everything goes well with the tests, we should 25 be-able to begin the matrix at'the end of September. 'We
()
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B 226 1
have extensive cold and hot shakedown tests that we are i
2 performing for SPES.
Again, they start from relatively j
(
3 simple tests to characterize the facility, and hot shakedown 4
tests are really quite rigorous.
5 We start with a facility heat up at.five different 6
constant temperatures to try to characterize the heat losses i
7 from the facility.
So we will have heat losses for all the j
'I 8
components and all the piping over a range of temperatures.
]
9 Then we will proceed to more difficult tests, l
10 I want to point out Test H-6 here, which is a low
-l 11 pressure test.
We had Dr. Reis and some of his testing 12 people go to Italy to observe the facility and discuss with l
l 13 the Italians how to conduct this test so that we could use
[
14 the data and compare it to OSU.
So it is an OSU overlap t
1 15 type of test.
16 The final shakedown test is really a full i
17 transient, full power, full pressure, safety system
{
18 actuation which is initiated by opening of the first stage
.i 19-of ADS.
So this is what we term as our no break case where.
f 20 ADS would be inadvertently actuated.
[
21-The reason we are running this as a shakedown or
[
i 22 preoperational test is because we want to confirm that we
{
23 properly scaled the ADS system.
So the data from that test l
4 24 will be used to provide that confirmation, prior to going 25 into the series of matrix tests that we have planned.
l i
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227 1
MR 21EER:
I have a question before you leave.
(
2.
SPES'didn't have a CMT before?
3 MR. PIPLICA:
No.
4 MR. ZUBER:
Since you ordered it, why didn't you.
)
I 5
model the pressure closer to the OSU facility than 30 to 1 6
and so far out?
7 MR. PIPLICA:
Well, we had to maintain full 1
.I 8
height.
9 MR. ZUBER:
But still you could have probably 10 done --
11 MR. PIPLICA:
But the scaling dictates that you 12 have 1/395 volumetric scale, so you are stuck with a long 13 skinny CMT.
14 MR. HOCHREITER:
This is a consequence of the 15 scaling.
16 MR. ZUBER:
But the point is, you could have 17 distorted it, the mixing i s i~pOrtant.
18 MR. HOCHREITER:
Novak, I am absolutely sure that 1~
19 if we distorted that, this committee would have asked'why we 20 did that.
21 MR. ZUBER:
That is really not fair.
We are not 22 really asking nasty questions for you to look foolish.
The-i 23 point is, the mixing is really important, and this was the 24 phenomenon really wnich governs that process.
25.
MR. HOCHREITER:
If that is the case, it is better ANN RILEY & ASSOCIATES, LTD.
Court Reporters 1612 K Street, N. W.., Suite 300 Washington, D.C.
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___________J
.~
I f
'I 228' I
i 1
dcue in a separate effects' test like our CMT-test.
E
- I
-(
2 MR. ZUBER:
But the point is, that component is j
3 going t dictate the behavior of the system after, during the
-l I
4 transient, and I think if it is important it affects the S
transient, the involvement of the transient.
j 6
MR. HOCHREITER:
I would be very afraid that'if we
(
7 di' some distortion to the CMT in the test facility like 8
this, you would definitely distort the transient,-because
}
9 you are putting in more of a volume or sometaing else like' 10 that.
'l 11 MR. EU I am afraid you did it now, and I
{
12 think this will be one question which people may come back
}
f 13 and ask you what are the consequences.
Really,.one of the l
14 unique aspects of this facility, of your design,.is'really_
j O~
15 the function of the CMT, and if the mixing and condensation 16 phenomena are important, then I think this isn't addressed.
17 MR. HOCHREITER:
But you missed, again, part cf j
~!
18 the presentation we had earlier this morning.
If_you look l
19 at the transient, the plant transients that we_ calculated j
20 with the S. car analysis, most of the transients, particularly.
21 for the smaller break LOCAs and for the transients such as
-i 22 tube rupture and mainsteam line break, you will get 23 recirculation first before you get a substantial amount of i
24 steam and it enters into the CMT, and you will have heated l
?
25 up the liquid layer at the top of the CMT, which will reduce
}
[
)
).
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_,_.~._. _ _ _ _ _.. _ _._ __ _. _ __.___
i 229 N'
1 the effect of condensation, j
l' 2
The only time that you are going to get into a j
I 3
situation where you have perhaps large amounts of L
4 condensation is going to be for a larger small break, like a 5
double-ended DVI line break, or an asymmetric break which i
i-6 would isolate one CMT from the system, such as a double-l-
7 ended break of the cold leg balance line.
l l
l l
8 So there are only a few cases where you can'maybe i-l-
9 get ample or large amounts of condensation.
Most of the
.i l
i i-10 tests, you will have some recirculation occurring first, l
1.
l 11 which will give you this hot liquid layer at the top.
So l
12 you become less sensitive to the condensation and/or the j
1 I
l 13 mixing.
i-
~
14 Your point is valid, I am not disagreeing with i.
't
[
15 your point.
l t
16 MR. ZUBER:
Let me say from experience, what is'
]
i g
17 scaling, you don't go like a drunk man, you are. held to a l
L 4
j 18 force because this is scaling.
The point is, you have i
1 l
19 defined what is the important phenomena, and then you design 20 your facility, and you scale it according to what governs p
l 21 the phenomena.
I think if this was an important_ phenomena, i-l.
22 it stands to reason to address it.
I am.really afraid that j
i 23 this is an atypicality.which may influence the involvement i
24 of your transient.
l 25 MR. HOCHREITER:
Okay.
I e
1 d ()
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Court Reporters 1612 K Street, N.W.,
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-,,,..- -,J. - _ _. __
2.
J l
230 1
MR. CATTON:
What-you didn't give us in-your table
~ 1 2
was, what is the aspect ratio of the CMT-separate effects l
!]
3 test?
~4 MR. PIPLICA:
That is 19-inch inner-diameter,' ten f
5 feet high.
q 6
MR. DAVIS:
It is about 5.
j 7
MR. CATTON:
I missed that.
f;j 8
MR. KRESS:
I don't think we ought to be designing' l
i 9
his test for him, but would it be posmible to change.the
(
i 10 diameter of just the top of that so that you have your 11 surface area for condensation, and yet you scale to maintain j
i 12 full height with the narrower section underneath.
j 13 MR. CATTON:
In which facility?
f f
14 MR. KRESS:
In the SPES.
15 MR. ZUBER:
They cannot even meet now the j
16 schedule.
'17 MR. HOCHREITER:
I will tell you, one of the 18 problems that we had was, when we went back and we looked'at-
-i 19 the original scaling, again, we had a single CMT,.and we i
-l 20 made estimates of the effect of the condensation, and it i
21 would have been overscaled by a factor of four because of j
22 the excess surface area for unit volume.
That is why the l
23 Italians came up with this design of a tank inside of a tank.
- j 24 to better scale that effect.
Otherwise, I think that would i
25 have been a major distortion of the facility.
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.~,
r i
231
-l 1
MR. CATTON:
You have aspect ratios of 2, 3,
5 and I
2 30.
3 MR. ZUBER:
But their facility is really'on the 1
4 other -- way over.
5 MR. HOCHREITER:
Yes, it is very one dimensional.
]
i 6
MR. ZUBER:
This is the integral test.
I think it l
7 would have been probably safer or more desireable to have it 8
closer to 3, 5 or something.
9 MR. HOCHREITER:
When he gets to OSU, it is going j
10 to be closer.
l 11 MR. CATTON:
It is 3 at OSU.
12 MR. HOCHREITER:
That is one way of looking at how 13 the facility is --
t i
14 MR. ZUBER:
But the point is, if this is one 15 unique component in this new plant, and this is an integral l
l 16 facility, you start with high pressure, it would have been i
17 really desireable to scale to have a smaller aspect ratio.
l
-i 18 But sobeit.
{
19 MR. HOCHREITER:
I think if you look overall, j
i 20 Novak, that you would compromise on too many other things to i
21 make it worthwhile t
22 MR. PIPLICA:
The matrix tests start out with the 23 small breaks.
This really should be less than one-inch.
So 24 this is a very small break.
You proceed to the two-inch 25 breaks and the larger breaks, including with'the double-ANN RILEY & ASSOCIATES, LTD.
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232' 1
' ended guillotine break of the balance line.
l 2
We are going to run three steam generator tube-3 rupture tests and a large steam line break.
All of these' j
4 types of tests were run on.SPES-1.
They ran small breaks.
y 5
They ran steam generator tube rupture,'and they ran steam l
6 line break.
The point I was making is that the facility 7
operators have experience.
8 I saved the best for last, OSU.
Our low pressure j
9 scale facility, quarter-height scaled.
It, too, is a 10 complete system, RCS and passive safety injection systems.
31 It has 4 00 psi G maximum pressure.
It is going to start at I
12 about 450 degrees Fahrenheit.
It is completely made of 13 stainless steel components and piping, and it is also~a code l
l 14 verification test.
L 15 We have done everything we_can to make this.
16 facility as prototypical as possible in its scaling, and we
.l 17 have gone to great-pains to duplicate the pipe routing and
~i 18 the position of each component including the tortuous surge s
19 line up to the-pressurizer.
20 Instrumentation, the instrumentation ~for this i
21 facility.
The CMT facility has about a hundred instruments.,
j 22 ADS Phase B about 200, SPES is approaching 600, OSU has 800 l
23 channels of instrumentation on it.
l 24 This is a shot looking down into the reactor 25 vessel when it was being fabricated.
I am just showing you' a
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1
'1 1
the grids and-the. spacing for the fuel rods, and the space.
( )'
2 for the reflector, and this shows the connection for the hot'
'i 3
leg.
I 1
4 This shot is just showing a weld of the hot' leg to 5
the inner barrel.
l 6
These are the penetrations on the lower flange.of
[
7 the reactor vessel, again showing the outline.of.the-l 8
instrumentation connections to the heater rods.
j 9
This shows the installation of the reactor vessel,
[
10 and you can see that all this is heavily instrumented,-many l
11 instruments are being used in the reactor vessel.
I am
-f i
12 going to guess close to 200, DVI line, the two cold legs, l
13 and hot leg connections, i
14 This is just another shot of the upper head, and
.O 15 this is the final placement.
The vessel is hung from the 16 structural steel that has been placed at OSU. _.The lower j
17 head is.being installed.
j 18 Now we chose to go to a flat bottom to minimize, 19 not to try to but minimize the leaks.
If we used a
?'
20 hemispherical shell, then the penetrations for the rods 21 would have been much more difficult to seal.
So we used a 1
22 thick flat plate for that.
23 This shows the installed' reactor-vessel.
This 24 completed and installed about three months ago, maybe a 25 little longer.
~
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-f 1
MR.-CATTON:
Do you have students doing this?
l 2
MR. PIPLICA: _ TIC is the industrial company.
They 3
are a very good constructor.
Right now, we have almost 20 l
4 people from TIC working 60 hours6.944444e-4 days <br />0.0167 hours <br />9.920635e-5 weeks <br />2.283e-5 months <br /> a week on the construction ~
i 5
of the facility.
i 6
MR. ZUBER:
Did the cost increase from'the last s.
7 time?
8 MR. PIPLICA:
Yes.
We started out with 370 l
9 instrumentation channels, and now we are up to 800, and that 10 comprises the majority of the cost increases.
f 11 This is a shot of the coolant pump, one of the 12 coolant pumps when they were delivered.
What TIC did is, we-13 gave them the drawing of the actual AP600 pump, and they.
j 14 duplicated the hydraulics here, and then just attached the j
'O
~
15 motor system.
16 MR. WULFF:
Four pumps?
=
i 17 MR. PIPLICA:
Yes.
l t
18 Here is a shot of the hot leg being, installed to' 19 the vessel.
Here the cold leg is installed with a flow 20 meters in place showing one of the reactor coolant. pumps
?
21 being hung from the bottom of the channel head.
Back here.
]
22 you can see some of the instrumentation racks which are 23 already in place.
j 24 Here is a shot' showing the twin pumps on the cold 25 legs.
Here you see_the stub-up for the surge lines.
It is l)
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' going-to go up to the pressurizer.
.]
)I 2
We are building a control panel for the plant.
It 3
is very comprehensive.
Each valve is controllable, we'can 4
set it on automatic, or we can open and close.it manually.
5 This is reactor information.
Here is the pressurizer j
6 information.
All the pumps are controllable We will have-i 7
the ability to monitor everything that goes on in the test, l
l 8
and all the valves and all the pumps, and everything gets 9
tied into the data acquisition system.
Sci we have _ a data l
10 acquisition system that will not only take the data from the
'f 11 thermocouples and the delta Ps and the flow meters, but also i
12 will maintain a history of what is going on with all_the.
13 valves, whether they are open, closed, partially open, et 14 cetera.
Pressurizer, we have sprays and. heaters in it.
So O
l 15 it is really a mini plant that is electrically heated.
A 16 mini nuclear power plant.
l 17 MR. DAVIS:
Excuse me, what is your total volume 18 of the system?
19 MR. PIPLICA:
The. scale volume?
20 MR. DAVIS:
The actual volume?
21 MR. PIPLICA:
Let's see, it is 1/292, I believe, 22 or 1/196.
1 23 MR. HOCHREITER:
It is 1/196.
It is the AP600 P
24 volume divided by 196.
25 MR. PIPLICA:
It is 8,000 cubic feet, isn't it?
I (I
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1 It is about 1/200th of 8,000' cubic feet?
[e -- g 2-MR. HOCHREITER:
That doesn't sound right.
I l
3 don't want to guess.
. [
a j.
4 MR. PIPLICA:
Yes, we shouldn't guess.
i 1
i
[
5 MR. DAVIS:
I was just trying to get a feel or its 6
relative size with loft because 200 cubic feet-must be --
b f
7 MR. HOCHREITER:
I don't want to guess.
}
r 8
MR. DAVIS:
Okay.
[
9 MR. CATTON:
We can fill it up with freon and
- j j.
10 simulate 2,000 psi.
11 MR..KRESS:
You get 5 to 1.
j t
1 12 MR. PIPLICA:
I am showing you the back of the I
I 13 instrumentation panel here, all the controllers, and I j
t q.
14 wanted to point out the hookups.
I learned that we'are l
E 1
[-
15 being billed.
The way they estimate this job is by the 16 number of wire terminations that are made, and'in this i
17 facility there are over 11,000.
l I
l 18 What is the status, the design is completed, and 19 the last piece of the puzzle was the design of the sparger.
l' 20 All the major components have been fabricated.
Most of them I
F 21-have been delivered to the site.
They just recently j
4.
22 delivered last week the sump, both the primary and secondary 23 sump tanks.
As.you saw the control. room and cabinets and' i-24 instrumentation racks are already in place.
Dr. Reis has
{
l
]
25 completed his scaling analysis as Dr. Hochreiter mentioned, j
t 10m RILEY & ASSOCIATES, LTD.
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i 1
and' delivered it~to us.
Well, they Federal Expressed-it s
2 yesterday, j
l 3
We are planning on starting shakedown testing in 4
August Of course, we are having the subcommittee meeting 5
in September.
The schedule calls for matrix teats to start
'f i
6 in October, but the contractor is revisiting his i
'I 7
construction schedule and is going to get back to us in.the 8
very near future with a complete diagram,.and is going to 9
give us a reevaluation as to whether he can meet this date 10 or not.
q 11 As I said before, there is almost 20 people.
12 working on the facility, and they are working 60 hours6.944444e-4 days <br />0.0167 hours <br />9.920635e-5 weeks <br />2.283e-5 months <br /> a i
13 week, so we are doing everything we can to get the facility-14 constructed as quickly as possible.
.f 15 MR. CATTON:
How is OSU reacting to all'of this, 16 the school?
17 MR. HOCHREITER:
They love it.
18 MR. PIPLICA:
Very well, I think.
19 In the text matrix, again, we have extensive cold i
20 and hot preoperational tests in order to characterize the j
21 facility, this test matrix is designed just as SPES and the 22 CMT tests are' designed, and we have plans to run 19 matrix t
23 tests covering a range of cold leg breaks, and we have noted 1
24 where these tests will be continued into the long-term 25 cooling mode on the matrix.
So we will do sensitivity i
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tests, but only one of the groups of tests will be run~out' l
'( )
2 into the long-term cooling. mode.
So of all the two-inch-1 3'
cold leg breaks, we are going to look at breaks on different i
4 loops, bottom and top of pipe, but only one of them will.be 5
run into the long-term cooling mode.
.These tests will be:
6 relatively quick.
This test may last'up'to a day or two.
7 MR. CATTON:
There will be tests whe.re you will 8
try to simulate, as close as you can, something from SPES?
9 MR. PIPLICA:
Yes.
I 10 MR. CATTON:
Now with the wide range.of CMT aspect
'l 11 ratios, have you given any thought to trying to run a series j
12 of tests where they would be prototypic with the only change
- j 13 being roughly the aspect ratio?
14 MR. PIPLICA:
No.
O.
i 15 MR. HOCHREITER:
We haven't thought of that.
16 MR. PIPLICA:
We haven't considered that.
17 MR. CATTON:
If you do that, you might address 18 some of Zuber's concerns, and also my own.
19 MR ZUBER:
Actually, what you could really do is i
20 run tests where you expect this mixing to be important.
I 21 MR. CATTON:
And then see, indeed, if it is.
f 22 MR. ZUBER:
Actually, this will.be probably one of i
I 23 the first things I would do.
24 MR. CATTON:
That's right.
25 MR. ZUBER:
Then you really get to see how j
l
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239
.1 different those facilities are, due'to one component.
l.i
~ -
2 MR. CATTON:
If it is not important, it certainly.
l 3
makes your life easier in the compu;er.
On'the other hand, 4
if it is important, then you may have to get cracking.
i 5
MR. ZUBER:
Let me repeat something, we are not 6
asking this question really from any nasty intention, at I
i 7
least from my own thoughts, I like to be convinced, yes, 8
what you have is reasonable and can be defended outside.
9 So I think this is a concern.
This may be an r
10 important process.
The sooner you address it and you put it
(
11 aside, the better off you are and we are.
I would strongly 12 advise you to do that.
Otherwise, this can come and haunt I
13 us, us and you together, more you than us.
l 14 MR. PIPLICA:
We have been planning these tests at v
15 OSU for almost three years now.
The'SPES test is a newer 16 test.
We have been fortunate'that a facility was available
{
t 17 for us to modify.
I think the important thing now is to get 1
18 tests underway, and we are very close.
Issues like you are 19 bringing up now, Novak, I agree we have to look at them and f
20 understand them.
Whether or not we can make the' adjustments 21 that you a.re suggesting remains to be seen.
l t
22 MR. ZUBER:
The only thing that I am actually 1
23 suggesting is you should assess for a condition where you l
1 24 expect that mixing and condensation is important, and see 25 whether the results from those two facilities are different i
e i
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-i (202) 293-3950 t
s
240 l'
or not.
2 MR. HOCHREITER:
That is already covered in the 3
matrix.
4 MR. CATTON:
It would be helpful, maybe when we 5
are at Oregon, if you could point out --
6 MR. HOCHREITER:
I can point-it'out right now.
7 MR. CATTON:
I can't see it just looking at that.
]
1 8
MR. PIPLICA:
It is in your handout.
9 MR. HOCHREITER:
The tests, again, looking at-the 10 SSAR analysis which is, right now, the best guide, the 11 double-ended break of the DVI line would be a test where I 12 would expect condensation to be-important.
The double-
]
13 ended break of a cold leg balance line'is another test where 14 I would expect condensation to be important.
Those are 15 large breaks for the DVI line case,.you get' rapid t
16 depressurization, you don't get the recirculation, so.you 17 should get steam coming into the CMT from the cold leg-1 i
18 balance line very early in the transient.
19 For the double-ended break of the pressure balance 20 line, in that situation, you basically are going to be l
21 isolating one CMT relative to the other, so you have
)
22 recirculation in one of the CMTs, and you get no i
23 recirculation in the other one, and you get steam in from 24 the pressurizer.
So I think both of those tests show up in 25 OSU and in SPES, both of those tests from the test matrix in ANN RILEY & ASSOCIATES, LTD.
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both facilities.
F
()
2 I want to make sure I understand what Dr. Zuber is 3
saying.
You are saying we should run a test in-OSU to look 4
at the mixing effects?
i i
5 MR. ZUBER:
I would run comparable tests for.the
. i 6
same transient, run it in OSU and run it in SPES.
j 7
MR. HOCHREITER:
That is done.
Most of these 1
l 8
tests, in fact every one of these small break LOCA tests 9
that are in the OSU matrix are in the SPES matrix, every 10 one.
11 MR. CATTON:
I think what Novak is suggesting is
]
12 that we will know right away.
13 MR. HOCHREITER:
I know the.DVI line break is a' 14 nasty transient.
I don't want to jump into that one right 15 away.
I mean I want to get some operational experience with
{
16 the facility first.
17 MR. ZUBER:
It would be really kind of. difficult j
j 18 on everybody if you find something is atypical and it has a 19 considerable effect, then you have to address it, and this i
1 20 is not satisfactory for anybody.
So if you can really get' 21 this problem out of the way, then one feels better and one i
~
l 22 can plan other experiments in a more rational way and
- i
)
23 confident way.
24.
MR. CATTON:
Next on the agenda it shows here the 25 roundtable discussion where we can get into some of these 4
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things, but I would like to take a break first.
2
[ Recess.]
3 MR. HOCHREITER:
There was a question on i
4 counterpart tests.
What we have done is, most of the tests 5
in SPES and OSU overlap with the SSAR analysis, and overlap 6
with the tests that the staff is planning for ROSA-V, or at 7
least the ones that we are familiar with.
l i
8 To accomplish the counterpart test, particularly j
9 between SPES and OSU and ROSA-V, we have to work with the 10 NRC to look at initial conditions, status of non-safety 11 systems, and worst single failure assumptions.
Most of the 12 single failure assumptions in SPES are failures of one of 13 the fourth stage ADS valves to open.
We do have tests in 14 SPES where we look at the interaction of the non-safety 15 systems with the passive safety systems.
In OSU, we have i
16 tests that are in there with different single failures, 17 fourth stage ADS, a whole train of ADS, actually failures 18 which are beyond design-basis, just to see what the effects 19 are.
So we will have to work with the staff on the ROSA 20 test to look at consistency between the tests.
21 I have made up a rough table comparing the test 22 type, what the SSAR analysis is, and where SPES, OSU and our l
23 knowledge of ROSA-V are.
So we have consistency for a lot 24 of the small breaks.
This particular test with the non-25 safety system, we will be looking at that in both of these i
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4 243 1 ' facilities'as well as in ROSA.
-(
2 The no break Will be looked at across the board, S
3 as well as many of the other tests, so there should'be ample 4
overlap between these.
When we get down to non-LOCA tests, 5
like mainsteam line break, we did the SSAR anal' sis, of y
6 course.
We will look at that in the SPES.
That is also 7
planned for ROSA-IV.
i 8
The same thing with the design-basis tube rupture, 9
and then beyond design-basis tube' rupture.
We will look~at
'l 10 that in SPES, and that is going to be looked at in' ROSA-V; 11 So there should be plenty of overlap and counterpart tests.
i b
12 I think the only real thing we have to do istmake sure we 13 coordinate between the organizations what the initial 14 conditions are so that we try to match them as best as.we O
15 can.
i 16 MR. BOEHNERT:
We will get copies'of those, Larry, 17 also?
18 MR. HOCHREITER:
Yes.
19 John, why don't you come up here with us just to 20 make sure we stay on track here.
21 MR. CATTON:
Why, did he prepare the answers?
22 MR. HOCHREITER:
No, well not all of them.
23
[Whereupon, the meeting proceeded inta closed j
24 session.]
l
-l 25
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