ML19220C453
| ML19220C453 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/17/1979 |
| From: | Ahearne J, Bradford P, Gilinsky V, Hendrie J, Kennedy R NRC COMMISSION (OCM) |
| To: | |
| References | |
| NUDOCS 7905020046 | |
| Download: ML19220C453 (23) | |
Text
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NUCLEAR REGULATORY COMMISSION f
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IN THE MATTER OF:
JOINT MEETING WITH ADVISORY COMMITTEE ON REACTOR SAFEGUARDS
(
Place - Washington, D.
C.
Date - Tuesday,17 April 1979 Pages 1-22 79050200%
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(:c2):n-37 o ACE - FEDERAL REPORTERS,INC., q q <,7
,7 l' 0fficialReponers t L.t Ncrth Cecitci Street Wcshingten. D.C. 20001 NATIONWIDE COVERAGE DAILY
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l DISCIAIMER This is an unofficial transcript of a meeting of the Unit.ad Statas in the Nuclear Regulatory Ccemission held on 17 Aoril 1979 Ccmission's offices at 1717 H Street, H. W., vasnington, O. c.
ine t hi s transcrip_.
meating was opan to public attandance and observatica.
51as not been reviewed, correctad, or edited, and it may contain inaccuracies-The transcript is intended solely for general informational curposes.
As p'rovided by 10 C: R 9.103, it is not part of the tormal or in ~ornal record of decision of the matters discussed.
Expressions or opinion in this transcrict do not necessarily reflect final ceta::11 nations or.
- to ;oleadinc or other pacer may be filed with tne Ccmmission in beliefs.
any ?receedir.c as the result of or addressad to any state =ene or arg : men,.
contair.ed herein, except as the Ccmission may authorize.
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CR 4094 I
UNITED STATES OF AMERICA j
WRT som/wb 2[j NUCLEAR REGULATORY COMMISSION 3
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5' 6!
Joint Meeting 7j with i
8 Advisory Cc=mittee on Reactor Safeguards j
9 i
10 11 l
1 I2 ;
Commissioners' Meeting Room,,
j Room 1130, Eleventh Flcor, I3 l 1717 H Street, N.W.,
Washington, D.C.
l 14 l Tuesday, 17 April 1979 15 l l
The Joint Meeting with the Advisory Committee on F
Reactor 3afeguards was called to order, pursuant to notice,
1 17 at 3:35 p.m.,
Commircioner Gilinsky presiding.
18 '
PRESENT:
19 JOSEPH M. HENDRIE, Chairman 20 VICTOR GILINSKY, Commissioner (Presiding)
RIC'IARD T. KENNEDY, Commissioner 21 PETER A. B RADFO RD, Ccmmissioner JOHN F. AHEARNE, Commissioner 22 1, 1
Advisory Cc=mittee on Reactor Safeguards :
23 '!
a 1
Dr. Max W.
Carben, Chairman 2# j Members:
Dr. Milton S. Plesset, Dr. Paul G.Shewmon,
.#7..ca, aeoonm. ine..!
Dr. Chester P.
Siess, Mr. Jeremiah J.Rav,
,e n y, f Dr. Davi d Okrent, Mr. William M.Mathis,
') L Dr. Stephen Lawrcski, Mr. Harold. Ethering:cn i
1
j 3
l I
RUSH l
1 1A agbl P,R O C_ E_ E D,I N,G,S_
2j COMMISSIONER GILINSKY (Presiding) :
Before anybody i
3 i l
l leaps to conclusions, I want to explain that Joe is recovering t
4' from a rather painful operation.
I have agreed to chair the j
5 i.
Commission for these few days and will chair this meeting.
6l l
Max, I understand you have some things you want to 7
tell us.
8-DR. CARBON:
Yes, I do.
And let me lead off with I
9' l
side issues first.
Several of our members have to leave at i
i 10 i
4:00.
They have serious airline problems, as I'm sure you're 11 I
i aware of, and so we would like very much to close our portion 12 of the meeting at that time.
13 We have spent the last two days discussing the i
14 l
Three Mile Island accident and matters associated and related 15 l to it.
We have come up with a draft of a letter which is not 16 I
a letter, this will not be s ct to you, but you do have it 17 in front of you.
18 l l
It represents recommendations that we have agreed 19,
l l
upon as a group.
In fact, we have a concensus on recommending 20 i these points to you, but we do not have a majority of the 21,
Committee such as we would have if we had sent a letter to 22 )
C7
'L 23 I] you.
So with your permission, I would propose to read 21
%.,.. a.conm. inc.
the letter to you and then we.will be available to answer 25 additional questions following that.
4 l
I I,
i 1
COMMISSIONER GILINSKY:
I guess I don't understand agb2 l
2l l
the distinction between a concensus and a majcrity.
3' DR. CARBON:
Before we could write you a letter, I
4 we have to have a majority of the Committee, and today we did 5l not have a majority when we voted to make this a letter.
I 6
think specifically we had a few minutes ago about nine members i
7' or thereabouts, not all of whom wished to put this into a 8i l
letter and so we had less than a majority of the full 14 membetsi 1
9 of the Committee.
10 COMMISSIONER AHEARNE:
Are ycu saying then you 11 did not have a numerical majority of the Committee, but that 12 !
i most of you who were present agreed that this was the right --
l 13 '
DR. CAREON:
That's correct.
14 l
DR. OKRENT:
Could I add something?
l 15 If I understand the situation, everybody present 16 i agreed that we should transmit these comments to you orally.
17 I think that's correct.
There was not a majority of the total I
18 number of members on the Committee who voted to send it to you 19 1 i
in the form of a latter this month, with the expectation that 20 i another will' be written at our next meeting.
21 '
COMMISSIONER AHEARNE:
But'we shouldn't be drawing 22 ] the conclusion that there are many people who disagree with 23 lI m in o a,
]L o
you about this?
21 Ace-Tsceral Recorrers, Inc. 4 DR. SHEWMOM:
Some of us think faster than others.
25 DR. CARSON:
Everycne agreed the only question was i
l 5
i I
agb3 1i whether it should go into letter form or into verbal fazm.
1 2 ll COMMISSIONER GILINSKY:
Why don ' t you go rihead?
l 2
DR. CAREON:
All right.
l You will find with the draf t paper in Iront of you l 4,
t i
I S'
that I will not be folicwing the order indicated, and I will 6
point out to you the order that I will follcw.
7!
On the first page, the first paragraph:
i a'
" Natural circulation is an important 9;
mcde of reactor cooling, both as a planned process 10 and as a process that may be used under abnormal I
11 i circums tances.
The Committee believes that 1
12 ;
greater understanding of this mcde of cooling is i
13 !
required and that detailed analyses should be i
i i
14 developed by Licensees and their suppliers.
15,
The analyses should be supported, as necessary by 16,
experiment.
Procedures sbculd be developed for 3
17 :
initiating natural circulation in a safe manner l
I 18 and for providing the operator with assurance that 19 circulation has, in f act been established.
20 This may require installation of instrumentation 21 to measure or indicate flow at lcw water 22 j velocity."
'l 23 q COMMISSIONER KENNEDY:
What's the urgency of that 1
ora 24 i
recommendation?
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.ce Feceral Pecorrers. Inc. l 25 !
DR. CA2 SON :
It's a recommendation concerning natural I
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6 l
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acb4 j
circulation which we feel is a very important aspect of 2l reactor safety.
3 I
COMMISSIOEER KENNEDY:
It doesn't answer my I
4, question, Max.
Do we ha're to do it today?
l 5
i DR. CAREON:
We believe that it should be done 6l quite soon, not necessarily today.
I f
7 COMMISSIONER KENNEDY:
Does that mean at the next 8l cutage, the next normal outage or what?
9 1 l
DR. CARBON:
No.
We believe that it's something i
i i
10 '
that should be receiving attention, your attention, at a very i
11 l
early date, not necessarily at the next outage.
j 12,
I It is something that cannot be done over a one-I l
13 outage period.
It's a longer-term sort of thing, but it is i
14 something that we urge that you look into and move on quite i
15 l
i soon.
16 COMMISSIONER AHEARNE:
Specifically, as you know, 17 '
natural circulation is one of the modes talked about a great l
18 deal of bringing in at TMI.
Are you saying by this that you 19 1 I question whether that's a sound thing to be aiming at?
20 DR. CARBON:
This recommendation is aimed at other 21 l
reactors.
It is not aimed at Three Mile Island.
22 l l
DR. OKRENT:
There are at least two parts to it.
23 >
And the question of instrumentation, if you were to install 24 sc.-v,c n.oonen, inc.
something, that might require an outage.
There are other kinds 25 of studies that one might do, other kinds of procedures that n' p, g,l.
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7 l
l l
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aqb5 one might establish, these are irrespective of the plant being 2
up or down for some installation.
l 3l l
i COMMISSIONER KENNEDY:
It was specifically to the I
l 4
f instrumentation question thatimy question was asked.
{
COMMISSIONER AHEldlNE:
You say it's not aimed at 6
i TMI, but should I draw the conclusion that you are questioning i
7!
l l whether it's an appropriate step to be taking at Three Mile l
8i i
Island?
9li l
l DR. CARBON:
No, I think the Comittee feeling with j 10 regard to natural circulation at Three Mile Island is that the 11 l
l people are doing a quite responsible job of looking into the 12 natural circulation question there, and we are not addressing 13 this to that.
l 14 I COMMISSIONER GILINSKY:
Will you have more to say 15 on these points as time goes by, is that the thrust of Dave 's l
16 comment?
1 17 DR. CARBON:
Yes, we certainly will.
4 la Going ahead, then, to the second paragraph, if you'll 19 i
turn to Page Three, the middle paragraph, it too deals with 20 !
natural circulaticn.
21 '
"The use of natural circulation for decay 22 ll heat removal following a loss of off-site power 23 'I sources requires the maintenance of a suitable over-24 essure on the reactor ecolant system.
This over-sc tni a. corms, ine. q r
25 ]
pressure may be assured by placing the pressurizer d
l b.
L.
4 f
a
8 I
I agb6 I;
heaters on a qualified on-site power source 1
2 with a suitable arrangement of heaters and power l
3 distribution to provide redundant capability.
i 4I Presently operating PWR plants should be Si surveyed expeditiously to determine whether 6
such arrangements can be provided to assure I
7 this aspect of natural circulation capability."
i 0
COMPlSSIONER GILINKSY:
What are you getting at i
the question of whether we can have some confidence that f 9
4
- there, l
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10 '
l the heaters will operate?
l 11 0 I
i DR. CARBON:
To be sure that the heaters receive i
l 12 power from different sources, so that -- yes, so that you can 13 be sure that the heaters will be reliable and will operate.
i i
14 I
COMMISSIONER 2EARNE:
Is that, then, the conclusion; 15 that, in your initial review, you identified that as being 16 the most questionable part of being able to run natural circula ;
1I tion if you lose off-site power?
I I8 l DR. CARBON:
I don't know whether I can answer 19 '
l that specifically.
We view it as a very important aspect, quite important.
21 And your question was, it is the most 22 important?
23 )
COMMISSIONER AHEARNE:
Is that why it's being 24 called cut?
Ac.-secws RecorTers, Inc.
- R DR. CARBON:
Let me ask Mr. Etherington.
t 03 n ~; n
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aqb7 li MR. ETHERINGTON :
I think we understand the i
I 2 [
principle of natural circulation of liquid water, but sc=e 3
questions arise when we get boiling as to whether we can get l
4 good heat transfer without breaking a circuit.
If you lose i
i e
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the pressure there s a probability that you will get boiling, l
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6 and that's where we have the question mark.
l 7!
I think we have no reservations about natural j
t i
I 8l cifculation, given sufficient overpressure to prevent boiling i
l 9'
and sufficient level of the cooling water in the steam i
10 generator.
i Il !
These things, I think, are fairly well unders tood i
i 12 in principle, but there 's not necessarily clearly understood l
13 by all of the operators.
At least we don 't know that they l
t 14 ll are.
This is really the thrust.
15 i DR. CARBCN:
The third paragraph is the one which I
i 16 -
follows:
h 17' "The plant operator should be adequately 18 informed at all times concerning the conditions of 19 1 reactor coolant system operation which might affect 20 '
a capability to place the system in the natural 21.i circulation mode of cperation or to sustain such a i
22 ]
mode.
Of particular importance is that information 23 il
.l which might indicate that the reactor coolant system 24 s approaching the saturation pressure corresponding hce Etcef al AtOQrtef t, IN.
20 to the core exit temOerature.
T.h,is.im,cending loss
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agb8 1;
of system overpressure will signal to the ocerator t
2l a possible loss of natural circulation capability.
I 3'
Such a warning may be derivec trem pressurizer i
f i
4 pressure instruments and hot leg temperatures in con-l l
i 5;
junction with conventional steam tables.
A suitable I
i i
6 1 display of this information should be provided to I
i 7
the plant operator at all times.
In acdition, l
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8; consideration should be given to the use of the ficw l
1 9[
exist temperatures from the fuel subassemblies where 10 ;
available as an additional indication of natural I
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cir culation. "
12 !
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19 20 21,
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24 il 1:n-Fweral Aeoorters. Inc.
25 n;
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lb.ebl I
We do have, as you will note there, the word " fuel. "
i 2
i What we mean is the thermocouples at the exit of the core 3l above the fuel subassemblies.
i COMMISSIONER GILINSKY:
Do you have any sense of l
l 5
the general awareness of operators, before this incident, of j
i I
6-the importance of these considerations beyond just from the 7
pressurizer instruments themselves?
S i, DR. CARBON:
I'm sorry, I don' t believe I get your 9
1 question.
t i
10 i
COMMISSIONER GILINSKY:
Was there a general aware-11,
ness that one had to look beyond the pressuri=er level instru-12 i i
ments and look to the pressure and other parameters to have 13 l1some sense as to whether the system might be approaching boil-
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l ing?
l 15 i
DR. CARBON:
I can answer that for myself.
We, in 1,
16 '
our meetings yesterday and today, addressed the question both i
17 to the vendor and to the S taff, as to just what things the 18 ;
operator is impressed with.
He'll have a list of items to 19 follow, but we've asked the question and sought information as O'
to just which ones are emphasized to this person in his train-21 ing period, which ones are impcrtant, what things to watch out for.
'l I
If I'm being responsive to your question, I think l
24 -l av answer is that I'm unclear au the moment, but we're trvinc ics-escerat Reoorters. Inc.,
25 j l to determine more on that.
pa iL
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- )
12 i
eb?
II Do other Committee members--
2 DR. PLESSET:
Let me try to help the Commissioner.
3, What's important is for the operator to realize 1
4 that just because he has water level in the pressurizer, tha t 5;
doer not mean he has water in the core unless the pressure in l
l 6
the core is above the saturation pressure.
And this I think l
1 7
was something that was not necessarily well appreciated, at i
8' least in Three Mile Island.
l 1
9 Did that help?
10 '
COMMISSIONER GILINSKY:
Yes.
I was asking whether i
11 i there was any general appreciation of it throughout the in-t 12,
dus try.
i 13 l DR. PLESSET:
There has been a lot of emphasis on 14 the pressurizer level indicator as implying confidence that the 15 '
l core will be covered with water, and that's not necessarily the
'6 t l
case, unless the pressure in the core is above the saturation l
17 f i
pressure.
I 18 CCMMISSIONEF. KENNEDY:
Max, could you make one more
,i 19 point for me here?
20 You say:
'l ]
"A suitable display of this information
,, 1 "l
whould be provided to the plant operator at all times."
,, l
'~i Cbviousiv it is going to take time to be sure that i
i
,4
' ' th a t is provided.
What about the clants meanwhile?
.c..mme secomn. inc.
9C DR. CARECN:
Certainly the kind of awareness that
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13.
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the operator should have, resulting from bulletins and so on, ah3 h
2 0 will be very helpful in the meantime.
CCMMISSIONER GILINSKY:
Have you had a chance to 4l look at these bulletins and evaluate them?
i 5!
DR. CARSON:
We' ve looked at them, yes.
i 6
COMMISSIONER AHEARNE:
You had made some ccmments
--l 7{
back on April 7th you made some comments on, I guess, the first :
i 8
bulletin.
Do you have any ccmments on the later ones that you I
9' would like to make?
10 DR. CARBON:
We have no ccmments in this discussion 1
11 !
today on the later bulletins, other than to say that we think 12 '
i l
the second round of bulletins was gcod.
We're all in favor of 13 1:
it, but we have not had time to delve into responses to them.
I i
14 !
COMMISSIONER AHEAIWE:
Does tnat imply something 15 about the first round of bulletins?
I 16 !
i DR. CARBON:
No.
i 17 ',
COMMISSIONER AHEAICE :
I see.
18 You had mentioned, in cor.=enting on April 7th on the i
19 first bulletin, that the actions may prove to be unduly pre-20 scriptive.
Could you explan a little bit on that?
21 DR. CARSON:
We were afraid that the words used
", there spelled out too precisely exactly what had to be done,
,, b
" l spelled out too definitively what was supposed to be done, that l
24 :l it spelled out more definitive 1v than cerhaps was prudent.
,ce-mm, nemnm. t nc.
25 In scme of our discussions, for example, there was
,9
.I
', L Le e
14 I
f I
ph3 the comment made that, well, the Nuclear Regulatory Commission i
2 h representative onsite or someone else would have some leeway 3
to use judgment, but that wasn ' t sta ted.
It was spelled out 4
very specifically, you shall do so-and-so.
And we questioned i
i 5
whether it was prudent to be quite that precise, quite that t
6 definitive, on telling the people just what was what.
7 We were afraid of two or three things, one, that it i
i i
3l might lead to problems.
Second, tha t --
9 COMMISSIONER KENNEDY:
Problems such as
--?
i 10 DR. CARBON:
In my own view, I think it could lead i
ll i to such things as maybe causing the pumps to fail due to 1
12 '
cavitatien, for example.
13 A second thought, at least on my own part, was that I#
I wonder if it puts the Commission in a desirable position.
If' ic, j
you tell the operator exactly what to do and scmething fails 16 y because you're off here, a long distance away, I think that's i
17 !
i not desirable.
1 18 l COMMISSIONER KENNEDY:
Thank you.
19 CCMMISSIONER AHEARNE:
Do you have that same sense a
the n, having re.id all the bulletins?
21
.260
~!
DR. CARBON:
I personally do not, maybe in part
.I wji because I haven't studied them adequarely, but I don' t have it, n
23 l no.
i COMMISSICNER AHEARNE:
Another co:nnent you made in esJeeerae Aeoortars. inc. I 25 i your previous letter had to do about the expeditious provision o,
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L. t
15 I
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i ab4 II of instrumentation for unambiguous fluid level.
Does your i
2 Ccmmittee intend to propose specific ins trumentation approaches?
3 DR. SIESS:
The letter did not say anything about I
4' expeditious provision.
It said "to consider expeditiously l
5l the provision. "
s I
t 6'
(Laughter.)
i 7!
There's a big difference.
We would like it to be 8
censidered expeditiously and thoroughly.
If it beccmes de-l 9
sirable to provide it, the time scale for providing it is some-10 thing we can look at then.
11 COMMISSIONER AHEARNE:
Had you thought about any--
12 !
l Or do you intend to provide any recommendations as to the i
l 13 '
l specific type of instrumentation that might be appropriate?
l 14
DR. SIESS:
There was some discussion the last two i
t 15 days that the Staff sat in on along those lines.
We will be 16 '
discussing it further.
1 f DR. CARECN:
To go on to paragraph four, which is 18 the top one on page 3 :
i 19 '
"The exist temperature of coolant from the q>,
20 core is currently measured by thermocouples in many
'l PWR's to determine core performance.
The Committee
'2 d recommends that these temperature measurements, as 1
23 -l currently available, be used to guide the operator 24l concerning core status.
The range of the information c.- m n
- a. corers.ine l
,c
'~
displayed and recorded should include the full i
go qg i t.
L,
16 I
ah5 Ii capability of the thermocouples.
It is also recom-2h mended that other existing instrumentation be examined I
for its possible use in assisting operating action during a transient. "
l 5:
I think what we 're saying there is, for example, in 6-the first part, is that many of the PWR's have thermocouples.
i 7l We don't think they are used in scme cases as ef ficiently and i
i 8l to the extent that they could be to provide useful information i
i 9
to the operator, 10 They could, for example, be displayed on some sort 11 1 of board or--
12-COMMISSIONER GILINSKY:
Rather than have to be i
13 ';
called up on a computer?
i 1.1 D2. CARBON:
Yes, te make + em more readily avail-15 '
ab le.
16 l And then the second thing, to exten' the range over 17 :
I which they will =easure.
They may be used on scme recorded i
18 '
measures 20 degrees over the expected normal limit, and we're 19 saying we would recommend that that be changed so that they O'
could be used up to the extent of their capability.
'l tl COMMISSICNER GILINSKY:
And no t to print out dollar l
22.i signs.
I
'3 l DR. CARBON:
Going to paragraph nu.nber five, which i
24 l
' is cr~e 2, the middle paragrach '-
And incidentally, vour firs t ic..ncer n a m n.inc. l 2'5 l paragraph on page 2 is not x-ed out.
Please do so.
I
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D
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17 I
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Paragraph five, the second paragraph, says:
I I
2 "The ACRS recommends - "
6 3'
COMMISSIONER GILINSKY:
Where are you again, please?
4 DR. CARBON:
Page 2.
5 COMMISSIONER KENNEDY:
The first paragraph should i
6 l be scratched out?
l 7!
DR. CARBON:
Yes.
3!
The next paragraph:
9 "The ACRS recommends that operating power 10 '
i reactors be given priority with regard to the defini-11 l
tion and implementation of instrumentation which pro-12 '!
vides additional information to help diagnose and 13 follow the course of a serious accident.
This should 14 l include improved sampling procesures under accident 15 '
l conditions, and techniques to help provide improved i
16 !
guidance to offsite authorities, should this be needed.
17 !
i The Committee recommends that a phased implementation 18,
approach be employed so that techniques can be adopted 19 shortly af ter they are judged to be appropricte."
I think one of the major things we 're saying in this 21 1 paragraph is ' hat we believe we understand that past efforts have been aimed at providing such information on new plants and we ' re urging that prior ty be given here to existing planrs -
i 24 !'
Going on down to the bottem of that pace, to cara-
.ca,cera. Recor en. inc. ;
mc
'~ l graph six -- and there are two paragraphs there which are 1
l l.
L. 0 *
^
I 18 eb7 I
intended to be combined, and I will reid them together.
1, 2
"The ACRS recommends that a high priority be placed on the development and implementation of I
di safety research on the behavior of light water t
5 reactors during anomalous transien ts.
The NRC may i
6 find it appropriate to develop a capability to simu-7I late a wide range of postulated transient and acci-1 l
8' dent conditions in order to gain increased insight 9
i into measure which can be taken to improve reactor 10 safety.
The ACRS wishes to reiterate its previous r
i ll i recommendations that a high priority be given to i
12 l research to improve reactor safety."
i 13 l I guesa the thoughts there--
The first sentence was i
14 !
i expressed before.
The second sentence is saying that it may i
15 l be desirable that the Commission itself develop capability i
16 l
to study some of these points, i
And the final paragraph is reiterating earlier 18 !
recommendations on what we have come to call im= roved reactor l
19 safety as contrasted to confirmation.
COMMISSIONER GILINSKY:
When you say " simulate" do
'l l you mean experiments or computer calculations?
1
'2 ll
~
DR. CARSON:
We would have in mind there developing
'3 :l!
the comcuter capability primarily to simulate accident ccndi-l 24 "
erai aecorms. inc. l, tions, to develor an in-house capability using the--
xa.m_
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CCMMISSIONER AHEARNE:
Would this be to focus more
- p. 9 n
il
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19 I
eb a I!
on the behavior of the machine or the behavior of the coerator?
i 2l DR. CARBON:
I think it would be aimed more at the 3
lb machine itself.
4' i
i 4
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7 I
at i
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10 l
11 l 12
- 1 1
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20 21.
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23
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COMMISSIONER GILINSKY:
Is this within the i
2 ll capabilities of the codes we have?
Is it juct a matter of not 2
having programmed them for these cases, or dces it require 4
some extension of the present computational capability?
l 5,
DR. CARBCN:
I think the main point we would be l
1 6'
making is that we would urge more simulation, more calculations;,
l 7l more studies be carried out in house by the staff rather than i
8, relying perhaps as much as vendors, as has been the case in 9'
the past.
I 10,
DR. OKRENT:
If I could add to that:--
As far as 11 we can tell from the discussion so f ar, the vendors themselves i
12 have done only a limited amount of study of what you might 13 !
call anomalous transients.
They've really studied those they l
i 14 l anticipate, those they need to report in the FSAR.
But if I
i 15 you start asking what if you leave a valve closed, or scmething i
16 opened, or so forth, then one might in f act arrive at a transi-
- l
.I 17' ent that generates hydrogen in a closed system and then be i
18 !
forced to ask yourself, Where do I go f om here?
19 I think this is one example.
20 COMIISSIGNER AHEARNE :
But to get back to Vic's 21, question, even if you go to the vendors, are these simulations d
22 :j within the current code capabilities, or are you recommending 1
23 l something that will require extensive additional code development:
t I
2d l D R.
CARBON:
Our immediate recommendation is to cs F*Cerai Recorters. Inc.,i 25 use existing codes, qq
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LU 4
l 21
.I l
4 wb2 I
DR. OKRENT:
I guess you have to go beyond 4 hat i
!I 2!
you now have in-house 3
DR. CARSON:
To carry out some of the things we 4
4 recommended in general.
5 DR. SHEWMON:
On the other hand, 'for some of the 6
small leaks the system responds very slowly, and those can be 7
done on the back of an envelope by one of our consultants, i
8 the ones that surveyed them.
They require less sophistication 9
than for fast action.
l 10 COMMISSIONER GILINSKY:
I see you looking at your II I watch.
12 '
DR. CARBON:
I must release the people.
1 I3 May I jump to the bottom of page 4? The last para-I I4 l graph is the next one.
IS '
" Consideration should be given ts ae l
16, desirability of additional equipment status monitor-alf I7, ing on various engineered safeguards features and t
18 their supporting services to nelp assure their 19 availability at all times."
20 ]
What we 're aiming at there is the thought of having 21 important equipment, the status of it, monitored and perhaps l
,, 'ln disclaved in the control room to the operator, so that he can 23 'ji more readily know what the status of the important equipment i,
24 4s.
n.s r, ras Recorrets, Inc.
e ec l Our last paragraph is immediately above.
We're j
g, i
/ l.
LdJ r
i i
22 1
i
\\
l 1
i wb3 I!
continuing our review and hope to be deriving further advice I
2h as it is developing.
COMMISSIONER GILIUSKY:
I see you rising from your 4
chairs.
I expect we 're going to have some questions on this, i
5
- hat I guess is an informal working paper at this point.
S' EWMON :
It's a non-letter.
6' DR.
d 7{
COMMISSIONER GILINSKY:
As the Commissioners t
3 develop their questions we will co=municate them back to you I
9 and look forward to meeting with you again and getting a reply.
10 DR. CASSON:
We're truly sorry to leave now, but i
II it's a matter of go today or leave next week.
12 ;
COMMISSIONER GILINSKY:
We 're at the mercy of the I3 !
airlines.
i Id Well, thank you very much, Max.
15 The meeting is recessed.
16 ]
(Whereupon the Joint Meeting was recessed at i
I7 4:05 p.m.;
18 '
19 1
20 f i
i 21 1
'I 22,
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CT 58v:fral A *OOrffr3. Inc.,,
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