ML19220C677

Forwards Portion of Bellefonte Subcommittee Meeting Transcript Questioning Whether Operator Could Diagnose Accident & Assess Core Status

ML19220C677
Person / Time
Site:	Crane, Bellefonte
Issue date:	04/05/1979
From:	Bender M Advisory Committee on Reactor Safeguards
To:	Advisory Committee on Reactor Safeguards
References
ACRS-SM-0084, ACRS-SM-84, NUDOCS 7905140021
Download: ML19220C677 (13)

Text

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wAsmNGioN.o. c. 2csss Q' :t; /l 7pril 5, 1973 CH AIRM AN ACRS Mer.bers BELEFMTE SUBCCtGI'ITEE MEETI!G Enclosed for your infomation is a portion cf the Bellefonte Sut> committee meeting transcript partWnt to the discussion of

'n4I.

Bellefonte is a B&W plant.

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question raised concerned the matt er of whether an cpeator could diagnose an accident and what infomation he could use to determine the state of the core.

Note the Staff strter.ent that the Vendors gave the operator optional control of ECCS injection and that the NRC found this acceptable.

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q Ctn you chctch that quickly on the DR.1:0 LLER:

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I have a clide v:.ich vill follow I:n. Can:rI:

thic one.

D R. M 3 E L L C F.:

Gcr.': you.

pro?. KEra:

There cpparently hco been cor.c rccctor experience involving water hc~.mcr dovcicping in a high prcccurc Is thoro cnything in your injection linco, b...-uco of icchaga.

cyctcn that would prevent that, or hcvc you icched at thct Titat ic in n30 which doccriboo sono of this.

0 probic.2?

1 MR. STOIG7I:

I c:1 not fcc.ilicr with what you are I

I will ba willing to lock into'.it for the 2

talking about.

s 3

fifth.

Tha b:rctcd unter ctorcgo tcnh 10 c littic larger 4

I thou the ECCS rcculta bocc6 15 on the 205 cc you ccn occ.

For the 177, it 10 upon the intcria cuccptenco critoria.

16 17

> IL E hilot:cttu pcr fect.

tl2 vero cciculating 2300 G:grecc.,

Fcr the E;.11cfento picnt, wo cciculcto 19 30 degrcoc.

18 19 F ct 15.3G kilouatto pcr fect.

In tha E00] cntlycle., it vac deno ct 37C0, five r,creent cSovo the S(100..

23 You worc toihing nLout active an6 21 DR. MOCLLCR:

22 paccivo cyctroc.

Ac I unCorotti ~. ut, with your injcetion purpc, you ptmp frca the barcted.ctor ctoraga tank until the 23

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io rc.luced, cnd then you cuitch to t.ho rcact'r 24 voitur.2

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[12. STDIUnDe That'c carecct.

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DR. MOELLER:

this ic a Innucl cititch?

FR. STEIC:I:

This is r rectiucl trcncfcr, ycc.

DR. MOCLLER:

131ct.if you didn't tucnucily trancfer?

13:at would happon?

MR. STEII;KE:

Wall, the oporctor would gct cicrce in the control roca to tell hia he has to tche thic cetion.

if you accuco the operator tchen no cetion whctco-Of course, cver, he is going to lose cuction to hic purpo.

DR. MOELLER:

How long 6000 it take to uce up the borated water storago tank?

MR. STEI1HT:

I believe if you have both reccto::

building spray punpc running, both high precouro injcctica purpo running, which will run initicily ct their full run-o:st condi' tion -- not design, but run-out con 0ition ~ s ou havo about.100 minutcc frca the oncot of the accident to chcrc ycu hcvc to ucke a suitch-over.

I Dn. MOCLLEn:

Eut ho 6000 receive a cicac1 in tho

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control room?

MR. STOII:nt:

Yco.

Ea will rcccivo a iciu bcrcted water storage tank level clarm.

And then a lou lou borcted ctorage tank.

Dn." M0ELLER:

If no loct auction, vculd the pucpc then run cucy en him?

Cg j70 MR. STEIliRE:

Pc::hcpc Dich Chi 11taca Ceca DCU could cn:.t:Cr that qucation,

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I c.:.1 tich C::ilican frc:'. LCi?.

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I would lil.c to correct one etcLcccnt Dich juct acdc.

I I

3 0.1 full run-out follo. ting a LOCTt, the plcnt oporctorc would 4

have cpproxicately 30 cinutco before their tit 5

pin ping fron the borated acter ctorcgo ta'nt.

Tito cccond qucation that you hcd is w:1ct would happan if ycu loct

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7' cuetion on the daccy hcct pu~.

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The nurps would stop pucping.

9 PROF. ICER:

He cpccificc11y cched if tha'i would 10 g

i run away?

1 11 C. C::ILL"_?ll:

T:'.o cncucr ic no, they would not 12' They vauld etcp pu.;,ing.

T;10 hac5 wauld Cell t's run cucy,

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i 14 C2. IC;12.EE: 7.cc thcy uctc:5-ccLici?

15 C. C:*.ILil:.221:

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16 C 2. lr m 'a -

6 y eculd bur.1 up, thca7 17 10:. E1;ILL' f27:

'Iho CCal arcto of the ptr.pc crc pre -

18 vi6cd with eccling va:cr.

I dca't know whatl.cr or net the 19 ucaring riitga would g:.ve out or not.

I would cucpcot they "O

wocid, if '. cy ucro partitted to run for c. Icag porlod of 21 ti:ae e9:;uu fluid on tho cuction cido.

22 101. DTUDOR:

Tho operator knouc to do conothing, cainly bcccuc$ of cho alorta?

23 23 g

17t Ie i M R. C I:I L L -lTli s YCo, Dir.

'iho 01:0T huo chaut a g

y 50-foot active length.

Cgerctcco ccn watth the uc, tor lovel T

f t.ll during the ccutt.e of the $.: c.i(.cr.t.

L.:.u they get tc,tht.

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lou icvel point, they hnou they cre ct c pcint chcrc thEy 2

3 b' tter anticipate doing conothing.

Concurrcne with L D c d'

a containc. nt sung icycl that ic incrcccing, i~ hen thcy get 5I the cocond alam on the E::CC', it in tito to chcngc over 0

II. EE! DER:

If thcy dcn't do cc thing whct t

f happens, acido froa the pur? not purping? rhct ic the ultit ti 7

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recult?

13. C:'!LI.!?2!:

1::y I cch thct ycu arc Iccding 9

10 towards?

p; II

13. DE::t:n Juct trying to ccc the conrco cf the 12 accid:nt.

It tcy turn out vc tay not like the idcc cf juct 13 relying on the operator'c judge.cnt cc to whct to do ncnt.

Id im. C::ILIl227:

The encwcr t.o your questien ic vou 15 terr.incto the reficod.

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16 2:2. ES::0:n:

So ycu daa't 1. va ciegasto ecoling?

I 37 F.n. Ei ILIl;.'JJ:

I uculd.1't c y you ucu1CT.'t hcVe 18 ado.2ucto cooling.

I will ecy you uculdn't have a rcficod.

65 19 Ycu ctill hcva the high pecccuro f.njcation pumpc pu.;.ing.

W6 ).

'Iitit arc teni'.ng to run out, but they arc ctill purging and le 23 21 delivering flow to tha reactor coc<lcat cyctc:a.

22 tm. CC::DCn:

Thct buyo you coro tico?

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2d I:n. EDt!DCn:

Uill it buy you cnough t!co to tertin-

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to tho t..b.c cecident in cuch a ucy that, thoro 10 no dang :

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I ca not quclificd to encccr thct 3 l;'

I qacstion.

I don't know.

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Ma. EC::0:n I think the Stcff occht to tckc c loch 1

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ct thic.

It ic cicar that th0rc 1c a fcir casunt of tico N,

for tha opercP.or to do comething.

It io nico clocr the p

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cporctor hac a let of thingc to think chout.

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MR. D.WIS :

Wo have looked ct thic.

Our -- thic h

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plcnt tacts our criteria.

Wo -- when thcy ccy ccnucl, it ic l

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nanual, at a cyctcuc 1cyc1 kind of conccpt.

I tm tc1hing a

II about rtmning around*doing anyuiing.

It 10 c cctter of 12 :! puching a butten.

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M3. E;;;C:n:

It 10 a c tter of trying to decido 14 l' to do the right thing 7 ISP 1*n. D.WIC :

That's correct.

D.cre 10 csco cetica i:

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required.

Hick.crically pceplo have, at 1cact co=c I7 vendcro hcvc chocca to lecyc the Eciclon to tha o,)cretoro 10;l to go frca injcation frca thchte ' t MO-ren-cg' Mnh to i

I 9 ;' recirculctien, widt the crerator, not cu':cc to the cyctca.

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In thic currcut otcgc, WO alco find it t.cceptcblo f

I h2 [, to do that.

f si-23 E, 1 3. E C: D DIL Okay.

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99 173 (n /! eI 24.i Any furth:r quoctionc?

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120 I vculd like to hecr, pcch:;c ct the r.c::t r,zctintj,30t c 2 nil i

t 1 f scr.r.ry of whct Lcppc:.c if the cpcrcter doccr.'t fclics 2

3 through cith the prepcr ccqucnco.

4 Mn. Dr.VIC:

til, I -- tkrc hcco't bccn cny 5

c::?1icit cciculcticac.

I think eno cculo c:cici:1y ccictiche 6

the conocqucacco in terr.c of houro.

I thirJ: you eculd 1ccc y

the water in the veccol.

I thirJ: cccercoly ycur high proccuro injection p cp would probchly ccvitctc ct the cac.c 0

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tir.a your lou proccure pr;c vculo,or clocely thriTcfter.

g 10 I don't kneu cny rccccn why thcy wsuid run cnd the 6cccy 11 p=;c would not.

12 K2. C::ILL!.A*1:

Cict'a correct.

Elcy will ccvitcto 13 to a otop.

14 rn. D.VIC:

0;ca ycu hcvc cc 2 icngth cf tit:3 bef.rc the uctcr in the veccci bollo cIf; ccd then you cre left IS 16 vith no uctcr in tha veccci, cnd I think it to juct a hect-up 1

17 trcncient until ycu eccch a citectica where, you kr.:,u, l

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10. ECI:I 2s Ycu-cli egeco it 10 hind of a fcr- _

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23 fctchcd ceciCcr.B in tho firct picc0 cr.S tho oporctor cught u-

_1 to ho pretty c:crt cnd otL t to hc'rc t.l;o ccaco to do corcthing i h

21 I

22, ctcut it if yo: hcro a hn19 cn houn to do ocacthinn?

23 ra. D'.VIO:

That 10 our philoccphy.

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T.nd vcu 0r0_th_!_n':i_na. _c_l' cut it? _

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I If thct la t.11 right, why don't we procu d the:.

2 to the nc:.:t iten which 10 the doccy hcct removel cyctea.

3 3.n. CILLCL7d:D:

Mr. Chillrc.cr. of EcU uill dicc. -

e that itcm.

3

13. Si;IL12:T.U:

I cc Cordon Chille.cn frca Echccc.~-

6

& Wilcox.

I en going to givo you a brief occeription of t?.c 7

dcccy hect rcnovel cyctca that will be caployed on the O

Bolicfonto rccetera.

E This cyctca 10 cccenticily identicci to the 10 dcccy heat removal systo::w that the Staff hea cecn on the U

other cpplicctions whero ECU n'ucicer ctoco supply cycTct:

I2 have bcon uced.

13 The cyctca 10 dcaignco prir.:rily to 2 cvc dece.y goJb[ M

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hect and sencibic heat ffcn the rccctor cacicnt cycter du i-g 45 cooldoun.

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It 10 ucco far provid[ng cc::ilicry cprey to the v

bP0 k 17 rocctor coolcnt cyctca, for coupleto deprcccuriccticn of tk IC the ror.ctor ceolent cyctca.

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W It to uccd for rctavinir irate r frcn the fuel 20 trcncfcr ccnol follouing refueling.

21 ?

PE07. 1Enn 1.11cn you cc'y identical, I cccuno 22 included uithin tho identity :.0 on incroccc in ecpacity cin:.

,U 23 the dcccy heat to bo rcCoved f.c cignificantly greater then _

24 nO::d cepxcer. s.z that in, t:cy, Ecncho Ccco, oc wo ucro tc1hing cbout ccrlicr?

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12. 01 IJJ4:f U Tho cocpencn' 0 crc cignif3cantly 99

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-1 Irrgcr to ccccunt for the contributien of dccty hect from 2

the 1crger coro.

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t r.0 7. 1:C r.n z Oct.h yc u.

I 4

fin. SI:ILL!:AN:

The dcccy hect rcnovc1 cyctcm ic j

5 the lou prcccuro injcetion cyctca.

It 10 decignco cnd 6

conctructed in conformanco with the codco cnd crit.cric cnd l

7 redundcncy that reficct its nococcity for cafcty, if you a

vill.

i 9

no reactor cccicnt cyctca 10 ccolcd frcn SCO m

i 10 degreco Fchrcnhcit, its ccro pot:Or no-locd tcr.pcrcture, to e

11 350 degreca Fchrenheit in cypro::imatby cia: houro ucing I

q 12 the atecn generators, cnd the fecd;;cter cyctem.

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13 From 500 dcgrecc Fchrcnhcit tho dcccy hect 14 rcmovc1 eyc tcn circulctcc rcceter ecc cnt t'.rcuch ito own 15 Piping.

It cccc plichcc thic cocidenE: in c'pprc;;it:tely 16 fourteen hcura.

i i

17 Tha occcy heat rc=cvc1 cyctena c::c cligned in c I

10 menner that partit rc ovc1 of deccy hect 01:. th:: ouch the 19 refueling scquence, cnd that clignment 10 cgeln intcndcd to 23 be reproccuriced cnd ottetcd.

21 fo tho -- once tho occc.y heat cedo 10 etta!

22 if you will, the cyctca io Icft c:acatially unchcnged for 23 the entiro refueling rc.odo co long co deccy heat 10 being 24 generated by the coro or cny portion of tho coro that 10 ci ce;ce:. ra:.

25 reas!ning incido the reactor vcaccl. m

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to category 1 requirements.

All essential instrufacntation

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, 17 2 wi11 be exanined as the design process progressco to determine 10 3

t.he range and the accuracy required for the instrumontation.

d That is the end of my presentation.

5 MR. B12: DER:

Could I ask a few questionc?

I'irc t 0

is the post accident monitoring cystem or instrumentation that 7

you are planning in this particular caso dif ferent fro::t that i

8 which you have provided at other plants?

9 MR. SABIll: I will have to ask Mr. Perry to answer 10 that one.

I II MR. PERRY:

I am Larry Perry, DET, TVA.

It is

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I2 essentially the same.

Haveyougivenb*onsiderationtowhat 13 MR. BE!! DER:

14, ranges are 51ccessary in -- for c::ampic -- radiation tenitoring 15 cquipment in order to' provido post accidant trenitoring 16 capability?

i 17 MR.

EnRY:

This'is being considercd, yes.

1 The ranges'as yot'have nct be'an'. sot, to lay knowicdge, 18 I

I9 as of this tima.

20 MR. I E:iDER:

You have set the:a for other plants, 21 though, have yot not?

22 MR. IERRY:

Browns Forry I a'm not familiar with.

23 MR. EE1 DER:

How about Scquoyah?

~7 7 24 h9

) d ce veen. W.

MR. FERRY:

I do not ---

,:.c 25 MR. BELVIti:

Tho ansuor to that 10 -- wa do have a radiation monitor ihich has a rango of ten to tho one to ten o

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g.o the seven nillircas por hour.

l' MR. GILLELtd1D:

They have been set.

2 MR. BE!; DER:

They have been cet? Ic the ctaff -

3 areviauing those requirements?

I can' t speak to other plcnto besidcc MR. DAVIS:

5 6the specific case here, Bellefonte.

In termo of the Bc11efonte I think the actual ranges will probably be invectigated 7

>lant,

'.t the FSAR stage, not the PSAR not now.

D Dods the -- aside from the capability MR. BCt: DER:

9 7hi'ch is being providca here to be abic -- in orderato help 10

- :he operator nanually run the plant in an accident -- I think 11 i

that is what you said -- is any capability being provided 12 g

to detornine that the accident is uithin the boundo chich 13 i

t 14 were specified?...

1 l

15 MR. SADIN:

As I montioned one of the rcquircuento i

was to help hira identify.

I think I said to identify the 1

16 departuro of tho accident from the expcEtad coquenco of 17 4

18 uvento. That 10 part of it.

I 19 MR. Bul1 DER:

Could *you determino t.ht.t all the ficcion t

product inventony was cocentially in the coro?

20 MR. ShDIll I an afraid I cra not oxport enough 21 on that particu!.ar cubject.

Thoro vill bo preocuro monitoring 22

)

and teaporaturo monitoring in the ccntainment, and thoro is 23 radiation monitc ring in the containnont.

gg 78 24 3

..s cer:cre. re.

MR. Ddt;DCRs You don't know whethor that vou 1 bo 23

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2 12 MR. SABIti:

Perhcpc coreone from P.r.M could ancuer 3

that.

4

!!R. SI;ILLMA!!:

I an not certain I really understand 5

your qucction.

I heard your words, but I don't underctand it.

6 MR. BEUDER:

I will try to clarify the question.

7 Suppoco there were core citing.

Uc don't expect corc nolting 8

to occur. Suppose there were. Wou3 d thoro be any way that we 9

could determine that it was cuch as to have driven off a fair MW 10 amount of fiscion product inventory to como other place, one II in the core, where it is suppocod'to be?

II MR. SABI:it Your radiation rbnitoring would pich 13 that up.

Id MR. SI:ILL!!Att:

Yec. There are ecveral itecc involved 15 here.

Uc -- D & U was prepared to speak to thic matter 16 at the full con aitteo recting of SMUD in Septonbor. We had II our homcwork deno then and the infernation is still good.

I 10 The rhodiuta detectora in the coro -- none of this 10 qualified 19 nor.is it protcnded to bo -- a raan on the consolo ccn got 20 o goed gut icycl feeling of what io happening in tho core by 9

21 tuo thingo.

7g 22 Tho incoro tenperaturo datoctors and tho rhodium

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23 monitors.

Tho higher tho rhodium canitora oro heated, tho g

24 more of a radiation they give you.

They drivo themoolves noro

_vare;w m su.

20 and coro into caturation.

Thoy give an incrosoingly highor

19G 17 I

readi.ig indicating this higher temperature.

The incore 2 ther ocouples doun in the fuci are reading ct -- they go off

~

at 1800 degrees or 1400 degreco or concthing like that.

The 4

fellous in the control room can get a fairly good indication 3

o hat has happened, but none of thic inctrur.cntation ic 6

qualified.

7 He can find out if he hao had a molt. Where the 8

ficcion product inventory has gone, -- I am unable to cddress 9

that.

MR. BEllDEI :

r Well, that may not be importcnt.

II I think the thrust of this wholo 3.dca is to really decide what 1~)

instrumentation is essential, to be sure the accident is within 1I bounds, and to give the operator sono basic for deciding uhat I

~

If to do if it is not.

I 15 I an just trying to got a fool for the matter right 16 now.

I don't think that we can got very for with another fev II minutca of discuccion of this.

It r.uy conc rp again.

I cugeoct 10 that if DW han dono its hopowork in connection with ccco cther reactor, that uo might find it ucciul to hear cbout, hou that 23 info: nation ro!.atos to thia ono.

2 MR. SKILL!'A!!:

Yco, cir.

22 HR. BC:JDER:

Thank you.

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