ML20118D349
| ML20118D349 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 12/28/1965 |
| From: | Wilcox R Advisory Committee on Reactor Safeguards |
| To: | Advisory Committee on Reactor Safeguards |
| Shared Package | |
| ML093631134 | List:
|
| References | |
| ACRS-GENERAL, NUDOCS 9210120136 | |
| Download: ML20118D349 (7) | |
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E. E. Wileen, Assistant to Executive Secretary ACES Subjestt DEL-CONSOLIDATED EDISC# CO. METING CONCEMDIG IMDIAN POIIrf 2 ELD AT BE11tE8DA, MARYLAND 0E NOVEMEER 2,1H3 The purpose oi this seeting was ta bold a preliminary discuseion of the reaeter to be proposed for Indian Point 2 prior to the forant submittal of a construction permit application.
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Censolidated Edison Co.
T. J. Thearson W. D. Crawford E. Etherington R. W. Dierums R. R. Wilcon, Staff J. M. Driscoll W. J. Cahill Divisies of Beaulation J. A. Preste11e Mr. Creven M. M. Name M. Eisenbed, Consultant
- 3. Davideos, Consultant Divistae of Reseter Licensten LeBoeuf. Lamb & Leiby
- 1. L. Deem, R. 8. h1yd A. E. Upton D.1. lits 11er E. B. Thomas F. E. Morian M. Baees United Engineers f. Constructore Division of Safety st=ad*rds R. O. Imhoff
- 1. J. Impers Westinabouse Electric Corp.
R. L. Rusee MYtekee of Ceuap11aese L. s. Tong
- 1. A. Wissenema L. Rorablish R. L. Richels h O')Q h C
M. J. Cordia 2,
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RIN:vb 9210120136 920520 PDR ORG NRCHIST PD{
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4 Dr. Doan indiaated that this was a Preliminary information meeting sinse as l
appliestian had as yet been filed.
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Mr. Crawford stated that com Ed was devoted to metropolttaa siting and teoks I
forward to the day when this can be done. However, based om discussions with the ABC, Coe Ed is convinsed that,this is not possible befors 1972 or 1973.
1 Coe Ed has rum inte delays on its Cornwall (pumped storage) project of more i
than two years. Can Ed, therefore, will need more power in May 1969. It ist souriaeed that se eatension of ladian Point is the east economical and pree.
4 tisA1 approach. Nro is already a reacter there. A Westinghouse FW1 bas been seleeted for Unit 2 sad its characteristics are believed to be well knous. It is a "somewhat larger Comm. Yaakee 4-toop destas. No novel regu-d l
1 story problems are anticipated. To expedite matters, con Ed asked for a prettatamry meettas to see what the probleugnight be. Con Ed exposted to file formal application in two-three weeks.
l Mr. Cahill stated that the new unit would be located just north of Indian Point 1.
peakskill is the nearest populaties center.
Population distribu.
tfan and growth were beias intensively studied. Population within five miles is 58,0003 within 15 mitee 419,000. A 50% increase is expoeted in the nang 20 years.
N rascter will be rated at 275416f(t).
It will have a 3 region core for fuel cycling purposes. The fuel will be low enriched U02 clad with Zirealoy..
The power coefficient will be negatite.
It will be designed so that no credia ble asesreien will danese the cooling systems er safeguards.
Primary pumps will be es the " controlled Isakage" type. The system will be wesigned for 2485 peig, 650' F service. N Asas boiler code will be observed.
All parts is centset with primary soolant will be of sustenitic stainless steel, except the Zirealey fuel clad amo lacenet steam generators. The rase-ter vessel will be of A 302 Grade B carbos steel. Surveillance specimens will be provided.
Soria asiJ chemical shim will be used for roaster control along with "RCC" type centrut rode. N systew is to be espable of responding to a 101 step or St/mia ramp chamse of power. There will be a 1% minimum shutdown margin.
N IuBR is to be above 1.3, sad there is te be as fuel danese in transients.
There will be in-core monitorias of fium and temperature. Conn. Taekee's Israt was stated to be 1.25 using the W-2 correlatime,1.3 using W-3.
"As applisation for ladian Pelat 2 was subsegmently filed on December 6, 1965. Copies were distributed to ACES mead >ers on December 10, 1965.
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The lhedeen River will be trastosi as if it were a drinking water supply, sed-10 CFR Part 20 requirements will be observed. Casseus releases will be diluted se as to be less than 10 CFR 20 requirements for breathing.
N WCA will be sonsidered to be a pipe rupture with loss of outside power.
Emergency power sources will take cars of the needed safeguards and bring about an orderly shatdown.
Unit 2 v111 be very close to Unit 1 se as to leave space for future units on the site.
N two ustts will be well protested from each other by desiga..
Unit 1 is presamtly down for several months for refueling. Unit 2 will have as oil-fired superheater, as does Unit 1.
One superintendest would be reopensible for bet.h units. Some of tbs site staff would be common to both units.
Dr. Deem asked La what wey the propeeed design accommodates the higher poputa-tion and higher power, e.g., was fusi storage to be outside the containmentt Be regnested a detailed analytical discussion of this site and the people around, siese it has some metropolitas inattacts. Off hand, it looked as if asthing had beau done here that would sot be does for a remote locatisa.
Mr. Cahill stated that the containment would have double penetrations.
Buffer pressure would be used on pipe peastrations. He indicated that this was beyond -
meren.1 containment design and that penetrations were the most likely place for leakage.
Since the populaties is worse, Dr. Dean asked whether the containment was better er worse than that proposed fur Halibe.
- k. Wiesamens stated that the Halibu sita required accase to withis 50 feet.
Dr. Theapees asked whether Westingheese had changed its containerat isolaties criterios (ref. vol. 2 of the 10/1/65 " Description and safety Analysis" report, see. 4.1-4).
- k. Wiesmeena stated that it represented me change, but was na attemps to state the criteries being used for other Westinghouse reaeters.
N proposed intake for New York City drinking water is 30 milae up the Rudoes River from Indian Feint, at Chelsea. N river at Indian Point is saline.
A relatively email amount of water would be takta out at Chelsea.
Dr. Hama stated that the objective is to show that 0.17, leakage is acasptable.
Most ocears at posetrations.
sines the shall has to be depended upeo, he wondered how they eeuld tall it it is that good without tasting the shalt.
Na indicated that expensive shutdown might have to be balanced against doubla
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' ter. Niabels stated that engistered safeguards would be provided to snaistain
===*atamaae integrity, reduca driving pressure, and remove fission products.
The intent is te meet Part 100 with me off site power available.
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t Mr. Cordia stated that pe ep. ainosat would be designed fee 47 psi and would have a volume of 2.6x10 ft.
It will be of reinfersed comerste with a atee1 liner. It will be atroeturally eimilar to Connecticut Yankee.
i The safety lajection systoe will contain a separate set of three high head pwape. It will be designed to prevens core meltima and sitcomium-water reacties for tha break of the larg6st connectim line to the primary systen.
The rystem will supplenemt the two charging pumpe. There will also be two low hand resideal hast removat pumps which will injest water into the evtlet liase. All pwspe will taka sustion from the berated water storage tank.
Two separate pumps will be soployM La the containment spray eyeten. Contain-meet air will be circulated through filters and coolers. The second peak of containment pressuzs after the maximum accident would be 44-3/4 psi.
Dr. Does indicated that IRL and ACES would look at the reactor system itself to ese that meltdown is prevented for all including the biggest rupture. Then,'
tbs watainment is pet around it in order that there be protection even if the othere fail, and metal.wster reactions occur.
Dr. Dean indleated that it was me more credible that aafeguards La the contain-meet work than those in the primary systein, but he believed that the contata.
ment had to be desigmod to costata something.
Mr. Wissemana stated that this had been done; that the containneet was satta.
fastery if the safety injoettoa system does not work at all. A low head pump will be available with high reliability, but this is not being de;iended os for containment integrity.
Vestingheere showed some containment pressure vs. time curves for the maximum l
easident. With safety Lajecties, contataosat pressure reached a peak of 44 l
Pe t.
Without safety injecttme, a lower peak pressure was caleutated.
(A Zr-5 0 reestion was assumed. Rydrogee was aAsumed to burn as it came off.)
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Cers overheating and melting kkrough the roastor vessel was not considered.
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Mr. Wiesammam cosueented that Westingbeuse had used an updated computer code.
l free the simple one used for Halibu. The Malibu calculations had added in l
decay heat as it went along. Westieghousa now says that decay hast cannot go into both metal-water resettee and the containment. The Conn. Ysakse cata estatimes eers stated to be too conservative and non-realistic.
In the San Omefts case, Westinghouse leeked at the rate of boil-off below the aere. It feesd that insufficieet haat removal could be obtained via this i
meekanias. The metal-weter roasties would be steam limited for rart of the time, bet the ranstise would continue.
Mr. Etheringtse pointed out that eitbar the water would be hasted to seems se the fuel weeld heat up and sett threugh the reactor vessel. Westinghouse W itted17 L.2
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Mr. Wisemame meted that the situation wee better if elastria power is avail-able. Coeltag unset be provided to head off a lees tern problem. The objoe.
tive is te keep the sere in the veseet.
Dr. Theapesa meted that coastete has certain di4 advantages for a sentainment yessel, and thet one is that the appitaaes unset demonstrata that it is always possible to remove heat. He suggested seus seneideration as to whether this is the best sentatasses.
W. Wies'same felt that time would be avoitable af ter e
an aseidentI elastria poser might beoems avetlable.
Dr. Thompoem indiested that injesties of veter wee very igertant. Es stressed the igertanee of safeguarde der this site, which is eleoe enough to the center of a city.
- k. Wiesemana commented that for tus bours after the assident, the cenerete was still heating up. there wee further discussien; et the sequense of events after an assident. ter. Diessen alas questianas Westingboues on this, parties-larly is regard to whether to push the eocling buttes or met, etc. Mr.
Wiesammen indieeted that, af ter blevdeen, he wee pretty sure the water teret voeld be belas the sere. If it is higher thms this, there would be significant sere eselias and lese metal water reestion. The LOOD code used by Westiesbeuse wee stated to be conservative, i.e., the calculated water level is lower than it would estus11y be. There wee brief further discuseise of the merits of adding water vs. not adding it.
Br. Thoupeem pJiated out that a credibles recativity encident wee not assumed possible. Be felt that this destga wee cleos to providiot absolute certainty of this. The destga, bewever, neede seestking _to work inside the oestainment.
Be, therefore, asked dy cooling eeuld met be assured by first blowing out stems and water. If the assident is sequential. he questiamed the need for eestainemet. The hoy questime, he felt, wee "What should esatainment really det" Es mentissed the eredibility of a pressure veneel failure as one problems.
Miselles seald violate the ca===4====m.
The choice and salestion of really good amatainment is the meet isportant stagle aboies in butiding a reacter.
Be suggested that the ladies point 3 proposai asight not be even en the right treek, from either the oest er safety viewpoint. He urged the prospective appliaamt to give some thought to this. Westiashouse agreed to censider this.
Weeslaghouse felt that this remeter needed only a faster of 4 or 5 redmoties to meet le Cpt 100 regeiraments at this site. This was queettooed by Dr. Does.
Dr. Deem indiaeted that more inforentian wee needed than saw was available es -
what the restreulation filters vill de, e.g., with methyl iodide. Mr.
Wiesammma adentted that this would have to be dememetrated. He noted that Beweatas (CE5Q hee resemtly been able to celleet methyl iodide by doping
~ filters with elemental iodine and alas with another chemical. He felt that-the filters were there, bewever, becesse of the tambility to prev 64. they de aos have to be there.
1er. Wisemaman argued that the does weeld be reduesd by a faster of three pesames one teenage mete. w. co pass tarouge tasa eracas in can concrose.
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t Mr. h11er commented that be was instined to say that there would be 0.11/dar laakage thsough some path. Mr. Wiesea2am agreed to furnish a ausber few the
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reduction fastor needed for Indian Point 2 to meet 10 CFR 100.
Dr. Thompees rged that con Ed be sure that it is spending its money wisely.
He asked if csre was say rassos that the containen.ats of Units 1 and 2 oeu14 not be tied tagether os se to make.ues of the satra Unit i velues.
He quali-fiad the soggestion as a personal one, ubiah he was not sure would pass the Acas. Westiashouse indicated that there wee a ground rule that the other plant meet remain operable. Mr. Craeford indicated that Ces Ed had tried te keep the two plaats separate.
Dr. Sempeen noted that a large tunnel could connect the two containnemas.
Es felt that a steel shall could lead to a usere assured redestime in pressured,.
Mr. Crorferd wondered if this would be seere applicable in a city.
Dr. Thoupeon indicated thw the closer to a city, the isors worry there is about a WAss-740 tyya accident. He felt that radical changes might be needed se as to assure intetrity under all circumstances, e.5.. P pe break, pressure vessel 114.
i He a6aia suggested rethinking. Clearly, the accident analysis needed extend =
ing. Mr. cr Mord exFreesed concern for the May 1969 start-up date.
Dr. Deem metae *. hat the plant was 65 bigger, that population was up, and that there is, therefore, a different set of problems at Indian Point than at Raddas (Coes. Yankee).
He noted that this wee not really a provem reactor type yet. Small PWR's have had some failures. He wee mot, prepared to say new senat to de to take reestore la big citime. He noted that interlocks de not alvsys interlock and that taelatima valves sometimes fail.
Dr. Doom +===== red that Coom. Taekaa had a large low population zone distanse, seeams at Indian Point, it was proposed to be at the site boundary.
Westinghomme had analysed two eases, both of whin reportedly uset 10 CFR 100 at the sits beendary:
1.
All iodine removed by filters in two hours.
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31 of the iodine as instkyl iodide met removed at all.
1er. Eisenhed felt that in 21/2 yeare, a system comid be designed to remova 91> 9M of the iodine. Dr. Mama commesAed on the desirability of continuous sanitectos ame pertadis leak rate testing. Westinghouse noted that the M ibv. type oestainuras was empensive.
Dr. Been M mmend that eita suitability had to be established at the soe-streetten permit etack There meet, therefore, be little doubt about the sentasaneet, sissa it is essential to the adequaay of a site.
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4-Mr. Crawford indicated that the ABC comosets were helpful, that Can Ed would consider them, add that suggestions wauld be incorporated in the formai applicacias.
Dr. Dean indicated agreement that it was the time for creative thtaking. De, Hans suggested that there might be substantive problems relative to siting.
He urged Ces Ed to provide the basis for wtry something is ~sden, why it is that way, dat the margia is, and
- y it is all right. Dr. Dean urged Ces Ed to state what this site requiree and whyl thesee to state carefully thought out design critaria.
Mr. Craerford stated an intent to submit the applicaties in three weeks, or else to delay until the design is os fira ground with something Com Ed feels is acceptable.
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