ML20128F017

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Lists ACRS Questions Re Brookwood & Millstone Point Reactor Pressure Vessels to Be Discussed at Forthcoming Subcommittee Meetings
ML20128F017
Person / Time
Site: Millstone  Dominion icon.png
Issue date: 02/17/1966
From: Fraley R
Advisory Committee on Reactor Safeguards
To:
Advisory Committee on Reactor Safeguards
Shared Package
ML20125A422 List:
References
FOIA-92-198 NUDOCS 9212080234
Download: ML20128F017 (2)
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' 06 ADVISORY COMMITTEE ON REACTOR SAFEGUARDS UNITED STATES ATOMIC ENERGY COMMISSION WAsHlNGTON. O.C. 20149 February 17, 1966 MEMORANDlH To
Filea (Brookwoo / 111 stone Point)

From  : R. F. Frale , xecutive Secretary - ACRS

Subject:

ACRS QUESTIONS RELATING TO BROOKWOOD AND MILLSTONE POINT REACTOR PRESSURE VESSELS At the 70th ACRS Meeting it was agreed that the "following" questions relating to teactor pressure vessels should be transmitted orally to the Regulatory Staff for transmittal to the Brookwood and Millstone Point groups as items which they should be prepared to discuss at forthcoming Subcommittee meetings on these pro-jects.

On February 14, 1966 1. trat.smitted the following questions by telecon to E. G. Care.

1) Discuss the consequences of various reactor head and bolting failures. This should include a discussion of the fraction of the head weight / impact energy that the containment could withstand (taking credit for appropriate protective barriers) without impair-ment of the containment function. What would have to be done to contain the full head weight / impact energy. Examples of failure types which might be '

considered include a simultaneous failure of all bolts, " zipper" type bolt failure, brittle failure of the head, etc. Comments concerning the proba-bility of these various types of failure should also be included.

2) Discuss the consequences of a longitudinal pressure vessel failure and what would have to be dc.'e to prevent impairment of the containment function.

Discuss the probability of this type failure.

The following additional topic suggested by Dr. Newson was also discussed with Mr. Case.

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To: Files February 17, 1966

3) Can vital systems (e.g., cooling systems necessary to maintain containment integrity) be relied on under accident conditions (e.g.,  !

largest pipe break)?

I also indic ated t;9 Point group ',hould be prepared to discusi,p56br9MS - questions fthat romthe theHillstone list developed on Brookwood (R. F. Fraley memo to E. G. C3se dated Jan. 28, 1966). Mr. Case expressed some reluctance to pass on questions of this nature received orally from the ACRS. I advised Mr. Case that this telecon was an attempt to expedite preparation for the Subconsnit tee meetings, especially on Millstone Point (scheduled for Feb. 18, 1966) and indicated that most*

of these questions would be confirmed in writing.

l l

(* those appropriate questions from the lis t developed f or Brookwood)

Mr. Case indicated that he would discuss this matter with Dr. Doan. On Wednesday morning, Feb. 16, 1966, Hr. Case indicated that he had recein i approval to transmit these questions to Hillstone Point orally and would do so.

Copy: All ACRS Members

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Preiset At11etees.,Patat-(H!lietone Recleer Power 4ee,tg

itetus ,qametree4(_oe Per= Q .tev13 sacharewd The Willetone Potet Sebeemnittes viatied the site of the proposed Millstees gesteer Power staties en Jety 6, IMS.

la its July 19,1MS 1stter, to11eetag rettee of the pre.

Peeed ette, the Countttee semeluded that the site was neceptable for a 2300 *(t) pressorised er betites water reester, if adequate contatseems and aegineered safeguards are provided.

Ce poveder 15, IMS, att11stees filed me applisatian for a seestrwet tem permit stah wee aseewied by the Destam and Anotysie kapert for the reactor. This was felleued by a takht111stees Potat meettag on Dee oder 12 and 33,1MS se emesider the gplicattee, and a set of amb queettene see embeequently fereerded to the applicant om Jammary 14, 1M6 Tbs reply to these queettees wee resetved by the ARE em Pubewery 3, IM6 aRL plans to submit (to report regardias the projeet to the Acts within the emmt feu dare, and DEL and the appitaaet desire that the projoet be seasidered at the Nereb, the Acts meettas. The tentat(ve sabedule for the regulatory presses, estead to between the 9th Staff and the applisant, contemplates the Lasemese of a esestruction permit se June 1, IM6.

l Qweet(gggs A. The ACES questtaas en treebeeed booe been forwarded /

to the M111staan potat ersamisatten by uth. The M111 stems Potat group bee been regeested to be prepared to diesess these queettene, as they pertata to the titlistees Westear Power Stattea, at abto Sebeemestsee seettag. A espy ei the Breehamed guastasas to attembed anang wtab eeemente se thees questimes dere appilaability to willetees Potas appeare

! questionable.

5. Atee attasbo4 is a espy ei a menorandem settLag forth addit %1 items enesernias reester preteere veeest fattere did the M111staas potat group has been regemeted l to be prepared to disones. These geestians were diseaseed and agreed an at the Palmanry 1M6 Acts meet tag.

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.1 1. Vbet to tbe probabi1ity that a enta eteen line break er other aseident might settepee the reester bette-Y. ins and disrupt the eteatriset power eyotee mueb that one

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ef abe esetaasred sefeswerde weeld be pru14e4f What to the prebebility thee en easident night fitt the reester buildtes with steem and ehert out the stestrieel erstee or egetpmees ee that the anstaaered eefegeerde are rendered inoperstIvef

2. What are the someequemees if the sontrol rode wre all withdrawn et the same time ese te a fatters to the tastrwese6etten er drive systems for the redef Can the er**eure vesee1 withetand this eseidont t
3. What setten veeld be tehen ta the evoet the stemd-by diesel generater were fewnd to be temperative durtes ruster operetteef WL11 the remeter be shot essa if the seeereter ees en be ropetrod w(this a short pertad af timef 4 Will the overpower scree set point be 1ewered der-tag steretten wink partiet restreutetime flee to metatata se seeeptable burmaet rette et the overpewer eeren oot potat!

New witL tbte be esses,11ebedt February 17, 1964 omcr > . .. _ . . . . . ... .. . . . . , , . . . . , , ,, _ , , . . , , , , , _ , _,,_,,,,,_ ,

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CoreerTS 12 CARDING AFPt.3CA8ILITY Or la00EWOOD QWe871858 TO TB ALIJTRP01M NCILITT Lvest_ tem We, ha (Esferensee are to Design and ametysta Report.)

l-3 page A t-3 et W No.1 Ladtsates that the meat.

emme empeoure that the veneel will reestve over (to 40 year itfe will shif t the Mit value a uselmum of appeestartely Spa F. It appears that ust seasidere-times art of statmet eensees and that these queettene are est particularly appitamble to the Milleteen potes reester.

10 the M111stene point roaster will met beve a positive moderater tagerature er weid seefitotant at operet. l tag temperature. It vt11 have a slight poettive tosperature soeffisteet at ashtama tasperature with a hiah berum, presses. (see risese se am vetene it.)

The *== sensedeus margia appears to be shout 11 if a red smeet be withdraum when the remeter to obet deus. The adegeneer of this hh margia midt be '

disasseed steeg with the aosime uhtah at$ be taken if the reaster besans eriatsat at a ttas when the head te off and me addittomat eenteel rede saa be to-sorted late the remeter.

11 teforestlee rasardtag the toppler eseffistaat te yresented begtantas se pages III.)-I and IIV.S 1 of Volamo 1. Os statue that the topptar Seefftetens they have weed is senservettve.

j 12 The reforense to a poeiaive moderecer eseifLatems to the first saatanee should be deleted. Otherviza the questLas to reensaatly app 11eable.

13 Some ladevasties regardias miestles uttah are pow-l tested agatant to gives se page A-14 et Assedewet No. 1.

l l 14 Not appliaable.

l 15 Da page A-14 and ~5 et Ah me.1. it to re-i perted that analyses perfeeund thee far show as l

stestf taaet seures ef additlamel remettvity due te feel nottea.

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Gmemeatp Ossetken Be.

I le taferisettan resardias pipe dippias is prosessed starttas em pase 4-1 3 of A h t me. 1.

20 en pese 111-4-1 of Volume 1, it is stated thee the mentase eats velds to the emelaas will be 76 vetune peroamt.

22 on pese A-4-19 et Annedesma me. 1, it is eletmed that the artterten is ass.

17 teatrentattes Ftse Centret Spotes' obes14 he sabetituted for automette samareller '.

j 24 Cataetrophis ' shastd be deleted and ' red worth mistelser

  • ewbotituted for ' red programmer . I 19 Bos app 1&easlef 30 telete (enly a elegte result has been prenanted.)"-

31 Some Latorunaime velasles to testattem of the Trevettas tesore probe Systen La precessed is the table en pees V-1-14 ef Tetume 1.

31 tot app 11sabis.

33 Dr. Mages ta to provide almilar geesttees, app 11 sable '

to Milletene potes, by telephone se Friday moratas, tabruary 14, 1964.

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