ARCHIVESHISTORIQUES
DELACOMMISSION
COLLECTION RELIEEDES
DOCUMENTS "COM"
COM(81)551
Vol.1981/0167

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concernantl'ouvertureaupublicdesarchiveshistoriquesdelaCommunauté économique
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p.1),telquemodifiéparlerèglement(CE,Euratom)n°1700/2003du22septembre2003
(JOL243du27.9.2003,p.1),cedossierestouvertaupublic.Lecaséchéant,lesdocuments
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concerningtheopeningtothepublicofthehistoricalarchivesoftheEuropeanEconomic
Community andtheEuropeanAtomicEnergyCommunity (OJL43,15.2.1983,p.1),as
amendedbyRegulation(EC,Euratom)No1700/2003of22September2003(OJL243,
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Wirtschaftsgemeinschaft undderEuropäischen Atomgemeinschaft (ABI.L43vom15.2.1983,
S.1),geändertdurchdieVerordnung (EG,Euratom)Nr.1700/2003vom22.September2003
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dergenanntenVerordnungfreigegeben.

COMMISSIE VANDEEUROPESE GEMEENSCHAPPEN
REGELING TUSSENDEUNITEDSTATESNUCLEAR REGULATORY COMMISSION
(USNRC)ENDECOMMISSIE VANDEEUROPESE GEMEENSCHAPPEN NAMENS
DEEUROPESE GEMEENSCHAP VOORATOOMENERGIE (EURATOM)METBETREK­
KINGTOTIN-PILESIMULERING VANONGEVALLEN METKOELMIDDELVERLIES
(LOCA)BIJDELICHT-WATERREACTOR (LWR)COM(81)551 def
Brussei .1October1981
jrvV^ \
M '1^-\L«•*.«U>-\> I
v
/81l
(Mededeling vandeCommissie aandeRaad)
COM(81)551def.

BETREFT :Regeling tussen deUnited States Nuclear Regulatory Commiss.ion
(USNRC )endeCommissife vandeEuropese Gemeenschappen namens
deEuropese Gemeenschap voor Atoomenergie (EURATOM )met
betrekking totin-pile simulering vanongevallen metkoelmiddelverlies
(LOCA )bijdelicht-waterreactor (LWR )
1.Het lopende meerjarenprogramma van onderzoek 1980-1983 van hetGemeen­
schappelijk céntrum voor onderzoek (GCO ),waartoe door deRaad op
13maart 1980 (1)werd .besloten ,omvat hetSuper -SARA-projeetdat
moet ,worden uitgevoerd bijdeESSOR-reactor vandeinrichting teIspra
enkanworden beschouwd alsdemeest significante bijdrage -tot .het
veiligheidsonderzoek voor deLWR inhetkader vanditprogramma .
Eenvandevoornaamste doelstellingen vanditprojett isdoor middel
"vansimulering indereactor (in-pile )hetgedrag vansplijtstoffen
bijongevallen metkoelmiddelverlies teonderzoeken .
Ditonderdeel vanhetveiligheidsonderzoek' voor deLWR isinternationaal
eenbelangrijke prioyiteit ,metname nahetincident vanThree Mile Island
,(TMI)indeVerenigde Staten op28maart 1979 .
.2.Gedurende ,debesprekingen dietothetbesluit over hetlopende meerjar^n -
programma van hetGCOhebben geleid heeft deRaad steeds denadruk
gelegd ophetbelang vaninternationale samenwerking bijhetSuper-SARA -
project .DeRaad werd ertentijde vanditbesluit vaninkennis gesteld ,
datdeCommissie metdeUSNRC onderhandelingen over zo'n eventuele samen­
werking hadaangeknoopt endat ermetdeinnatura teverstrekken
bijdrage vandeUSNRC alrekening wasgehouden bijderaming vande
kosten diehetproject voor deGemeenschap zoumeebrengen (2). 1
3.DeRaad werd tevens geïnformeerd over hetVerdere verloop vande :
onderhandelingen vandeCommissie metdeUSNRC in1980 indemededeling
vandeCommissie aandeRaad m.b.t .detenuitvo-erleggiag vandeeerste
fase (1980 )vanhetSuper -SARA-projeet (3).Toen deRaad eenbesluit nam
over detweede fase vanhetproject (1981-1983 ),namhijerwederom
akte van'datdewaarde vandeteverwachten bijdrage innatura vande
USNRC wasingecalculeerd indevoor deGemeenschap geraamde kosten van
hetproject (4).
(1)PBNr.272van 18maart 1980 ,blz .11
(2)Document vandeRaad 5422 /80(ATO31)van'4maart 1980 ,blz .3
(3)C0M(80)750 def .van27november 1980 ,blz .40
(4)Document vandeRaad 7107/81(ATO46)van 19mei1981 ,blz .3

4.Tegelijkertijd werden het .Comité programmabeheer "Reactorveiligheid
enhetAlgemeen raadgevend comité van hetGCOvolledig opdehoogte
gehouden vanhetverloop vandeondbehandeling envandeCommissie met
deUSNRC . .
5.'Deze onderhandelingen hebben nugeresulteerd indetekst van een
voor beide partijen aanvaardbare ontwerpovereenkomst (indevorm van
eenregeling )metbijlagen .Behalve dathetgebruik .vaninformatie
enoctrooien tussen detwee partijen wordt geregeld (artikel 5),zijn de
voornaamste punten alsvolgt r
-deUSNRC stelt EURATOM derelevante informatie over hetUSPBF -expeiriment
1terbeschikking (artikel 3).DeTask Force voor Suoer-SARA dieinjuni 80
door deCommissie werd opgericht omhaar technische bijstand teverlenen
bijdeomschrijving vandedoelstellingen vanhetSuper -SARA -programma
endeverbinding tussen ditproject enandere gerelateerde experimenten
teverzekeren ,onderkende hetbelang vanhetPBF-experiment indit
verband evenals hetfeit dat ervoor moest worden gezorgd ,datdeze
twee .projecten elkaar konden aanvullen enbevestigen ,speciaal door
hetpoolen van informatie (5):
, \ »
–deUSNRC stelt debijdrage ^innatura diezijaanhetproject zalleveren
.(bijlage 3)opeerljaarlijks niveau datgrosso modo wordt geraamd opeen
equivalent vanminimaal US#(19Ö1 )1,5miljoen ,xbehoudens verdere jaar­
lijkse financiële toewijzingen voor hetproject vanhetAmerikaanse
,congres .Ditkomt neer opeenbijdrage vanUS$4,5 .miljoen voor de
jaren 1981-1983 inhetraam vanhetlopende meerjarenprogramma van
hetGCOofwel US$10,5 miljoen over delooptijd van 7jaar .
Degeraamde kosten vanhetproject voor deGemeenschap (prijzen van
mei .1981 )indeperiode vanhetlopende meerjarenprogramma vanhet
-GCObedragen 54,03 miljoen Ecu .of107,53 miljoen Ecuvoor de
7-jarenperiode 1980-1986 (6). •
6.Deregeling iseenconcreet uitvloeisel vande"kader-regeling tussen
deUnited States Regulatory Commission endeEuropese Gemeenschap voor
Atoomenergie ophetgebied vanhetonderzoek metbetrekking totde
nucleaire veiligheid "dieop19maart 1979 werd gesloten (7).Deze regeling
voorziet onder meer -enbehoudens desluiting vanafzonderlijke
overeenkomsten .tussen partijen -indeuitvoering vangemeenschappelijke
programma 'senonderzoekprojecten insamenwerkingsverband alsmede in
deuitwisseling vaninformatie inbepaalde sectoren vanhetnucleaire
veiligheidsonderzoek van deUSNRC ofvanEURATOM via hetGCO ,metname
studies vanbreuk inhetprimair koelsysteem envanongevallen met
koelmiddelverlies ,analyses door hetUSNRC ensimulering vanL0CA in
dereactor door het GCO . ,' -
7.Detenuitvoerlegging vandeze regeling brengt geen extra uitgaven ten
laste.-van deGCO-begroting mee . '
(5)C0M(80)750 def .van27november 1980 ,
(6)Document vandeRaad 7107 /81(AT046)vari 19mei 1^81 ,blz ,2--3
(7)Docum'ent vandeRaad

-3-
8.Dejuridische grouds lagvoor deregeling isartikel 101 (3)van
hetEURATOM-verdrag waarin wordt bepaald datdeCommissie zelf bevoegd
isvoor het onderhandelen over enhet sluiten van overeenkomsten welke
zonder tussenkomst vandeRaad enbinnen degrenzen van debetreffende
begroting kunnen worden uitgevoerd .
9.DeCommissie stelt deRaad hierbij inkennis vanhaar voornemen een
regeling metdeUSNRC tetreffen overeenkomstig deinartikel 101 (3)
vanhetEURATOM-Verdrag beoogde procedure .Deontwerp-overeenkomst
endebijlagen zijn aandeze mededeling gehecht .

Confai)
DRAFT
ARRANGEMENT BETWEEN
THE UNITED STATES NUCLEAR REGULATORY COMMISSION
(HEREAFTER CALLED USNRC )
AND
THE EUROPEAN ATOMIC ENERGY COMMUNITY "
{HEREAFTER CALLED EURATOM ) • - N
REPRESENTED BYTHE COMMISSION OFTHE .EUROPEAN COMMUNITIES
ON ■ ...
* ''.'■. '''
IN-PILE LWR LOCA SIMULATION .- .
The USNRC and EURATOM consider itwill bemutually beneficial to
cooperate inthe field ofreactor safety research . !
AstheUSNRC and EURATOM have agreed intheir bilateral general
arrangement oncooperation inthe field ofnuclear safety research
(hereafter called bilateral arrangement ),signed in1979 ,Art .II.5
ofthis bilateral arrangement foresees the possibility' ofcooperative
research projects based onthe facilities owned oroperated byone of
theparties ; ' ■
Asthemultiannual programme 1980-1983 oftheJoint Research Centre of
theCommission oftheEuropean Communities contains anactivity On
reactor safety towhich this cooperation will directly contribute ;
AstheESSOR reactor ,owned and operated bythe .Joint Research Centre ,
together with its Super-SARA circuit,' have particular characteristics
ofinterest for the LWR safety research ;
Asthis safety research has complementary characteristics tothe
research work undertaken bythe USNRC facilities ;
The following technical cooperation will beundertaken .

2.
Tno contracting parties -agreed asfollows :
ART .1-OBJECT
This arrangement covers the safety research area concerned with I.WR
fuel behaviour under loss -of-coolant accident conditions .
The USi-JRC participates toaCommunity research programme concerning
the experiments inthe Super-SARA circuit ofthe ESSOR reactor .This
participation concerns thepreparation "oftheprogramme ,its execution
and theevaluation ofits results .The cooperation has aduration of
7years ,starting January 1,1981 ,subject tothe provisions ofART .VI
of -thebilateral arrangement ,which reads :"Itisunderstood that the
ability oftheParties tocarry out their obligations issubject tothe
availability ofappropriated funds ."
ART .2-FORM OFCOOPERATION
The cooperation will beexecuted asforeseen inART .IIofthebilateral
arrangement and inparticular inthe following form :
1.The exchange oftechnical information inthe form ofreports ,
experimental data ,computer codes ,correspondence ,newsletters
and oral discussions .
2.The organization ofrelevant meetings .
3.Short visits byspecialist teams orindividuals tothefacilities
ofthe other Party .
4.Possible temporary assignment ofpersonnel ofoneParty tothe
laboratory orfacilities oftheother Party ,each such assignment
tobeconsidered onacase -by-cane basis andbethesubject ofa
separate attachment ofstaff agreement between theParties .
5.Thesupply ofequipment relevant totheexecution oftheresearch
project .
./■

ART .3-LIMITS OFCOOPERATION
The cooperation will extend totheSuper-SARA programme asdefined
inAnnex Iofthis arrangement .
1.The USNRC will make available toEURATOM information inthe relevant
field ofresearch pertinent tothetimely ,successful performance of
tests inthecurrently proposed Super-SARA test programme ,which ithas
theright todisclose either initspossession oravailable toit,in
particular therelevant information related tothe USPBFexperiment .-
2.EURATOM will make available tothe USNRC the information relevant to
the execution ofthe Super-SARA project .
3.Each Party will promptly .transmit andcall totheother ,Party 's
attention anyinformation onitsresearch results appearing tohave
significant safety implications . " ,
ART .4-EXECUTION OFCOOPERATION ; \
The general provisions' ofART .IVofthebilateral arrangement apply ..
"Each Party will designate asAdministrator asenior representative
"tocoordinate itsparticipation intheoverall exchange .Areview ,
"meeting oftheAdministrators ortheir representatives will be
"held atagreedrupon intervals toreview the status ofexchange
"andcooperation established under this Arrangement ,torecommend
"revisions forimproving and developing thecooperation ,and to
"discuss topics within the scope ofthe cooperation .The time ,place
"and agenda forsuch meetings shall beagreed upon inadvance ."
Specific provisions concerning the implementation ofthe scientific -
technical content ofthe present cooperation are given inAnnex II.
ART .5-USE OFINFORMATION AND PATENTS
The provisions ofART .Vand VII ofthe bilateral arrangement apply .

KXCHANGE AMD USE OFINFORMATION
1.The Parties support thewidest possible dissemination ofinformation
-provided orexchanged under this Arrangement ,subject totheneed
toprotect proprietary information asmay beexchanged hereunder ,and
tothe provisions ofART .VII ,PATENTS .
2.Asused inthis Arrangement ,thefollowing -definitions .apply :
(i)The term "information "means scientific ortechnical data ,
results ormethods ofresearch and development ,and anyother
information intended tobeprovided orexhanged under this
Arrangement .
(ii).The term "proprietary information "means information which
contains trade secrets orother privileged orconfidential . ,
commercial information ,andmay only include information which :
(a)hasbeen held inconfidence byitsowner ;and
(b)isofatype which iscustomarily held inconfidence byits
owner ;and " -
(c)has notbeen transmitted bythe transmitting Party toother
entities (including the receiving Party )except onthebasis
that itbeheld inconfidence ;and
(d)isnot otherwise available tothe receiving Party from
another source without restriction onits further
dissemination .
/
3.The Party receiving proprietary information pursuant tothis
Arrangement shall respect the privileged nature thereof ,provided
such proprietary information isclearly marked with the appropriate
legend ofthe transmitting Party andwith the following (orsubstantially
similar )restrictive legend :
"This document contains proprietary information furnished in .
confidence under anArrangement date botween the
United States Nuclear Regulatory Commission andEURATOM and shall
not bedisseminated outside these organizations ,their consultants ,
contractors and licensees ,andconcerned departments and agencies of
the Governments ofthe United States and ofthe member states of
EURATOM without theprior approval of / ' .
This notice shall bemarked onany reproduction hereof ,inwhole orin
part .These limitations shall automatically terminate when this
information isdisclosed bytheowner without restriction .

Inregard tothedissemination and use ofproprietary information
received inconfidence under this Arrangement ,theParties agree that
(i)Such information may bedisseminated bythereceiving Party to.
persons ,v.'ithin oremployed bythe receiving party ,and to :
(a)concerned government departments and government agencies
intho country ormember .states ofthe receiving Party ;
(b)prime orsub-contractors orconsultants ofthe receiving
Party located within the geographical limits ofthe receiving
;Party 'scountry ormember states ,for use only within the
framework oftheir contracts with the receiving Party in
work relating tothe -subject matter oftheproprietary
•"information ; ' '
(c)organizations permitted orlicensed bythe receiving Patty in "
the field ofdevelopment ,design ,construction andpperation
ofnuclear prbduction orutilization facilities for use only
within the'terms ofsuch permit orlicense ;
'(d)contractors oforganizations identified -inItem 4(i)(c)
above for use only within the scope ofthe permit orlicense .
granted tosuch organizations ;
provided that any proprietary information sodisseminated under
sub-paragraphs (b) (c)and .(d),above shall bepursuant toan .agreeme
ofconfidentiality and shall bemarked with arestrictive legend
substantially identical tothat appearing' inparagraph 3above .
(ii)With theprior written consent oftheParty providing proprietary
information under this Arrangement ,the receiving Party may
disseminate such proprietary information more widely than
- •otherwise permitted inthe foregoing subsection (i).The JParties
shall cooperate with each ,other indeveloping procedures for'
requesting andobtaining approval for ,such wider dissemination
andeach Party will gtant such approval totheextent permitted
byits national policies ,regulations and laws .
(iii )Each Party shall' exercise itsbest efforts toensure that •
■proprietary information received by.it under this Arrangement is
controlled asprovided herein .Ifone oftheParties becomes
aware that itwill bo ,ornay reasonably beexpected tobeco ie,
.unable tomeet thenon-dissemination provisions ofthis Article ,
itshall immediately inforn-the other Party .The Parties shall -.

6.
thereafter consult todefine anappropriate course ofaction .
(iv)Non-documentary proprietary information provided inseminars
andother meetings organized under this Arrangement ,or
information arising from theattachments ofstaff ,use of
facilities orjoint projects shall betreated bytheParties
inaccordance with theprinciples specified inthis Article ,
provided ,however ,that theParty communicating such proprietary
information places ,the recipient onnotice astothe character
ofthe information communicated .
(v)Nothing contained inthis Arrangement shall preclude the use
ordissemination ofinformation received byaParty from the
sources outside this Arrangement .
(vi)Information given byone Party totheother under this Arrangement
shall beaccurate tothebest knowledge andbelief oftheParty
giving it,but neither Party gives any warranty astothe accuracy
ofsuch information orshall have any responsibility for the
consequences ofany use towhich such information may beput bythe
other -Party orbyany third party ."
"PATENTS
1.Asset forth inthis Article ,"Country shall betaken tomean ;
(i)The United States ofAmerica for the USNRC Party ;
(ii)The Member States ofEURATOM for the EURATOM Party .
2.With respect toany invention ordiscovery made orconceived inthe
course oforunder this Arrangement ;
(i)Ifmade orconceived bypersonnel ofone Party (theAssigning
Party )oritscontractors while assigned totheother Party
(Recipient Party )oritscontractors ; t
\ (a)The Recipient Party shall acquire all right ,title ,and
interest inand toany such invention ordiscovery inits
ownCountry and inthird countries ,subject toanon-exclusive ,
irrevocable /royalty-free license inall such countries tothe
Assigning Party ,with' the right togrant sub-licenses ,under any
such invention ordiscovery and anypatent application ,patent ot
other orotection relating thereto ,foruse intheproduction or
. ./.

7.
utilization ofspecial nuclear material oratomic energy ;and
(b)TheAssigning Party shall acquire all right ,title ,and
interest inand toany such invention ordiscovery inits ov/n
Country ,subject toanon-exclusive ,irrevocable ,royalty-free
license totherecipient party ,with the right togrant sub-
licenses under any such invention ordiscovery and anypatent
application ^patent orother protection relating thereto for "
use inthe production orutilization ofspecial nuclear material
oratomic enery .
(ii)Ifmade orconceived bypersonnel other than thepersonnel referred
toinparagraph (i)above ,asaresult ofattendance atmeetings
orasaresult ofemploying information v/hich had been communicated -
under this Arrangement byone Party orits contractors tothe other
Party oritscontractors ,the Party ofsuch personnel making the
-invention shall acquire all right ,title ,and interest inand to
any such invention ordiscovery inall countries ,subject tothe
grant 'tothe other Party ofaroyalty-free non-exclusive ,irrevocable
,license ,with the right togrant sub-licenses inand toany such
-invention ordiscovery and any patent application ,patent orother
protection relating thereto inallcountries ,foruse inthe
production orutilization ofspecial nuclear material oratomic
energy . ^ ■
(iii )With regard toother specific forms ofco-operation ,including
loans -orexchanges ofmaterials ,instruments and equipment for
special joint research projects ,the Parties shall provide for
appropriate distribution ofrights toinventions ordiscoveries
resulting f-rom such co-operation .Ingeneral ,however /each Party
should normally own the rights tosuch inventions ordiscoveries'
inits own Country with aroyalty-free ,non-exclusive ,irrevocable
license tothe other Party ,and the rights tosuch inventions or
discoveries inother' countrios should beagreed bythe Parties on
anequitable basis . _
3.Neither Party shall discriminate against citizens oftheCountry of
theother Party with respect "togranting any license orsub-license
under any invention ,ordiscoverv pursuant toparagraph 1above .

Itisunderstood that thelicensing policies andpractices ofeach
Party maybeaffected because oftherights ofboth Parties togrant
licenses within asingle jurisdiction .Accordingly ,either Party may
request ,inregard toasingle invention ordiscovery orclass of
inventions ordiscoveries ,that the Parties consult inaneffort to
lessen oreliminate anydetrimental effect that theparallel licensing
authorities may have onthe policies and practices ofthe Parties .
4.Neither Party will assume the responsibility topay awards or
compensation required tobepaid tothenationals oftheother Party
according tothe laws ofthe other Country ."
ART .6-COSTS
The USNRC will participate in-kind inthe costs for the programme atan
annual level roughly equivalent to1,500,000 US1981 dollars ormore ,
subject tocontinued annual UScongressional funding ofprogramme support
andmaintenance ofSSTprogramme content andprogress .This participation
will beinthe form ofsupply oftest hardware ,manpower and services as
defined inAnnex III .
ART .7-FINAL PROVISIONS
1.This Arrangement shall enter into force from thedate ofconclusion
thereof , and ,subject toparagraph 2ofthis Article ,shall
remain into force for aperiod of7years ,unless previously extended
byagreement between the Parties ..
2.Either Party maywithdraw from thepresent Arrangement after providing
theother Party written notice 1year prior toitsintended date of
withdrawal .
3.TheParties agree that alldiscussions ,meetings ,exchange ofdocuments
orother acts ofcooperation between them andprior totheentry into
force ofthis Arrangement which ,ifthey hadoccurred subsequent tothe
entry into force ofthis Arrangement ,would have been subject tothis
Arrangement ,shall besubject totheterms hereof .

9.
FORTHEUNITEDSTATES FOREURATOM
NUCLEAR REGULATORY COMMISSION COMMISSION OFTUBEUROPEAN COMMUNITIES
BY: 'BY: '-
TITLE-,!." 'TITLE:
DATE DATrii

ANNEX 1
0y^L|N |=QF_^H |=|UP|RSARA =|E|T=P10GRAM iSSTP )
1.General
During 1980 ,aTask Force wasestablished
bytheJoint Research Centre oftheCommission ofthe
*European Communities todiscuss andreach aconsensus among the
participants onthe objectives ,test matrix and technological difficulties
ofthe SSTP .This consensus was reached inOctober 1980
and theprogram which emerged ,designated asthe "consensus
SSTP ",remains thefoundation ofall on-going work .
The first basic objective oftheconsensus SSTP isthe
attainment ofdata and adeeper generic understanding con- '
cermng those aspects ofLWRfuel cluster behaviour which
can lead to .sngnif leant fuel damage ,core blockage and
coolability problems asaresult ofhypothetical accident
situations ofalowprobability where normal safeguard sy­
stems are assumed tcbepartially orwholly in-operative .
Inaddition tosuch anunderstanding ofthe thermo -
mechar.ical and thermchydraulics processes governing LWR
fuel cluster damage andblockage ,a-second b^sic objective
isthe correlation ofthe transient fission product release
(FPR )occur :ngdurzng accident situations with thetype and
extent ofthe fuel damage provoked .
The consensus SSTP covers fuel cluster behaviour both
for thetransient conditions ofthe "large break "loss-of -

coolant-accident (LB-LOCA )and thetransient conditions of
other accident scenarios which under certain circumstances
could lead toperiods ofpartial core uncovery ar.dhigher
clad temperatures and apotential forsevere fuel damage
(SFD).Animportant example ofsuch atransient leading to
SFD isprovided bytheThree Mile Island (TMl )accident .
Itisunderstood that more emphasis should beplaced "
onthe SFDpart oftheprogram than ontheLB-LOCA part .
Thereason for this isessentially that ,while aconsiderable
amount ofwork hasbeen started orcompleted for theLB-LOCA ,
activities inthe SFDfield arerelatively behind andrequire
■intensification .
LB-LOCA test program
The LB-LOCA part oftheconsensus SSTP has been establi­
shed onthebasis that ismust beconfirmatory with respect
tothecurrent out-of-pile L3-L0CA fuel behaviour programs
such asEEBEKAattheKfKKarlsruhe (which areable to
scope well the governing parameters and require only li­
mited m-pile checks toconfirm the typicality ofrod-
simulators performar.ee )ar.dcomplementary with respect to
thecurrent m-pile LB-LOCA programs .such asPBFatINEL-
Idaho andPHEBUS atCadarache ,France (where .thedata
available orexpected should bebacked upbyin-pile tests
which give something new).
The SUPEH3AP.A loop isbeing fabricated with thedesign
aim tosimulate the entire LB-LOCA scenario ,blowdown to
reflood ,bymeans .cfcontrol actions onvalves and cluster
power .This capability will beexploited inorder tomeet
thebasic objectives stated above ,which ,for theLB-LOCA

takeonthefollowingparticular form:
-Claddeformation characteristics ,likelytobe
dominatedbyhighstrain-rate ballooning ,influencing
thedegreeofclusterblockage.
-Interactions causedbydeformations whichmight
influencetheclusterblockagefraction.
-Rodclustercoolability andthermalresponseduring
refloodmg.
-Dependence -.ofFPRontheextentofclusterdamage.
Theconsensus LB-LOCAtestmatrixwhich
fitswithintherequiredconfirmatory/complementary contextis
coveredbythefollowingtests:
-4Testswith2mlongPWR(type17x17)clustersof32
rods;
-1testwitha2mlongBWR-typecluster(probablytype
€x8E);
-2unspecified teststocoverunforeseenrequirements
ofhiahpriority -arisingatalaterstage.
Coreuncovervar.dSF3testprogram
IncontrasttotheL3-L0CApart,theSFDpartofthe
consensus SST?seekstogenerateamorecomprehensive range
ofdata.Thereisnotcurrentlythewidevarietyofactivity
forSFDasfortheLB-LOCAfield:theonlyotherknown
comparable SFDprogramisthatplannedforthePBFatINEL
-Idaho,startingin1982.ThePHEBU3programmayalso
proposeSFDtests,inwhichcasethesewillalsohavetobe
cons:dered.For*cnexmebeing,theSSTPhastoensuxca
/
»'„•/••

_4-
goodcomplementary/confirmatory relationship onlywiththe
PBFprogram.'.._■ •
Considering thebasicobjectivesstatedaboveandthe
largearrayofaccidentscenar3oswhichmaypotentially lead
toSFD,asoccurredinthecaseoftheTMIaccident,the'
SUPERSARAloophasthedesignaimtosimulatetheessential
commonfeature'ofalltheSFDscenarios :clusterboildown
anduncoverytoprovokerelevanttransientofclad
temperature incombination withrelevanttransientsof'
systempressure,followedbyre-submergence andquenching..
Thiscapabilitywillbeusedtoaddressthefollowing
particular SFDobjectives.
A)DegreeofclusterblockageandFPRduetocladdefor­
mationandruptureatthelowstrain-rates possiblein
"coreuncovery"transients ,especiallyconsidering the
effectsofcladoxidation onsuchdeformation inthe
high°<-highgrange(<v1.100-1650K). ■.
B)DegreeofclusterblockageandFPRresultingfromthe
format:onofarubblebed-duetothewidespread oxida­
tionoftherods(upto1900K),withorwithout -prior
ballooning andrupture,followedbyrodfragmentation
eitherby'quenching (re-submergence )orsystemdepres-
surisation. ,
C)DegreeofclusterblockageandFPRresultingfromthe
formationofaZr/U02liquidsolutionabove~2070K
(rod"candii:.g")inthepresenceofwidespreadrod
oxidat-on,wit.-,orwithoutsubsequentrubblebed"
provocation byquenching.
Theconsensus 'SFDtestmatrixwhich
fitswithintherequiredcomp1ementary/confirmatxonrelation
withPBF,willbsattainedbymeansofthefollowingtests:.
•••/•#•

-5-
-3testsV7ithobjective (A),allwith2mlor.gPV7Rtype
clustersof32rods;
4testswithobjective (B),3with2mloi.gPWRtype
clustersof32rods,1witha2mlo:igBWRtypecluster;
-5testswithobjective (c),4with2mlo..gPWRtype
clustersof32rods,1witha2mlo.'-gBWRtypecluster;
-2unspecifiedteststopermittheinclusionofunfore­
seenobjectiveswhichmaylaterbecomeofh:ghpriority.
'JCVWIWWWUnT iAffwrii^raiwri'Mfcft^rrrr -–•

TABLE1:SSTPLARGEBREAKLOCATESTMATRIX'
i
TESTN°INTENTIONSCLUSTER
TYPECLADDEFORMATION
CONDITIONSFUEL ! COMMENTS
LB-1INVESTIGATE CLAD
DEFORMATION INfiPHASEIN
"HEATBEFORELOAD"
CONDITIONS ·PWR(*)i
HEAT-BEFORE-LOAD;
DEFORMATION ,
AT~1300KFRESH
PRECONDITIONED
COMPLEMENTARY TO
.PHEBUS,PBF,NRU.
I
LB-2HIGHPOTENTIAL FORCLAD
DEFORMATION (HIGH^);
"HEATBEFORELOAD"
CONDITIONSPWR(*)
s^HEAT-BEFORE-LOAD;
DEFORMATION
AT1070KFRESH
PRECONDITIONED
x»
LB-3ASTESTLB-2BUT
DEFORMATION IN"LOAD
BEFOREHEAT"CONDITIONSPWR(*)LOAD-BEFORE-HEAT;
DEFORMATION
AT^1070ΚFRESH
PRECONDITIONEDCONFIRMS
REBEKA,MRBTF
COMPLEMENTARY TO
NRULB-4ASTESTLB–3BUT
INVESTIGATE EFFECTOFFUEL
BURN-UPI.E.FUELCRACKING ,
RELOCATION ETC..PWR(*)LOAD-BEFORE-'ΈΑΤ;
DEFORMATION
AT^1070KSOME
IRRADIATED
RODS
LB-5ASTESTLB-3BUT
CONFIRMEXTRAPOLATION OF
PWRTESTRESULTSTOOTHER
FUELGEOMETRIES ,BRW(**)LOAD-BEFORE-HEAT;
DEFORMATION
AT-J1070KFRESH
PRECONDITIONEDCOMPLEMENTARYTO
PHEBUS,PBF,NUR,
REBEKA,MRBTF .
LB-6
LB-7HIGH-PRIORITY^PERMITTESTINGOFREMEDIALMEASURESORANYOTHERSTUDYLATERENTIRING
(*)17X17TYPEGEOMETRY
(**)PROBABLY8x8TYPEGEOMETRY

TABLE2:SSTPCOREUNCOVERY/SEVEREFUELDAMAGETESTMATRIX
TESTSERIESA:INVESTIGATION OFEXTENTOFCLUSTERBLOCKAGE ANDFISSIONPRODUCTRELEASE
DUETOCLADDEFORMATION UNDER"SMALLANDMEDIUMBREAK"CONDITIONS
COMPLEMENTARY TOPBF.
TESTΝ°CLUSTER
TYPE INTENTION TESTTERMINATION/FINALCONDITIONS
SFD-A-1PV/R(*)CLUSTERUNCOVERY TOTCLADrv1080-
1200K,THENCLADLOADINGAND
BALLOONING BYSLOWPRESSURE RAMP
ΔΡCLAD~0.005MPa/SCLUSTERRE-SUBMERGED AFTERWIDESPREAD
CLADRUPTURE
SFD-A-2PVR(*)ASSFD-A-1BUTV/ITHTCLAD 1350KAND
ΔΡCLADAD.TESTEDIN"RANGE0.005-0.05
MPa/STOGETDESIREDOXIDATION DURING
BALLOONINGCLUSTER RE-SUBMERGED AFTERWIDESPREAD
CI.ADRUPTURE
SFD-A-3PV/R(*)ASSFD-A-2BUTWITHTCLAD^1650KCT,USTERRE-SUBMERGED AFTERWIDESPREAD
CLADRUPTURE
*17X17TYPEGEOMETRY

TABLE2(CONT.):SSTPCOREUNCOVERY/SEVEREFUELDAMAGETESTMATRIX
TESTSERIESB:INVESTIGATION OFEXTENTOFCLUSTERBLOCKAGEANDFISSIONRPODUCTRET,EASE
WITHNOMOLTENCOMPONENT DUETORODFRAGMENTATION ANDRUBBLEBEDFORMATION ;
COMPLEMENTARYTOPBF
•(
TESTΝ0'CLUSTER
TYPE .INTENTION TESTTERMINATION/FINALCONDITIONS
SFD-B-1PWR(*)CLUSTERUNCOVERY TOTCLAD^1900KAT
ARATE-ν0.3K/sTOFROVOKECLAD
RUPTUREAT^11OOKFOLLOWEDWIDESPREAD
CLADOXIDATION ANDEMBRITTLE MENT.
PSYS/\λ8MPa .~ ,SLOWCOOL-DOWN TOAVOIDROD-.■'
FRAGMENTATION ANDRUBBLEBED
'- Λ
SFD-B-2
ΛPWR(*)
ÍASSFD-B-1.FASTCOOL-DOWN TOPROVOKEROD
FRAGMENTATION ANDRUBBLEBEDFORMATION
SFD-B-3\
PWR(*)ASSFD-B-1BUTWITHCLADRUPTURE
OCCURINGAT^1650K-.I
ASSFD-B-2
SFD-B-3BWR(**)CLUSTERUNCOVERY TOTCLAD~150OKWITH
NORUPTURE(ÄPCLAD<0);WIDESPREAD
CLADOXIDATION AT**130OK;SLOWCOOL-
DOWNTOTCLADos600K.PSYS-v/4MPaPSYSDROPPEDFROM4TOtMPaTO.PROVOKE
CLADSHATTERING FORTCLAD~600K.SL0W
COOL-DOWN CONTINUED TOAVOIDFURTHER
RODFRAGMENTATION
*17x17TYPEGEOMETRY
**PROBABLY8x8TYPEGEOMETRY

..TABLE 2(CONT.)SSTF CORE UNCOVERY /SEVERE FUEL DAMAGE TEST MATRIX
TEST SERIES C: INVESTIGATION OFEXTENT OFCLUSTER BLOCKAGE DUE TOFORMATION OFA
MOLTEN SOLUTION OFU02 INZIRCALLOY (ROD"CANDLING "),POSSIBLY
FOLLOWED BYQUENCH ■INDUCED RUBBLE BED ;PWR TESTS CONFIRMATORY TO
PBF ,BWR TEST COMPLEMENTARY'
TEST N°CLUSTER
TYPEINTENTION
ΝTEST TERMINATION /FINAL CONDITIONS
SFD-C-1 PWR (*) CLUSTER UNCOVERY TOTCLAD~ 2300K AT
ARATE ^4K/sTO -PROVOKE CLAD RUPTURE
AT-1100 ΚFOLLOV /EDBYCLAD OXIDATION ,
MELTING AND DISSOLUTION OFU02
(CANDLING )TOFORM FROZEN SLAG AT
COOLER ELEVATIONS .PSYS ~8MPaSLOW COOL –DOWN TOAVOID RUBBLE BED DUE
TOFRAGMENTATION OFRODS AND SLAG
SFD-C-2 PWR (*) ASSFD-C-1 FAST COOL-DOWN TOPROVOKE RUBBLE BED
DUE TOROD' AND SLAG FRAGMENTATION
SFD-C-3 PWR (*) 1 .ASSFD-C-1BUT WITH CLAD RUPTURE
OCCURING AT~Ί650ΚASSFD-C-2
SFD-C-1 PWR (*)ASSFD-C-1BUT WITH FASTER UNCOVERY
TOSIGNIFICANTLY EXCEED 4K/s·TCLAD
RAMP TOINVESTIGATE MORE EXTENSIVE
CLAD MELTINGASSFD-C-2
SFD-C-5 BWR (**)ASSFD-C-1BUT WITH ¿VPCLAD<0TOGET
CLAD CREEP-DOWN INSTEAD -OFRUPTURE ï-'
POTENTIAL FOR MORECLAD 'MELTING AND
ASSESSMENT OFSWR SUBASSEMBLY MELT -
THROUGHASSFD-C-1
* 17X17TYPE GEOMETRY
** PROBABLY 8X8RTYPE GEOMETRY

TABLE2(CONT.):SSTPCOREUNCOVERYSEVEREFUELDAMAGETESTMATRIX
TESTSERIESD:UNSPECIFIED TESTS
TESTN°SFD–D–1:)2UNSPECIFIED TESTSTO^RMITSTUDIESLATERENTERINGHIGHPRIORITY,
TESTN°SFD–D–2:)CURRENTLY UNFORSEEN

-H
ΑΝΝ":· :τι
Dilaterai Tochnical JinolGmcntation Corr.mictee
The contractiong Parties hereby set upaBilateral Technical
Implementation Committee toassure the execution ofthe
co-operation provided for inthis Arrangement .
Each Party will designate its members tothis Bilateral
Committee and may further designate atechnical spokesman .
The Committee shall meet atleast annually toreview SST programme
progress and the effectiveness ofthe cooperative programme effort .
The output from these meetings will beused bytheNRC asapart
ofits annual internal review ofthe SST programme progress and
its continued applicability tocurrent NRC programme objectives .

Ai
ANNEX III
tf
\ '
The basic USNRC in-kind contribution shall beatanannual level roughly
equivalent to1,500,000 US1981 dollars ormore ,(subject tocontinued
annual UScongressional funding ofprogramme support and maintenance of
SSTprogramme content andprogress )asdefined inART .6oftheArrangement .
The form oftheUScontribution ,listed inorder ofpriority ,shall be :
1.NRCbasic supply of3test trains including allprecalculations ,R&D ,
operational data ,safety analyses ,QA.-QC results ,inaddition to ,the
test train hardware and components for tests and schedules equivalent
toorbetter than SFDA-1 ,SFDB-1 and SFDC-1 ofthe currently planned
SST programme ,subject toUScash flow limitations .
2.Long term assignments providing liaison with PNL toassist Ispra in :
2.1 .harmonizing with USprecalculations and test operational specifications ;
2.2 .harmonizing with USdesign and analysis ofSFD-TT 's;
2.3 .assembly ofSFD-TT 'satIspra ;
2.4 .SFD test feasibility and safety assessment ;
2.5 .co-ordination ofPBF test experiment and results (e.g. shroud
performance )into Super-SARA planning .
3.Short term assignments providing :
3.1 .assistance with loop commissioning activities ;
3.2 .specification anddevelopment ofspecial software for data
acquisition system and programme monitoring system ;
3.3 .assistance incalibration and application ofthe transient thermo­
hydraulic instrumentation ;. •
3.4 .assistance indesign ,testing .andapplication ofthetransient rodsystem
3.5 .assistance inthe fission product release (FPR )field ,with aview to
attaining optimal specifications for the Super-SARA FPR monitoring
system inthe light ofUSexperience with similar equipment .
4.Supporting services mthe US :
4.1 .special analyses ,defined and requested byIspra and agreed toby
NRCr tosupport ;
4.2 .back-up for item 2,.above ;
4.2.1 .safety assessment ;^ • -
4.2.2 .test precalculations performed byIspra .

2.
5.Supply ofspecial components forremaining test trains :
5.1 .advanced instrumentation ,e.g .:
5.1.1 .fused alloy high temperature sensors ;
5.1.2 .mixture level sensors ;
5.1.3 .11shrouds . '
The annual NRC level ofSSTP support effort for the several listed
activities ,isestimated asfollows :
item 2 :one man per year for 5years ;
item 3:eight man months per year for 3years ;
item 4 :seven man years .
The USNRC notes that atthe minimum level ofin-kind contribution of
dir .1.5m /year there ishigh risk that delivery ofthe three test trains
may not betimely .NRC budget projections donot allow for initial annual
in-kind contributions ofmore than dir .1.5m thus ,the priority schedule
may need periodic examination and revision toreflect these limitations .
The NRC notes further that total funding will probably not cover more
than asmall part ofthe item 5priorities ,e.g. the 11shrouds initem
5.1.3 .probably cannot beprovided ,either inatimely fashion or
within the available annual NRC funding levels .