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

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KOMMISSION DEREUROPÄISCHEN GEMEINSCHAFTEN
KOM(81)551 endg.
Brüssel-den1.Oktober1981
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VEREINBARUNG ZWISCHEN DERUNITEDSTATESNUCLEAR REGULATORY COMMISSION
(USNRC)UNDDERKOMMISSION DEREUROPAISCHEN GEMEINSCHAFTEN NAMENSDER
EUROPAISCHEN ATOMGEMEINSCHAFT (EURATOM)OBERREAKTORINTERNE SIMULIERUNG
EINESKÜHLMITTELVERLUSTUNFALLS (LOCA)INLEICHTWASSERREAKTOREN (LWR)
(Mitteilung derKommission andenRat)
K0M(81)551endg.

GFS/408/81
Mitteilung anden Rat
Betrifft :Vereinbarung zwischen der United States Nuclear Regulatory
Commission (USNRC )und der Kommission der Europäischen Gemein­
schaften namens der Europäischen Atomgemeinschaft (EURATOM )
über reaktorinterne Simulierung eines Kühlmittelverlustun -
falls (LOCA )inLeichtwasserreaktoren (LWR )
1.Das vom Rat am13.März 1980 (1)verabschiedete laufende Mehrjahres -
Forschungsprogramm der Gemeinsamen Forschungsstelle (GFS )1980-1983
umfaßt das Projekt Super-SARA ,-das imReaktor ESSOR der Anstalt
Ispra als wichtigster Beitrag der Anstalt zuden Forschungsarbeiten
über die Sicherheit von LWR durchgeführt werden soll .Eines der
Hauptziele dieses Projektes ist es,durch Simulierung imReaktor
(reaktorintern )das Verhalten von Reaktorbrennstoff imFalle eines
-Kühlmittel Verlustes zuuntersuchen .
Diesem Bereich der LWR-Sicherheitsforschung kommt weltweit vorrangi­
geBedeutung zu ,insbesondere nach dem Störfall von Three Mile Is­
land (TMI )ind6nVereinigten Staaten am28.März 1979 .
%
y
2.Während der Erörterungen ,die zum Beschluß über das gegenwartige
Mehr jahresprogramm der GFS geführt haben ,hat der Rat die Bedeutung
der internationalen Zusammenarbeit amProjekt Super-SARA betont .Zur
Zeit der Beschlußfassung wurde der Rat darüber unterrichtet ,daß die
.Kommission mit der USNRC Verhandlungen imHinblick auf eine der­
artige Zusammenarbeit aufgenommen hat und daß der Beitrag der USNRC
amProjekt -der inSachleistungen erfolgen würde -bei dengeschätz­
ten Kosten des Projektes für dieGemeinschaft bereits ,berücksichtigt
worden war (2).
3.DerRatwurde über denweiteren Verlauf derVerhandlungen derKommis­
sion mit der USNRC imJahre 1980 mit der Mitteilung der Kommission
anden Rat -über die Durchführung derersten Phase (1980 )desProjek­
tes -Super-SARA unterrichtet (3).Bei der Beschlußfassung über die
zweite Phase des Projektes (1981-1983 )bemerkte der Rat erneut ,daß
der Wert des inSachleistungen erbrachten voraussichtlichen Bei­
trages der USNRC bei den geschätzten Kosten des Vorhabens für die
Gemeinschaft berücksichtigt worden war (4).
(1)Amtsblatt Nr.272vom18.März 198Q ,S.11 .
(2)Ratsdokument 5422 /80 (ATO 31)vom4.März 1980 .S.3
(3)K0M(80 )750endg .vom27.November 1980 ,S.40
(4)Ratsdokument 7107 /81 (ATO46)vom19.Mai1981 ,S.3.

-2-
ι
4.Gleichzeitig wurden der Beratende Programmausschuß "Reaktorsicher -
heit "und der Allgemeine Beirat der GFS über den Verlauf der
Verhandlungen derKommission mit derUSNRC ausführlich unterrichtet .
f.
5.Diese Verhandlungen haben nun zur Erstellung des Entwurfs eines
Abkommens (inForm einer Vereinbarung )undvonAnhängen geführt ,die
für beide Seiten annehmbar sind .Neben einer Regelung des Zugangs zu
Informationen und Patenten (Artikel 5),sind weitere Hauptmerkmale
des Vertrages :
_.-Die USNRC stellt Euratom die einschlägigen Informationen über das
Experiment USPBF zurVerfügung (Artikel 3).Dievon derKommission
imJuni 1980 eingesetzte Task Force Super-SARA ,die die Kommission
bei der Erstellung der Programmziele von Super-SARA unterstützen
und die Verbindung dieses Projektes mit anderen einschlägigen
Experimenten gewährleisten soll ,zeigte indiesem Zusammenhang die
Bedeutung des Experimentes PBF auf sowie die Notwendigkeit ,die
komplementäre /unterstützende Verbindung zwischen diesen beiden Pro­
jekten zugewährleisten ,und zwar insbesondere durch die Zusammen­
legung vonInformationen (5);
,-die USNRC legt den Sachleistungsbeitrag ,den sie zum Projekt
erbringen soll (Anhang 3),auf einen 1jährlichen Betrag fest ,der
einem Minimum von schätzungsweise 1,5 Millionen USDollar (1981 )
entspricht ,vorbehaltich fortlaufender jährlicher Mittelbereitstel -
lungen für dieses Projekt durch den amerikanischen Kongreß .Dies
würde für die Jahre 1981-1983 imRahmen des laufenden Mehrjahres -
programms der GFS einen Beitrag ^on4,5 Millionen USDollar
,bedeuten oder 10,5 Millionen USDollar während der siebenjährigen
Laufzeit der Vereinbarung .Die geschätzten Kosten des Projektes
für die Gemeinschaft (zuPreisen vom Mai 1981 )für den Zeitraum
des gegenwärtigen Mehr jähresprogramms der GFS betragen 54,03 Mil­
lionen ECU oder 107,53 Millionen ECU für den Siebenjahreszeitraum
1980-1986 (6).
-die Vereinbarung sieht vor ,daß die USNRC bei der Durchführung
dieser Zusammenarbeit konsultiert wird .
6.Diese Vereinbarung konsolidiert den Rahmen der am19.März 1979
geschlossenen Vereinbarung zwischen der United States Regulatory
Commission und der Europäischen Atomgemeinschaft auf dem Gebiet der
Sicherheitsforschung imNuklearbereich (7).Diese Vereinbarung sieht
unter anderem und vorbehaltlich des Abschlusses separater Verein­
barungen zwischen den Parteien die Durchführung gemeinsamer .Pro­
gramme undkooperativer Forschungsvorhaben sowie den Informationsaus­
tausch ingenau festgelegten 'Bereichen dernuklearen Sicherheitsfor -
schung vor ,die von der USNRC oder von Euratom auf dem Wege über die
.GFS durchgeführt wird -indiesem falle durch Studien amPrimärkühl -
system und Untersuchungen über Küfrlmittelverlustunfälle und Analysen
durch die USNRC und reaktorinterrie Simulierung von LOCA durch die
GFS .
7.Durch die Ausführung dieser Vereinbarung enstehen für den Haushalt
der GFS keine zusätzlichen Kosten ,
(5)K0M(80 )750éndg .vom27.November .1980
(6)Ratsdokument 7107 /81 (ATO46)vom19.Mai 1981 ,S.2-3
(7)Ratsdokument

-3-
8.Die Rechtsgrundlage für die Vereinbarung ist Artikel 101 Absatz 3
Euratom-Vertrag ,indem spezifiziert wird ,daß Abkommen ,deren Durch­
führung keine Mitwirkung des Rates .erfordert und imRahmen des
betreffenden Haushaltsplans möglich ,ist ,von der Kommission allein
ausgehandelt und abgeschlossen werden können .
, »
9.Die Kommission unterrichtet den Rat daher über ihre Absicht zum
Abschluß einer Vereinbarung mit der USNRC gemäß dem inArtikel 101
Absatz 3Euratom-Vertrag vorgesehenen Verfahren .Der Entwurf der .
Vereinbarung mit Anhängen liegt dieser Mitteilung bei . .

Cûfi(fi )5T-4 .
DRAFT
ARRANGEMENT BETWEEN -
THE UNITED STATES NUCLEAR REGULATORY COMMISSION
(HEREAFTER CALLED USNRC ) '' •.* ,
AND ...
THE EUROPEAN ATOMIC' ENERGY COMMUNITY '
(HEREAFTER CALLED EURATOM )
REPRESENTED BYTHE COMMISSION OFTHE "EUROPEAN COMMUNITIES
ON -'' - .' ■
-' : -" '
IM-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 ofnucleat safety research
(hereafter called bilateral arrangement ),signed /in1979 ,Art .II.5
ofthis bilateral arrangement foresees thepossibility ofcooperative
research projects based on .the facilities owned oroperated byone of
the parties ;
Asthemultiannual programme' 1980-1983 oftheJoint Research Centre of
theCommission ofthe European Communities contains anactivity on
reactor safety towhich this cooperation will directly contribute ;
AstheESSOR reactor ,owned and operated bythe Joint Research Centre ,
together with itsSuper-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 -OHJECT
i
This arrangement covers the safety research area concerned with LWR
fuel behaviour under loss -of-coolant' accident -conditions .
The USMRC participates toaCommunity research programme concerning
the experiments intheSuper-SARA circuit ofthe ESSOR reactor .This
participation concerns thepreparation oftheprogramme ,its execution
and theevaluation ofits results .The cooperation has aduration of
7years ,starting January 1,1931 ,subject totheprovisions ofART .VI
ofthebilateral 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 tothe facilities
ofthe other Party . ,
4.Possible temporary assignment ofpersonnel ofoneParty tothe
laboratory orfacilities oftheother Party ,each such assignment
tobeconsidered onacase -hy-case basis andbethesubject ofa
separate attachment ofstaff agreement between theParties .
5.Thesupply ofequipment relevant totheexecution oftheresearch
"project . . .," ' \
-/■

3.
ART .3-LIMITS OFCOOPERATION •_ .
Thecooperation will extend totheSuper-SARA programme asdefined -
inAnnex Iof .this arrangement . .
1.The USNRC will make available toEURATOM information inthe relevant
field ofresearch pertinent tothetimely ,successful performance of
tests inthecurrently proposed Super-SARA test progranme ,which ithas
the right todisclose either' initspossession oravailable toit,in
,particular therelevant information related tothe USPBFexperiment 1.
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 any information 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 inthe overall exchange .Areview
"meeting oftheAdministrators ortheir representatives will be
"held atagreed-upon intervals toreview the status ofexchange
"and cooperation established under this Arrangement ,torecommend
"revisions forimproving anddeveloping thecooperation ,"and to
> V
discuss topics within the scope ofthe cooperation .The time ,place
"and agenda forsuch meetings shall beagreed upon inadvance ."
Specific provisions concerning theimplementation ofthe scientific -
technical content ofthepresent cooperation aregiven in~Annex II.
ART .5-USE OFINFORMATION AND PATENTS
The provisions ofART.V and VII ofthebilateral arrangement apply .
' Ι' „ -

KXCHANGE AND 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 not been transmitted bythe transmitting Party toother ,
entities (including the receiving Party )except onthe basis
that itbeheld inconfidence y.and .
(d)isnot otherwise available tothe receiving Party from
another source without restriction onits further
dissemination . "
J
3.The Party receiving -proprietary information pursuant tothis
Arrangement shall respect the privileged nature thereof ,provided
such proprietary information isclearly marked with theappropriate
legend ofthe transmitting Party andwith the following (orsubstantially
similar )restrictive legend :
"This document contains proprietary information furnished in
confidence under anArrangement date between the
United States Nuclear Regulatory Commission andEURATOM and shall
notbedisseminated outside theses organizations ,their consultants ,
contractors and licensees ,and concerned departments and agencies of
the Governments ofthe United States and ofthe member states of
EURATOM without theprior approval of , [
This notice shall bemarked onanyreproduction hereof ,inwhole orin
part .These limitations shall automatically terminate when this
information .isdisclosed bytheowner without restriction .

5.
-I.Inregard tothedissemination and use ofproprietary information
.received inconfidence under this Arrangemeot ,"theParties .agree that :
(i)Such information maybedisseminated bythereceiving Party to
•persons within oremployed bythereceiving Party ,and to :
(a)concerned government departments and government agencies
inthe country ormember states ofthe receiving Party ; .
(b)prime orsub-contractors orconsultants ofthe receiving ;
Party located within the geographical limits ofthe 'receiving
Party 'scountry or .member states ,for use only within the
I
framework oftheir contracts with the receiving Party in
.work relating tothe subject matter oftheproprietary
/. .■ _ _information ; - • '
(c)organizations permitted orlicensed bythe receiving Party in
the field ofdevelopment ,design ,construction ,and operation
ofnuclear production 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 anyproprietary Information sodisseminated under
sub-paragraphs (b),(c)and (d),above shall bepursuant toanagreement
.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 intheforegoing subsection (i).The Parties
shall cooperate with each other indeveloping-procedures for
requesting andobtaining approval for such wider dissemination
and each Party will grant such approval tothe extent permitted
byitsnational policies ,regulations and laws .
(iii )Each Party shall exercise itsbest efforts toensure ,that
proprietary information received byitunder this Arrangement is,
controlled asprovided herein .Ifone ofthe Parties becomes
aware chat itv/ill be ,ormay reasonably beexpected tobecome ,
unable tomeet thenon-dissemination provisions ofthis Article ,
itsha.l !immediately inforii th«other Party .The Parties sr.ciil'

6".
thereafter consult todefine anappropriate course ofaction .
(iv)Non-documentary proprietary information provided inseminars
and other meetings organised under this Arrangement ,or
information arising from the attachments ofstaff ,use of
facilities orjoint projects shall betreated bythe Partifcs
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 tothe other under this Arrangement
shall beaccurate tothe best knowledge and belief ofthe Party
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 ."
PATEHTS
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 )'orits contractors v/hile assigned tothe other Party
(Recipient Party )orits contractors ;
(a)The Recipient Party shall acquire till 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 theright ,togrant sub-licenses ,under any
such invention ordiscovery .and anypatent application ,patent or
other orotection relating thereto ,for use intheproduction or
■■/.

utilization ofspecial nuclear material oratomic energy ;and
(b)TheAssigning Party shall acquire allright ,ditle ,and
interest inand toany such invention ordiscoverv inits own
Country ,subject toanon-exclusive ,irrevocable ,royalty-free
license totherecipient party ,with the right togrant sub-
licenses under any such invention ordiscovery and any patent
application ,patent orother protection relating thereto for
use intheproduction orutilization ofspecial nuclear material
oratomic enery .
(ii)Ifmade orconceived bypersonnel other than the personnel referred
toinparagraph (i)above ,asaresult ofattendance atmeetings
orasaresult ofemploying information which had been communicated
under this Arrangement byone Party ,oritscontractors totheother
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 orothers -
protection relating thereto inall countries ,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 from such co-operationi .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 countries should beagreed bytheParties on
anequitable basis . ' ' %.•
Mfeither Party shall discriminate against citizens oftheCountry of
theother Party with respect togranting any license' orsub-license
under any invention ordiscoverv pursuant toparagraph 1above .

8.
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 onthepolicies andpractices ofthe .Parties .
4.Neither Party will assume theresponsibility topay .awards or
compensation required tobepaid tothenationals oftheother Party
according tothe laws ofthe other Country ."
ART .6-COSTS
The USNRC will participate in-kind inthecosts fortheprogramme atan
annual level roughly equivalent to1,500,000 US1981 dollars ormore ,
subject tocontinued annual UScongressional funding ofprogramme support
and maintenance ofSST programme content and progress .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.The Parties 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 .

FOR THE UNITED STATES
NUCLEAR REGULATORY COMMISSION
BY : '
TITLE : .
DATE :FOR EURATOM
COMMISSION OFTHE EUROPEAN COMMUNITIES
BY :• -
TITLE
-«< I-
DATE :

ANNEX 1
Q====M= -Q£–-––=--2-– iSSTfl
1.General
During 1980 ,aTask Force wasestablished
bythe Joint Research Centre ofthecommission ofthe
European Communities todiscuss and reach 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
cerning those aspects ofLWR fuel cluster behaviour which
can lead tosagnif 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.lcal and therir.ohydraulics processes governing LWR
fuel cluster carnage andblockage ,asecond basic objective
isthe correlation ofthe transient fission product release
(FPR )occur :.ngdurzng accident situations with thetype ana
extent ofthe fuel damage provoked .
The consensus SSTP covers fuel cluster behaviour both
for the transient 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.d higher'
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 .
, /The reason for this isessentially that ,while aconsiderable
amount ofwork' hasbeen started orcompleted fortheLB-LOCA ,
activities inthe SFDfield arerelatively behind andrequire
intensification .
LB-LOCA test program
The LB-LOCA part oftheconsensus SSTP hasbeen establi­
shed onthebasis that ismust ,beconfirmatory with respect
tothecurrent out-of-pile LB-LOCA fuel behaviour programs
such asEEBEKAattheKfKKarlsruhe (which areable to
scope well thegoverning parameters andRequire only li­
mited m-pile checks toconfirm thetypicality ofrod-
simulators performance )ar.dcomplementary with respect to
thecurrent m-pile LB-LOCA programs such asPBF atINEL-
Idaho andPHEBUS atCadarache ,France (where thedata
available orexpected should bebacked upbyin-pile tests
which give something new). ~
The SUPE.SSA2A loop isbeing fabricated with thedesign
aim tosimulate the entire LB-LOCA scenario ,blowdown to
reflood ,bymeans ofcontrol 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
J^itswithintherequiredconfirmatory/complementary contextis
coveredbythefollowingtests:
-4Testswith2mlongFWR(type17x17)clustersof32
rods;
-1testwitha2m.longBWR-typecluster(probablytype
6x8E);
-2unspecified teststocoverunforeseenrequirements
ofhiahpriorityarisingatalaterstage.
CoreuncovervandSPDtestprogram
IncontrasttotheL3-LQCApart,theSFDpartofthe
consensus SST?seekstogenerateamorecomprehensive range
ofdata.Thereisnorcurrentlythe,widevarietyofactivity
forSFDasfortheLB-LOCAfield:theonlyotherknown
comparable SFDprogramisthatplannedforthePBFatINEL
-Idaho,startingin1982.ThePHEBUSprogram .mayalso
proposeSFDtests,inwhichcasethesewillalsohavetobe
considered .Forthetmebeing,theSSTPhastoensurea
/

good complementary /confirmatory relationship only with the
PBFprogram . ~
,Considering thebasic objectives stated above and the
large array ofaccident scenar ;oswhich maypotentially lead
toSFD ,asoccurred xnthecase oftheTMI accident ,the
SUPERSARA loop has thedesign aim tosimulate theessential
common feature ofall the SFD scenarios :cluster boildown
anduncovery toprovoke relevant transient ofclad
temperature incombination with relevant transients of
system pressure ,followed byre-submergence and quenching.'
This capability will beused toaddress ,thefollowing
particular SFDobjectives ,
A)Degree ofcluster blockage andFPRdue toclad defor­
mation and rupture atthe low strain-rates possible in
"core uncovery "transients ,especially considering the
effects ofclad oxidation onsuch deformation inthe
high®<-high ^range (1100-1650K ).
•B)Degree ofcluster blockage andFPRresulting from the
■format :onofarubble' bed due tothewidespread oxida­
teonoftherods (upto^1900K ),with orwithout prior
ballooning andrupture ,followed byrod fragmentatj on
either byquencmng (re-submergence )orsystem depres – '
sur;sation .
C)Degree ofcluster blockage andFPR -resulting from the
formation ofaZr/UO^liquid solution above~20705C
(rod "candlil.g ")inthepresence ofwidespread rod >
oxidat-on ,vitn crwithout subsequent rubble bed
provocation ,by -quenching . '
/ • , \
The consensus SFD test ,matrix whxch
fits within therequired complementary /confirmation .relate on
with P3F ,will beattained bymeans ofthefollowing tests :

-5-
-3testswithobjective (A),allwith2mlongP\-FRtype
clustersof32rods;
-4tests\V2thobject .ve(B),3with2mlongPWRtype
clustersof32rods,1witha2mlo.igBWRtypecluster;
-5testswithobjective (c),4with2mlo-.gPV/Rtype
clustersof32rods,1witha2mlongBWRtypecluster;
-2unspecified teststopermittheinclusionofunfore­
seenobjectiveswhichmaylaterbecomeofh:ghpriority.

TABLE1:SSTP.LARGEBREAKLOCATESTMATRIX
|·
TESTN°INTENTIONS ' ·CLUSTER
TYPE .CLADDEFORMATION
CONDITIONSFUEL COMMENTS
■■i
LB-1■INVESTIGATE CLAD'
DEFORMATION INFIPHASEIN
"HEATBEFORELOAD"
CONDITIONSPWR(*)HÉAT-BEFORE-LOAD;
DEFORMATION
AT~1300KFRESH
PRECONDITIONED
COMPLEMENTARY TO
PHEBUS,PBF,NRU
LB-2HIGHPOTENTIAL FORCLAD
DEFORMATION (HIGH<X);
"HEATBEFORELOAD"
CONDITIONSPWR(*)HEAT-BEFORE-LOAD;
DEFORMATION
AT1070ΚFRESH
PRECONDITIONED
LB-3
<ASTESTLB-2BUT'
DEFORMATION IN"LOAD ■
BEFOREHEAT"CONDITIONS 7PWR(*).LOAD-BEFORE-HEAT}
DEFORMATION
AT1070KFRESH
PRECONDITIONEDCONFIRMS .
REBEKA,MRBTF
COMPLEMENTARY TO
NRULB-4
1ASTESTLB-3BUT
INVESTIGATE EFFECTOFFUEL
ÈURN-UPI.E.FUEL·CRACKING ,
RELOCATION ETC.PWR(*).'LOAD-BEFORE--ΈAT;
DEFORMATION
AT^1070KSOME
IRRADIATED
RODS
LB-5ASTESTLB-3BUT
CONFIRMEXTRAPOLATION OF
PWRTESTRESULTSTOOTHER
FUELGEOMETRIESBRW(**)LOAD-BEFORE-HEAT;
DEFORMATION
ATV1070KFRESH
'PRECONDITIONEDCOMPLEMENTARY TO
PHEBUS,PBF,NUR,
REBEKA,MRBTF
LB-6
LB-72UNSPECIFIED TESTSTOPERMITTESTINGOFREMEDIALMEASURESORANYOTHERSTUDYLATERENTIRING
HIGHPRIORITY ·,
(*)17X17TYPEGEOMETRY ­
(**)PROBABLY8X8TYPEGEOMETRY

TABLE2:SSTPCOREUNCOVERY/SEVEREFUELDAMAGETESTMATRIX
TEoTSERIESA:INVESTIGATION OFEXTENTOFCLUSTERBLOCKAGEANDFISSIONPRODUCTRELEASE
DUETOCLADDEFORMATION UNDER"SMALLANDMEDIUMBREAK"CONDITIONS
COMPLEMENTARY TOPBF.
TESTN°CLUSTER
TYPE■INTENTIONTESTTERMINATION/FINALCONDITIONS
SFD-A-1PWR(*)CLUSTERUNCOVERY TOTCLADrv1080-
1200K,THENCLADLOADINGAND
BALLOONING BYSLOWPRESSURE RAMP
ΔΡCLAD–0.005MPa/SCLUSTERRE-SUBMERGED AFTERWIDESPREAD
CLADRUPTURE
SFD-A-2PWR(*)ASSFD-A-1BUTWITHTCLADΜ1350KAND
ΔΡCLADAD.TESTEDINRANGE0.005-0.05
MPa/STOGETDESIREDOXIDATION DURING
BALLOONINGCLUSTERRE-SUBMERGED AFTERWIDESPREAD
CLADRUPTURE
SFD-A-3PWR(*)ASSFD-A-2BUTWITHTCLAD~1650KCLUSTERRE-SUBMERGED AFTERWIDESPREAD
CLADRUPTURE
*17X17TYPEGEOMETRY

TABLE 2(CONT .):SSTP CORE UNCOVERY /SEVERE FUEL DAMAGE \TEST MATRIX
TEST SERIES "B:INVESTIGATION OFEXTENT OFCLUSTER BLOCKAGE AND FISSION RPODUCT RET' ,EASE
WITH NOMOLTEN COMPONENT DUE TORODFRAGMENTATION AND RUBBLE BEDFORMATION ;
.COMPLEMENTARY TOPBF .
TEST N°CLUSTER
TYPE -TNTENTION ; TEST TERMINATION /FINAL CONDITIONS
SFD-B-1 , PWR (*)CLUSTER UNCOVERY TOTCLAD 1900K AT/
ARATE -ν0.-3 K/sTOFROVOKE CLAD
RUPTURE AT'v110OK FOLLOWED WIDESPREAD
CLAD OXIDATION AND EMBRITTLE MENT .
PSYS 8MPaSLOW COOL-DOWN TOAVOID ROD
FRAGMENTATION AND RUBBLE BED
.SFD-B-2 PWR (*) ASSFD-B-1- λFAST COOL-DOWN TOPROVOKE ROD
>FRAGMENTATION AND RUBBLE BED FORMATION
V.
SFD-B-3 ·vPWR (*)
.\ASSFD-B-1BUT WITH CLAD RUPTURE
OCCURING ATr^l650KASSFD-B-2
s., -
SFD-B-3* BWR (**)CLUSTER UNCOVERY TOTCLAD ^1500K WITH
NORUPTURE (APCLAD <0);WIDESPREAD .
CLAD OXIDATION AT'V1300K ;SLOW COOL-
DOWN TOTCLAD ~600K .PSYS ~4MPaPSYS DROPPED FROM 4TOlMPa TO .PROVOKE
CLAD SHATTERING FOR TCLAD ~600K.SL0W
COOL –DOWN CONTINUED TOAVOIÛ FURTHER
ROD FRAGMENTATION
* 17X17TYPE GEOMETRY
** PROBABLY 8X8TYPE GEOMETRY ~ -
- , ' ' i \
i

,TABLE 2(CONT .)SSTF CORE UNCOVERY /SEVERE FUEL DAMAGE TEST MATRIX
TEST SERIES C:INVESTIGATION OFEXTENT OFCLUSTER BLOCKAGE DUETOFORMATION OFA
MOLTEN SOLUTION OFU02 INZIRCALLOY (ROD'^ANDLING "),POSSIBLY
" -PBF,BWRTOST^SSPLES™ry EII,3BLE BR>*Mt«W CONFIRMATORY TO
TEST N°CLUSTER
TYPEINTENTION ' . ·TEST TERMINATION /FINAL .CONDITIONS
SFD-C-1 PWR (*) CLUSTER UNCOVERY TOTCLAD~2300K AT
ARATE ~4K/sTOPROVOKE CLAD RUPTURE
AT-1100ΚFOLLOWED BYCLAD OXIDATION ,
MELTING ANDDISSOLUTION 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 (*) « ASSFD-C-1BUT WITH CLAD RUPTURE
OCCURING AT~1650ΚASSFD-C-2
SFD-C-l PV/R(*)ASSFD-C-1BUT WITH FASTER UNCOVERY
,TOSIGNIFICANTLY EXCEED 4K/sTCLAD
RAMP TOINVESTIGATE MORE EXTENSIVE
CLAD MELTING · 'ASSFD-C-2
SFD-C-5 BV7R (**)ASSFD-C-1BUTWITH ÄPCLAD <UTOGET
CLAD CREEP-DOWN INSTEAD OFRUPTURE -;
POTENTIAL FOR MORE CLAD MELTING AND
ASSESSMENT OFBWS SUBASSEMBLY MELT-
THROUGHASSFD-C-1
* 17X17TYPE GEOMETRY
**PROBABLY 8X8RTYPE .GEOMETRY

TABLE2(CONT.):
TESTSERIESD:SSTPCOREUNCOVERYSEVEREFUELDAMAGETEST.MATRIX
UNSPECIFIED TESTS-
TESTN°SFD–D–1:)2UNSPECIFIED TESTSTO™3RMITSTUDIESLATERENTERINGHIGHPRIORITY,
TESTN°SFD–D-2:)CURRENTLY UNFORSEEN
I

-H .
AMME -II
Dilaterai Tcchnical IinDloinontation Coirmi ttce
The contractiong Parties hereby set upaBilateral Technical
Implementation Committee toassure the execution ofthe
co-operation provided for inthis Arrangement .
Each Party will designate itsmembers 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 .

M
ANNEX III
The basic USNRC in-kind contribution shall beatanannual level roughly
equivalent to1,500,000 US1981 dollars ormore ,(subject tocontinued -
annual UScongressional funding ofprogramme support andmaintenance of
SSTprogramme content andprogress )asdefined inART .6oftheArrangement .
The form ofthe UScontribution ,listed inorder ofpriority ,shall be :
1.NRCbasic supply of3test trains including all precalculations ,R&D ,
operational data ,safety analyses ,QA-QC results ,inaddition tothe
test train hardware and .components for tests and schedules "equivalent .
toorbetter than SFDA-1 ,SFDB-1 and SFDC-1 ofthe currently planned
SSTprogramme ,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 of -PBF 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 of .thetransient 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 inthe US :
4.1 .special analyses ,defined and requested byIspra and agreed toby
NRC ,tosupport ;
4.2 .back-up for item 2abovej
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:oneman 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 ofthethree test trains
may not betimely .NRC budget projections donot allow for initial annual
in-kind contributions ofmore than dir .1.5m thus ,thepriority 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 .