Transcription

TECHNICALNOTE SRSC N" 87.96FISSILE NTSMeasurement ExperimentsSILENE ReactorF. BARBRY

xperimentalon tweencharacteristicperiod)theparametersand 2 stfissileup geffect.On ratedoccurredverymayduringquicklybe affirmedthata fissile(i.e.a signifi-solutioninlesspowerthant10

3CRITICALITYReview of PressureACCIDENTS IN SOLUTIONWave MeasurementExperimentsintheReactorSILENE1. EXPERIMENTAL OBJECTIVESSeveralintheSILENEby whichanspecificreactorcl]a [2]phenomenagoverningofa othe8 isisobviouslyaUSA smssolutionsensorthehighvesselfissiletheandon thefortoobjectivephenomenacan ndisthewave ephysicochemicalandthegenerationwave.Thesewave) forwave on theA longersafetyValducthisinwas etheat- ApplicationthatofduringinformationproducedAand datacorrelatingpower,inexcursion.as partconductedfundamentalwavemidplane,- d,experimentsbubblelongtermKEWB F2]safetycriticalityisonlya pressure; itutethegroundworka

veofthethisstudymediumreactorpressureoperatinga differenton thesensorpiezoresistiveresponsea CEC essuremidplanea tightmodel.sensorresistant,a minimumtoreactorincludesthatpressurea ntThedifficultrelativelyFurthertime.wirenature: whiletheenvironmentbe rincipal19 show otalQtbeenisofEXPERIMENTALwithdateOF EXPERIMENTALsolutionvesseltimesfissileCEC BELLchoiceisinfluxsensorAND ghas nottheTheconductingnitratetheatwas placedof maximumand edthetotransientscriticalityThemadea uranylpoweran accidentalKISTLERlimitedREACTOR CONFIGURATIONperform8 ts.:concentration% 23511 ures(see-I)momentofthefirstpeak3 throughThe following3

eakvalue)EnergyE peakto maximumpressure(relativefirstto maximumtP&Pofintegratedto ?maximumpower).4. PROPOSEDRELATION FOR Ap IN LIQUID retheperiod)theand fW l/Teformalismdeterminethevariation)Ap tegrated 1.14x lo-l9and(UfI! isdefinedinexpressionexcursionup tothe- ons,us withasshowninfigure20).5. INITIALCONCLUSIONThesesbe lysispurposestosafetytobe rgraphpowerwavethebpthespeedconcretely,thea powerjeopardizeThe expressionreduringestimateofpowerareproduced.No 21plotsthan10 d f clearlytheonmodelexcursion,integritytowandthea simpleandbywthepeak?.ofthepressureshowsthata signi-fissilesolutionfor

wthorgrownfieldinSILENEand theirbetweenlowerthesensorpressurewavea anypursuingthesuchthisa ltheymicrobubbles.inthelightofoftofreeas scence,be calledarearapid, as wellwithouti.e.themay be advanced(growth,projectthetheexperimentsby onwhatcomparisontheas bubblesasdetectsprovidesothernew modelsinstanttimeusedimprovement.as soonsize,thesesdetectedto ctora sreachedfirstareFrom a ncewhichmechanismstheonsetwavethattheIn fact,createdsizeandthatultrasonictheIt is olution,pressuremica1thethat1 indicatesfromlagthethatpeak,theaspositionsas eThetheTableandtothatgasway ressurerelatednotthemethodphase;theafterby onlylimitedofviewassignal? .Allgaseswassimultaneouslykineticsinincludeand amplitudea olutionthetheradiolysismicrobubblesetc.).no doubtbe volpartners

III Configuration1II SILENEI-Ilead shieldI Cut 61 g.l-1IIICut 71 9.1-l,I iI experi-IIII s1-1531 S2-153I S2-169I301I’40.24 I 1v7538-.17 II40:50 IIIIIbars5.41.563961284441.63 10lg2.74 10193.38 10183.32 lo198.83 10140 .41.0139.43315IIIII*1.84.338516139241*0238.16I la81 80I8,664421.38 lo192.11 10193.88 10182.19 10192.44 13162.71 1019I A;, iw- 11I ’ /I -,4--l1p.c.m‘-----/IIsIIII1.20402 44 i 1.12051.1190T1.12302.761 1.32451.3210I1.32650‘ 6 4113821 i74) 6.34006.342I 6.34804.28121952.761 1.3370I1.001 4.801.3355I 1.3390; 19414.1712195III-I 7g81. 13 1G71 5. 47 I2370I1.63053- O2 I lm30151.66 1 1.5853,26IIIi1.19152.7I1.618S1 1.2025I9.6 10161Is II1.594III1.5680.5711290IIII2.981 1\2570II1tp1.3030I9.47 102qsI1to1.1940I7.55 l#jTABLE Ipit1I1.27 10171 6.35125406.4 10151lerl2; 54 1 1.62855.02 1Ciq4.6 1016;“t3.22 I 19751.23 [email protected] 5.37 I2350III s3-16gI s4-16g1 S5-1691 ApI39 .1 S2-152II 2!fi on.s-lIfissionsIi meritI1 Sl-169unshieldedI1II1.2550I 1.2580I

-.IReactivityrod /.COrQ unds/-/-PrQssurQExternalnsutron sourceI icfI!1 -2000” SILENE”Experimentaltransducerset up.

.-.IQ!!3POWER-,--.--.-.--- - - .- . .----.-.---.Ef&km/s.). IPRESSURE( bon)10.-. -.--.-.--- -------.--SILENElo!.:.--------.--.---Sl-1529. --.--.xl!?0--.--- l-.-7Jo!?-----.-.-.- -.ial. --KISTLERPRESSURESEN.SOR (Fissilesolution)14-.-.-.-.---.-I-vuBELL----.-CEC PRESSURE--SENSOR (ReactorVessel)---. -13L.l- - -.---I. -2.10’2.-I,-d1.55TIME2.051.80FIG.3- SILENE- Reactor. KISTLERPOWER and PRESSURESensor. BELL CEC omofthereactorvessel0

--.1019--.--- A----.--10’8- ----.----.ldc.----- -.--.-I----.POWER E(fissions/s.) .t iPRESSURE 6(bo 1:j,t SILENEt t A - t .t Sl-152,oIjI/ -tI.94 .P III’t8 ;- t .---1015---- t t 1rP------.-. .---- - I t KISTLERPRESSURESEN,SOR (Fissilettsolution)Y tBELL CEC PRESSURESENSOR (Reactori k.“y /\’. s x ’2.\ :.t3.\'Y -tVessel)4 -.r .\:tiI‘c2x .i1TIME (s)1.625FIG.41.6LO1.665SILENE- Reactor. KISTLERPOWER and PRESSURESensor. BELL CEC kreactorvessel(

.POWEREPRESSURE(bdflsfl0ns/ 5. )SILENE.S2,15210-- ---------5d!---- .--.-.---- -.-.--8. -.;,BE,LL CEC PRESSURESENSOR URESEN,SOR (FissileSsolution)d!-. .- . ------.--43TIME (S)LO"1020laC5FIG. 5 -SILENE1.70- Reactor. KISTLER1095. POWERand PRESSURE SIGNAL RECORDINGSensor. BELL CEC Sensorinatthethesolutionbottomofthereactorvessel(

-.- .----.4POWER( fissionsE/5.)---- -- c---.b----PRESSURE (bars SILENES2 -152- i : c.:cc 1c 7 c 11 . -b. -- -.k C’A *BELL CEC PRESSURE(ReactorVessel) (Fissile I.:-zISENSORI5solution)t i--I--.- - I -----c--/l3- ,. .- .4i./.-.IIj 10”I 1.250TIME (s)1.275FIG.6 - SILENE 1.300- Reactor. KISTLER1.325POWER and PRESSURESensor. BELL CEC reactorvessel

.I\POWEREln’91--.(Fissions/ s.l--. .--.-.------.- .PRESSURE-.SILENE Sl,153I!2-- ---A -.-.---(ban)-.-.Id:- - -.--.-.------ .- .-II--I!20 -jI--.--.,.--. .--.ln15---.---.lo!!--- --- -. .-.-. --.--.d . .-. -.r.KISTLERPRESSURESENPOR (FissileBELL CEC PRESSUREsolution)SENSOR (ReactorVessel)32.TIMEla”1f7 - SILENEQ)1,901065.FIG.(S)II- Reactor. KISTLER211.15POWER and PRESSURESensor. BELL CEC reactorvessel

PRESSURE( bars)106.,I1.L.KISTLERBELL CEC PRESSURE10"PRESSURESEN,SOR (Fissile\SENSOR (ReactorI1,565I-TX0FIG.8 - SILENEsolution)- Reactor. KISTLERTIME (S)1,61511.590POWER and PRESSURESensor. BELL CEC reactorvessel

SURESZ- 153SEN,SOR (Fissilesolution)SENSOR (ReactorVesse\, BELL CEC PRESSURE- -.’-.,*13.-. .-.- ’; l!L1:- 3TIMEFIG.9 - SILENE- Reactor. KISTLERPOWER and PRESSURESensor. BELL CEC fthereactorvessel

POWER E----(fissions/s.)ILQ!!-.-- . -r. . .- .SILENE:.’-b-Lots.-- -.-- iS2-153 PRESSUREb i-- --loI?.- ---.--.- ---KISTLER PRESSURE.---BELL CEC PRESSURESENSOR (ReactorVessel)10’2IO”-XTI -1.175FIG. lo-SILENE - ReactorI.1.200TIME (S)0,1.225POWEkand PRESSURE SIGNAL RECORDING. KISTLER Sensor in the solution. BELL CEC Sensor at the bottom of the reactorvessel

FIG. 11-SILENE - Reactorversuspowertime.and fissile. solutionpressurevariations1,3:.:3.:!z.3

.-.-.;.-. -- . - .POWER Efissions.sec-1Sl 169SILENE19- -- .- --18--.-.- -----.- --- -.--Y-- --------PRESSUREtbod ,’--.- ---168p7I---i---'.-- --6' In15!---.,-. I:r- - -j - --I-.,.--5An!4-- --- -. - .--4KISTLER PRESSURE SEN,SOR (Fissilea!?-. .solution): ‘1’ -c : / kc.;ti I, tF . t i I10”1,1[11. ,ll.25FrG* l21.125- SILENE - lutionpressure\variationsc

ENSOR(Fissilec ---solution)---e- TIMEIO” I -- 1.m(S)

.POWERESILENE1fissions.sec19-----.-- --. -.-- --. . 18-.- -- . .- 2,169 I. i cb.ti lb -.-.-.--- ------ -----PRESSURE- -t(bon) ' l. 0 k - - t6/- .-I--/- .-.: .‘K'i.TLER PRESSURESEN,SOR (Fissilesohtid.,iTIME(S)L1.3125FIG. 14- SILENE1.325- ssure\variations-2

FIG. 15w7W - SILENE- Reactorversuspowertime.and s

.FIG.w7wh1016 - SILENE - Reactor power and fissileversus time.'solutionpressurevariations

-POWER. -.--.-fissions.secE-1I-- -19--.m---- t cbt -6 L t , SILENE P S4-169t .t tti-4. tt ettiti ti---rg,--, -. -} - -.!!.-- -*i.- .a!!.--- --.d . !fIO”, uii.jir.iKISTLER:PRESSURESEN,SOR (Fissilesolution) LLIIiTIME1.3325F1G* l7- SILENE(S)A1.3575.1.3&i- ariations\f

ISTLERPRESSURESEN,SOR (Fissilesolution)J10",l,OOlll50I.25FIG.18- SILENE- ureTIME-(S)variations--

POWER(fissi0ns.sE-1) -. . .-.-t - tt- k1 c i *-*to!!---------- - t---- t t*EL7---- t t l.c*E SILENE-t 9,173tct tPRESSURE d(bon1-10’6---- -.--xf------ -.---.---t0ttt t t . 7 I ? t . * t.- h I. t 6iiLO!4.- ---i-r KISTLERc-- ---- -.---.PRESSURESEN.SOR (Fissilesolution)cl&.--. .- - .ii,e.-.TIMEIO"1.25251nZFIG.19- SILENE1.265- pressurevariations- .

ApPressurewave( in bars)6IIX Configurationcu t /rl5with lead61 g. 1”UnshieldedCutf:4321FIG.20:SILENE-Ap f(&j

,A p P[ ssu& aveIn109\8\7x Configurationcut cl65withleadshield61g.l-1Unshieldedconfigurationcu t ,” 71 g. L -I\4\\r3\2\\l(C\,.8\\765\\L\21FIG. 21 :.%W’E-Pressure3wave45T2 doublingas a function6timeof doubfing7(intime.8ms 910

REFERENCES1I:1solutionfueled- SILENE : A typicalF. BARBRY - InternationalSymposiumDevelopmentof low and Medium fluxMIT CAMBRIDGE (USA) act.1983.[I2- Pointsur les connaissancesen matierede formationde gaz de radiolyselors d'une excursionde criticite'en solution.F. BARBRY note techniqueSRSC N" 87.83 - fe'vrier1987[I3- Etude et mesures d'ondesde pressionmilieufissiledivergent.F. BARBRY - P. CENA - Note techniqueresearchon theresearchau seinreactoruse andreactors.d'unSRSC N" 21 mars1980.

KISTLER PRESSURE SEN.SOR (Fissile solution) BELL CEC PRESSURE -- SENSOR (Reactor Vessel) 2. I,- d TIME (S) 0 1.55 1.80 2.05 2.30 FIG.3 - SILENE - Reactor POWER and PRESSURE SIGNAL RECORDING . KISTLER Sensor in the solution .