LEADER 05110nam 2200625Ia 450 001 9910786032303321 005 20230721044736.0 010 $a1-283-92028-X 010 $a1-61499-181-2 035 $a(CKB)2670000000326854 035 $a(EBL)1109541 035 $a(OCoLC)827623447 035 $a(SSID)ssj0000803551 035 $a(PQKBManifestationID)11518428 035 $a(PQKBTitleCode)TC0000803551 035 $a(PQKBWorkID)10824112 035 $a(PQKB)10706246 035 $a(MiAaPQ)EBC1109541 035 $a(Au-PeEL)EBL1109541 035 $a(CaPaEBR)ebr10641749 035 $a(CaONFJC)MIL423278 035 $a(EXLCZ)992670000000326854 100 $a20080313d2007 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aExperimental and numerical stability investigations on natural circulation boiling water reactors$b[electronic resource] /$f[Christian Pablo Marcel] 210 $aAmsterdam $cDelft University Press, IOS Press$dc2007 215 $a1 online resource (160 p.) 300 $aOriginally presented as the author's thesis (doctoral)--Technische Universiteit Delft, 2007. 311 $a1-58603-803-6 320 $aIncludes bibliographical references. 327 $aTitle Page; Table of Contents; Summary; Samenvatting; Chapter 1. Introduction; Introduction; Natural circulation BWRs basic principle; Classification of BWR instabilities; High Pressure vs. Low Pressure stability; Coupled Neutronics-Thermal-hydraulics; Motivation behind the present work; Outline of this thesis; References; Chapter 2. Downscaling the thermal-hydraulics of natural circulation BWRs: The GENESIS facility; Introduction; Design philosophy-The scaling; Defining the operational conditions; Geometrical scaling; Scaling of the dynamics; Treatment of the distortions 327 $aScaling sensitivity to the operational pressureApplication of the proposed scaling design approach; Conclusions; References; Chapter 3. Experimental investigations on the stability of natural circulation BWRs; Introduction; The VRF system; The VRF system design; The VRF system implementation; Stability performance of natural circulation BWRs; Experiments on thermal-hydraulic stability; Experiments on reactor-kinetic stability; The ATHLET numerial results; Conclusions; References; Chapter 4. An experimental parametric study of natural circulation BWRs stability; Introduction 327 $aGENESIS improvementsParametric study; Effect of the improved VRF system; Effect of the modeling of the ESBWR fuel rods; Effect of changing the rod diameter; Effect of using a MOX fuel; Effect of the pressure; Effect of the feedwater sparger position; Effect of the void reactivity feedback coefficient; Conclusions; References; Chapter 5. Experimental and analytical investigations on flashing-induced instabilities in a single channel; Introduction; The CIRCUS facility in the single chimney configuration; Experimental results; The stability maps; Dynamical characterization of the instabilities 327 $aFrom single-phase to stable two-phase flowHigh subcooling stable flow circulation; Intermittent oscillations; Sinusoidal oscillations; Low subcooling stable flow circulation; Analysis of the dynamics of the flashing front; Analysis of the inertia of the loop; A lumped parameter model; Experimental results vs. numerical results; A numerical parametric study; Conclusions; References; Chapter 6. Flashing-induced oscillations in parallel channels; Introduction; Description of the CIRCUS facility with two chimneys; Experimental results; The stability behavior 327 $aPhenomenological description-From region I to IVRegion I-High subcooling stable flow circulation; Region II-Unstable in-phase flow circulation; Region III-Unstable a-periodical oscillations; Region IV-Unstable out-of-phase oscillations; Analysis of the instability mechanism; Single channel stability vs. two-parallel channels stability; Non-linear analysis of the oscillations; Experimental evidence of bifurcations; Investigations on the nature of the a-periodical oscillations; Conclusions; References; Chapter 7. Conclusions and recommendations; APPENDICES 327 $aAPPENDIX A: The GENESIS facility technical details 330 $aIn the design of novel nuclear reactors active systems are replaced by passive ones in order to reduce the risk of failure. For that reason natural circulation is being considered as the primary cooling mechanism in next generation nuclear reactor designs 606 $aBoiling water reactors$xStability 606 $aNuclear reactors 615 0$aBoiling water reactors$xStability. 615 0$aNuclear reactors. 676 $a621.48/34 700 $aMarcel$b Christian Pablo$01515215 712 02$aTechnische Universiteit Delft. 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910786032303321 996 $aExperimental and numerical stability investigations on natural circulation boiling water reactors$93750850 997 $aUNINA