Arbeiter, Frederik

Klein, Christine

Schlindwein, Georg

Schwab, Florian

English

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KIT – University of the State of Baden-Wuerttemberg andNational Research Center of the Helmholtz AssociationSteady state and transient thermal-hydraulic performance of the IFMIF-HFTM irradiation rigs and containers with modeling of nuclear heating Christine Klein, Frederik Arbeiter, Georg Schlindwein, Florian SchwabInstitute for Neutron Physics and Reactor Technology(INR)Poster contribution P4.18029th SOFT, 2016, Prague, Czech RepublicBackground: International Fusion Materials Irradiation Facility (IFMIF) High Flux Test Module (HFTM) a dedicated device to irradiate material small specimens with neutrons having an energy spectrum peaked near 40? MeV with annual doses in therange of 20 - 150 dpa (displacement per atoms per fullpower year) Design database for DEMOExperiments:HFTM “single-rig” (HFTM-SR) experiments a single 1:1 irradiation rig model is tested, the neighboring rigs were modeled with heater platesHFTM “double compartment” (HFTM-DC) experiments a fully equipped prototype with three heated rigs was tested. Heater cartridges substitutethe nuclear heating.Aims:uniformity of temperature fields under different heater and flow conditions with and without nuclear heaterstemperature spread measured should be less +/- 3% of the nominal absolute temperature (+/- 19 K for 350 °C)Conclusions:• The full range of operation temperatures (250 - 550°C) required for the IFMIF HFTM could be well achieved and well controlled with and without “nuclear” heater power in HFTM-SR and HFTM-DC experiments• Uniform temperature fields under different heater and flow conditions• Temperature spread measured inside a capsule is in the range of +/-3K in the lateral x direction and +2K / -8K in the vertical z direction for the 350°C reference case for HFTM-DC experiment • No unforeseen thermal hydraulic effects like oscillations, hysteresis etc.• The pre-heating to 350°C: 135 sec., cool down to 50 °C roughly 315 sec.MQHFTM-SR experimentTCap = 350 °CTCap = 450 °CTCap = 550 °CHFTM “double compartment” (HFTM-DC)zx yzxyTA1TA2TA3Steady state all capsules same temperature level,mass flow 14.6 g/s, pressure 2.6 bar absSteady state all capsules same temperature level,mass flow 14.6 g/s, pressure 2.6 bar absSteady state, capsule nominal  temperature 350 °C ,mass flow 14.6 g/s, pressure 2.6 bar absM  [g/s] TCap [°C] Tin  [°C] Tout  [°C] 7.93 450 37.07 99.01    Q  [W] Tmean   [°C] ∆Tx   [°C] ∆Tz   [°C] 2762 441 6.08 1.52 M  [g/s] TCap [°C] Tin  [°C] Tout  [°C] 7.93 450 37.07 99.01  Q  [W] Tmean   [°C] ∆Tx   [°C] ∆Tz   [°C] 2762 441 6.08 1.52 M  [g/s] TCap [°C] Tin  [°C] Tout  [°C] 7.93 350 32.66  79.72  Q  [W] Tmean  [°C] ∆Tx   [°C] ∆Tz   [°C] 2139 339.5 4.04  1.08 

Steady state and transient thermal-hydraulic performance of the IFMIF-HFTM irradiation rigs and containers with modeling of nuclear heating

https://publikationen.bibliothek.kit.edu/1000059631/3898475

Steady state and transient thermal-hydraulic performance of the IFMIF-HFTM irradiation rigs and containers with modeling of nuclear heating

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