Profile SFR-31 NATAN GERMANY. NATrium-VersuchsANlage (in German) Liquid sodium
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1 Profile SFR-31 NATAN GERMANY GENERAL INFORMATION NAME OF THE ACRONYM COOLANT(S) OF THE LOCATION (address): OPERATOR CONTACT PERSON (name, address, institute, function, telephone, ): NATrium-VersuchsANlage (in German) NATAN Liquid sodium Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Fluid Dynamics, MHD Department, Dresden, Germany HZDR Sven Eckert, HZDR, Bautzner Landstr. 400, Dresden, Germany, Head of Department Magnetohydrodynamics, Tel , STATUS OF THE In operation Start of operation (date): 1988 MAIN RESEARCH FIELD(S) Zero power facility for V&V and licensing purposes Design Basis Accidents (DBA) and Design Extended Conditions (DEC) Thermal-hydraulics Coolant chemistry Materials Systems and components Instrumentation & ISI&R TECHNICAL DESCRIPTION Description of the facility The facility NATAN is a liquid sodium loop equipped with three different test sections for thermal-hydraulic experiments, tests of components and instrumentation as well as for investigations of the behaviour of different materials under the impact of flowing sodium. The facility operates with an inventory of 120 l sodium at temperatures up to a maximum of 400 C. All components to be in contact with the liquid metal are made of stainless steel. The facility consists of two storage tanks with argon cover gas, an expansion tank, an electromagnetic pump, a cold trap, a pluggingmeter, a cooler and the piping system. All pipes
2 and components are equipped with electrical heaters and thermal insulation. The operating status of the facility is monitored by thermocouples, pressure sensor gauges and electromagnetic flow meters. Argon gas can be injected at various positions of the facility in order to investigate the behaviour of liquid metal two-phase flows. Diverse magnetic systems are available for magnetohydrodynamic studies focusing on the effect of magnetic fields on the mean flow, the turbulence and the heat and mass transfer. The NATAN facility provides two vertical and one horizontal test section with mainly rectangular cross sections of mm 2. A maximum flow velocity of about 1.5 m/s can be achieved in this cross-sectional area. Specific sensors can be installed for investigations of flow structure and transport processes. Acceptance of radioactive material No Scheme/diagram FIG. 1. Scheme of the NATAN facility
3 3D drawing/photo FIG. 2. View of the NATAN facility FIG. 3. View of the electro-magnetic pump of the NATAN facility
4 FIG. 4. Views of the NATAN test sections: Horizontal test section (left), vertical test sections (right) Parameters table Coolant inventory sodium inventory 120 kg Operation < 400 C temperature Test sections TS 1 Horizontal, mixing boxes for flow homogenization, duct length: 2.5 m, cross-section: mm 2, max. Na velocity: 1.5 m/s, Options: magnetic system, wall heating for heat transfer studies TS 2 Vertical, height: 3 m, cross-section mm 2, max. Na velocity: 1.5 m/s, Options: gas injection, magnetic system TS 3 Vertical, height: 2 m, cross-section: circular with 45 mm diameter, max. Na velocity: 2 m/s, Option: gas injection Instrumentation Thermocouples, pressure transducer, electromagnetic flow meter, Gas injection system, ultrasound Doppler velocimetry (UDV), Contactless Inductive Flow Tomography (CIFT), Inductive system for bubble detection, Local electrical probes for measurements of turbulent
5 properties and void fraction measurements COMPLETED EXPERIMENTAL CAMPAIGNS: MAIN RESULTS AND ACHIEVEMENTS Investigations of the behavior of liquid metal two-phase flows under the influence of an external DC magnetic field Experimental studies on the properties of MHD turbulence Experimental studies of the effect of DC magnetic fields on the heat transfer Tests of diverse materials in liquid sodium Tests of measuring techniques (for example: ultrasonic or inductive techniques) PLANNED EXPERIMENTS (including time schedule) Tests and qualification of various measuring techniques and instrumentation TRAINING ACTIVITIES Training activities can be agreed with HZDR for the operation of the experimental campaign under the supervision of HZDR qualified staff. REFERENCES (specification of availability and language) 1. LANGENBRUNNER H., Die Entwicklung zur Natrium-Test-Anlage NATAN, Internal report ZFK-726, Dresden, (Ge) 2. ECKERT S., GERBETH G., LIELAUSIS O., The behaviour of gas bubbles in a turbulent liquid metal magnetohydrodynamic flow Part I: Dispersion in quasi-twodimensional magneto-hydrodynamic turbulence, Int. J. Multiphase Flow 26, 45-66, (En) 3. ECKERT S., GERBETH G., LIELAUSIS O., The behaviour of gas bubbles in a turbulent liquid metal magnetohydrodynamic flow Part II: Magnetic field influence on the slip ratio, Int. J. Multiphase Flow 26, 67-82, (En) 4. ECKERT S., GERBETH G., WITKE W., LANGENBRUNNER H., MHD Turbulence Measurements in a Sodium Channel Flow Exposed to a Transverse Magnetic Field, Int. J. Heat Fluid Flow 22, , (En) 5. ECKERT S., GERBETH G., Velocity measurements in liquid sodium by means of Ultrasound Doppler Velocimetry, Exp. Fluids 32, , (En) 6. ECKERT S., BUCHENAU D., GERBETH G., STEFANI F., WEISS F.-P., Some recent developments in the field of measuring techniques and instrumentation for liquid metal flows, J. Nucl. Sci. Techn. 48, , (En)
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