Results of Ultrasonic Transducer (ULTRA) Irradiation Test Joshua Daw, Joe Palmer (INL) Pradeep Ramuhalli, Paul Keller, Robert Montgomery (PNNL) Hual-Te Chien (ANL) Bernhard Tittmann, Brian Reinhardt (PSU) Gordon Kohse (MIT) Joy Rempe (Rempe and Associates, LLC (Formerly INL)) Jean-Francois Villard (CEA, France) NSUF User’s Week June 22-25, 2015 Goal – Enable in-core use of ultrasonic sensor technologies for monitoring a wide range of parameters in material and test reactors
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Results of Ultrasonic Transducer (ULTRA) Irradiation Test Joshua Daw, Joe Palmer (INL) Pradeep Ramuhalli, Paul Keller, Robert Montgomery (PNNL) Hual-Te.
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Results of Ultrasonic Transducer (ULTRA) Irradiation Test
Joshua Daw, Joe Palmer (INL)Pradeep Ramuhalli, Paul Keller, Robert Montgomery (PNNL)Hual-Te Chien (ANL)Bernhard Tittmann, Brian Reinhardt (PSU)Gordon Kohse (MIT)Joy Rempe (Rempe and Associates, LLC (Formerly INL))Jean-Francois Villard (CEA, France)
NSUF User’s WeekJune 22-25, 2015
Goal– Enable in-core use of ultrasonic sensor technologies
for monitoring a wide range of parameters in material and test reactors
Potential for Increased Safety and Improved Performance
Real-time, high resolution/accuracy data provide insights needed to resolve data
Instrumentation is Available in MTRs but Current Sensors have Significant Limitations
Parameter Sensor Comments
Temperature
Melt Wires Peak value, resolution limited by number of wires, Post Irradiation Examination (PIE) required
SiC Monitor Peak value, 100-800 oC temperature range, PIE required
Thermocouples (Types N,K) 1100 oC maximum operating temperature, decalibration due to constituent migration
Thermocouples (Doped Mo/Nb-alloy High Temperature Irradiation Resistant
Thermocouples (HTIR-TC))
1800 oC maximum operating temperature, electrical insulation degradation
Thermocouples (Type C) Decalibration due to transmutation caused by thermal neutron flux
Density/Displacement
Linear Variable Differential Transformer (LVDT)
1-10 mm resolution, qualified to 500 oC
Diameter Gauge 1-10 mm resolution, qualified to 500 oC
Crack Initiation/GrowthDirect Current Potential Drop
(DCPD) MethodSensitive to water chemistry, accuracy limited to ~20%
Young’s Modulus Loaded Creep Specimen LVDT based measurement, accuracy limited to ~10%
Fission Gas Evolution/Pressure
Sampling Multiple isotopes
LVDT Based Pressure gauge 220-1020 psi range, 2.9-7.3 psi accuracy
Ultrasonic Sensors Offer Potential Improvements Over Existing Sensors As Well As New Measurements
• Industrial applications demonstrate ultrasound-based sensors offer unprecedented opportunities for measuring numerous parameters – Temperature (up to 3000 °C) [Some prior use, current development]– Fission gas composition and pressure [In use in France]– Coolant level, flow– Dimensional changes (down to ~1 µm) [Waveguide method in
development]– Microstructure changes (e.g., grain/pore development, crack initiation and