Dual gaging 2200/sup 0/C Johnson Noise Power Thermometer
A Johnson Noise Power Thermometer (JNPT) for temperature measurements to 2200/sup 0/C in reactor fuel rods has been fabricated and is being test evaluated for use in the Loss-of-Fluid-Test (LOFT) reactor safety tests. Temperature is determined by measuring the thermal noise spontaneously generated in a sensor coil. Thermoelement wires are used for connecting leads to the sensor coil and thereby provide for simultaneous temperature measurement as a thermocouple. Evaluation units have been fabricated from 1/16-inch diameter Re/W sheath material and HfO/sub 2/ insulators using a 0.010-inch diameter Re sensor coil and Re/W thermoelement wires. The thermocouple probe is sealed with an alumina ceramic-to-metal seal and a stainless steel sheathed compensating lead cable transmits the output signal to the measurement instrumentation.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (United States)
- DOE Contract Number:
- AC14-76FF02170
- OSTI ID:
- 5110118
- Report Number(s):
- HEDL-SA-2198; TRN: 80-016034
- Country of Publication:
- United States
- Language:
- English
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