Ultrasonic and Johnson noise fuel centerline thermometry
- eds.
Rhenium ultrasonic (UST) and Johnson noise (JNT) thermometers were used to measure fuel centerline temperatures of 900--1500$sup 0$C in capsules irradiated in the HFIR for periods of 1000--3000 hrs. Transmutation of rhenium by thermal neutron absorption caused large drifts in UST calibration but none in JNT calibration. Whole capsule, post irradiation calibration was used to measure drift in UST and to provide a calibration correction. Calculation of the temperature and the resistance of JNT rhenium sensor elements by noise power measurements have shown no temperature drift in over 1100 hrs at 1250$sup 0$C. Performance of W--Re thermocouples UST and JNT in fuel irradiation centerline thermometry is compared. (auth)
- Research Organization:
- Oak Ridge National Lab., TN; Commission of the European Communities, Petten (Netherlands). Joint Nuclear Research Center; UKAEA Research Group, Harwell. Atomic Energy Research Establishment
- NSA Number:
- NSA-33-022549
- OSTI ID:
- 4060118
- Report Number(s):
- EUR-5395(Vol.2); CONF-741226-P2
- Resource Relation:
- Conference: International colloquium on high temperature in-pile thermometry, Petten, Netherlands, 12 Dec 1974; Other Information: Orig. Receipt Date: 30-JUN-76; Bib. Info. Source: EUR (EURATOM); Related Information: International colloquium on high-temperature in-pile thermometry
- Country of Publication:
- CEC
- Language:
- English
Similar Records
Johnson Noise Thermometry for Advanced Small Modular Reactors
A Novel Technique Applying Spectral Estimation to Johnson Noise Thermometry
Related Subjects
N46400 -Instrumentation-Miscellaneous Instruments
220200* -Nuclear Reactor Technology-Components & Accessories
*THERMOMETERS- PERFORMANCE
CALIBRATION
DESIGN
FUEL ELEMENTS
IN CORE INSTRUMENTS
NOISE
RHENIUM
TEMPERATURE MEASUREMENT
TUNGSTEN
ULTRASONIC WAVES