The temperature measurement of a very high temperature core melt is of importance in LAVA (lower-plenum Arrested Vessel Attack) experiment in which gap formation between core melt and the reactor lower head, and the effect of the gap on thermal behavior are to be measured. The existing temperature measurement techniques have some problems, where the thermocouple, one of the contact methods, is restricted to under 2000°C, and the infrared thermometry, one of the non-contact methods, is unable to measure an internal temperature and very sensitive to the interference from reacted gases. So, in order to solve these problems, the delay time of ultrasonic wavelets due to high temperature is suggested. One of the key initial conditions to be measured in LAVA is the initial corium melt temperature. To measure it, the LAVA measurement group has developed several kinds of UTS’s. As a first stage, a molten material temperature was measured up to 2314°C. Also, the optimization design of the UTS (ultrasonic temperature sensor) with persistence at the high temperature was suggested in this paper. And the utilization of the theory suggested in this paper and the efficiency of the developed system are certified by performing experiments.
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ASME 2002 Pressure Vessels and Piping Conference
August 5–9, 2002
Vancouver, BC, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4659-8
PROCEEDINGS PAPER
Development of Ultrasonic Temperature Sensors for Ultra-High Temperature Measurement in Nuclear Reactor Vessel Available to Purchase
Kwang-Soon Ha,
Kwang-Soon Ha
Korea Atomic Research Institute
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Rae-Joon Park,
Rae-Joon Park
Korea Atomic Research Institute
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Sang-Baik Kim,
Sang-Baik Kim
Korea Atomic Research Institute
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Hee-Dong Kim,
Hee-Dong Kim
Korea Atomic Research Institute
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Hee-Young Kang
Hee-Young Kang
Korea Atomic Research Institute
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Kil-Mo Koo
Korea Atomic Research Institute
Kwang-Soon Ha
Korea Atomic Research Institute
Rae-Joon Park
Korea Atomic Research Institute
Sang-Baik Kim
Korea Atomic Research Institute
Hee-Dong Kim
Korea Atomic Research Institute
Hee-Young Kang
Korea Atomic Research Institute
Paper No:
PVP2002-1564, pp. 291-297; 7 pages
Published Online:
August 14, 2008
Citation
Koo, K, Ha, K, Park, R, Kim, S, Kim, H, & Kang, H. "Development of Ultrasonic Temperature Sensors for Ultra-High Temperature Measurement in Nuclear Reactor Vessel." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. Computational Technologies for Fluid/Thermal/Structural/Chemical Systems With Industrial Applications, Volume 1. Vancouver, BC, Canada. August 5–9, 2002. pp. 291-297. ASME. https://doi.org/10.1115/PVP2002-1564
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