Many changes were made in the recent upgrade of the experimental fast reactor JOYO to the MK-III design. The core changes which made to achieve a fourfold increase in irradiation capacity are the introduction of a second enrichment zone, an increase in core radius and a smaller decrease in core height. Performance tests done at low power, which focus on the neutronics characteristics, are presented. These tests include nuclear instrumentation system response, the approach to criticality and excess reactivity evaluation, control rod calibrations performed several ways, and isothermal temperature coefficient evaluation. The measurements are emphasized but comparisons with calculated predictions are included. The design predictions are consistent with the performance test results, and all technical safety specifications are satisfied. The JOYO MK-III core will provide enhanced irradiation testing capability, as well as serving as a test bed for improving fast reactor operation, performance and safety.
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12th International Conference on Nuclear Engineering
April 25–29, 2004
Arlington, Virginia, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4688-1
PROCEEDINGS PAPER
Core Performance Tests at Low Power for the JOYO Upgrade to MK-III Available to Purchase
Takafumi Aoyama,
Takafumi Aoyama
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
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Robert W. Schaefer,
Robert W. Schaefer
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
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Shigetaka Maeda,
Shigetaka Maeda
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
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Takashi Sekine
Takashi Sekine
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
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Takafumi Aoyama
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
Robert W. Schaefer
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
Shigetaka Maeda
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
Takashi Sekine
Japan Nuclear Cycle Development Institute, O-arai, Ibaraki, Japan
Paper No:
ICONE12-49188, pp. 67-77; 11 pages
Published Online:
November 17, 2008
Citation
Aoyama, T, Schaefer, RW, Maeda, S, & Sekine, T. "Core Performance Tests at Low Power for the JOYO Upgrade to MK-III." Proceedings of the 12th International Conference on Nuclear Engineering. 12th International Conference on Nuclear Engineering, Volume 2. Arlington, Virginia, USA. April 25–29, 2004. pp. 67-77. ASME. https://doi.org/10.1115/ICONE12-49188
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