Measurements of thermal disadvantage factors in light-water moderated PuO2-UO2 and UO2 lattices.
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概要
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The disadvantage factor for thermal neutrons in light-water moderated PuO<SUB>2</SUB>-UO<SUB>2</SUB> and UO<SUB>2</SUB> square lattices were obtained from measurements of thermal neutron density distri-butions in a unit lattice cell, measured with Dy-Al wire detectors. The lattices consisted of 3.4w/0 PuO<SUB>2</SUB>-UO<SUB>2</SUB> and 2.6w/0 UO<SUB>2</SUB> fuel rods, and the water-to-fuel volume ratio within the unit cell was parametrically changed. The PuO<SUB>2</SUB>-UO<SUB>2</SUB> and UO<SUB>2</SUB> fuel rods were designed to realize equal fissile atomic number density.<BR>The disadvantage factors thus measured were 1.36±0.07, 1.37±0.08, 1.40±0.06 and 1.38±0.06 in the PuO<SUB>2</SUB>-UO<SUB>2</SUB> fuel lattices, and 1.30±0.06, 1.31±0.08, 1.30±0.08 and 1.33 ±O.06 in the UO<SUB>2</SUB>, for water-to-fuel volume ratios, of 1.76, 2.00, 2.38 and 2.95, respec-tively. This difference in disadvantage factor between PuO<SUB>2</SUB>-UO<SUB>2</SUB> and UO<SUB>2</SUB> fuel lattices corresponds to about 8%. Calculated results obtained by multigroup transport code LASER agreed well with the measured ones.
- 一般社団法人 日本原子力学会の論文
著者
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Ohno Akio
Japan Atomic Energy Research Institute
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KIKUCHI Saburo
Power Reactor and Nuclear Fuel Development Corp.
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MATSUURA Shojiro
Japan Atomic Energy Research Institute, Tokaimura, Tharaki-ken.
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TSURUTA Harumichi
Japan Atomic Energy Research Institute
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YUMOTO Ryozo
Power Reactor and Nuclear Fuel Development Corp.
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KOBAYASHI Iwao
Japan Atomic Energy Research Institute
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SUZAKI Takenori
Japan Atomic Energy Research Institute
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MURAKAMI Kiyonobu
Japan Atomic Energy Research Institute
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SASAJIMA Hideyoshi
Power Reactor and Nuclear Fuel Development Corporation
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HASHIMOTO Masao
Japan Atomic Energy Research Institute
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KAJIYAMA Takashi
Power Reactor and Nuclear Fuel Development Corp.
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SASAJIMA Hideyoshi
Power Reactor and Nuclear Fuel Development Corp.
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MATSUURA Shojiro
Japan Atomic Energy Research Institute
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