void coefficient of reactivityとは 意味・読み方・使い方

To provide a fuel assembly that suppresses an increase in change rate of reactivity during state change between high temperature and low temperature, and increases the negative void reactivity coefficient.例文帳に追加

高温−冷温の状態変化時における反応度変化率の増大を抑制でき、負のボイド反応度係数を増大することができる燃料集合体を提供する。 - 特許庁

To prevent a void reactivity coefficient from becoming positive, when acquiring a high converter by improving the core of a BWR (boiling water reactor) in operation at present.例文帳に追加

現在運転中のBWRの炉心を改良して高転換炉とするにあたり、ボイド反応度係数が正になるのを抑制したい。 - 特許庁

To provide a fuel assembly having desirable characteristics as a high burnup fuel by improving nuclear characteristics such as a void reactivity coefficient, high temperature-cold temperature reactivity and control rod reactivity value while realizing manufacturing cost reduction by reducing the kinds of enrichment, the reactivity increase of the fuel in high burnup and the decrease of an output peaking coefficient.例文帳に追加

濃縮度種類低減による製造コスト低減と、高燃焼度時の燃料の反応度増加、出力ピーキング係数の低減を実現するとともに、これと同時に、ボイド反応度係数、高温−冷温反応度、制御棒反応度価値などの核特性を改善でき、高燃焼度燃料として好ましい特性を持った燃料集合体を得ること。 - 特許庁

To prevent the increase of absolute value of void reactivity coefficient and reduction of neutron absorption effect of flammable poison and average axial power distribution by suppressing the increase of reactivity loss and the local power peaking of fuel rods adjacent to short size fuel rods and 4 corners position fuel rods for raising burnup.例文帳に追加

高燃焼度化を図る際、反応度損失や短尺燃料棒隣接燃料棒・４隅位置燃料棒の局所出力ピーキング増大を抑制しつつ、ボイド反応度係数の絶対値の増大や可燃性毒物の中性子吸収効果減少を防止し、軸方向出力分布を平均化する。 - 特許庁

To soften the neutron spectrum by increasing the volume ratio of moderator without decreasing the fuel volume ratio, and to improve the safety of the core by improving the sodium void reactivity and Doppler coefficient.例文帳に追加

燃料体積比を減少させることなく減速材の体積比を増大させることにより、中性子スペクトルを軟化させ、ナトリウムボイド反応度およびドップラ係数を改善することによる炉心の安全性を向上させる。 - 特許庁

To provide a fuel assembly for boiling water type atomic reactors, in which the void coefficient becomes a proper value and the adjustment of reactivity can be realized in a proper flammable poison amount in a reactor core having high burnup and continuously operating for a long term.例文帳に追加

高燃焼度、長期連続運転の炉心において、ボイド係数が適切な値になりかつ反応度調整を適切な可燃性毒物量で実現できる沸騰水型原子炉用燃料集合体を得る。 - 特許庁

As steam stagnates in the water excluding vessel 5 in normal operation and excludes cooling water, neutron leak from the water excluding vessel 5 is enhanced during increasing of void coefficient in the region outside the water excluding vessel 5, which maintains the pressure in the water excluding vessel 5 equal to the reactor pressure, and reactivity variation during power rising is suppressed.例文帳に追加

定格時には水排除容器５内に蒸気が溜まり、冷却水を排除し、水排除容器５外の領域のボイド率増大時に水排除容器５内から中性子漏れが助長され、同時に水排除容器５内を炉圧と等しく保ち、出力上昇時の反応度変化を抑制できる。 - 特許庁