power reactivity coefficientとは 意味・読み方・使い方

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

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