Reactor Theory (Nuclear Parameters)DOE-HDBK-1019/2-93REACTIVITY COEFFICIENTSReactivity Coefficients Summary (Cont.)The pressure coefficient of reactivity is the change in reactivity per unit changein pressure.The pressure coefficient of reactivity is usually negligible in reactors moderatedby subcooled liquids because the density of the liquid does not changesignificantly within the operating pressure range.The void coefficient of reactivity is the change in reactivity per unit change invoid volume.The void coefficient of reactivity becomes significant in a reactor in which themoderator is at or near saturated conditions.Rev. 0NP-03Page 29
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