| 主权项 |
1. Control rod configured for at least one of a nuclear power light water boiling water reactor or a nuclear power light water pressurized water reactor, wherein the control rod comprises a casing (4) within which there is at least one space (6), wherein the control rod contains neutron absorber material (8) in said at least one space (6), wherein at least 90%, with respect to weight, of the neutron absorber material (8) that is in said at least one space (6) of said control rod is in the form of hafnium hydride, wherein the ratio between hafnium and hydrogen in said hafnium hydride is HfHx, where 1.40≦x≦1.80, wherein the hafnium hydride in the control rod is in the form of solid bodies (8), wherein said at least one space (6) is configured as an elongated channel with substantially circular cross-section, and wherein said neutron absorber material (8) in the form of hafnium hydride is in the form of one or more solid bodies with substantially circular cross-section, wherein the solid body or each of the solid bodies have a cross-sectional diameter d, and wherein the space has a cross-sectional diameter D where the solid body or each of the solid bodies are positioned, wherein D−d≦0.20 mm. |
