Loading patent…
AssigneeShanghai Nuclear Engineering Research & Design Institute
InventorsJunqiang Lu, Chuntao Tang, Hui Li, Bo Yang, Jiwei Li, Qianxue Ding, Libing Zhu, Jiazheng Liu
Estimating the term…
A gray control rod having a neutron absorber comprising terbium and dysprosium is provided. The neutron absorber comprises at least one first component and at least one second component, the reactivity worth of the first component increases as the service time of the neutron absorber increases, the reactivity worth of the second component decreases as the service time of the neutron absorber increases; the reactivity worth of the neutron absorber varying no more than 15% within the service time of the neutron absorber. By using the first component and the second component to form the neutron absorber, and adjusting the proportion of the respective components in the neutron absorber, the neutron absorber having a substantially planar reactivity worth loss characteristic can be obtained. The gray control rod and the assembly having required reactivity controlling ability can be obtained by increasing or decreasing the material dosage of the neutron absorber.
A neutron absorber of a gray control rod, comprising a first absorber material and a second absorber material, wherein reactivity worth of the first absorber material increases as service time of the neutron absorber increases, and reactivity worth of the second absorber material decreases as the service time of the neutron absorber increases;
A gray control rod, comprising a cylindrical cladding tube, an upper end plug and a lower end plug for sealing two ends of the cladding tube, a neutron absorber being encapsulated in the cladding tube, wherein the neutron absorber comprises a first absorber material and a second absorber material, reactivity worth of the first absorber material increases as service time of the neutron absorber increases, reactivity worth of the second absorber material decreases as the service time of the neutron absorber increases;
A gray control rod assembly, comprising a plurality of gray control rods, each gray control rod comprising a cylindrical cladding tube, an upper end plug and a lower end plug for sealing two ends of the cladding tube, a neutron absorber being encapsulated in the cladding tube, wherein the neutron absorber comprises a first absorber material and a second absorber material, reactivity worth of the first absorber material increases as service time of the neutron absorber increases, reactivity worth of the second absorber material decreases as the service time of the neutron absorber increases;
Dependencies are inferred from the claim text.