STP850: Equalization of Axial Neutron Flux Density for the Transmutation Doping of Silicon in a Heavy Water Reactor

    Andresen, K
    manager of NTD silicon productionhead of Isotope Divisionstaff member of Reactor Physics Division, Risø National Laboratory, Roskilde,

    Heydorn, K
    manager of NTD silicon productionhead of Isotope Divisionstaff member of Reactor Physics Division, Risø National Laboratory, Roskilde,

    Nonbøl, E
    manager of NTD silicon productionhead of Isotope Divisionstaff member of Reactor Physics Division, Risø National Laboratory, Roskilde,

    Pages: 10    Published: Jan 1984


    Abstract

    New irradiation facilities for the neutron transmutation doping of silicon crystals with a diameter of up to 110 mm have been installed in the Danish heavy-water reactor DR 3. Cross-sectional uniformity is easily achieved by rotation, but axial variation is affected by different reactor operating conditions. A computer program has been developed as an aid in designing a stainless steel absorber that limits the maximum deviation with a minimum reduction of the average neutron fluence. Comprehensive experimental verification has been carried out to ascertain the quality of the NTD silicon within close specifications.

    Keywords:

    neutron transmutation doping, neutron flux equalization, silicon semiconductor materials, doping uniformity, computer modelling


    Paper ID: STP32684S

    Committee/Subcommittee: F01.06

    DOI: 10.1520/STP32684S


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