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  Southern Nuclear applies for SLR for Hatch
  The owners of the two-unit Hatch nuclear power plant are hoping to operate the facility for up to 80 years. Southern Nuclear submitted its application this month to the Nuclear Regulatory Commission for a subsequent license renewal for the dual-unit plant in Baxley, Ga.
  The SLR seeks to extend the operating licenses of both boiling water reactors at Hatch from 60 to 80 years. The NRC approved the plant’s first 20-year license renewal in January 2002, which extended Unit 1’s license through August 6, 2034, and Unit 2’s through June 13, 2038.
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A correlation technique has been developed to make the accuracy of complex and long-running resonance treatments available in fast, routine calculations. The technique is based on the subgroup method and is used to generate group-averaged resonance reaction rates. By fitting the correlation to several detailed auxiliary resonance calculations, a set of weights (the Lebesgue measure) is obtained. The weights can then be applied to a wider range of new cases. Use of the correlation technique results in one-tenth the computational burden of the detailed resonance treatment, yet the results duplicate the detailed calculations to within 0.01% in k_eff.