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  Paducah modifies cylinders for DUF6 processing
  A milestone has been reached at the Department of Energy’s Paducah Site when work crews successfully fabricated valves from old equipment and installed them on 137 specialized cylinders. This action will enable future work crews to transform depleted uranium hexafluoride (DUF6) stored inside the cylinders into depleted uranium oxide, a stable chemical form suitable for reuse, storage or disposal.
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The neutron capture cross sections of ²⁴⁰Pu and ²⁴²Pu were measured in the energy range from 50 to 250 keV, using ¹⁹⁷Au as a standard. Neutrons were produced via the T(p,n) reaction with the Karlsruhe 3-MV pulsed Van de Graaff accelerator. Capture events were detected by a Moxon-Rae detector. A flight path as short as 66 mm was used in the measurements to obtain a sufficient signal-to-background ratio. An overall uncertainty of 7 to 11% was obtained for ²⁴⁰Pu and of 10 to 15% for ²⁴²Pu. In the region of overlap between 50 and 90 keV, the presented data agree with our previous results. They confirm the existing data for ²⁴⁰Pu. Discrepancies up to 30% for ²⁴⁰Pu and ²⁴²Pu were found in the evaluated ENDF/B-IV files while KEDAK 3 fits reasonably well to the experimental data.