HFIR


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HFIR

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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HFIR operates on approximately 25-day cycles, and neutron flux varies during the cycle, increasing ~0.8% per day.
However, although powder metal of oxide targets was routinely used for [sup.188]W production in the ORNL HFIR for many years [12-14], transition to use of the highly enriched [sup.186]W pressed and sintered targeted geometry was originally explored as a strategy to increase the [sup.186]W mass per target [11].
"The neutron science community is eager to utilize these extraordinary capabilities, and we will soon be ready to provide them." HFIR's continuous cold neutron source will rival the reactor at France's Institut Laue-Langevin in Grenoble, generally considered as a world leader in the field, says Nagler.
This latest milestone within the HFIR is part of a $65 million DOE Office of Science-funded renovation of the 40-year-old reactor.
When it becomes operational in early 2005, the new cold source at the High Flux Isotope Reactor (HFIR) will be the most intense cold neutron source in the United States.
We plan to run the experiment first at the HFIR reactor, to measure the polarization-independent parameters a and b, and then at SNS to measure all four parameters.
The cold moderator at HFIR is a square 8.52 cm on a side whose spectrum is shown in Fig.
For a 4 cm wide m = 3.5 bender illuminated by the HFIR spectrum, the optimum simulated [gamma] [congruent to] 9.5 mrad.