Updated flux information for neutron scattering and irradiation facilities at the BNL High Flux Beam Reactor

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The HFBR is a heavy water, D{sub 2}O, cooled and moderated reactor with twenty-eight fuel elements containing a maximum of 9.8 kilograms of {sup 235}U. While most reactors attempt to minimize the escape of neutrons from the core, the HFBR`s D{sub 2}O design allows the thermal neutron flux to peak in the reflector region and maximizes the number of thermal neutrons available to nine horizontal external beams, H-1 to H-9, used for neutron scattering and capture reactions, supporting physics, chemistry and biology experiments. All horizontal beam tubes were built tangential to the direction of the emerging neutrons, except for the ... continued below

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3 p.

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Holden, N. E.; Hu, J. P.; Reciniello, R. N.; Sengupta, S.; Greenwood, L. R. & Farrell, K. August 1997.

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The HFBR is a heavy water, D{sub 2}O, cooled and moderated reactor with twenty-eight fuel elements containing a maximum of 9.8 kilograms of {sup 235}U. While most reactors attempt to minimize the escape of neutrons from the core, the HFBR`s D{sub 2}O design allows the thermal neutron flux to peak in the reflector region and maximizes the number of thermal neutrons available to nine horizontal external beams, H-1 to H-9, used for neutron scattering and capture reactions, supporting physics, chemistry and biology experiments. All horizontal beam tubes were built tangential to the direction of the emerging neutrons, except for the H-2 beam tube, which looks directly at the core and has been used for neutron cross section measurements utilizing fast neutrons and for the TRISTAN fission product studies. In recent years, there have been some beam modifications and new instrumentation introduced at the HFBR. A high resolution neutron powder diffractometer instrument is now operating with a resolution of 5 {times} 10{sup {minus}4} at horizontal beam line H-1. To study scattering from liquid surfaces, a neutron reflection spectrometer was introduced on the CNF beam line at H-9. In the past year, a fourth beam line has been added to the CNF line at H-9. The existing beam plug at the H-6 beam line has recently been removed and a new plug, which will feature super mirrored surfaces, is now being installed. Last year, the vertical beam thimble, V-13, a fixed port filled with thirty year old samples used for HFBR material surveillance studies was replaced by a new thimble and charging station at the core edge creating an irradiation facility to substitute for the original V-13. A neutron dosimetry program has begun to measure and calculate the energy dependent neutron and gamma ray flux densities and/or dose rates at horizontal beam lines and vertical irradiation thimbles.

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3 p.

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INIS; OSTI as DE97007333

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  • International conference on nuclear data for science and technology, Trieste (Italy), 20-24 May 1997

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  • Other: DE97007333
  • Report No.: BNL--64440
  • Report No.: CONF-970512--8
  • Grant Number: AC02-76CH00016;AC05-96OR22464;AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 521648
  • Archival Resource Key: ark:/67531/metadc697097

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 6, 2016, 2:39 p.m.

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Holden, N. E.; Hu, J. P.; Reciniello, R. N.; Sengupta, S.; Greenwood, L. R. & Farrell, K. Updated flux information for neutron scattering and irradiation facilities at the BNL High Flux Beam Reactor, article, August 1997; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc697097/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.