Measurements for the JASPER Program Axial Shield Re-measurement Experiment

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Description

With one modification, this series of measurements is a repeat of several of the mockups that were investigated during the Axial Shield Experiment performed earlier for the Japanese-American Shielding Program for Experimental Research (JASPER) program at the Tower Shielding Facility (TSF). For these re-runs, slabs of lithiated paraffin, 10.16 cm thick and 152.4 cm on an edge, were placed between the spectrum modifier and the axial shield and directly behind the axial shield. Each of the slabs contained a void area that corresponded in dimension and location,to the surface area of the seven hexagons in the axial shield plus the ... continued below

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72 p.

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Muckenthaler, F.J.; Spencer, R.R.; Hunter, H.T.; Hull, J.L. & Shono, A. March 1, 1993.

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Description

With one modification, this series of measurements is a repeat of several of the mockups that were investigated during the Axial Shield Experiment performed earlier for the Japanese-American Shielding Program for Experimental Research (JASPER) program at the Tower Shielding Facility (TSF). For these re-runs, slabs of lithiated paraffin, 10.16 cm thick and 152.4 cm on an edge, were placed between the spectrum modifier and the axial shield and directly behind the axial shield. Each of the slabs contained a void area that corresponded in dimension and location,to the surface area of the seven hexagons in the axial shield plus the boron carbide (B{sub 4}C) collar that surrounded them. The lithiated paraffin was made part of the mockup to reduce the neutron contributions to the detector from those neutrons passing through the concrete surrounding the hexagon assemblies. The slabs were present in all of the mockups except one, for which the lithiated paraffin following the axial shield was removed. Spectral and integral flux measurements were made behind the axial shield for six B{sub 4}C homogeneous-type assembly containing: (1) the B{sub 4}C rod bundle assembly; (2) the B{sub 4}C central blockage type; (4) the B{sub 4}C central sodium type; and (4) another B{sub 4}C homogeneous-type assembly. The neutron source was the Tower Shielding Reactor II (TSR-II) modified to give a flux typical of that incident on the axial shielding in a Liquid Metal Reactor (LMR).

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72 p.

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OSTI as DE97003411

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  • Other Information: PBD: Mar 1993

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  • Other: DE97003411
  • Report No.: ORNL/TM--12276
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/432822 | External Link
  • Office of Scientific & Technical Information Report Number: 432822
  • Archival Resource Key: ark:/67531/metadc675480

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Office of Scientific & Technical Information Technical Reports

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  • March 1, 1993

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 16, 2016, 4:56 p.m.

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Muckenthaler, F.J.; Spencer, R.R.; Hunter, H.T.; Hull, J.L. & Shono, A. Measurements for the JASPER Program Axial Shield Re-measurement Experiment, report, March 1, 1993; Tennessee. (digital.library.unt.edu/ark:/67531/metadc675480/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.