NIF target area design support. Final summary report

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SRI International continued support work for the National Ignition Facility, Chamber Dynamics Group at Lawrence Livermore National Laboratory (LLNL). The work entailed computational modeling of shrapnel and debris generation from copper shine shields, hohlraum, and stainless steel cryogenic support tubes for 1.8 MJ and 1.0 MJ no-yield and 20 MJ yield shots. Also, the authors addressed the effects of shrapnel at the first wall. Computations for 1.8 MJ showed an ionized gold hohlraum, but about half solid and half ionized copper shine shields, when material cell phase boundaries were maintained. This debris generation represents a potential threat to the first ... continued below

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145 p.

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Tokheim, R.E.; Seaman, L. & Curran, D.R. February 1, 1996.

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Description

SRI International continued support work for the National Ignition Facility, Chamber Dynamics Group at Lawrence Livermore National Laboratory (LLNL). The work entailed computational modeling of shrapnel and debris generation from copper shine shields, hohlraum, and stainless steel cryogenic support tubes for 1.8 MJ and 1.0 MJ no-yield and 20 MJ yield shots. Also, the authors addressed the effects of shrapnel at the first wall. Computations for 1.8 MJ showed an ionized gold hohlraum, but about half solid and half ionized copper shine shields, when material cell phase boundaries were maintained. This debris generation represents a potential threat to the first wall and debris shields. Further work is required to translate these results into particle size distributions based on computed strain rates. The authors used simple algorithms for x-ray loading of frost layers protecting the target support to compute peak stress attenuation. They developed algorithmic formulas for predicting damage in candidate first wall materials and they found damage algorithms for fused-silica debris shield material. They obtained very preliminary computational results at 20 MJ for predicting shrapnel mass and particle density at the first wall in spherical polar coordinate space with the hohlraum axis as the polar direction.

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145 p.

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INIS; OSTI as DE96012243

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  • Other Information: PBD: Feb 1996

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  • Other: DE96012243
  • Report No.: UCRL-CR--124257
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/251387 | External Link
  • Office of Scientific & Technical Information Report Number: 251387
  • Archival Resource Key: ark:/67531/metadc671567

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Office of Scientific & Technical Information Technical Reports

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

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Nov. 24, 2015, 5:35 p.m.

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Tokheim, R.E.; Seaman, L. & Curran, D.R. NIF target area design support. Final summary report, report, February 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc671567/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.