BRANCO containment data report

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Description

The BRANCO event was detonated in hole U2ew of the Nevada Test Site as indicated in figure 1.1. The event HERKIMER was simultaneously detonated at a greater depth in the same hole. The BRANCO device had a depth-of-burial (DOB) of 293 m in the alluvium of area 2, about 250 m above the standing water level and 670 m above the Paleozoic formation. Stemming of the 2.44 m diameter emplacement hole followed the plan is shown, and a log of the stemming operations was maintained. Detonation time was 09:25 PDT on September 21 1983, and 88. 7 minutes later a ... continued below

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34 p.

Creation Information

Stubbs, T. & Heinle, R. March 1, 1996.

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Description

The BRANCO event was detonated in hole U2ew of the Nevada Test Site as indicated in figure 1.1. The event HERKIMER was simultaneously detonated at a greater depth in the same hole. The BRANCO device had a depth-of-burial (DOB) of 293 m in the alluvium of area 2, about 250 m above the standing water level and 670 m above the Paleozoic formation. Stemming of the 2.44 m diameter emplacement hole followed the plan is shown, and a log of the stemming operations was maintained. Detonation time was 09:25 PDT on September 21 1983, and 88. 7 minutes later a surface collapse occurred leaving a crater with mean radius of 55.8 m and maximum depth of 9.7 m. No radiation arrivals were detected above ground and the BRANCO containment was considered successful. A schematic layout of the instrumentation designed to monitor the emplacement procedures and stemming performance of the BRANCO event is provided. The two stemming plugs above the BRANCO event were composed of coal-tar epoxy (LAE 59, denoted CTE). A soft layer of coal-tar and aggregate (LAE 59MY, denoted CTA) was poured on the top of each of the plugs to act as a gas seal. Pressure and radiation were monitored in the loose stemming about 9 m below the top 0016 plug. Experimental data is provided.

Physical Description

34 p.

Notes

OSTI as DE97050160

Source

  • Other Information: PBD: Mar 1996

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  • Other: DE97050160
  • Report No.: UCRL-ID--125019
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/399943 | External Link
  • Office of Scientific & Technical Information Report Number: 399943
  • Archival Resource Key: ark:/67531/metadc676055

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • March 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

Description Last Updated

  • Feb. 23, 2016, 1:08 p.m.

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Stubbs, T. & Heinle, R. BRANCO containment data report, report, March 1, 1996; California. (digital.library.unt.edu/ark:/67531/metadc676055/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.