The definition of true crater dimensions by post-shot drilling

LDR 03144cam a2200433Ii 4500
001 101702653
003 MiAaHDL
005 20221205000000.0
006 m d
007 cr bn ---auaua
008 901212s1964 caua b f000 0 eng d
024 8 ⊔ ‡a54029
024 8 ⊔ ‡aWT-1834
035 ⊔ ⊔ ‡a(MiU)990147534170106381
035 ⊔ ⊔ ‡asdr-miu.990147534170106381
035 ⊔ ⊔ ‡z(MiU)MIU01000000000000014753417-goog
035 ⊔ ⊔ ‡a(OCoLC)669762987
035 ⊔ ⊔ ‡z(MiU)Aleph014753417
040 ⊔ ⊔ ‡aNFP ‡beng ‡cNFP ‡dTRAAL
049 ⊔ ⊔ ‡aMAIN
086 0 ⊔ ‡aY 3.At 7:22/WT-1834
100 1 ⊔ ‡aShort, Nicholas M.
245 1 4 ‡aThe definition of true crater dimensions by post-shot drilling / ‡cNicholas M. Short.
264 ⊔ 1 ‡aLivermore, California : ‡bLawrence Radiation Laboratory, University of California, ‡c1964.
300 ⊔ ⊔ ‡a59 pages : ‡billustrations ; ‡c28 cm.
336 ⊔ ⊔ ‡atext ‡btxt ‡2rdacontent
337 ⊔ ⊔ ‡aunmediated ‡bn ‡2rdamedia
338 ⊔ ⊔ ‡avolume ‡bnc ‡2rdacarrier
490 0 ⊔ ‡aWT (Series) ; ‡v1834
500 ⊔ ⊔ ‡aAccession No.: 54029.
500 ⊔ ⊔ ‡aMisc. No.: WT-1834.
500 ⊔ ⊔ ‡a"March 2, 1964."--Title page.
500 ⊔ ⊔ ‡a"Issued 6 July 1964."--Cover.
500 ⊔ ⊔ ‡a"Project Danny Boy Nevada Test Site 5 March 1962, Final Report."
504 ⊔ ⊔ ‡aIncludes bibliographical references (page 56).
520 ⊔ ⊔ ‡aCore samples from all three holes examined thusly over 1-ft intervals revealed these microfractures to occur consistently at points 35-38 ft radially from the shot point. A radius of 36+2 feet is therefore assigned to the explosion cavity. The true crater (cavity) surface is a hemisphere radially symmetrical about the shot point at depths below approximately 110 ft. Fixing this radius relative to calculated cavity expansion curves and to the probable time of venting aids in the understanding of history and mechanisms of cavity growth, from which speculative treatments of the behavior of rock and water vapors in the growing cavity and of a possible origin of vesiculated glass found in the crater throwout rubble have been developed.
520 ⊔ ⊔ ‡aThe Danny Boy event of March 5, 1962, was a nuclear cratering explosion of 0.42-kt yield at a depth of 110 ft in a basalt flow capping Buckboard Mesa in Area 18, Nevada Test Site. In May-June 1962, three slant holes were drilled from the northwest side of the crater lip base into the vicinity of the shot point for purposes of recovering samples for radiochemical yield determination, assessing the fracture state in the inelastic zone, and locating the true crater surface at several points in order to estimate the explosion cavity radius at the time of venting. Percent core recovery data and radiation logs failed to define the fallback-true crater interface nor was any radioactive glass lining the cavity surface found in the cores. Rock in a 2-ft-thick zone immediately beyond this surface was intensely crushed and fractured in a manner readily discernible by a petrographic microscope examination.
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aNuclear explosions.
650 ⊔ 0 ‡aNuclear excavation.
650 ⊔ 0 ‡aBlast effect.
710 2 ⊔ ‡aU.S. Atomic Energy Commission.
730 0 ⊔ ‡aTechnical Report Archive & Image Library (TRAIL)
899 ⊔ ⊔ ‡a39015095073865
CID ⊔ ⊔ ‡a101702653
DAT 0 ⊔ ‡b20221205000000.0
DAT 1 ⊔ ‡a20221206061329.0 ‡b2023-10-05T17:40:56Z
CAT ⊔ ⊔ ‡aSDR-MIU ‡cmiu ‡dALMA ‡lprepare.pl-004-008
FMT ⊔ ⊔ ‡aBK
HOL ⊔ ⊔ ‡0sdr-miu.990147534170106381 ‡aMiU ‡bSDR ‡cGWLA ‡f014753417 ‡pmdp.39015095073865 ‡sMIU ‡1990147534170106381
974 ⊔ ⊔ ‡bMIU ‡cGWLA ‡d20231005 ‡sgoogle ‡umdp.39015095073865 ‡y1964 ‡rpd ‡qbib ‡tUS fed doc