Document Details


Title:
OPERATION HARDTACK, APRIL-OCTOBER 1958, PROJECT 43.10, TEST RESULTS FROM AUTOMATIC YIELD INDICATORS ( OCTOBER 1960 )
Author(s):
COWAN, M [SANDIA CORPORATION (NOW SANDIA NATIONAL LABORATORIES)]; MUNRO, D N [SANDIA CORPORATION (NOW SANDIA NATIONAL LABORATORIES)]; SANDER, H H [SANDIA CORPORATION (NOW SANDIA NATIONAL LABORATORIES)]
Subject Terms:
HARDTACK I OPERATION; HARDTACK II OPERATION; MEASURING INSTRUMENTS; FISSION YIELD; BUTTERNUT EVENT; FIR EVENT; KOA EVENT; HOLLY EVENT; YELLOWWOOD EVENT; MAGNOLIA EVENT; SOCORRO EVENT; CHAVEZ EVENT; MORA EVENT; LEA EVENT; HAMILTON EVENT; DONA ANA EVENT; RIO ARRIBA EVENT; WRANGELL EVENT; CATRON EVENT; SANFORD EVENT; DE BACA EVENT; DATA; GRAPHS
Addressee:
MEHAS T C
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1961 Aug 15
Declassification Status:
Never classified
Document Pages:
0050
Accession Number:
NV0051229
Document Number(s):
WT1737
Originating Research Org.:
SANDIA CORPORATION (NOW SANDIA NATIONAL LABORATORI
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
AUTOMATIC YIELD INDICATORS WHICH OPERATE ON THE NEGATIVE-PHASE DURATIO ( ) PRINCIPLE HAVE BEEN DEVELOPED. DETAILS OF THEIR CONSTRUCTION AND R ESULTS O( ) FIELD TESTS ON NUCLEAR EVENTS ARE GIVEN. UNDER TEMPERATURE LAPSE CONDITIONS AT THE PACIFIC PROVING GROUNDS, YIE( ) ESTIMATES WER E OBTAINED DURING HARDTACK PHASE I FOR FIVE DETONATIONS AT DIS( ) RANG ING FROM 11 TO 25 MILES. THE GREATEST ERROR IN YIELD WAS OBTAINED AT 2 ( ) MILES WHERE THE RATION OF INDICATED YIELD TO ACTUAL YIELD WAS ABOU T 2.5. FOR LAPSE CONDITION, IT IS ESTIMATED THAT AUTOMATIC YIELD INDIC ATORS WILL NEARLY ALWAYS INDICATE WITHIN A FACTOR OF 2 OR 3 OF THE ACT UAL YIELD WITHIN THE RA( ) TO 0.1 PSI PEAK OVERPRESSURE (ABOUT 30 MILE S FOR 1 MT). UNDER STRONG LOW-LEVEL TEMPERATURE INVERSIONS (RAPID INCR EASE IN TEMPERATURE WITH INCREASE IN HEIGHT ABOVE THE SURFACE) AT NEVA DA TEST SITE, AUTOMA( ) YIELD INDICATORS FUNCTIONED PROPERLY ON 11 SHO TS ON OPERATION HARDTACK, PHASE II. YIELDS RANGED FROM 0.62 ION TO 6.5 KT AND DISTANCES RANGED FROM 2 TO 15 MILES. ON EIGHT OF THESE EVENTS, INDICATED YIELDS WERE WITHIN A FACTOR OF 2( ) OF ACTUAL YIELDS . GREA TER ERRORS ON THE THREE OTHER EVENTS WERE CAUSED BY INTERFERENCE EFFEC TS RESULTING FROM THE INVERSION CONDITIONS. THIS AND OTHER BLAST-WAVE MEASUREMENTS INDICATE THAT FACTOR-OF-2 YIELD ESTIMATES CAN BE OBTAINED BY THE AYI ABOUT 70 PERCENT OF THE TIME UNDER STRONG INVERSION CONDIT IONS WITHIN THE RANGE OF 0.1 PSI. ADDITIONAL ENGINEERING EFFORT IS REQ UIRED TO PRODUCE AN INSTRUMENT WHICH IS RELIABLE AND RUGGED ENOUGH FOR MILITARY FIELD USE.


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