Document Details


Title:
OPERATION HARDTACK, PROJECTS 8.7/2.12D, THERMAL RADIATION FROM VERY-LOW-YIELD BURSTS, APRIL - OCTOBER 1958 ( HARDTACK-I OPERATION ) (DELETED)
Author(s):
MAHONEY, J J [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; MALONEY, J C [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; FURROW, S D [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; KILMINSTER, D T [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; ALVARES, N J [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; DAHLSTROM, T S [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; ULBERG, J C [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]
Subject Terms:
HARDTACK II OPERATION; HAMILTON EVENT; THERMAL RADIATION; EQUIPMENT; MEASURING METHODS; RADIATION FLUX
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:
1960 Jun 10
Declassification Status:
Sanitized
Document Pages:
0032
Accession Number:
NV0051380
Document Number(s):
WT1676EX
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE OBJECTIVES OF PROJECT 8.7 WERE TO DETERMINE THE THERMAL RADIANT EX POSURE ( CAL/CM-2 ) VERSUS DISTANCE FROM GROUND ZERO FOR A FRACTINAL-K ILOTON NUCLEAR DEVICE AND THE TOTAL LUMINOUS FLUX ( LUMENS/FT-2 ) AS A FUNCTION OF BOTH TIME AND DISTANCE FROM GROUND ZERO. THE LUMINOUS FLUX WAS SUFFICIENTLY HIGH TO SATURATE THE ILLUMINATION SENSOR SYSTEM, THE REFORE NO PEAK LUMINOUS FLUX INFORMATION WAS RECORDED. THE MEASURED VA LUES FOR THERMAL RADIATION AGREE WITH THE ESTABLISHED SCALING LAWS FOR A SURFACE DETONATION. THE OBJECTIVES OF PROJECT 2.12D AT SHOT HAMILTO N WERE TO DETERMINE THE THERMAL RADIANT EXPOSURE VERSUS DISTANCE FOR A FRACTIONAL-KILOTON DETONATION, AND TO COMPARE THE EXPERIMENTALLY OBTA INED RADIANT-EXPOSURE VALUES WITH THOSE CALCULATED FROM EXISTING SCALI NG LAWS. SHOT HAMILTON WAS DETONATED ON A 50-FOOT-HIGH WOODEN TOWER. R ADIANT EXPOSURES FOR SHOT HAMILTON WERE MEASURED AT HORIZONTAL DISTANC ES OF 175 TO 700 FEET FROM GROUND ZERO USING THERMISTOR CALORIMETERS. THE EQUIPMENT OPERATED SATISFACTORILY IN THAT ONLY TWO INSTRUMENTS FAI LED OUT OF A TOTAL OF SIXTEEN INDEPENDENT INSTRUMENTS AND RECORDERS. H OWEVER, THE RESULTS WERE, IN GENERAL, INCONCLUSIVE BECAUSE OF THE VERY -LOW YIELD OF THE DEVICE AND ALSO PERHAPS BECAUSE SHIELDING MATERIAL I N THE BOMB TOWER PARTIALLY OBSCURED THE THERMAL LINE OF SIGHT. ALL EXC EPT ONE STATION REGISTERED LESS THAN 1 CAL/CURIUM-2 WHICH WAS ABOUT TH E LOWEST LIMIT OF DETECTION OF THE CALORIMETERS.


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