Document Details


Title:
OPERATION SUN BEAM, SHOT SMALL BOY, PROJECT OFFICERS REPORT-PROJECT 2.14, SHIELDING EFFECTIVENESS OF COMPARTMENTED STRUCTURES IN A FALLOUT FIELD ( U )
Subject Terms:
SHIELDING; DOMINIC II OPERATION; SMALL BOY EVENT; GAMMA DOSIMETRY; RESEARCH PROGRAMS; MEASURING METHODS; DATA; RADIATION DOSES; GRAPHS
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:
1963 Apr 29
Declassification Status:
Unknown
Document Pages:
0088
Accession Number:
NV0051262
Document Number(s):
WT2220
Originating Research Org.:
UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATOR
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE OBJECTIVES OF PROJECT 2.14 WERE: (1) TO MEASURE THE PENETRATION OF FALLOUT GAMMA RADIATION INTO SIX COMPARTMENTED STEEL STRUCTURES, AND (2) TO DETERMINE THE FREE-FIELD RADIATION CHARACTERISTICS OF THE FALLO UT FIELD. IONIZATION CHAMBERS AND FILM PACKETS WERE PLACED INSIDE STEE L COMPARTMENTS, WHICH WERE THEN STACKED TO FORM SIX CUBIC STRUCTURES M EASURING THREE COMPARTMENTS ALONG EACH DIMENSION. EACH STRUCTURE CONTA INED 27 COMPARTMENTS. THE WALL THICKNESS OF EACH STRUCTURE WAS UNIFORM . THICKNESSES RANGED FROM 1/4 TO 1 1/2 INCHES. DOSE MEASUREMENTS WERE MADE BOTH INSIDE AND ON THE OUTSIDE SURFACES OF THE STRUCTURES DURING VARIOUS PERIODS FROM H+74 TO H+262 HOURS. ADDITIONAL MEASUREMENTS WERE MADE WITH PHOTOGRAPHIC FILM WITHIN STEEL SLABS OF THICKNESS TO MATCH THOSE OF THE COMPARTMENTED STRUCTURES. COMPARISON OF MEASUREMENTS WITH IN THE SLABS WITH THOSE WITHIN THE COMPARTMENTED STRUCTURES GAVE A DIR ECT INDICATION OF EXTRA DOSE ATTENUATION PRODUCED BY COMPARTMENTALIZAT ION. THE FREE-FIELD RADIATION CHARACTERISTICS OF THE FALLOUT FIELD WER E DETERMINED BY THREE DIFFERENT MEANS: (1) A SURVEY METER TO DETERMINE THE DOSE RATE AT 49 EQUALLY SPACED STATIONS IN A SQUARE ARRAY, 600 FE ET ON A SIDE, AROUND THE COMPARTMENTED STRUCTURES, (2) A TRUCK EQUIPPE D WITH A SCINTILLATION SPECTROMETER FOR SCANNING THE GROUND AND MEASUR ING PULSE-HEIGHT SPECTRA AT VARIOUS AZIMUTHAL AND VERTICAL ANGLES, AND (3) DOSE MEASUREMENTS TAKEN AT DIFFERENT HEIGHTS ABOVE THE TERRAIN UP TO 45 FEET.


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