Document Details


Title:
REPORT TO THE TEST DIRECTOR, BIOLOGICAL EFFECTIVENESS OF IONIZING RADIATION WITHIN SHELTERS
Author(s):
BOND, V P; CARTER, R E; REED, J S; HECHTER, H H; VEENSTRA, R J; CRONKITE, E P [NAVAL MEDICAL RESEARCH INSTITUTE]; CONARD, R A [NAVAL MEDICAL RESEARCH INSTITUTE]; SCHLANG, H A [NAVAL MEDICAL RESEARCH INSTITUTE]; THORPE, W T.S. [NATIONAL INSTITUTE OF HEALTH]; CORSBIE, R L [CIVIL EFFECTS TEST GROUP]
Subject Terms:
UPSHOT OPERATION; BIOLOGICAL EFFECTS; IONIZING RADIATIONS; SHIELDING; RADIATION EFFECTS; UPSHOT-KNOTHOLE OPERATION
Document Location:
Location - DOE/NNSA 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 - NTA@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1953 Mar 31
Declassification Status:
Unknown
Document Pages:
0066
Accession Number:
NV0006288
Document Number(s):
WT793
OpenNet Entry Date:
1994 Aug 26
OpenNet Modified Date:
2003 Sep 18
Description/Abstract:
DIRECT BIOLOGICAL MEASUREMENTS OF THE TOTAL RADIATION HAZARD WITHIN EA RTH-PROTECTED ATOMIC ENERGY COMMISSION COMMUNAL SHELTERS WERE CARRIED OUT IN FIVE SHOTS OF THE UPSHOT-KNOTHOLE SERIES. ANIMALS WERE EXPOSED IN THIN ALUMINUM AND IN LEAD-PROTECTED CONTAINERS IN ORDER TO ESTIMAT E THE NEUTRON CONTRIBUTION TO THE TOTAL BIOLOGICALLY EFFECTIVE DOSE. MICE AND DOGS WERE USED. BIOLOGICAL END POINTS EMPLOYED INCLUDED MORT ALITY, HEMATOLOGY, SPLEEN-THYMUS WEIGHTS, GUT WEIGHTS, AND UPTAKE OF R ADIOACTIVE IRON IN HEMATOPOIETIC TISSUE. SATISFACTORY CORRELATIONS BE TWEEN PHYSICAL MEASUREMENTS OF DOSE AND BIOLOGICAL EFFECT WERE OBTAINE D. THE NEUTRON HAZARD WITHIN SHELTERS HAVING 3 FT 8 INCHES OR MORE OF EARTH OVERLAY WAS NOT APPRECIABLE WITH OUTSIDE SULFUR FLUXES OF 2.4 X 10E11 NEUTRONS/SQ CM OR LESS (A 20-KT WEAPON AT 700 YD), REGARDLESS O F THE INCIDENT ANGLE OF THE BOMB RADIATION. ACCURATE PREDICTIONS FOR GREATER FLUXES OR LESS THICKNESS OF EARTH ARE NOT POSSIBLE FROM THE DA TA. THE CONTRIBUTION OF NEUTRONS TO THE TOTAL BIOLOGICALLY EFFECTIVE DOSE WAS FOUND NOT TO INCREASE OVER THE FREE-AIR SITUATION FOLLOWING T RANSMISSION THROUGH THE EARTH OVERLAY, AND HENCE GAMMA IS THE CONTROLL ING RADIATION HAZARD WITHIN SHELTERS EXPOSED TO LARGE-DIAMETER IMPLOSI ON WEAPONS. ALTHOUGH SIGNIFICANT GAMMA DOSE LEVELS WERE FOUND IN CERT AIN PROTOTYPE SHELTER STRUCTURES, NO STATEMENT OF THE PROBABLE DEGREE OF HAZARD IS WARRANTED BECAUSE OF PROBABLE GAMMA "LEAKS" IN THE STRUCT URES STUDIED.


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