Document Details
Title:
REQUIREMENTS FOR MILITARY RADIACS 2 EFFECT OF THE OPERATOR ON THE ENERGY-DIRECTIONAL RESPONSE OF PORTABLE RADIATION INSTRUMENTS
Author(s):
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:
1963 Dec 16
Declassification Status:
Never classified
Document Pages:
0060
Accession Number:
NV0016144
Document Number(s):
USNRDLTR701
Originating Research Org.:
UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATOR
OpenNet Entry Date:
1994 Aug 26
OpenNet Modified Date:
2003 Sep 18
Description/Abstract:
THIS REPORT PRESENTS THE RESULTS OF EXPERIMENTS DESIGNED TO DETERMINE THE RESPONSE OF SELECTED MILITARY HIGH-RANGE RADIACS TO EXTENDED GAMMA RADIATION FIELDS WITH AND WITHOUT A PHANTOM (SIMULATED OPERATOR). THE IM-125/PDR-43, IM-153/PD, IM-108A/PD, PDR-63 (USNRDL PROTOTYPE), AND D T-60 (XN-2)/PD WERE TESTED WITH POINT SOURCES OF RADIATION WITH ENERGI ES OF 70, 120, 180 KEV (EFF), 667 KEV (CS-137), AND 1170, 1330 KEV (CO -60) AT RADIATION INTENSITIES IN THE RANGE 1 TO 5 R/HR. ASSUMING THAT RESPONSE OF THESE RADIACS TO EXTENDED-FILED RADIATION SOURCES CAN BE I NFERRED FROM THEIR RESPONSE TO MULTILATERAL POINT SOURCES AT SPECIFIC ANGLES OF ELEVATION AND OVER 360 DEG OF ARC, IT HAS BEEN FOUND THAT RESPONSE TO RADIATION BACK-SCATTERED FROM THE OPERATOR COMPENSATES FOR DECREASE IN RESPONSE DUE TO BODY (OPERATOR"S) ATTENUATION TO AN EXTENT DETERMINED BY TYPE OF RADIAC, CARRYING MODE, AND RADIATION ENERGY. THE PRESENCE OF THE OPERATOR HAS LITTLE EFFECT ON THE RESPONSE OF THE IM-1 25/PDR-43. EXTENDED-FIELD RESPONSE OF THE IM-153/PD, IM-108A/PD, PDR-6 3, AND DT-60 (XN-2)/PD ARE ALL SUBSTANTIALLY DECREASED BY THE PRESENCE OF THE OPERATOR IN VARYING DEGREE, DEPENDENT ON RADIAC TYPE AND RADIA TION ENERGY. USING PRESENT CALIBRATION METHODS, THE NET EFFECT OF THE OPERATOR IS TO CAUSE ALL OF THE RADIACS TESTED, EXCEPT THE DT-60(XN-2) /PD, TO INDICATE ABOUT 0.75 OF THE TRUE FREE-FIELD RADIATION DOSE RATE OR DOSE. WHEN WORN BY AN OPERATOR, THE DT-60(XN-2)/PD INDICATES A BOUT 0.65 OF THE FREE-FIELD DOSE. THESE RESULTS ARE PROBABLY TYPICAL O F PORTABLE RADIATION DETECTION INSTRUMENT RESPONSE TO EXTENDED FISSION PRODUCT FIELDS WHEN HELD BY AN OPERATOR.