Preliminary evaluation of US Army radiac detector DT-236/PD and radiac computer-indicator CP-696/UD. Technical report

Technical Report · Tue Jul 01 04:00:00 EDT 1986

OSTI ID:7191493

Zeman, G H; Dooley, M; Mohaupt, T M

Performance of the DT-236/PD and CP-696/UD dosimetry system was studied in preliminary tests at AFRRI in cobalt-60 and in TRIGA-reactor radiation fields. The test results are relevant to the reproducibility of the dosimeter reader, the variability of readings among identically irradiated of dosimeter response in the AFFRI radiation fields. The performance specifications for this system list + or - 40% accuracy at doses of 50-1000 rads and + or - 20-rad accuracy at 0-50 rads. The present tests showed the system to be capable of meeting these specifications and, with care, a level of accuracy of + or - 10% to 20% was achieved at high doses. At low doses, the accuracy of the system was limited by the + or - 20-rad (2 SD) variability in readings of nonirradiated dosimeters. Factors found to improve the precision of dosimeter readings were (a) warm-up time of several hours for the reader unit, (b) sustained firm pressure on the mechanical switch that initiates the read cycle, (c) triplicate readings sustained firm pressure on the mechanical switch that initiates the read cycle, (d) triplicate readings of each dosimeter, (e) digital readout of the dose values, (f) proper accounting of dosimer predose readings, and (g) waiting 2 hours after irradiation before reading the dosimeter.

• Research Organization: Armed Forces Radiobiology Research Inst., Bethesda, MD (USA)
• OSTI ID: 7191493
• Report Number(s): AD-A-172290/9/XAB; AFRRI-TR-86-2
• Country of Publication: United States
• Language: English

Related Subjects

440102* -- Radiation Instrumentation-- Radiation Dosemeters
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCURACY
DOSEMETERS
DOSIMETRY
ELECTROMAGNETIC RADIATION
HEATING
IRRADIATION
MEASURING INSTRUMENTS
PERFORMANCE
RADIATIONS
THERMAL RADIATION