Order number page 25 940406-171827-13 -001-001 set 5 with 1QFRICPAEUSE ONLY 150. 110. 70. 710. 371. rat Item 43 REPORT NUMBER NRDL-TR--719 PRIMARY TITLE (M) Estimates of radiation geometry and energy responses for the USNRDL Model 1954-56 Gamma-Intensity-Time Recorder PERSONAL AUTHOR (M) Rinnert, H.R. CORPORATE SOURCE PUB. (USA) DATE (YYMMDD) (GITR) Naval Radiological Defense Lab., San Francisco, CA 640122 34. CLASSIF. LEVEL TEXT Unclassified 950. ABSTRACT Estimates of instrumentation response to gamma radiation having various energy spectra and source geometries are presented for the Gamma-Intensity-Time Recorder 801. KEYWORD (S) (GITR) that was used to obtain radiation data at Operations Castle, Wigwam, and Redwing. The GITR’s responses to gamma radiation were estimated for several idealized source geometries and a variety of calculated gamma energy spectra as a function of time. The estimated response values are presented as fractions of each detector’s calibration response to Co{sup 60} radiation beamed at the side of that detector when separated from its four-detector installation. The estimated values of GITR response to radiological environments likely to be encountered in the field did not appear to depend significantly upon time after fission nor upon exact knowledge about energy spectra or source geometries. However, it was estimated that the technique used to calibrate the GITR’s resulted in slightly biased data; i.e., the calibrated doses or dose rates were estimated to be between 10 and 20% too low. 8 references. GAMMA DETECTION/;CASTLE/instrumentation ; WIGWAM/instrumentation ;REDWING/instrumentation ; RADIATION DETECTORS/;CASTLE;WIGWAM; REDWING; COBALT RESPONSE FUNCTIONS ; CALIBRATION Item 150. 110. 44 REPORT NUMBER PRIMARY TITLE (M) WES-TR--2-590 Design and analysis of underground reinforced-concrete arches 70. PERSONAL AUTHOR (M) 710. CORPORATE SOURCE CLASSIF. 950. ABSTRACT LEVEL TEXT 50033949 ; Flathau, W.d.; Sager, R.A.; Luzi, F.&. Army Engineer Waterways Experiment Station, Vicksburg, 371. PUB. DATE (YYMMDD) 34. 60; MS 620100 (USA) Unclassified Comparisons were made of six loading methods used to predict the ground-surface air~-overpressure from CFFICIAL USE ONLY