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Effect of energy dependence on the evaluations of albedo neutron dosimeters

Description: Albedo neutron dosimeters have proven to be effective as a method of measuring the dose from low-energy neutrons that other types of personnel neutron dosimeters do not detect. Many albedo neutron dosimeters have been designed, and some are being used extensively. All albedo neutron dosimeters are energy- dependent, becoming less sensitive as the energy of the neutrons is increased. In this paper the energy dependence and the effect it has on the evaluation of the dose are discussed. Numerous m… more
Date: November 21, 1975
Creator: Hankins, D.E.
Partner: UNT Libraries Government Documents Department
open access

Ambient environmental radiation monitoring at the Lawrence Livermore Laboratory

Description: Thermoluminescence dosimetry is the principal means of measuring ambient $gamma$ radiation at the Lawrence Livermore Laboratory. These dosimeters are used at 12 perimeter locations and 41 locations in the off-site vicinity of the Laboratory, and are exchanged quarterly. Control dosimeters are stored in a 75- mm-thick lead shield located out-of-doors to duplicate temperature cycling of field dosimeters. Effect of dosimeter response to radiation in the shield is determined each quarter. Calibrati… more
Date: November 21, 1975
Creator: Lindeken, C.L.; White, J.H.; Toy, A.J. & Sundbeck, C.W.
Partner: UNT Libraries Government Documents Department
open access

Simplified scheme or radioactive plume calculations

Description: A simplified mathematical scheme to estimate external whole-body $gamma$ radiation exposure rates from gaseous radioactive plumes was developed for the Rio Blanco Gas Field Nuclear Stimulation Experiment. The method enables one to calculate swiftly, in the field, downwind exposure rates knowing the meteorological conditions and $gamma$ radiation exposure rates measured by detectors positioned near the plume source. The method is straightforward and easy to use under field conditions without the… more
Date: November 21, 1976
Creator: Gibson, T. A. & Montan, D. N.
Partner: UNT Libraries Government Documents Department
open access

Comparison of gamma-ray exposure rate measurements at Bikini Atoll

Description: A radiological survey of Bikini and Eneu Islands of the Bikini Atoll was conducted during June 1975 to assess the potential radiation doses that may be received by the returning Bikinians. Bikini Atoll was one of the U.S. nuclear weapons testing sites in the Pacific. An integral part of the survey included measurements of the gamma-ray exposure rates at 1 m above the ground with portable NaI instruments at nearly 2700 locations on the two islands. For comparison purposes, similar measurements w… more
Date: November 21, 1975
Creator: Gudiksen, Paul H. & Crites, Thomas R.
Partner: UNT Libraries Government Documents Department
open access

Public Workshop, Staff Technical Meeting with Applicant on Geysers Unit 17

Description: The overall purpose of this meeting is to discuss the report that was sent to PG and E on February 1st discussing Geysers 17. The Commission has reviewed all of the existing data, the majority of the existing data that have gone through both Lake County and through the CPUC regarding 17, looked at the existing data to see what, if any, additional would be required to file and expeditiously process a Notice of Intention on Geysers Unit 17.
Date: February 21, 1978
Creator: Schiller, Wendy E.
Partner: UNT Libraries Government Documents Department
open access

Rare earths and ion exchange

Description: No Description Available.
Date: March 21, 1974
Creator: Sisson, D. H. & Mode, V. A.
Partner: UNT Libraries Government Documents Department
open access

Nuclear desalination plant control studies

Description: No Description Available.
Date: March 21, 1973
Creator: Ball, S. J.; Clapp, N. E., Jr. & Delene, J. G.
Partner: UNT Libraries Government Documents Department
open access

High resolution x-ray crystal spectrographs

Description: Observation of x-ray line emissions are valuable for determining the thermodynamic state of the emitting plasma. For laser produced plasmas, diffraction crystals can be used to isolate x-ray monochromes to obtain high resolution spectral measurements. We will describe a versatile multi-crystal high resolution spectrograph used for photon energies from 0.5 to 6 keV. We will discuss a calculational package that tunes the response and sensitivity of the instrument and estimates the effect of sourc… more
Date: October 21, 1977
Creator: Koppel, L. N. & Eckels, J. D.
Partner: UNT Libraries Government Documents Department
open access

Fundamental study of crack initiation and propagation. [Computer model of ductile fracture]

Description: Objective is to determine the fracture toughness of A533B-1 steel by computer modeling Charpy V-notch tests. A computer model of ductile fracture was developed that predicts fracture initiation. The model contains a set of material-dependent parameters obtained by computer simulations of small specimen tests. The computer calculations give detailed stress and strain histories up to the time of fracture, which are used to determine the model parameter values. The calibrated fracture model, that … more
Date: December 21, 1977
Creator: Norris, D.M. Jr.; Reaugh, J.E.; Moran, B.; Quinones, D.F. & Wilkins, M.L.
Partner: UNT Libraries Government Documents Department
open access

Determination of performance criteria for high-level solidified nuclear waste from the commercial nuclear fuel cycle: a probabilistic safety analysis

Description: To minimize the radiological risk from the operation of a waste management system for the safe disposal of high-level waste, performance characteristics of the solidified waste form must be specified. The minimum waste form characteristics that must be specified are the radionuclide volatilization fraction, airborne particulate dispersion fraction, and the aqueous dissolution characteristics. The results indicate that the pre-emplacement environs are more limiting in establishing the waste form… more
Date: March 21, 1978
Creator: Heckman, R.A.
Partner: UNT Libraries Government Documents Department
open access

Crystal spectograph for imaging high-density targets

Description: Laser fusion targets are being designed to achieve 100 times liquid hydrogen density using the LLL Argus laser. One method proposed for diagnosing the high density is to seed the D,T fuel with Ar gas and measure the spatial extent of the region emitting the Ar x-rays. A crystal spectrograph has been built to image in 1-D the hydrogen like (3.32 keV) and helium like (3.14 keV) Ar x-rays. The spectrograph was calibrated using an 8 ..mu..m source of Ag L/sub ..beta../ x-rays (3.15 keV) from an x-r… more
Date: October 21, 1977
Creator: Slivinsky, Vincent W.; Leipelt, George R. & Eckels, J. Del
Partner: UNT Libraries Government Documents Department
open access

2660 A holographic interferometry of laser produced plasmas from tilted disk targets

Description: Using double exposure holographic interferometry, an investigation has been made of the Nd laser produced plasmas surrounding disk targets irradiated at different angles of incidence. Measurements have produced a detailed description of the plasma profile necessary for realistic simulations of resonance absorption. A 2660A 15 psec probe pulse is produced by frequency quadrupling a fraction of the main Nd laser pulse from the Janus laser. F/1 and f/10 lenses were utilized to irradiate the target… more
Date: October 21, 1977
Creator: Auerbach, J.M.; Attwood, D.T.; Lee, P.H.Y. & Sweeney, D.W.
Partner: UNT Libraries Government Documents Department
open access

Absolute instrumental neutron activation analysis at Lawrence Livermore Laboratory

Description: The Environmental Science Division at Lawrence Livermore Laboratory has in use a system of absolute Instrumental Neutron Activation Analysis (INAA). Basically, absolute INAA is dependent upon the absolute measurement of the disintegration rates of the nuclides produced by neutron capture. From such disintegration rate data, the amount of the target element present in the irradiated sample is calculated by dividing the observed disintegration rate for each nuclide by the expected value for the d… more
Date: December 21, 1977
Creator: Heft, R.E.
Partner: UNT Libraries Government Documents Department
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