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505 Matching Results

Start Over Year 1982 Day 11th Language English

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Results: 1 - 24 of 505 next

(open access)

Low-exposure tritium radiotoxicity in mammals

Studies of tritium radiotoxicity involving chronic /sup 3/H0H exposures in mammals demonstrate in both mice and monkeys that biological effects can be measured following remarkably low levels of exposure - levels in the range of serious practical interest to radiation protection. These studies demonstrate also that deleterious effects of /sup 3/H beta radiation do not differ significantly from those of gamma radiation at high exposures. In contrast, however, at low exposures tritium is significantly more effective than gamma rays, rad for rad, by a factor approaching 3. This is important for hazard evaluation and radiation protection because knowledge concerning biological effects of chronic low-level radiation exposure has come mainly from gamma-ray data; and predictions based on gamma-ray data will underestimate tritium effects - especially at low exposures - unless the RBE is fully taken into account.

Date: February 11, 1982

Creator: Dobson, R.L.

Object Type: Article

System: The UNT Digital Library

(open access)

Environmental monitoring at the Lawrence Livermore National Laboratory. 1981 annual report

This report gives methods and results of the 1981 radiation monitoring program at LLL for both radioactive and non-radioactive contamination from gaseous and liquid effluents. Off-site monitoring includes various radionuclides but especially tritium in the ecosystems. (PSB)

Date: March 11, 1982

Creator: Auyong, M.; Griggs, K.S. & Buddemeier, R.W.

Object Type: Report

System: The UNT Digital Library

(open access)

Final report for hydrologic studies support: INTERCOMP code conversion

Mass and energy balance errors noted in a number of IBM-executed problems are caused by the lack of precision in computing total mass and energy values for a domain. This problem is evident in domains constructed with highly variable mesh sizes during the early time of simulation. The machine round-off was corrected by double-precisioning certain calculations for mass and energy balance. Small differences that exist between the improved INTERCOMP code operating on an IBM machine and the old version on a CDC machine seem unimportant. The noted differences are greatest at an onset of physical system perturbation. These differences diminish rapidly with each succeeding time step. Comparisons with numerical and analytical solutions appear to prove authenticity of code results. Numerical comparisons with the CCC computer code on the Mobile experiment data demonstrate the advantage of using aquifer influence functions in place of an infinitely large mesh. The one-dimensional heat transfer in the overburden and underburden appears sufficiently accurate to describe aquifer heat losses.

Date: January 11, 1982

Creator: Ichimura, V.

Object Type: Report

System: The UNT Digital Library

(open access)

Framework for Analyzing Safeguards Alarms and Response Decisions

This paper describes a quantitative approach to help evaluate and respond to safeguards alarms. These alrms may be generated internally by a facility's safeguards systems or externally by individuals claiming to possess stolen Special Nuclear Material (SNM). This approach can be used to identify the most likely cause of an alarm - theft, hoax, or error - and to evaluate alternative responses to alarms. Possible responses include conducting investigations, initiating measures to recover stolen SNM, and replying to external threats. Based on the results of each alarm investigation step, the evaluation revises the likelihoods of possible causes of an alarm, and uses this information to determine the optimal sequence of further responses. The choice of an optimal sequence of responses takes into consideration the costs and benefits of successful thefts or hoaxes. These results provide an analytical basis for setting priorities and developing contingency plans for responding to safeguards alarms.

Date: June 11, 1982

Creator: Al-Ayat, R. A.; Judd, B. R. & McCord, R. K.

Object Type: Article

System: The UNT Digital Library

(open access)

Summary of Thomson-scattering data from the Tandem Mirror Experiment (TMX)

We provide a synthesis of our Thomson-scattering measurements of electron temperature (T/sub e/) and density (n/sub e/) for the Tandem Mirror Experiment (TMX). TMX operated in two modes - high and low T/sub e/. When performing in the high T/sub e/ mode (in general > 100 eV), heating the central-cell ions with neutral beams raised T/sub e/ in the end plug. We achieved a maximum T/sub e/ of 260 eV in the east end plug. Specifically, our experiments demonstrated that in the end plug, the radial T/sub e/ profiles were flat to r = 5 cm; the ratio of potential (phi/sub p/) to T/sub e/ ranged between four and six. In addition, we found that although T/sub e/ in the central cell was generally comparable to that in the plug, it was often not constant along a magnetic field line. Under some conditions a non-Maxwellian electron distribution may have been present.

Date: January 11, 1982

Creator: Goodman, R.K.

Object Type: Report

System: The UNT Digital Library

(open access)

Fusion Breeder Program interim report

This interim report for the FY82 Fusion Breeder Program covers work performed during the scoping phase of the study, December, 1981-February 1982. The goals for the FY82 study are the identification and development of a reference blanket concept using the fission suppression concept and the definition of a development plan to further the fusion breeder application. The context of the study is the tandem mirror reactor, but emphasis is placed upon blanket engineering. A tokamak driver and blanket concept will be selected and studied in more detail during FY83.

Date: June 11, 1982

Creator: Moir, R.; Lee, J. D. & Neef, W.

Object Type: Report

System: The UNT Digital Library

(open access)

Detection and sizing of underbead cracks using ultrasonic nondestructive examination

Ultrasonic nondestructive examination (NDE) will detect three mil deep underbead cracks in welds joining thin walled iridium hemishells. A correlation was developed to relate the amplitude of the signal reflected from the crack with crack wall area. The observed cracks occur in the weld underbead in the arc taper area during encapsulation of /sup 238/PuO/sub 2/ pellets for thermoelectric generators used in deep space exploration.

Date: February 11, 1982

Creator: Scarbrough, J.D. & Wierzbicki, W.M.

Object Type: Report

System: The UNT Digital Library

(open access)

[Newspaper clipping: Judge helped post vote-fraud signs]

Xerographic of a newspaper clipping from the Dallas Times Herald article regarding the posting of voting fraud warnings in Dallas neighborhoods by Judge Jack Hampton.

Date: November 11, 1982

Creator: Dallas Times Herald

Object Type: Clipping

System: The UNT Digital Library

(open access)

The Panola Panorama (Carthage, Tex.), Vol. 33, No. 2, Ed. 1 Monday, October 11, 1982

Semimonthly student newspaper from Panola Junior College in Carthage, Texas that includes news of interest to the Panola Junior College community along with advertising.

Date: October 11, 1982

Creator: Kaun, Paul

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Tulia Herald (Tulia, Tex.), Vol. 74, No. 6, Ed. 1 Thursday, February 11, 1982

Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.

Date: February 11, 1982

Creator: Tooley, Wendell

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Tulia Herald (Tulia, Tex.), Vol. 74, No. 45, Ed. 1 Thursday, November 11, 1982

Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.

Date: November 11, 1982

Creator: Tooley, Wendell

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Tulia Herald (Tulia, Tex.), Vol. 74, No. 10, Ed. 1 Thursday, March 11, 1982

Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.

Date: March 11, 1982

Creator: Tooley, Wendell

Object Type: Newspaper

System: The Portal to Texas History

(open access)

[Envelope Addressed to Rigdon Edwards]

Envelope addressed to Rigdon Edwards in Sweetwater, Texas, from Rexroat in Skyview Acres in New Mexico.

Date: December 11, 1982

Creator: unknown

Object Type: Text

System: The Portal to Texas History

(open access)

Safety analysis report for the Heavy-Element Facility (Building 251), Lawrence Livermore National Laboratory

A comprehensive safety analysis was performed on the Lawrence Livermore National Laboratory's Heavy Element Facility, Building 251. The purpose of the analysis was to evaluate the building and its operations in order to inform LLNL and the Department of Energy of the risks they assume at Building 251. This was done by examining all of the energy sources and matching them with the physical and administrative barriers that control, prevent, or mitigate their hazards. Risk was evaluated for each source under both normal and catastrophic circumstances such as fire, flood, high wind, lighting, earthquake, and criticality. No significant safety deficiencies were found; it is concluded that the operation of the facility presents no unacceptable risk.

Date: October 11, 1982

Creator: Kvam, David J.

Object Type: Report

System: The UNT Digital Library

(open access)

Development of a multimaterial, two-dimensional, arbitrary Lagrangian-Eulerian mesh computer program

We have developed a large, multimaterial, two-dimensional Arbitrary Lagrangian-Eulerian (ALE) computer program. The special feature of an ALE mesh is that it can be either an embedded Lagrangian mesh, a fixed Eulerian mesh, or a partially embedded, partially remapped mesh. Remapping is used to remove Lagrangian mesh distortion. This general purpose program has been used for astrophysical modeling, under the guidance of James R. Wilson. The rationale behind the development of this program will be used to highlight several important issues in program design.

Date: October 11, 1982

Creator: Barton, R. T.

Object Type: Article

System: The UNT Digital Library

(open access)

Front-lighted shadowgraphic method and apparatus

High contrast silhouette images of a substantially opaque object are obtained using front illumination techniques. The object is frontally illuminated by light of a first polarization. A frontal surface of the object reflects the incident light to an observation station. The polarization of incident light bypassing the object and incident on a background is changed. The background light is reflected to the observation station, and the intensity of one of the two, differently polarized, reflected images is substantially reduced with respect to the other. Apparatus for carrying out the method includes a first polarizer for polarizing frontally incident illuminating light, a second polarizer behind the object and a reflective surface behind the second polarizer. A polarization analyzer, located in front of the object, is used to extinguish one of the two reflected images. Apparatus for carrying out the invention in instruments having a polarized light source and a polarization analyzer includes a combination of a polarizing material, for contacting a rear surface of the object, and a reflective surface provided adjacent the rear surface of the polarizing material. The combination is applied to the rear surface of the object. Back-surface mirrors of pleochroic substrates, applied to thin film physical vapor-deposited …

Date: February 11, 1982

Creator: unknown

Object Type: Patent

System: The UNT Digital Library

(open access)

Improved eddy current angle probe

Apparatus is described for detecting flaws in a tubular workpiece in a single scan. The coils of a dual coil bobbin eddy current inspection probe are wound at a 45/sup 0/ angle to the transverse axis of the probe, one coil having an angular position about the axis about 90/sup 0/ relative to the angular position of the other coil, and the angle of intersection of the planes containing the coils being about 60/sup 0/.

Date: February 11, 1982

Creator: Nance, R.A.; Hartley, W.H. & Caffarel, A.J.

Object Type: Patent

System: The UNT Digital Library