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State-of-the-art for evaluating the potential impact of tectonism and volcanism on a radioactive waste repository (open access)

State-of-the-art for evaluating the potential impact of tectonism and volcanism on a radioactive waste repository

Most estimates of the time required for safe isolation of radioactive wastes from the biosphere range from 100,000 to 1,000,000 years. For such long time spans, it is necessary to assess the potential effects of geologic processes such as volcanism and tectonic activity on the integrity of geologic repositories. Predictions of geologic phenomena can be based on probabilistic models, which assume a random distribution of events. The necessary historic and geologic records are rarely available to provide an adequate data base for such predictions. The observed distribution of volcanic and tectonic activity is not random, and appears to be controlled by extremely complex deterministic processes. The advent of global plate tectonic theory in the past two decades has been a giant step toward understanding these processes. At each potential repository site, volcanic and tectonic processes should be evaluated to provide the most thorough possible understanding of those deterministic processes. Based on this knowledge, judgements will have to be made as to whether or not the volcanic and tectonic processes pose unacceptable risk to the integrity of the repository. This report describes the potential hazards associated with volcanism and tectonism, and the means for evaluating these processes.
Date: July 16, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
ORR Operations for Period April 1961 to April 1962 (open access)

ORR Operations for Period April 1961 to April 1962

A summary of the activities in the 4th operational year is presented for the ORR. On-stream time at 30 Mw was relatively steady with 75.4 and 83.7% representing the lowest and highest quarters. Modification of the ball-latch mechanism of the shim-rod-drives is in progress. The primary cooling system bypass control valve was modified and a d-c pony motor was added at the No. 3 primary pump. This addition was made to increase the reliability of adequate water flow for afterheat cooling. A study of coreboiling detection is being conducted. (J.R.D.)
Date: October 16, 1962
Creator: Binford, F.T.; Casto, W.R. & Colomb, A.L.
Object Type: Report
System: The UNT Digital Library
Cause of pitting in beryllium (open access)

Cause of pitting in beryllium

Light microscopy, bare-film radiography, secondary ion mass spectroscopy, electron microprobe and physical testing were used to examine beryllium specimens exhibiting a stratified, pitted, pattern after chemical milling. The objective was to find the cause of this pattern. Specimens were found to have voids in excess of density specification allowances. These voids are attributed, at least in part, to the sublimation of beryllium fluoride during the vacuum hot pressing operation. The origin of the pattern is attributed to these voids and etching out of fines and associated impurities. Hot isostatic pressing with a subsequent heat treatment close residual porosity and dispersed impurities enough to correct the problem.
Date: April 16, 1982
Creator: Kershaw, R. P.
Object Type: Article
System: The UNT Digital Library
State-of-the-art for evaluating the potential impact of flooding on a radioactive waste repository (open access)

State-of-the-art for evaluating the potential impact of flooding on a radioactive waste repository

This report is a review of the state-of-the-art for evaluating the potential impact of flooding on a deep radioactive-waste repository, namely, for predicting the future occurrence of catastrophic flooding and for estimating the effect of such flooding on waste containment characteristics. Several detrimental effects are identified: flooding can increase groundwater seepage velocities through a repository within the framework of the existing hydrologic system and thus increase the rate of radioactive-waste leakage to the biosphere; flooding may alter repository hydrology by reversing flow gradients, relocating sources of groundwater recharge and discharge, or shortening seepage paths, thereby producing unpredictable leakage; saturation of a vadose-zone repository during flooding can increase groundwater seepage velocities by several orders of magnitude; and flooding can damage repository-media containment properties by inducing seismic or chemical instability or increasing fracture permeability in relatively shallow repository rock as a result of redistributing in-situ stresses. Short-term flooding frequency and magnitude can be predicted statistically by analyzing historical records of flooding. However, long-term flooding events that could damage a permanent repository cannot be predicted with confidence because the geologic record is neither unique nor sufficienly complete for statistical analysis. It is more important to identify parameters characterizing containment properties (such as permeability, …
Date: July 16, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Determination of Heavy Water Purity by Infrared Absorption (open access)

Determination of Heavy Water Purity by Infrared Absorption

The practical application of heavy water purity determination by infrared absorption spectroscopy using standard laboratory equipment was demonstrated in connection with the operation of heavy water-moderated Special Power Excursion Reactor Test (SPERT II) Facillty at the NRTS. (auth)
Date: January 16, 1962
Creator: Abernathey, R. M. & Morgan, T. D.
Object Type: Report
System: The UNT Digital Library
Bumps and poles in the S-matrix: A systematic study of 0 sup ++ and 2 sup ++ mesons plus a molecule approach to the E(1420) in the K K. pi. system (open access)

Bumps and poles in the S-matrix: A systematic study of 0 sup ++ and 2 sup ++ mesons plus a molecule approach to the E(1420) in the K K. pi. system

The goal of Hadron Spectroscopy is to find the spectrum of states formed by color singlet arrangements of quarks and gluons. Ideally these spectral states are associated with poles of the scattering matrix of hadrons which are the decay channels of the states. For example the {rho} meson is the lowest q{bar q} s-wave, spin one color singlet state and decays into {pi}{sup +}{pi}{sup -}. Since the {rho}decays in a relative p-wave, one finds the {rho} pole in the I = 1 p-wave {pi}{pi} phase shifts. There are forces between quarks and gluons which do not manifest themselves as true resonances and thus cannot be described by a Breit-Wigner pole. I will give some examples that are not Breit-Wigner poles of the scattering matrix but are important bumps in meson production. 22 refs., 10 figs.
Date: November 16, 1989
Creator: Longacre, R. S.
Object Type: Article
System: The UNT Digital Library
Oxidation/gasification of carbon residue on retorted oil shale. Final report (open access)

Oxidation/gasification of carbon residue on retorted oil shale. Final report

Studies of the oxidation and gasification of oil shale char were extended to an investigation of the effects of mineral catalysis. Six shales with differing mineral compositions were studied, including samples from the saline zone in the Western Colorado and from the Antrim shales of Michigan. Oxidation kinetics data, corrected for mass transfer effects, were compared for all six samples. A high assay shale from Utah and a sample from the saline zone were found to have the highest oxidation rates. By examining the data for shales which were water leached and thermally pretreated, it was concluded that both NaO and CaO act as oxidation catalysts. However, as a result of mineral decomposition experiments conducted with a sample from the C-a lease tract, it appears as though the ankeritic dolomite fraction will not decompose as long as there is a minimal CO/sub 2/ over pressure. Rather, low temperature silication reactions appear to take place once the temperature exceeds 925/sup 0/K. An extensive evaluation was also completed for the gasification of an Antrim shale from Michigan. Both the rates of CO/sub 2/ and steam gasification of the char were found to be markedly lower than that observed for a shale sample …
Date: January 16, 1984
Creator: Thomson, W. J.
Object Type: Report
System: The UNT Digital Library
State-of-the-art for evaluating the potential effects of erosion and deposition on a radioactive waste repository. Final report (open access)

State-of-the-art for evaluating the potential effects of erosion and deposition on a radioactive waste repository. Final report

The potential impact of future geologic processes on the integrity of a deep, high-level radioactive-waste repository is evaluated. The following study identifies the potential consequences of surface erosion and deposition on sub-surface repository containment characteristics and assesses the ability to measure and predict quantitatively the rates and corresponding extent of these processes in the long term. Numerous studies of the magnitudes and rates of surficial erosion and deposition that have been used to determine the minimum allowable depth for a geologic repository (300 m - NRC Code of Federal Regulations, Part 60.122, Draft 10) are cited in this report. Measurement and interpretation of potential rates and extent of surficial processes in these studies involved considerable uncertainty, and the implications of this uncertainty on presently proposed repository siting criteria are addressed herein. Important concepts that should be considered when developing siting criteria to protect against deleterious effects arising from future erosion or deposition are highlighted. Erosion agents that could affect deep repositories are distinguished in this report so that their individual and combined impacts may be examined. This approach is recommended when evaluating potential repository sites in diverse environments that are susceptible to different agents of erosion. In contrast, agents of …
Date: July 16, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Introduction to albedo neutron dosimeters (open access)

Introduction to albedo neutron dosimeters

The design, operation, calibration, and performance of albedo neutron dosimeters are discussed. An albedo neutron dosimeter is designed to measure the flux of thermal neutrons which leave the body when a person is exposed to fast energy neutrons. The fast neutrons are scattered and moderated in the body, and many have lost most of their initial energy and emerge as thermal neutrons. The albedo neutron dosimeter is designed to detect this flux of thermal neutrons by using a thermal neutron detector. This could be any type of thermal neutron detector but in practical applications lithium fluoride (LiF) thermoluminescence dosimeters (TLDs) are most frequently used. Various types of albedo neutron dosimeters are described. (WHK)
Date: January 16, 1978
Creator: Hankins, D.E.
Object Type: Article
System: The UNT Digital Library
New Zealand: A Bibliography (open access)

New Zealand: A Bibliography

This report is a bibliography on New Zealand.
Date: February 16, 1970
Creator: Sarkissian, Arshag O.
Object Type: Report
System: The UNT Digital Library
PPBS in 1970: Methodology and Implementation, An Annotated Bibliography (open access)

PPBS in 1970: Methodology and Implementation, An Annotated Bibliography

This report provides an annotated bibliography of resources related to the Federal Planning-Programming-Budgeting System (PPBS) focused on its methodology and structure.
Date: April 16, 1970
Creator: Chartrand, Robert L. & Becker, Louise G.
Object Type: Report
System: The UNT Digital Library
Environmental Affairs in the 91st Congress, 1st Session (open access)

Environmental Affairs in the 91st Congress, 1st Session

This report discusses the growth of environmental policy and provides a listing of introduced legislation related to the environment in the 1st Session of the 91st Congress.
Date: May 16, 1970
Creator: Congressional Research Service. Environmental Policy Division
Object Type: Report
System: The UNT Digital Library
Equal Employment Opportunity in the Construction Industry: The Philadelphia Plan with Related Documents (open access)

Equal Employment Opportunity in the Construction Industry: The Philadelphia Plan with Related Documents

This report discusses the issue of equal employment opportunities in the construction industry and the revised Philadelphia Plan which set numerical goals for the employment of minorities and regulated enforcement of the equal employment regulations. The text of the executive order and related correspondence is included.
Date: March 16, 1970
Creator: Fulton, Joseph F.
Object Type: Report
System: The UNT Digital Library
Dental Manpower in the United States (open access)

Dental Manpower in the United States

This report discusses the number of dentists in the U.S. and their ratio in proportion to the population as well as distribution across the U.S. Educational initiatives, funding programs, and other actions to alleviate a shortage of dentists are discussed.
Date: September 16, 1970
Creator: Kline, Janet
Object Type: Report
System: The UNT Digital Library

[Jim Dale shows interior of decorated cap]

Photograph of the Mayborn School of Journalism Masters Graduates seated at commencement ceremony. Jim Dale, one of the graduates, is showing the interior of his decorated cap. Inside on the mortarboard is a portrait photo of his daughter in sepia tones.
Date: December 16, 2016
Creator: Clark, Junebug
Object Type: Photograph
System: The UNT Digital Library

[Jim Dale shows decorated cap to Dorothy Bland]

Photograph of Mayborn School of Journalism Master's Graduate Jim Dale showing his decorated cap to Dean Dorothy Bland. The cap has a large yellow happy face on the top and a photo of his daughter on the interior.
Date: December 16, 2016
Creator: Clark, Junebug
Object Type: Photograph
System: The UNT Digital Library

[Speaker at the Fall 2016 Graduate Commencement ceremony]

Photograph of a speaker at the Fall 2016 Graduate Commencement ceremony. She is standing at a podium and the crest of UNT is behind her.
Date: December 16, 2016
Creator: Clark, Junebug
Object Type: Photograph
System: The UNT Digital Library
[News Script: UF & Art] (open access)

[News Script: UF & Art]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: October 16, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Vending suit] (open access)

[News Script: Vending suit]

Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a broadcast news story.
Date: December 16, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Dallas council] (open access)

[News Script: Dallas council]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: December 16, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Crash] (open access)

[News Script: Crash]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: October 16, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Violence] (open access)

[News Script: Violence]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: November 16, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Electoral votes] (open access)

[News Script: Electoral votes]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: December 16, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library

[Decorated Graduation caps at commencement ceremony]

Photograph of the crowd of Fall 2016 Graduates. Visible are decorated caps, including two next to each other that say "My Baby Girl" and "My Papa Bear" with arrows pointing at the other.
Date: December 16, 2016
Creator: Clark, Junebug
Object Type: Photograph
System: The UNT Digital Library