4,579 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Contamination"

open access

Experience base for Radioactive Waste Thermal Processing Systems: A preliminary survey

In the process of considering thermal technologies for potential treatment of the Idaho National Engineering Laboratory mixed transuranic contaminated wastes, a preliminary survey of the experience base available from Radioactive Waste Thermal Processing Systems is reported. A list of known commercial radioactive waste facilities in the United States and some international thermal treatment facilities are provided. Survey focus is upon the US Department of Energy thermal treatment facilities. A… more

Date: April 1, 1992

Creator: Mayberry, J.; Geimer, R.; Gillins, R.; Steverson, E.M.; Dalton, D. (Science Applications International Corp., Idaho Falls, ID (United States)) & Anderson, G.L. (EG and G Idaho, Inc., Idaho Falls, ID (United States))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Decontamination of Savannah River Plant H-Area hot-canyon crane

Decontamination techniques applicable to the remotely operated bridge cranes in canyon buildings at the Savannah River Plant (SRP) were identified and were evaluated in laboratory-scale tests. High pressure Freon blasting was found to be the most attractive process available for this application. Strippable coatings were selected as an alternative technique in selected applications. The ability of high pressure Freon blasting plus two strippable coatings (Quadcoat 100 and Alara 1146) to remove … more

Date: January 1, 1985

Creator: Rankin, W N & Sims, J R

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Design and operation of an inert gas facility for thermoelectric generator storage

While the flight hardware is protected by design from the harsh environments of space, its in-air storage often requires special protection from contaminants such as dust, moisture and other gases. One of these components, the radioisotope thermoelectric generator (RTG) which powers the missions, was deemed particularly vulnerable to pre-launch aging because the generators remain operational at core temperatures in excess of 1000 degrees centigrade throughout the storage period. Any oxygen perm… more

Date: January 1, 1990

Creator: Goebel, C. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Evaluation of proposed designs for streamflow monitoring structures at waste disposal sites

Design of small surface water monitoring stations associated with waste sites requires an approach that balances several problems. The monitoring site must have a capacity for a wide range of flows, allow accurate measurements over the full performance range, minimize effects from accumulation of contaminated sediments, and minimize costs of construction and operation. Selecting a station design that takes these factors into consideration can be done systematically through use of formal decisio… more

Date: January 1, 1991

Creator: Clapp, R. B.; Borders, D. M.; Tardiff, M. F. & Huff, D. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Corrosion problems in Ti/KC1O/sub 4/ loaded devices when subjected to humid environments

A piston motor/igniter loaded with a Ti/KClO/sub 4/ pyrotechnic and sealed with a silicone adhesive exhibited serious corrosion problems during aging. Five 24-hour thermal cycles between room temperature and 71/sup 0/C at 90% relative humidity resulted in extensive surface corrosion of the Kovar pins and severe stress corrosion cracking of the Kovar pins in the vicinity of the bridgewire weld. No corrosion or cracking of the Nichrome bridgewire was observed. Similar results were observed after … more

Date: January 1, 1980

Creator: Massis, T. M.; Healey, J. T.; Huskisson, D. H. & Perkins, W. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Plutonium, americium, and uranium in blow-sand mounds of safety-shot sites at the Nevada Test Site and the Tonopah Test Range

Blow-sand mounds or miniature sand dunes and mounds created by burrowing activities of animals were investigated by the Nevada Applied Ecology Group (NAEG) to determine the influence of mounds on plutonium, americium, and uranium distributions and inventories in areas of the Nevada Test Site and Tonopah Test Range. Those radioactive elements were added to the environment as a result of safety experiments of nuclear devices. Two studies were conducted. The first was to estimate the vertical dist… more

Date: January 1, 1977

Creator: Essington, E. H.; Gilbert, R. O.; Wireman, D. L.; Brady, D. N. & Fowler, E. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

FY 1992 task plans for the Hanford Environmental Dose Reconstruction Project

Phase 1 of the HEDR Project was designed to develop and demonstrate a method for estimating radiation doses people may have received from Hanford Site operations since 1944. The method researchers developed relied on a variety of measured and reconstructed data as input to a modular computer model that generates dose estimates and their uncertainties. As part of Phase 1, researchers used the reconstructed data and computer model to calculate preliminary dose estimates for populations from limit… more

Date: October 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fifth in situ vitrification engineering-scale test of simulated INEL buried waste sites

In September 1990, an engineering-scale in situ vitrification (ISV) test was conducted on sealed canisters containing a combined mixture of buried waste materials expected to be present at the Idaho National Engineering Laboratory (INEL) Subsurface Disposal Area (SDA). The test was part of a Pacific Northwest Laboratory (PNL) program to assist INEL in treatability studies of the potential application of ISV to mixed transuranic wastes at the INEL SDA. The purpose of this test was to determine t… more

Date: June 1, 1992

Creator: Bergsman, T.M.; Shade, J.W. (Pacific Northwest Lab., Richland, WA (United States)) & Farnsworth, R.K. (EG and G Idaho, Inc., Idaho Falls, ID (United States))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Surface footprint from initial Chernobyl release as indicated by the meso-alpha MLAM (Multi-Layer Air Mass) model

This document reports the results of dose calculations from the Chernobyl reactor accident in April 1986. The calculations were completed in 1987. The results are now being published to disseminate the information to an audience of potential users. This study's objective was to model the transport path of materials released during April 26 and 27, the first 48 hours of the accident. 5 refs., 15 figs.

Date: December 1, 1989

Creator: Davis, W. E.; Olsen, A. R.; Didier, B. T.; Tucker, P. E. & Damschen, D. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Stability of plutonium contaminated sediments in the Miami--Erie Canal. [Mound Facility, Ohio, radioactive effluents monitoring]

This study was conducted to evaluate the stability of plutonium-contaminated sediment in the Miami-Erie Canal. Correlations were sought to relate concentrations at air sampling stations to plutonium-238 concentrations in air and stack emissions, wind direction, particulate loading, rainfall, and construction activities. There appears to be some impact on airborne concentrations at air sampling stations 122 and 123 from the contaminated sediment in the canal and ponds area. For purposes of this … more

Date: March 1, 1978

Creator: Farmer, Billy M. & Carfagno, Daniel G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Internal dosimetry technical basis manual

The internal dosimetry program at the Savannah River Site (SRS) consists of radiation protection programs and activities used to detect and evaluate intakes of radioactive material by radiation workers. Examples of such programs are: air monitoring; surface contamination monitoring; personal contamination surveys; radiobioassay; and dose assessment. The objectives of the internal dosimetry program are to demonstrate that the workplace is under control and that workers are not being exposed to r… more

Date: December 20, 1990

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

SOILD: A computer model for calculating the effective dose equivalent from external exposure to distributed gamma sources in soil

The SOLID computer model was developed for calculating the effective dose equivalent from external exposure to distributed gamma sources in soil. It is designed to assess external doses under various exposure scenarios that may be encountered in environmental restoration programs. The models four major functional features address (1) dose versus source depth in soil, (2) shielding of clean cover soil, (3) area of contamination, and (4) nonuniform distribution of sources. The model is also capab… more

Date: January 1, 1991

Creator: Chen, S. Y.; LePoire, D.; Yu, C. (Argonne National Lab., IL (United States)); Schafetz, S. (Rockland Community Coll., Suffern, NY (United States)) & Mehta, P. (Fayetteville State Univ., NC (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Interactive planning system for developing decommissioning and decontamination plans at Hanford

The 570-square mile Hanford Project contains facilities with varying degrees of radioactive contamination as a result of plutonium production operations. With the evolution of production requirements and technology, many of these have been retired and will be decommissioned and decontaminated (D and D). Planning for D and D at Hanford requires identification and characterization of contaminated facilities, prioritization of facilities for decommissioning, selection of D and D modes, estimating … more

Date: September 1, 1977

Creator: Litchfield, J. W. & King, J. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Radioactive waste management in the former USSR

Radioactive waste materials--and the methods being used to treat, process, store, transport, and dispose of them--have come under increased scrutiny over last decade, both nationally and internationally. Nuclear waste practices in the former Soviet Union, arguably the world's largest nuclear waste management system, are of obvious interest and may affect practices in other countries. In addition, poor waste management practices are causing increasing technical, political, and economic problems … more

Date: June 1, 1992

Creator: Bradley, D.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

INEL waste cleanup

Decommissioning and decontamination activities at the Idaho National Engineering Laboratory are discussed. The projects planned and completed are presented. Problems encountered on these projects are discussed. A developmental program is recommended. Contaminated areas consist of test reactors, reactor support facilities, a fuel reprocessing facility and various soil areas. One D and D project in 1960 occurred as a result of an accident at a low-power reactor in which 3 persons were killed, the… more

Date: January 1, 1979

Creator: Chapin, J.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Radiological assessment report for the Lansdowne property, 105-107 East Stratford Avenue, Lansdowne, Pennsylvania, October-December 1984

Areas with elevated levels of radioactivity were found throughout both residences, as well as on the surrounding property. Contamination was also found in the garage behind the 105 East structure. The 105 East residence had substantially more contamination than the 107 East residence, as was expected. The chimneys, particularly the rear chimney, from the 105 East residence had extensive contamination, indicating that contaminated materials may have been burned at the site. The high background r… more

Date: September 1, 1985

Creator: Wynveen, R.A.; Smith, W.H.; Sholeen, C.M. & Flynn, K.F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Combustible radioactive waste treatment by incineration and chemical digestion

A review is given of present and planned combustible radioactive waste treatment systems in the US. Advantages and disadvantages of various systems are considered. Design waste streams are discussed in relation to waste composition, radioactive contaminants by amount and type, and special operating problems caused by the waste.

Date: May 28, 1980

Creator: Stretz, L. A.; Crippen, M. D. & Allen, C. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Annual hydrologic data summary for the White Oak Creek Watershed: Water Year 1990 (October 1989--September 1990)

This report summarizes, for the Water Year 1990 (October 1989-- September 1990), the dynamic hydrologic data collected on the Whiteoak Creek (WOC) Watershed's surface and subsurface flow systems. These systems affect the quality or quantity of surface water and groundwater. The collection of hydrologic data is one component of numerous, ongoing Oak Ridge National Laboratory (ORNL) environmental studies and monitoring programs and is intended to 1. characterize the quantity and quality of water … more

Date: September 1, 1991

Creator: Borders, D. M.; Gregory, S. M.; Clapp, R. B.; Frederick, B. J.; Moore, G. K.; Watts, J. A. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Determination of chloride contamination on detonator components by SAM and ESCA

No Description Available.

Date: May 19, 1975

Creator: Colmenares, C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Corrosion and scaling by steam in nuclear geothermal power plants

No Description Available.

Date: June 2, 1972

Creator: Krikorian, O.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Considerations in recycling contaminated scrap metal and rubble

Management options for the Department of Energy's increasing amounts of contaminated scrap metal and rubble include reuse as is, disposal, and recycling. Recycling, with its promise of resource recovery, virgin materials conservation, and land disposal minimization, emerges as a preferred management technique. Implementing a cost effective recycling program requires resolution of several issues including: establishing release limits for contaminants, controlling use of recycled materials creati… more

Date: January 1, 1992

Creator: Kluk, A.F. (USDOE, Washington, DC (United States)) & Hocking, E.K. (Argonne National Lab., Washington, DC (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Comprehensive work plan and health and safety plan for the 7500 Area Contamination Site sampling at Oak Ridge National Laboratory, Oak Ridge, Tennessee

As part of the Environmental Restoration Program sponsored by the US Department of Energy's Office of Environmental Restoration and Waste Management, this plan has been developed for the environmental sampling efforts at the 7500 Area Contamination Site, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee. This plan was developed by the Measurement Applications and Development Group (MAD) of the Health and Safety Research Division of ORNL and will be implemented by ORNL/MAD. Major compon… more

Date: May 1, 1992

Creator: Burman, S. N.; Landguth, D. C.; Uziel, M. S.; Hatmaker, T. L. & Tiner, P. F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Potential airborne release from soil-working operations in a contaminated area

Experiments were performed to provide an indication of how much material could be made airborne during soil-working operations in a contaminated area. Approximately 50 kg of contaminated soil were collected, dried, and mixed, and particle size distribution and /sup 137/Cs content were characterized. In four experiments performed in a 2 ft x 2 ft wind tunnel at the Radioactive Aerosol Release Test Facility, soil was pumped into an airstream moving at 3.2, 10.4, 15.2, and 20 mph. These experiment… more

Date: August 1, 1980

Creator: Sutter, S. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

FUEL ELEMENT DEVELOPMENT PROGRAM FOR THE PEBBLE BED REACTOR. Final Report

>The basic fuel element consisted of a uniform dispersion of fuel in a 1 1/2 inch diameter graphite sphere. Ceramic coatings for the retention of fission products were studied. It was found-that molecularly deposited'' ceramics such as alumina, siliconized silicon carbide, and pyrolytic carbon were excellent barriers to fission product leakage. The most advantageous location for ceramic coatings was found to be on the individual fuel particles, where the coating was subject to smaller forces an… more

Date: April 30, 1961

Item Type: Report

Partner: UNT Libraries Government Documents Department