The Experts below are selected from a list of 258 Experts worldwide ranked by ideXlab platform
T.m. Greager - One of the best experts on this subject based on the ideXlab platform.
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Hanford Site Transuranic (TRU) Waste Sampling Plan
2000Co-Authors: T.m. GreagerAbstract:The Hanford Site Transuranic Waste sampling Plan describes the selection of containers for sampling of homogeneous solids and soil/gravel and for visual examination of Transuranic and mixed Transuranic (collectively referred to as TRU) Waste generated at the U.S. Department of Energy (DOE) Hanford Site.
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Hanford Site Transuranic (TRU) Waste Certification Plan
1999Co-Authors: T.m. GreagerAbstract:The Hanford Site Transuranic Waste Certification Plan establishes the programmatic framework and criteria within which the Hanford Site ensures that contract-handled TRU Wastes can be certified as compliant with the WIPP WAC and TRUPACT-II SARP
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Final Hanford Site Transuranic (TRU) Waste Characterization QA Project Plan
1999Co-Authors: T.m. GreagerAbstract:The Transuranic Waste Characterization Quality Assurance Program Plan required each U.S. Department of Energy (DOE) site that characterizes Transuranic Waste to be sent the Waste Isolation Pilot Plan that addresses applicable requirements specified in the quality assurance project plan (QAPP).
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Hanford site Transuranic Waste sampling plan
1999Co-Authors: T.m. GreagerAbstract:This sampling plan (SP) describes the selection of containers for sampling of homogeneous solids and soil/gravel and for visual examination of Transuranic and mixed Transuranic (collectively referred to as TRU) Waste generated at the U.S. Department of Energy (DOE) Hanford Site. The activities described in this SP will be conducted under the Hanford Site TRU Waste Certification Program. This SP is designed to meet the requirements of the Transuranic Waste Characterization Quality Assurance Program Plan (CAO-94-1010) (DOE 1996a) (QAPP), site-specific implementation of which is described in the Hanford Site Transuranic Waste Characterization Program Quality Assurance Project Plan (HNF-2599) (Hanford 1998b) (QAPP). The QAPP defines the quality assurance (QA) requirements and protocols for TRU Waste characterization activities at the Hanford Site. In addition, the QAPP identifies responsible organizations, describes required program activities, outlines sampling and analysis strategies, and identifies procedures for characterization activities. The QAPP identifies specific requirements for TRU Waste sampling plans. Table 1-1 presents these requirements and indicates sections in this SP where these requirements are addressed.
J.a. Demiter - One of the best experts on this subject based on the ideXlab platform.
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Degradation of Transuranic Waste drums in underground storage
Transactions of the American Nuclear Society, 1995Co-Authors: D.r. Duncan, D.c. Derosa, J.a. DemiterAbstract:The Hanford site is one of several U.S. Department of Energy locations that has Transuranic radioactive Waste in storage, resulting from nuclear weapons material production. Transuranic Waste has extremely long-lived radionuclides requiring great care in management; such Waste is slated for eventual disposal in the Waste Isolation Pilot Plant in New Mexico. Most of this Waste is stored in 208-{ell} (55-gal) drums below ground. At the Hanford site 37 641 drums are stored in several trenches. The drums were stacked up to five high with plywood sheeting between the layers and on top of the stacks. Plastic tarps were used to cover the drums and the plywood, with several feet of earth backfilled on top of the plastic. A fraction of the drums ({approximately}20%) were covered only with earth, not with plywood and plastic. The drums are either painted low-carbon steel or galvanized low-carbon steel. They have been placed in storage from 1970 to 1988, resulting in between 7 and 25 yr of storage. The environment is either soil or air atmosphere. The air atmosphere environment also includes, for some drum surfaces, contact with the underside of the tarp. The temperature of the air atmosphere is relatively uniform. Year-round measurementsmore » have not been taken, but available data suggest that the temperature span should be from {approximately} 10 to 30{degrees}C (50 to 86{degrees}F). Humidity in underground storage module mock-ups has been measured at nearly 90% during testing in the summer months. Subsequent tests have shown that the humidity probably drops to 50 to 60% during other seasons. This report describes results of a project to inspect the condition of the Waste drums.« less
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application of service examinations to Transuranic Waste container integrity at the hanford site
1994Co-Authors: D A Burbank, B.c. Anderson, J.a. DemiterAbstract:Transuranic Waste containers in retrievable storage trenches at the Hanford Site and their storage environment are described. The containers are of various types, predominantly steel 0.21-M3 (55-gal) drums and boxes of many different sizes and materials. The storage environment is direct soil burial and aboveground storage under plastic tarps with earth on top of the tarps. Available data from several Transuranic Waste storage sites are summarized and degradation rates are projected for containers in storage at the Hanford Site.
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Application of service examinations to Transuranic Waste container integrity at the Hanford Site. Revision 1
1993Co-Authors: D.r. Duncan, B.c. Anderson, D A Burbank, J.a. DemiterAbstract:Transuranic Waste containers in retrievable storage trenches at the Hanford Site and their storage environment are described. The containers are of various types, predominantly steel 0.21-m{sup 3} (55-gal) drums and boxes of many different sizes and materials. The storage environment is direct soil burial and aboveground storage under plastic tarps with earth on top of the tarps. Available data from several Transuranic Waste storage sites are summarized and degradation rates are projected for containers in storage at the Hanford Site.
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Hanford Site Transuranic Waste container integrity
1991Co-Authors: D.r. Duncan, B.c. Anderson, J.a. DemiterAbstract:The Transuranic Waste containers stored in the retrievable storage units at the Hanford Site are described along with a description of their environment. The containers are of various types, predominantly steel 0.21-m{sup 3} (55-gal) drums and boxes of many different sizes and materials. The storage environment is direct soil burial and storage in atmospheric conditions under plastic tarps with earth on top of the tarps. Available data from several Transuranic Waste storage sites are summarized and degradation rates are projected for containers in storage at the Hanford Site. 13 refs., 3 figs.
S. R. Waichler - One of the best experts on this subject based on the ideXlab platform.
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Environmental application of stable xenon and radioxenon monitoring
Lawrence Berkeley National Laboratory, 2008Co-Authors: P. E. Dresel, K. B. Olsen, J. C. Hayes, J. I. Mcintyre, S. R. Waichler, Brian D. Milbrath, Matthew W. Cooper, B. M. KennedyAbstract:Characterization of Transuranic Waste is needed to make decisions about Waste site remediation. Soil-gas sampling for xenon isotopes can be used to define the locations of spent fuel and Transuranic Wastes. Radioxenon in the subsurface is characteristic of Transuranic Waste and can be measured with extreme sensitivity using large-volume soilgas samples. Measurements at the Hanford Site showed 133Xe and 135Xe levels indicative of 240Pu spontaneous fission. Stable xenon isotopic ratios from fission are distinct from atmospheric xenon background. Neutron capture by 135Xe produces an excess of 136Xe in reactor-produced xenon providing a means of distinguishing spent fuel from separated Transuranic materials.
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Environmental applications of stable xenon and radioxenon monitoring
Journal of Radioanalytical and Nuclear Chemistry, 2008Co-Authors: P. E. Dresel, K. B. Olsen, J. C. Hayes, J. I. Mcintyre, S. R. Waichler, B. M. KennedyAbstract:Characterization of Transuranic Waste is needed for decisions about Waste site remediation. Soil-gas sampling for xenon isotopes can be used to define the locations of spent fuel and Transuranic Waste. Radioxenon in the subsurface is characteristic of Transuranic Waste and can be measured with extreme sensitivity using large-volume soil-gas samples. Measurements at the Hanford Site showed ^133Xe and ^135Xe levels indicative of ^240Pu spontaneous fission. Stable xenon isotopic ratios from fission are distinct from atmospheric xenon background. Neutron capture by ^135Xe produces an excess of ^136Xe in reactor-produced xenon, providing a means of distinguishing spent fuel from separated Transuranic material.
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sampling and analysis of rare gas isotopes for in situ delineation of buried Transuranic and tritium Waste
2006Co-Authors: P E Dresel, K. B. Olsen, J C Hayes, J I Mcintyre, S. R. WaichlerAbstract:Improved understanding of the type and location of buried Waste is needed at several U.S. Department of Energy sites to make remedial decisions and for planning excavation and retrieval activities. Soil-gas sampling for the rare gases helium and xenon can be used to define the locations of tritium and Transuranic Waste. Soil-gas sampling is a minimally invasive technique, in that direct penetration of the Waste is not required and no hazardous material is brought to the surface. Sampling options include shallow hand or jackhammer driven sampling points and deeper Geoprobe{sup R} or cone penetrometer direct-push methods. Short-lived radio-xenon isotopes are continuously produced by spontaneous fission of Pu-240 in Wastes. Large volume soil-gas samples provide an extremely sensitive way to measure radioactive xenon in the subsurface and characterize the presence of Transuranic Waste. The analysis employs a modified Automated Radio-xenon Sampling and Analysis (ARSA) system, developed for Comprehensive Test Ban Treaty verification. Proof-of-principle measurements at a Hanford Site liquid Waste disposal facility showed Xe-133 at levels approximately 16,000 times the detection limit and lower levels of Xe-135. Stable xenon isotopes are produced in nuclear fuel during reactor operations and to a lesser extent by spontaneous fission in Transuranic Waste. The isotopicmore » ratios are determined by rare-gas mass spectrometry and can be used to distinguish reactor xenon from spontaneous fission and natural background. Samples collected outside a Hanford burial ground indicated the burial ground contains irradiated fuel consistent with reactors operated on the Hanford Site. Although considerable information can be extracted from the stable isotope ratios, the method is less sensitive than the radio-xenon measurements due to the presence of background atmospheric stable xenon. He-3, the stable radioactive decay product of H-3, is highly mobile in the subsurface. Anomalous He-3:He-4 isotope ratios have been detected outside a Hanford burial ground at levels that suggest the presence of tritium target material within the disposal caissons. (authors)« less
B. M. Kennedy - One of the best experts on this subject based on the ideXlab platform.
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Environmental application of stable xenon and radioxenon monitoring
Lawrence Berkeley National Laboratory, 2008Co-Authors: P. E. Dresel, K. B. Olsen, J. C. Hayes, J. I. Mcintyre, S. R. Waichler, Brian D. Milbrath, Matthew W. Cooper, B. M. KennedyAbstract:Characterization of Transuranic Waste is needed to make decisions about Waste site remediation. Soil-gas sampling for xenon isotopes can be used to define the locations of spent fuel and Transuranic Wastes. Radioxenon in the subsurface is characteristic of Transuranic Waste and can be measured with extreme sensitivity using large-volume soilgas samples. Measurements at the Hanford Site showed 133Xe and 135Xe levels indicative of 240Pu spontaneous fission. Stable xenon isotopic ratios from fission are distinct from atmospheric xenon background. Neutron capture by 135Xe produces an excess of 136Xe in reactor-produced xenon providing a means of distinguishing spent fuel from separated Transuranic materials.
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Environmental applications of stable xenon and radioxenon monitoring
Journal of Radioanalytical and Nuclear Chemistry, 2008Co-Authors: P. E. Dresel, K. B. Olsen, J. C. Hayes, J. I. Mcintyre, S. R. Waichler, B. M. KennedyAbstract:Characterization of Transuranic Waste is needed for decisions about Waste site remediation. Soil-gas sampling for xenon isotopes can be used to define the locations of spent fuel and Transuranic Waste. Radioxenon in the subsurface is characteristic of Transuranic Waste and can be measured with extreme sensitivity using large-volume soil-gas samples. Measurements at the Hanford Site showed ^133Xe and ^135Xe levels indicative of ^240Pu spontaneous fission. Stable xenon isotopic ratios from fission are distinct from atmospheric xenon background. Neutron capture by ^135Xe produces an excess of ^136Xe in reactor-produced xenon, providing a means of distinguishing spent fuel from separated Transuranic material.
Woo Y Yoon - One of the best experts on this subject based on the ideXlab platform.
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uncertainty analysis of a nondestructive radioassay system for Transuranic Waste
Waste Management, 1996Co-Authors: Yale D Harker, Larry G Blackwood, Teresa R Meachum, Woo Y YoonAbstract:Radioassay of Transuranic Waste in 207 liter drums currently stored at the Idaho National Engineering Laboratory is achieved using a Passive Active Neutron (PAN) nondestructive assay system. In order to meet data quality assurance requirements for shipping and eventual permanent storage of these drums at the Waste Isolation Pilot Plant in Carlsbad, New Mexico, the total uncertainty of the PAN system measurements must be assessed. In particular, the uncertainty calculations are required to include the effects of variations in Waste matrix parameters and related variables on the final measurement results. Because of the complexities involved in introducing Waste matrix parameter effects into the uncertainty calculations, standard methods of analysis (e.g. experimentation followed by propagation of errors) could not be implemented. Instead, a modified statistical sampling and verification approach was developed. In this modified approach the total performance of the PAN system is simulated using computer models of the assay system and the resultant output is compared with the known input to assess the total uncertainty. This paper describes the simulation process and illustrates its application to Waste comprised of weapons grade plutonium-contaminated graphite molds.
