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Analytical measurements of actinide migration in a laboratory-simulated basalt HLW repository

Description: Described are the analytical methods and results used to determine the migration of actinides in a flowing-groundwater laboratory-simulation of a basalt repository for high-level nuclear waste. The radiochemical methods developed and employed to measure actinide activities in groundwater samples and component surfaces include the use of gamma, X-rays, and alpha spectroscopy, with associated preparation and calibration. These methods include double isotope spiking with Np-235 and Pu-236 for dete… more
Date: January 1, 1983
Creator: Bowers, D.L.; Gerding, T.J.; Fried, S.M.; Vandegrift, G.F. & Seitz, M.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Environmental monitoring report for Pantex Plant covering 1983

Description: This report summarizes the environmental monitoring program at Pantex Plant for 1983 and presents monitoring data for both radioactive and non-radioactive species in the local environment. Plant activities involve the handling of significant quantities of uranium, plutonium, and tritium. However, only small release of uranium (depleted in the isotope U-238) and tritium occurred which could have affected the local environment. Monitoring data indicate that concentrations of these nuclides in the… more
Date: January 1, 1983
Creator: Laseter, W.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Long-term exposure of /sup 238/PuO/sub 2/ to a terrestrial environment. Volume 2

Description: Two environmental simulation chambers were used to study the behavior of a /sup 238/PuO/sub 2/ heat source deposited in a humid, temperate environment. Large fragments from an impact-tested source were deposited in the first chamber, and fines from the source were placed in the second. Plutonium released into the soil, the soil drainages, and the condensates from the dehumidifiers were monitored throughout the experiment. The concentration of plutonium released into the soil drainages increased… more
Date: September 1, 1983
Creator: Patterson, J. H.; Heaton, R. C.; Herrera, B.; Nelson, G. B. & Steinkruger, F. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Behavior of mixed-oxide fuel subjected to multiple thermal transients

Description: The microstructural behavior of irradiated mixed-oxide fuel subjected to multiple, mild thermal transients was investigated using direct electrical heating. The results demonstrate that significant intergranular porosity, accompanied by large-scale (>90%) release of the retained fission gas, developed as a result of the cyclic heating. Microstructural examination of the fuel indicated that thermal-shock-induced cracking of the fuel contributed significantly to the increased swelling and gas rel… more
Date: November 1, 1983
Creator: Fenske, G.R.; Hofman, G.L.; Neimark, L.A. & Poeppel, R.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spectrochemical determination of tantalum in plutonium metal using direct current plasma emission spectrometry

Description: Tantalum is determined by direct current plasma spectrometry after separation of plutonium from solution as PuF/sub 3/. After centrifugation of the PuF/sub 3/ precipitate, a low level of plutonium remains in solution in sufficient quantity to cause spectral interferences. It is necessary to determine the plutonium by dc plasma spectrometry and apply a correction to determine low tantalum concentrations with good accuracy and precision. Tantalum can be determined down to 0.4 ppM in solution with… more
Date: December 1, 1983
Creator: Fadeff, S.K. & Morris, W.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recovery of plutonium from molten salt extraction residues

Description: Savannah River Laboratory (SRL), Savannah River Plant (SRP), and Rocky Flats Plant (RFP) are jointly developing a process to recover plutonium from molten salt extraction residues. These NaCl, KCl, MgCl/sub 2/ residues, which are generated in the pyrochemical extraction of /sup 241/Am from aged plutonium metal, contain up to 25 wt % dissolved PUCl/sub 3/ and up to 2 wt % AmCl/sub 3/. The objective is to develop a process to convert these residues to plutonium metal product and discardable waste… more
Date: January 1, 1983
Creator: Gray, L.W. & Holcomb, H.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Determination of plutonium isotopic ratios by using low-energy gamma-ray spectroscopy

Description: A nondestructive gamma-ray technique has been developed to determine plutonium isotopic ratios. The technique is based on the high-intensity, low-energy gamma rays at 43.48, 45.23, 51.63, 59.54, and 64.83 keV for /sup 238/Pu, /sup 240/Pu, /sup 239/Pu, /sup 241/Am, and /sup 241/Pu, respectively. The results demonstrate that this technique can accurately measure plutonium samples in a timely manner and in a wide range of masses, isotopic contents, chemical forms, and ages from chemical processing. more
Date: January 1, 1983
Creator: Li, T.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Plutonium release from pressed plutonium oxide fuel pellets in aquatic environments

Description: Plutonium oxide pellets (80% /sup 238/Pu, 40 g each) were exposed to fresh water and sea water at two temperatures for 3 y in enclosed glass chambers. The concentrations of plutonium observed in the waters increased linearly with time throughout the experiment. However, the observed release rates were inversely dependent on temperature and salinity, ranging from 160 ..mu..Ci/day for cold fresh water to 1.4 ..mu..Ci/day for warm sea water. The total releases, including the chamber residues, show… more
Date: December 1, 1983
Creator: Patterson, J. H.; Steinkruger, F. J.; Matlack, G. M.; Heaton, R. C.; Coffelt, K. P. & Herrera, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fission-gas-bubble mobility in oxide fuel: a critical analysis

Description: The available volatile fission product release data has confirmed the general viability of the scaling model of volatile fission product release in which the fractional release rates of the volatile fission products scale as that of the fission gas. The question of whether fission gas bubbles can move sufficiently fast to be a significant mechanism responsible for fission gas release from the fuel is considered. The mean jump distance per jump of the hopping process in gas bubble motion is anal… more
Date: August 1, 1983
Creator: Tam, S. W. & Johnson, C. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Si(Li) x-ray detectors with amorphous silicon passivation

Description: Lithium-drifted silicon (Si(Li)) detectors with thin lithium n/sup +/ contacts and amorphous silicon (..cap alpha..-Si) junction passivation are described. These detectors (7 mm thick, 9 cm/sup 2/ area) are intended for use in a six element detector array which is designed to measure trace amounts of plutonium in soil samples. Results are given showing a spectral resolution of approx. 400 eV (FWHM) for the 17.8 keV N/sub p/ L x-rays entering through either these detectors. Measurements on the e… more
Date: October 1, 1983
Creator: Walton, J.T.; Pehl, R.H.; Wong, Y.K. & Cork, C.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Space nuclear safety program. Progress report, July 1983

Description: This technical monthly report covers studies related to the use of /sup 238/PuO/sub 2/ in radioisotope power systems carried out for the Office of Special Nuclear Projects of the US Department of Energy by Los Alamos National Laboratory. Most of the studies discussed here are ongoing. Results and conclusions described may change as the work continues.
Date: November 1, 1983
Creator: Bronisz, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spectrochemical analysis of plutonium using direct current plasma emission spectrometry

Description: One year ago, LLNL was just completing the installation of a Direct Current Plasma (DCP) spectrometer for the analysis of Pu and Pu alloys. The installation was completed in December 1982 and has been utilized regularly for Pu analysis since then. This paper discusses the experience with the instrument and some data demonstrating its performance.
Date: December 3, 1983
Creator: Morris, W.F.; Fadeff, S.K. & Torres, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pu-238 fuel form activities, January 1-31, 1983

Description: This monthly report for /sup 238/Pu Fuel Form Activities has two main sections: SRP-PuFF facility and SRL Fuel Form Activities. The program status, budget information, and milestone schedules are discussed in each main section. The Work Breakdown Structure (WBS) for this program is shown. Only one monthly report per year is processed for EDB.
Date: March 1, 1983
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fine tuning of a measurement control program at the Los Alamos National Laboratory

Description: This paper suggests a revised measurement control program (MCP) for balance at the Los Alamos National Laboratory plutonium facility. The revised MCP is based on an analysis of data taken from June 1981 through August 1983. The most important finding is that significant measurement bias occurs in nearly every balance. An important cause of this bias has been traced to truncation errors, and a detailed discussion of the effects of truncation errors is presented. We also discuss other sources of … more
Date: January 1, 1983
Creator: Goldman, A.S. & Marshall, R.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Gamma-ray detectors for intelligent, hand-held radiation monitors

Description: Small radiation detectors based on HgI/sub 2/, bismuth germanate (BGO), plastic, or NaI(Tl) detector materials were evaluated for use in small, lighweight radiation monitors. The two denser materials, HgI/sub 2/ and BGO, had poor resolution at low-energy and thus performed less well than NaI(Tl) in detecting low-energy gamma rays from bare, enriched uranium. The plastic scintillator, a Compton recoil detector, also performed less well at low gamma-ray energy. Two small NaI(Tl) detectors were su… more
Date: January 1, 1983
Creator: Fehlau, P. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Characterization of Pu-contaminated soils from Nuclear Site 201 at the Nevada Test Site

Description: Distribution and characteristics of Pu-bearing radioactive particles throughout five soil profiles from Nuclear Site (NS) 201 were investigated. Concentrations of /sup 239/ /sup 240/Pu and /sup 241/Am decreased with depth and most of the contamination was contained in the top 5 cm except in profile 4 where it extended to 10 cm. The mean activity ratio of /sup 239/ /sup 240/Pu to /sup 241/Am and its standard error were 5.8 +- 0.3 (N=42). Most of the total radioactivity of the soils was contribut… more
Date: January 1, 1983
Creator: Lee, S. Y.; Tamura, T. & Larsen, I. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Space Nuclear-Safety Program progress report, February 1983

Description: This technical monthly report covers studies related to the use of /sup 238/PuO/sub 2/ in radioisotope power systems carried out for the Office of Special Nuclear Projects of the US Department of Energy by Los Alamos National Laboratory. Most of the studies discussed here are ongoing. Results and conclusions may change as the work continues.
Date: August 1, 1983
Creator: Bronisz, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Isotopic measurements of uranium and plutonium by resonance-ionization mass spectrometry

Description: Isotopic measurements of the elements uranium and plutonium have been carried out using laser-excited resonance ionization mass spectrometry (RIMS). This technique makes use of the high elemental selectivity inherent in the resonance-ionization process which results in complete removal of isobaric (same-mass) interferences. The requirements of the laser system and atomization source will be discussed with emphasis on maximizing the efficiency of temporal overlap, thus increasing the sensitivity… more
Date: January 1, 1983
Creator: Donohue, D.L.; Young, J.P. & Smith, D.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PUREX environmental radiological surveillance - preoperational and operational support program conducted by Pacific Northwest Laboratory

Description: This report describes the radiological environmental sampling program that is being conducted at the US Department of Energy's (DOE) Hanford Site in support of resumed operation of the PUREX fuel processing plant. The report also summarizes preoperational radiological environmental data collected to date. The activities described herein are part of the ongoing Hanford Environmental Surveillance Program, operated by the Pacific Northwest Laboratory (PNL) for the DOE.
Date: October 1, 1983
Creator: Sula, M. J. & Price, K. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Influence of soil biopopulation on migration of waste radionuclides

Description: This paper reports the interpretation of some results obtained when a Maxey Flats burial pit radioactive waste solution was reacted with a Tilsit soil. The influence of a biopopulation on the degree of sorption and on the stability of that system was investigated. The data have been interpreted as follows: the removal of /sup 137/Cs from solution by the soil is essentially complete within a one-hour period and is not influenced by an active biopopulation. The soil studied contains complexers wh… more
Date: January 1, 1983
Creator: Fowler, E. B.; Polzer, W. L. & Essington, E. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Consolidated Fuel-Reprocessing Program. Progress report, April 1 to June 30, 1983

Description: All research and development on fuel reprocessing in the United States is managed under the Consolidated Fuel Reprocessing Program. Technical progress is reported in overview fashion. Conceptual studies for the proposed Breeder Reprocessing Engineering Test (BRET) have continued. Studies to date have confirmed the feasibility of modifying an existing DOE facility at Hanford, Washington. A study to measure the extent of plutonium polymerization during steam-jet transfers of nitric acid solutions… more
Date: August 1, 1983
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Space nuclear safety program, May 1983. Progress report

Description: The studies related to the use of /sup 238/PuO/sub 2/ in radioisotope power systems, pertained to the General-Purpose Heat Source (compatibility and safety verification) and to the Light-Weight Radioisotope Heater units (overpressure and impact tests).
Date: October 1, 1983
Creator: Bronisz, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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