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Light weight radioisotope heater unit (LWRHU): a technical description of the reference design

Description: The Light Weight Radioisotope Heater Unit (LWRHU), a new radioisotope heater unit for use in space missions, is a /sup 238/PuO/sub 2/-fueled unit designed to provide a thermal watt in dispersed locations on a spacecraft. The LWRHU is required to maintain the temperature of a component at a level where the component will function reliably in space. Two major constraints are placed on the unit's design; it must be as light as possible and must provide enough protection to immobilize the plutonium… more
Date: January 1, 1982
Creator: Tate, R.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Space nuclear safety and fuels program, November 1981

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 Coordination and Special 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. Published reference of the results cited in this report should not be made without the explicit permission of the person in charge of th… more
Date: April 1, 1982
Creator: Bronisz, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Safety analysis report for the /sup 238/PuO/sub 2/ fuel form facility

Description: The Plutonium Fuel Form (PuFF) Facility has been constructed at the Savannah River Plant to manufacture 30 to 60 kg/yr of /sup 238/Pu fuel forms for space power applications. This facility is located in the existing Building 235-F near the geographical center of the Savannah River Plant (SRP) site. Pilot production is scheduled to begin in July 1977, with full-scale production in April 1978. The process line of the facility consists of nine separate, interconnected shielded cells; five shielded… more
Date: August 1, 1977
Creator: Angerman, C.L.; Bickford, D.F.; Gould, T.H. Jr. & Smith, P.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pu-238 fuel form activities, June 1-30, 1980

Description: This monthly report for Pu-238 Fuel Form Activities has two main sections: SRP-PuFF Pu-238 Fuel Form Production Processes and SRL Pu-238 Fuel Form Research and Development. The program status, budget information, and milestone information are discussed in each main section. The Work Breakdown Structures (WBS) for this program is outlined. Only one monthly report per year is processed for EDB.
Date: July 18, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design evolution and verification of the general-purpose heat source

Description: The General-Purpose Heat Source (GPHS) is a radioisotope heat source for use in space power systems. It employs a modular design, to make it adaptable to a wide range of energy conversion systems and power levels. Each 250 W module is completely autonomous, with its own passive safety provisions to prevent fuel release under all abort modes, including atmospheric reentry and earth impact. Prior development tests had demonstrated good impact survival as long as the iridium fuel capsules retained… more
Date: unknown
Creator: Schock, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Space nuclear safety and fuels program, December 1981

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 Coordination and Special 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. Published reference of the results cited in this report should not be made without the explicit permission of the person in charge of th… more
Date: April 1, 1982
Creator: Bronisz, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Total and spontaneous fission half-lives for uranium and plutonium nuclides

Description: Several reported experiments have been reanalyzed and recommended values are presented for /sup 232,233,234,235,236,238/U and for /sup 236,238,239,240,241,242,244/Pu. These values improve upon previous preliminary estimates of both the half-lives and the standard deviations. 120 refs., 23 tabs. (WRF)
Date: January 1, 1985
Creator: Holden, Norman E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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/sup 238/Pu fuel-form processes. Quarterly report, January-March 1982

Description: Progress in the Savannah River /sup 238/Pu Fuel Form Program is summarized. Analytical studies of weld quench cracking in DOP-26 iridium alloy-clad vent sets are reported. Cracks that occur in the arc quench region of the girth welds on DOP-26 iridium alloy-clad vent sets (CVS) have been a problem in production of general-purpose heat sources (GPHS) in the Savannah River Plant (SRP) Plutonium Fuel Form (PuFF) Facility. Previous analytical work has shown that alloy grain boundaries in cracks hav… more
Date: July 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Environmental radiation safety source term evaluation program

Description: Plutonium-238 is currently used in the form of a pure refractory oxide as a power source on a number of space vehicles that have already been or will be launched during the next few years. Although the sources are designed and built to withstand re-entry into the earth's atmosphere and impact with the earth's surface without releasing any plutonium, the possibility of such an event can never be absolutely excluded. Three separate tasks were undertaken in this study. The interactions between soi… more
Date: April 1, 1977
Creator: Moss, O. R.; Filipy, R. E.; Cannon, W. C. & Craig, D. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Resin bead methodology as applied to fuel burn-up and fissile inventories

Description: A new technique has been developed that allows acquisition of samples from matrices difficult to access. While the examples given in this paper are from the nuclear field, the technique is readily modified to address other areas. The technique involves obtaining samples on resin beads; each bead then comprises a sample for mass spectrometric analysis. Through the application of isotope dilution, concentrations of the target elements can be obtained in addition to their isotopic compositions. Ex… more
Date: January 1, 1986
Creator: Smith, D. H.; Walker, R. L. & Carter, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Thermodynamic study of the MWG system/components and measurement of the oxygen partial pressure in the heat source capsule

Description: A thermodynamic study of the Milliwatt Generator heat source capsule was performed to determine the effects of the oxide fuel on container materials at elevated temperatures in order to evaluate the factors affecting embrittlement of T-111 alloy. The study indicates that relatively slow oxidation of the T-111 of the capsule occurs during pretreatment. Yttrium added to the /sup 238/PuO/sub 2/ fuel charge is functioning in its designed role as an oxygen getter and is stabilizing at an O/Pu ratio … more
Date: June 23, 1980
Creator: David, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of ultrafiltration and inorganic adsorbents for reducing volumes of low-level and intermediate-level liquid waste: April--June 1977

Description: Ultrafication (UF) membranes have demonstrated 90 to 98% rejection of gross alpha in laboratory tests. In the treatment of laundry wastes, rejection of activity ranged from 98 to 99.9% gross alpha. The pilot UF system was installed and started up. Flux decline curves and volume reduction performance were determined. Volume reductions of 210 : 1 were achieved at flux rates of 1.1 gal/min (system is rated at 2 to 3 gal/min, 90% recovery) at activity rejection of 99.94% gross alpha. Adsorbent stud… more
Date: November 14, 1977
Creator: Koenst, J. W.; Herald, W. R. & Roberts, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Deposition of air-borne /sup 238/Pu near a chemical separation facility

Description: Three methods were compared to measure deposition of /sup 238/Pu released from a chemical separation facility at the Savannah River Plant, Aiken, SC. The following methods were used: adhesive paper; a collector of rain and dryfall; and soil samples. Excellent agreement among the three methods was found. The measured deposition for the particular source term and meteorological conditions at the Savannah River Plant is described by y proportional to x/sup -1.36/ where y is the pCi of /sup 238/Pu … more
Date: January 1, 1982
Creator: Horton, J.H. & Gay, D.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Testing and evaluation of doubly impacted simulant-fueled Milliwatt Generator heat sources

Description: As part of the Milliwatt Generator (MWG) Program, 12 simulant-fueled heat sources were fabricated double impact tested, and evaluated at Mound. Ten assemblies were tested at approx. 80 m/sec, and two were tested at approx. 105 m/sec. None of the strength members were breached; therefore, no fuel would have been released as a result of double impacts at the velocities and orientations tested at 450/sup 0/C. There was little difference in results for duplicate tests conducted approx. 80 and appro… more
Date: April 9, 1982
Creator: Teaney, P. E.; Cartmill, W. B. & Wise, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radionuclide distributions and migration mechanisms at shallow land burial sites. 1982 annual report of research investigations on the distribution, migration and containment of radionuclides at Maxey Flats, Kentucky

Description: Subsurface waters at Maxey Flats are anoxic, have a high alkalinity and contain high concentrations of ferrous, sulfide and ammonium ions and organic carbon. The trench leachates are extremely variable in composition. Prominent radionuclides include /sup 3/H, /sup 60/Co, /sup 90/Sr, /sup 137/Cs, /sup 238/ /sup 239/ /sup 240/Pu and /sup 241/Am. A wide spectrum of dissolved organic compounds is present in the leachates, including EDTA, polar organics and decomposition products from the waste form… more
Date: February 1, 1984
Creator: Kirby, L.J. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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/sup 238/PuO/sub 2//Mo-50 wt% Re compatibility at 800 and 1000/sup 0/C

Description: The compatibility of Mo-50 wt % Re with /sup 238/PuO/sub 2/ was investigated after heat treatments of up to 720 days at 800/sup 0/C and 180 days at 1000/sup 0/C. At 800/sup 0/C, a 1-..mu..m thick, continuous layer of molybdenum oxide resulted. At 1000/sup 0/C, the oxide reaction product contained some plutonium and did not appear continuous. At 1000/sup 0/C, a layer of intermetallic formed at the Mo-Re edge, beneath the oxide layer, creating a barrier between the Mo-50 wt % Re and the /sup 238/… more
Date: July 18, 1980
Creator: Schaeffer, D. R. & Teaney, P. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reactivity coefficients of heavy isotopes in LASL's fast critical assemblies

Description: A systematic investigation of heavy isotope behavior in the Pajarito fast-neutron critical assemblies is described. Included will be central reactivity coefficient measurements and fission rate measurements in natural uranium reflected plutonium and 93%-enriched uranium metal assemblies and in Big Ten, a depleted uranium reflected 10%-enriched uranium metal assembly.
Date: January 1, 1978
Creator: Byers, C. C.; Hansen, G. E.; Koelling, J. J.; Plassmann, E. A. & Smith, D. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A new concept for accelerator driven transmutation of nuclear wastes

Description: A new concept for an accelerator-driven transmutation system is described. The central feature of the concept is generation of intense fluxes of thermal neutrons. In the system all long-lived radionuclides comprising high-level nuclear waste can be transmuted efficiently. Transmutation takes place in a unique, low material inventory environment. Presently two principal areas are being investigated for application of the concept. The first is associated with cleanup of defense high-level waste a… more
Date: January 1, 1991
Creator: Arthur, E. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Leaching behavior of particulate plutonium oxide

Description: Different size cuts of /sup 238/PuO/sub 2/ particles were mixed with deionized water at two temperatures in a shaker bath. The gross plutonium concentration in the water was measured, as well as that portion of the plutonium retained on a 0.1-..mu..m pore filter. The concentration of the plutonium released was primarily a function of the surface area of the particles. The release rate of plutonium into the water for the size cut with particles having diameters between 30 and 20 ..mu..m was 3 ng… more
Date: August 1, 1985
Creator: Kosiewicz, S. T. & Heaton, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plutonium isotopic analysis system for plutonium samples enriched in sup 238 Pu in EP 60/61 and fuel-clad containers

Description: This two-part manual describes and provides instructions for installing software for Lawrence Livermore National Laboratory's Pu-238 isotopic analysis system built for Westinghouse Hanford's Radioisotope Power Systems Facility. Part 1 contains descriptions of all the subroutines found in the main software program, WHC.ASY238. Also provided in this part are general instructions for modifying a subroutine and specific directions for relinking the WHC.ASY238 program, as well as information on the … more
Date: July 1, 1991
Creator: Ruhter, W. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mound's decommissioning experience, tooling, and techniques

Description: Monsanto Research Corporation (MRC), which operates Mound for the Department of Energy (DOE), has been decommissioning radioactively contaminated facilities since 1949. We are currently decommissioning three plutonium-238 contaminated facilities (approximately 50,000 ft/sup 2/) that contained 1100 linear ft of gloveboxes; 900 linear ft of conveyor housing; 2650 linear ft of dual underground liquid waste lines; and associated contaminated piping, services, equipment, structures, and soil. As of … more
Date: January 1, 1982
Creator: Combs, A. B.; Davis, W. P.; Elswick, T. C.; Garner, J. M. & Geichman, J. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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