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Modular Isotopic Thermoelectric Generator (MITG) Design and Development, Part A-E. Original was presented at 1983 Intersociety Energy Conversion Engineering Conference (IECEC)

Description: Advanced RTG concepts utilizing improved thermoelectric materials and converter concepts are under study at Fairchild for DOE. The design described here is based on DOE's newly developed radioisotope heat source, and on an improved silicon-germanium material and a multicouple converter module under development at Syncal. Fairchild's assignment was to combine the above into an attractive power system for use in space, and to assess the specific power and other attributes of that design. The resultant design is highly modular, consisting of standard RTG slices, each producing 24 watts at the desired output voltage of 28 volt. Thus, the design could be adapted to various space missions over a wide range of power levels, with little or no redesign. Each RTG slice consists of a 250-watt heat source module, eight multicouple thermoelectric modules, and standard sections of insulator, housing, radiator fins, and electrical circuit. The design makes it possible to check each thermoelectric module for electrical performance, thermal contact, leaktightness, and performance stability, after the generator is fully assembled; and to replace any deficient modules without disassembling the generator or perturbing the others. The RTG end sections provide the spring-loaded supports required to hold the free-standing heat source stack together during launch vibration. Detailed analysis indicates that the present generation of RTGs, using the same heat source modules. There is a duplicate copy of this document. OSTI has a copy of this paper.
Date: April 29, 1983
Creator: Schock, A.
Partner: UNT Libraries Government Documents Department

Analysis of Possible Stratagems for Enhancing the EOM Power of RTGs for the CRAF Mission

Description: Paper presented at the 26th IECEC in Boston, MA August 4-9, 1991. This paper describes the various stratagems investigated and discusses their drawbacks and their effectiveness. The analytical results indicated that a combination of relatively modest RTG modifications that could be implemented in time for the mission could come very close to meeting the CRAF power demand goals specified by JPL. However, since even with the modifications the two RTGs did not provide sufficient margin for possible further growth in power demand, the JPL project team ultimately decided to use 3 RTGs for the CRAF mission also. This had the decisive advantage of eliminating the need for load switching to reduce the power demand peaks. The purpose of this paper is to document the various power enhancement schemes analyzed and their computed effectiveness, for possible future applications. There are three copies in the file.
Date: August 1, 1991
Creator: Schock, Alfred; Or, Chuen T & Noravian, Heros
Partner: UNT Libraries Government Documents Department

Space Exploration and the Benefits to Mankind

Description: Paper presented at the 41st Congress of the International Astronautical Federation in Dresden, GDR in October 1990. This paper analyzes the past challenges of the space program's multi-national cooperative agreements and examines the challenges of the future as we quickly become a global society. Cross Reference ESD-T1.
Date: October 1, 1990
Creator: Moser, T.L.; Freitag, R. & Schneider, W.C.
Partner: UNT Libraries Government Documents Department

Stirling Engine Nodal Analysis Program

Description: A general-purpose program for the nodal analysis of Stirling-cycle devices or other cyclic, regenerative machines is described. It employs finite-difference, explicit-forward solutions, and is readily adaptable to various machine topologies. The machine is divided into specifiable numbers of fluid and solid nodes. The program solves three coupled gas-dynamic differential equations (mass, momentum, and energy balances) for each fluid node, and an energy balance for each solid nod. Interactions between these are represented by heat transfer and fluid friction terms. The kinetic energy of the fluid and the inertial resistance to flow acceleration are accounted for. Leakages through seals and ports are included in the analysis. Special schemes for enhanced mathematical stability and for accelerated convergence to a steady-state cycle are described. The program is applicable to both disciplined-piston and free-piston engines. It can automatically generate very detailed outputs, both tabular and graphic (Eulerian, LaGrangian, and 3-dimensional) to help provide insight and understanding. Extensive illustrations and discussions are presented.
Date: January 1, 1978
Creator: Schock, Alfred
Partner: UNT Libraries Government Documents Department

On the Nature of the Distortion of a GPHS Fueled Capsule Impacted on Various Media at Various Velocities and Under Various Boundary Conditions; Appendix F: Response of the GPHS Module to LH(Sub-2)-LO(Sub-2) Overpressure in Various Shielded and Unshielded Geometries

Description: This body of work represents the parametric investigation of conditions of impact for a GPHS fueled capsule.
Date: August 25, 1987
Creator: Eck, Marshall B & Mukunda, Meera
Partner: UNT Libraries Government Documents Department

Mound Laboratory Plutonium-238 Study Off-Site Analytical Data May-December 1974

Description: Preliminary samples collected from off-site sediment in the Miami-Erie Canal Area near Mound Laboratory indicated that plutonium-238 concentrations are substantially above baseline levels. As a result an extensive sampling and analysis program was performed to determine the plutonium-238 concentrations as a function of depth and location in a drainage ditch, the canal, two ponds, a run-off hollow, a canal overflow creek and the Great Miami River. The plutonium-238 concentration data was used to estimate the total inventory of 238Pu deposited in these waterways, to determine the extent of the contamination, and to evaluate the potential health hazards to the general population of the area. The scope of this report is to present the data collected during this study. Detailed interpretation of the data will be presented in subsequent reports.
Date: March 1, 1975
Creator: Robinson, Bob; Rogers, D. R.; Westendorf, W. H. & Black, H. A.
Partner: UNT Libraries Government Documents Department

An Experimental Shield Test Facility for the Development of Minimum Weight Shields for Compact Reactor Power Systems

Description: Discussions are given of the characteristics of fission-source plate, graphite reactor, and pool-type reactor facilities applicable to development studies of minimum weight shielding materials. Advantages of a proposed SNAP dual-purpose shielding facility are described in terms of a disk-shaped fission-source plate, reactor, and building. A program for the study of advanced shielding materials is discussed for materials and configuations to be evaluted with the fission-source plate, the testing of the prototype at high-power levels, and full-power tests on the actual reactor.
Date: August 7, 1959
Creator: Tomlinson, R. L.
Partner: UNT Libraries Government Documents Department

Evaluation/disposition of observations no. 6-17, 6-18, and 6-22 from site electrical assessment report, 300 area powerhouse and emergency sys.

Description: Disposition of Observations 6-17, 6-18, 6-22 of Site Electrical Assessment Report. Application of generator differential protection, and synchro-check relay rewiring for generators of building 3621-D. In 1990, the WHC Site Electrical Task Group issued a Site Electrical Assessment Report, ``300 Area Powerhouse and Emergency System.`` This report included numerous findings and observations relating to observed deficiencies or opportunities for improvement in maintenance of the inspected electrical systems. The purpose of this letter report is to provide an evaluation and proposed disposition of Observations No. 6-1 7, 6-1 8, and 6-22 of the Site Electrical Assessment Report.
Date: September 30, 1996
Creator: Ahola, E.L.
Partner: UNT Libraries Government Documents Department

Cyberwarfare on the Electricity Infrastructure

Description: The report analyzes the possibility of cyberwarfare on the electricity infrastructure. The ongoing deregulation of the electricity industry makes the power grid all the more vulnerable to cyber attacks. The report models the power system information system components, models potential threats and protective measures. It therefore offers a framework for infrastructure protection.
Date: March 20, 2000
Creator: Murarka, N. & Ramesh, V.C.
Partner: UNT Libraries Government Documents Department


Description: This scope document defines the work scope for accomplishing the design of the GE MS7001H and MS9001H (7H and 9H) combined-cycle power systems under the original ATS Phase 3 DOE Cooperative Agreement No. DE-FC21-95MC31176, and incorporates changes in scope required to convert Phase 3 to the ''restructured'' Phase 3R as defined in Amendment A012 to the Cooperative Agreement.
Date: March 17, 2000
Partner: UNT Libraries Government Documents Department