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in publisher: "Knolls Atomic Power Laboratory"  
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Space Nuclear Power Plant Pre-Conceptual Design Report, For Information

Description: This letter transmits, for information, the Project Prometheus Space Nuclear Power Plant (SNPP) Pre-Conceptual Design Report completed by the Naval Reactors Prime Contractor Team (NRPCT). This report documents the work pertaining to the Reactor Module, which includes integration of the space nuclear reactor with the reactor radiation shield, energy conversion, and instrumentation and control segments. This document also describes integration of the Reactor Module with the Heat Rejection segment… more
Date: January 27, 2006
Creator: Levine, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of a New Method for Analyzing Images: Two-Dimensional Non-Linear Additive Decomposition

Description: This paper documents the application of a new image processing algorithm, two-dimensional non-linear additive decomposition (NLAD), which is used to identify regions in a digital image whose gray-scale (or color) intensity is different than the surrounding background. Standard image segmentation algorithms exist that allow users to segment images based on gray-scale intensity and/or shape. However, these processing techniques do not adequately account for the image noise and lighting variation … more
Date: July 5, 2006
Creator: Zaccaria, M. A.; Drudnoy, D. M. & Stasenko, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Prometheus Reactor I&C Software Development Methodology, for Action

Description: The purpose of this letter is to submit the Reactor Instrumentation and Control (I&C) software life cycle, development methodology, and programming language selections and rationale for project Prometheus to NR for approval. This letter also provides the draft Reactor I&C Software Development Process Manual and Reactor Module Software Development Plan to NR for information.
Date: July 30, 2005
Creator: Hamilton, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Initial Assessment of Environmental Barrier Coatings for the Prometheus Project

Description: Depending upon final design and materials selections, a variety of engineering solutions may need to be considered to avoid chemical degradation of components in a notional space nuclear power plant (SNPP). Coatings are one engineered approach that was considered. A comprehensive review of protective coating technology for various space-reactor structural materials is presented, including refractory metal alloys [molybdenum (Mo), tungsten (W), rhenium (Re), tantalum (Ta), and niobium (Nb)], nic… more
Date: December 15, 2005
Creator: Frederick, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessing the Effects of Radiation Damage on Ni-base Alloys for the Prometheus Space Reactor System

Description: Ni-base alloys were considered for the Prometheus space reactor pressure vessel with operational parameters of {approx}900 K for 15 years and fluences up to 160 x 10{sup 20} n/cm{sup 2} (E > 0.1 MeV). This paper reviews the effects of irradiation on the behavior of Ni-base alloys and shows that radiation-induced swelling and creep are minor considerations compared to significant embrittlement with neutron ,exposure. While the mechanism responsible for radiation-induced embrittlement is not f… more
Date: January 19, 2006
Creator: Angeliu, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Immiscibility in the Nickel Ferrite-Zinc Ferrite Spinel Binary

Description: Immiscibility in the trevorite (NiFe{sub 2}O{sub 4}) - franklinite (ZnFe{sub 2}O{sub 4}) spinel binary is investigated by reacting 1:1:2 molar ratio mixtures of NiO, ZnO and Fe{sub 2}O{sub 3} in a molten salt solvent at temperatures in the range 400-1000 C. Single phase stability is demonstrated down to about 730 C (the estimated consolute solution temperature, T{sub cs}). A miscibility gap/solvus exists below Tcs. The solvus becomes increasingly asymmetric at lower temperatures and extrapolate… more
Date: June 21, 2006
Creator: Ziemniak, SE; Gaddipati, AR; Sander, PC & Rice, SB
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Request for Naval Reactors Comment on Proposed Prometheus Space Flight Nuclear Reactor High Tier Reactor Safety Requirements and for Naval Reactors Approval to Transmit These Requirements to JPL

Description: The purpose of this letter is to request Naval Reactors comments on the nuclear reactor high tier requirements for the PROMETHEUS space flight reactor design, pre-launch operations, launch, ascent, operation, and disposal, and to request Naval Reactors approval to transmit these requirements to Jet Propulsion Laboratory to ensure consistency between the reactor safety requirements and the spacecraft safety requirements. The proposed PROMETHEUS nuclear reactor high tier safety requirements are c… more
Date: April 28, 2005
Creator: Kokkinos, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Temperature-Dependent Diffusion Coefficients from ab initio Computations: Hydrogen in Nickel

Description: The temperature-dependent mass diffusion coefficient is computed using transition state theory. Ab initio supercell phonon calculations of the entire system provide the attempt frequency, the activation enthalpy, and the activation entropy as a function of temperature. Effects due to thermal lattice expansion are included and found to be significant. Numerical results for the case of hydrogen in nickel demonstrate a strong temperature dependence of the migration enthalpy and entropy. Trapping i… more
Date: March 16, 2006
Creator: Wimmer, Erich; Wolf, Walter; Sticht, Jurgen; Saxe, Paul; Geller, Clint; Najafabadi, Reza et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal Conductivity of Ordered Molecular Water

Description: We use molecular dynamics simulation to investigate thermal transport characteristics of water with various degree of orientational and translational order induced by the application of an electric field. We observe that orientational ordering of the water dipole moments has a minor effect on the thermal conductivity. However, electric-field induced crystallization and associated translational order results in approximately a 3-fold increase of thermal conductivity with respect to the base wate… more
Date: February 16, 2006
Creator: Evans, W; Fish, J & Keblinski, P
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessing the Effects of Radiation Damage on Ni-base Alloys for the Prometheus Space Reactor System

Description: Ni-base alloys were considered for the Prometheus space reactor pressure vessel with operational parameters of {approx}900 K for 15 years and fluences up to 160 x 10{sup 20} n/cm{sup 2} (E > 0.1 MeV). This paper reviews the effects of irradiation on the behavior of Ni-base alloys and shows that radiation-induced swelling and creep are minor considerations compared to significant embrittlement with neutron exposure. While the mechanism responsible for radiation-induced embrittlement is not fu… more
Date: April 4, 2006
Creator: Angeliu, T.; Ward, J. & Witter, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Liquid metal Flow Meter - Final Report

Description: Measuring the flow of liquid metal presents serious challenges. Current commercially-available flow meters use ultrasonic, electromagnetic, and other technologies to measure flow, but are inadequate for liquid metal flow measurement because of the high temperatures required by most liquid metals. As a result of the reactivity and high temperatures of most liquid metals, corrosion and leakage become very serious safety concerns. The purpose of this project is to develop a flow meter for Lockheed… more
Date: January 30, 2007
Creator: Andersen C, Hoogendoom S, Hudson B, Prince J, Teichert K, Wood J, Chase K
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Promethus Hot Leg Piping Concept

Description: The Naval Reactors Prime Contractor Team (NRPCT) recommended the development of a gas cooled reactor directly coupled to a Brayton energy conversion system as the Space Nuclear Power Plant (SNPP) for NASA's Project Prometheus. The section of piping between the reactor outlet and turbine inlet, designated as the hot leg piping, required unique design features to allow the use of a nickel superalloy rather than a refractory metal as the pressure boundary. The NRPCT evaluated a variety of hot leg … more
Date: January 24, 2006
Creator: Girbik, AM & Dilorenzo, PA
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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