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Comprehensive Self-Assessment and Upgrade Program (CSAUP) performance objectives and criteria

Description: The US Department of Energy (DOE) has placed strong emphasis on a new way of doing business patterned on the lessons learned in the nuclear power industry after the accident at Three Mile Island Unit 2. The new way relies on strict adherence to policies and procedures, a greatly expanded training program, and much more rigor and formality in operations. Another key element is more visible oversight by upper management and auditability by DOE. Although the Chemical Technology Division (Chem Tech) has functioned in a safe manner since its beginning, the policies and methods of the past are no longer appropriate. Therefore, in accordance with these directives, Chem Tech is improving its operational performance by making a transition to greater formality in the observance of policies and procedures and a more deliberate consideration of the interrelationships between organizations at ORNL. This transition to formality is vitally important because both our staff and our facilities are changing with time. For example, some of the inventors and developers of the processes and facilities in use are now passing the torch'' to the next generation of Chem Tech staff. Our facilities have also served us well for many years, but the newest of these are now over 20 years old All have increasing needs of refurbishment and repair, and some of the older ones need to be replaced. This procedure, based on the lessons learned in the nuclear industry, will enhance Chem Tech's operational performance in some important ways, while maintaining the special factors that have allowed the Chem Tech staff to be creative and successful in the RD D activities.
Date: May 1, 1990
Partner: UNT Libraries Government Documents Department

Gamma-Free Neutron Detector Based upon Lithium Phosphate Nanoparticles

Description: A gamma-free neutron-sensitive scintillator is needed to enhance radiaition sensing and detection for nonproliferation applications. Such a scintillator would allow very large detectors to be placed at the perimeter of spent-fuel storage facilities at commercial nuclear power plants, so that any movement of spontaneously emitted neutrons from spent nuclear fuel or weapons grade plutonium would be noted in real-time. This task is to demonstrate that the technology for manufacturing large panels of fluor-doped plastic containing lithium-6 phosphate nanoparticles can be achieved. In order to detect neutrons, the nanoparticles must be sufficiently small so that the plastic remains transparent. In this way, the triton and alpha particles generated by the capture of the neutron will result in a photon burst that can be coupled to a wavelength shifting fiber (WLS) producing an optical signal of about ten nanoseconds duration signaling the presence of a neutron emitting source.
Date: August 28, 2007
Creator: Wallace, Steven
Partner: UNT Libraries Government Documents Department

REVIEW OF POWER AND HEAT REACTOR DESIGNS. Domestic and Foreign

Description: Unclassified information from domestic and foreign literature from January 1952 through September 1963 is compiled. Design characteristics and current information on the status of the individual designs are given, along with references for the associated literature. SNAP systems, proposed reactors, and chemonuclear and test reactors with characteristics similar to power reactors are included. The designs are indexed by name, location, type, and some special characteristics. (D.C.W.)
Date: October 1, 1963
Creator: Appleby, E.R., comp
Partner: UNT Libraries Government Documents Department

Tritium ion beam for an intense neutron source, INS

Description: The INS facility has been proposed to provide a neutronic environment similar to that anticipated in a fully operational fusionpower reactor. The neutron generator will produce an intense flux of 14-MeV neutrons> 10/sup 14/ neutrons/cm/sup 2/ sec from the collision of two intersecting beams, one of 1.1 A of 270-keV tritium ions and the other of a supersonic jet of deuterium molecules. Using either the pure 14-MeV primary-neutron spectrum or by tailoring the spectrum with appropriate moderators, crucial radiationdamage effects can be explored and better understood. To obtain a multi-ampere tritium-ion beam for the INS, an ion source that can operate continuously with a high ion-current density over a very large plasma ion-extraction area is required. The ion source must be designed to provide a quiescent plasma that is uniform in density over a relatively flat extraction surface. Such extraction will sesure a low beam emittance and manageable beam optics. An annular duoplasmatron is described that is designed to provide long-life reliability (> 2000 hrs), a high gas efficiency (> 20%), and high-quality beam generation (normalized emittance ~ 0.3 cmmrad). The beam transport system, including an accelerating column, bending magnets, and quadrupole focusing magnets, must be designed to transport the tritium ions to a well-defined target area without loss of appreciable power (the beam contains ~ 1/ 3 MW). Because of radioactive hazards in the handling of the tritium, and to minimize the tritium inventory, the vacuum system for the ion source and beam transpont must be capable of recycling the tritium using closed-loop techniques. (auth)
Date: January 1, 1973
Creator: Emigh, E.R.
Partner: UNT Libraries Government Documents Department

Solid state circuit breaker. Technological spinoff report

Description: A solid state circuit breaker was designed using the SCEPTRE circuit analysis program. The experimental circuit assembled worked satlsfactorily for overloads up to 200 percent. This device would be useful in some special applications where fast operation in the microsecond range would be an advantage. (auth)
Date: February 1, 1974
Creator: Elmer, E.R.
Partner: UNT Libraries Government Documents Department

EVALUATION OF SURFACE ATTACHED THERMOCOUPLES DURING FORCED CONVECTION HEAT TRANSFER

Description: Metal-clad thermocouples with a flat (spade) tip were used to measure the temperature of a 0.030-in.-thick metal plate acting as a forced convection heat transfer surface. The thermocouples were found to change the temperature of the plate at the point of attachment by 40 percent of the temperature difference between fluid and plate. This value was found to be independent of fluid velocity, heat flux, and fluid temperature. A heat transfer model of the thernrocouple was developed and analyzed to determine the effective fin height'' of the thermocouple at four test conditions. A correlation is presented between the average heat transfer coefficient of the system and the effective fin height'' of the thermocouple. The model and the correlation may be used to predict the calibration factor for other systems of similar thermocouples during either heating or cooling if the heat transfer coefficient is known. An evaluation of brazing and resistance spot welding for attaching the thermocouples to the plate was made. Resistance spot welding was found to give a weak attachment with poor thermal contact between plate and thermocouple. Brazing was found to give a strong attachment with excellent thermal contact between plate and thermocouple. (auth)
Date: June 17, 1963
Creator: Oetken, E.R.
Partner: UNT Libraries Government Documents Department

FURNACE BRAZING OF ZIRCALOY

Description: The furnace brazing of Zircaloy or Zircaloy-clad nuclear reactor components was investigated. The strength and corrosion resistance of brazements were determined and techniques were developed for preplacing the brazing alloy to prevent contamination and to maintain dimensional stability during brazing. Brazements of high strength and adequate dimensional accuracy were produced, but the brazing cycles impaired the corrosion resistance of Zircaloy in high-temperature steam and water. (auth)
Date: January 1, 1959
Creator: Slaughter, E.R.
Partner: UNT Libraries Government Documents Department

Uranium isotope separation in the solid state. Final report for period ending September 30, 1978

Description: The final results of an investigation on the isotope separation of uranium in the solid state are presented in this report. The feasibility of separating uranium isotopes using the proposed system based on uranium borohydride (borodeuteride) in a low temperature mixed crystal has been determined. The first section of the report summarizes the background material relating to this work which includes: a calculation of isotope shifts (borodeuteride), details on the two-step, two-photon spectroscopic isotope separation technique, and a brief overview of the method and equipment used for separating uranium isotopes in the solid state. The second section concerns the experimental details of the present work performed in the laboratory. Representative spectroscopic data obtained in this investigation are presented and discussed in the third section. Finally, the report is concluded with recommendations for further investigations on the uranium borohydride (borodeuteride) system for isotope separation.
Date: September 1, 1978
Creator: Bernstein, E.R.
Partner: UNT Libraries Government Documents Department

Anion Exchange Recovery of Plutonium From Reduction Residues

Description: An anion exchange process was demonstrated for the recovery of Pu from waste produced in the reduction of Pu salts to the metal. Pu in a highiy salted 6M nitric acid solution, derived from the dissolution of slag and crucible waste, was separated from impurities by absorbing the Pu(IV) nitrate complex on the anion exchange resin and subsequentiy eluting with dilute nitric acid. A flowsheet for plant operation is presented. (auth)
Date: February 1, 1960
Creator: Russell, E.R.
Partner: UNT Libraries Government Documents Department

Supersymmetric Higgs Boson Pair Production: Discovery Prospects at Hadron Colliders

Description: We study the potential of hadron colliders in the search for the pair production of neutral Higgs bosons in the framework of the Minimal Supersymmetric Standard Model. We perform a detailed signal and background analysis, working out efficient kinematical cuts for the extraction of the signal. The important role of squark loop contributions to the signal is re-emphasized. If the signal is sufficiently enhanced by these contributions, it could even be observable at the next run of the upgraded Tevatron collider in the near future. At the LHC the pair production of light and heavy Higgs bosons might be detectable simultaneously.
Date: September 15, 1999
Creator: Mizukoahi, Jose K.
Partner: UNT Libraries Government Documents Department

Hadronic Charmless B Decays at the SLD

Description: Rare decays of beauty particles were studied in several two-body exclusive hadronic charmless modes using the 19.4 pb<sup>-1</sup> Z-pole data collected with the SLD detector at SLAC from 1993 to 1998. These decays are mediated by both tree level b {yields} u and one-loop penguin b {yields} s, d transitions. Upper limits for the branching ratios are set for the investigated modes B<sub>s</sub>, B<sub>0</sub> {yields} P<sup>+</sup>P<sup>-</sup>, B<sup>+</sup> {yields} V P<sup>+</sup> and B<sub>s</sub>, B<sup>0</sup> {yields} V V , where the pseudoscalar particle P<sup>+</sup> is either {pi}<sup>+</sup> or K<sup>+</sup> and the vector particle V is either {rho}<sup>0</sup>, K<sup>* 0</sup> or {phi}. Using an event selection algorithm consisting of a set of hard cuts combined with a set of discriminator functions, the efficiencies range between 24% and 37% with near zero background.
Date: September 2, 1999
Creator: Reinertsen, Per L
Partner: UNT Libraries Government Documents Department

The Next Linear Collider Test Accelerator's RF Pulse Compression and Transmission Systems

Description: The overmoded rf transmission and pulsed power compression system for SLAC's Next Linear Collider (NLC) program requires a high degree of transmission efficiency and mode purity to be economically feasible. To this end, a number of new, high power components and systems have been developed at X-band, which transmit rf power in the low loss, circular TE01 mode with negligible mode conversion. In addition, a highly efficient SLED-II* pulse compressor has been developed and successfully tested at high power. The system produced a 200 MW, 250 ns wide pulse with a near-perfect flat-top. In this paper we describe the design and test results of the high power pulse compression system using SLED-II.
Date: February 24, 1999
Creator: Tantawi, Sami
Partner: UNT Libraries Government Documents Department