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A benchmark-problem specification and calculation using SENSIBL, a one- and two-dimensional sensitivity and uncertainty analysis code of the AARE system

Description: The lack of suitable benchmark problems makes it difficult to test sensitivity codes with a covariance library. A benchmark problem has therefore been defined for one- and two-dimensional sensitivity and uncertainity analysis codes and code systems. The problem, representative of a fusion reactor blanket, has a simple, three-zone )tau)-z geometry containing a D-T fusion neutron source distributed in a central void region surrounded by a thick /sup 6/LiH annulus. The response of interest is the … more
Date: January 1, 1988
Creator: Muir, D. W.; Davidson, J. W.; Dudziak, D. J.; Davierwalla, D. M.; Higgs, C. E. & Stepanek, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy Program annual report

Description: The national economy is particularly dependent on efficient electrical generation and transportation. Electrical demand continues to grow and will increasingly rely on coal and nuclear fuels. The nuclear power industry still has not found a solution to the problem of disposing of the waste produced by nuclear reactors. Although coal is in ample supply and the infrastructure is in place for its utilization, environmental problems and improved conversion processes remain technical challenges. In … more
Date: February 1, 1988
Creator: Borg, I.Y. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coarse-node computations with an adaptive node structure

Description: The analysis with COMMIX of liquid metal reactor (LMR) intermediate heat exchanger (IHX) transients that are characterized by low flows, and especially imbalanced low flows, shows that if a coarse-node structure is used the predicted temperatures are significantly different than those given by a fine-node structure. If a fine-node structure is used, for problems that involve a large part of the plant, the computation time becomes excessive. This paper presents an improved version of an adaptive… more
Date: January 1, 1988
Creator: Tzanos, C.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Full-wave calculations in flux coordinates for toroidal geometry

Description: A new 2-D full-wave code, HYPERION, employing a poloidal and toroidal mode expansion and including the toroidal terms arising in the wave equation has been developed. It is based on the existing modules developed for the MHD stability codes and uses as input the tokamak equilibria calculated with the RSTEQ code. At present the plasma response is described by the collisionally broadened cold plasma conductivity. However, the code is written in straight field line coordinates, this permits the ac… more
Date: January 1, 1988
Creator: Carreras, B. A.; Lynch, V. E.; Jaeger, E. F. & Batchelor, D. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A one-and-a-quarter-dimensional transport code for field-reversed configuration studies: A user's guide for CFRX

Description: A one-and-a-quarter-dimensional transport code, which includes radial as well as some two-dimensional effects for field-reversed configurations, is described. The set of transport equations is transformed to a set of new independent and dependent variables and is solved as a coupled initial-boundary value problem. The code simulation includes both the closed and open field regions. The axial effects incorporated include global axial force balance, axial losses in the open field region, and flux… more
Date: May 1, 1988
Creator: Hsiao, Ming-Yuan; Werley, K.A. & Ling, Kuok-Mee
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tritium module for ITER/Tiber system code

Description: A tritium module was developed for the ITER/Tiber system code to provide information on capital costs, tritium inventory, power requirements and building volumes for these systems. In the tritium module, the main tritium subsystems/emdash/plasma processing, atmospheric cleanup, water cleanup, blanket processing/emdash/are each represented by simple scaleable algorithms. 6 refs., 2 tabs.
Date: January 1, 1988
Creator: Finn, P. A.; Willms, S.; Busigin, A. & Kalyanam, K. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of nuclear models for higher energy calculations

Description: Two nuclear models for higher energy calculations have been developed in the regions of high and low energy transfer, respectively. In the former, a relativistic hybrid-type preequilibrium model is compared with data ranging from 60 to 800 MeV. Also, the GNASH exciton preequilibrium-model code with higher energy improvements is compared with data at 200 and 318 MeV. In the region of low energy transfer, nucleon-nucleus scattering is predominately a direct reaction involving quasi-elastic collis… more
Date: January 1, 1988
Creator: Bozoian, M.; Siciliano, E. R. & Smith, R. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A numerical study of Rayleigh-Taylor instability in aluminum and steel plates

Description: The SCRAM code is applied to the study of Rayleigh-Taylor instability in metal plates, and comparisons of these computer results are made with experimental data for 1100-O aluminum, 6061-T6 aluminum and 304 stainless steel. Various models for the pressure, temperature, and strain-rate dependencies of the flow stress are compared in the computer calculations. The coefficients that are required in these models to give good agreement with the experimental results are generally close to values that… more
Date: March 1, 1988
Creator: Daly, B.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ACE: AMY CDC (Central Drift Chamber) Fast Track Finder

Description: The central drift chamber (CDC) of the AMY detector at the TRISTAN e/sup /+//e/sup /-// collider features its fine granularity and multi-band structure. The tracking software named ACE which makes the most of these features shows an excellent performance for reconstruction of high multiplicity events with highly collimated jets. The obtained reconstruction efficiency is 97% for the particles coming from within 5 cm of the primary vertex with p/sub t/ /approx gt/ 500 MeVc in the simulated hadron… more
Date: January 1, 1988
Creator: Mori, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Incinerator ash dissolution model for the system: Plutonium, nitric acid and hydrofluoric acid

Description: This research accomplished two goals. The first was to develop a computer program to simulate a cascade dissolver system. This program would be used to predict the bulk rate of dissolution in incinerator ash. The other goal was to verify the model in a single-stage dissolver system using Dy/sub 2/O/sub 3/. PuO/sub 2/ (and all of the species in the incinerator ash) was assumed to exist as spherical particles. A model was used to calculate the bulk rate of plutonium oxide dissolution using fluori… more
Date: June 1, 1988
Creator: Brown, E V
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Prediction of the migration of radionuclides to the boundary of a shallow land burial trench

Description: A general model which predicts the source term, radionuclide release rate, as a function of water flow, container degradation rate, waste form leach rate, and radionuclide migration rate from a low-level waste shallow land burial treach is being developed. This paper discusses modeling radionuclide migration, one component of the source term. Simulations of radionuclide transport from a generic shallow land burial trench have been performed for a range of water flow rates, dispersivity values, … more
Date: January 1, 1988
Creator: Sullivan, T.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Freely expanding detonation products: Scaling of rate processes

Description: Using the Los Alamos reactive hydrodynamics code KIVA, calculations have been made to simulate the free expansion of cylinders of detonation products into a high vacuum. The emphasis of this paper is on the scaling of rate processes with cylinder size and initial conditions as a function of position in the expanding mass. The processes considered include diffusion, unimolecular decomposition, biomolecular radical reactions, and vibrational relaxation. The calculations also give time-dependent v… more
Date: January 1, 1988
Creator: Greiner, N. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Assessing waste management systems using reginalt software

Description: A method for assessing management systems for low-level radioactive waste is being developed for US Department of Energy. The method is based on benefit-cost-risk analysis. Waste management is broken down into its component steps, which are generation, treatment, packaging, storage, transportation, and disposal. Several different alternatives available for each waste management step are described. A particular waste management system consists of a feasible combination of alternatives for each s… more
Date: March 1, 1988
Creator: Meshkov, N. K.; Camasta, S. F. & Gilbert, T. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electron ray tracing programs for gun design and beam transport. [None]

Description: Computer simulation of electron and ion sources is made by using a class of computer codes known as gun design programs. In this paper, we shall first list most of the necessary and some optional capabilities of such programs. Then we will briefly note specific codes and/or authors of codes with attention to specialized applications if any. There may be many more such programs in use than are treated here; we are only trying to cover a range of examples, not perform a comprehensive survey.
Date: May 1, 1988
Creator: Herrmannsfeldt, W.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A scoping study of fission product transport from failed fuel during N Reactor postulated accidents

Description: This report presents a scoping study of cesium, iodine, and tellurium behavior during a cold leg manifold break in the N Reactor. More detail about fission product behavior than has previously been available is provided and key parameters that control this behavior are identified. The LACE LA1 test and evidence from the Power Burst Facility Severe Fuel Damage tests are used to test the key model applied to determine aerosol behavior. Recommendations for future analysis are also provided. The pr… more
Date: January 1, 1988
Creator: Hagrman, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geother Evaluation and Improvement: A Progress Report Including Test Cases for Two-Dimensional BWIP (Basalt Waste Isolation Project) Analysis

Description: The objective of the work is to evaluate the GEOTHER code and peform necessary improvements to make it specifically suitable for predicting the environmental conditions of the waste package for the Basalt Waste Isolation Project (BWIP); and to perform resaturation analyses, that is, the analyses of steam formation and condensation, for the repository and waste package using the improved GEOTHER code. This is a progress report to BWIP documenting the status of GEOTHER code testing, evaluation, a… more
Date: March 1, 1988
Creator: Bian, S. H.; Budden, M. J.; Bartley, C. L. & Yung, S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Automated MCNP photon source generation for arbitrary configurations of radioactive materials and first-principles calculations of photon detector responses

Description: A patch to the Los Alamos Monte Carlo code MCNP has been developed that automates the generation of source descriptions for photons from arbitrary mixtures and configurations of radioactive isotopes. Photon branching ratios for decay processes are obtained from national and international data bases and accesed directly from computer files. Code user input is generally confined to readily available information such as density, isotopic weight fractions, atomic numbers, etc. of isotopes and mater… more
Date: March 1, 1988
Creator: Estes, G.P.; Schrandt, R.G. & Kriese, J.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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WASTES: Waste System Transportation and Economic Simulation--Version 2: Technical Reference Manual

Description: The Waste System Transportation and Economic Simulation (WASTES) Technical Reference Manual was written to describe and document the algorithms used within the WASTES model as implemented in Version 2.23. The manual will serve as a reference for users of the WASTES system. The intended audience for this manual are knowledgeable users of WASTES who have an interest in the underlying principles and algorithms used within the WASTES model. Each algorithm is described in nonprogrammers terminology,… more
Date: February 1, 1988
Creator: Sovers, R. A.; Shay, M. R.; Ouderkirk, S. J.; McNair, G. W. & Eagle, B. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On bunch lengthening using the fourth harmonic cavity in the NSLS VUV ring

Description: It has been suggested that the phase of the beam excited voltage in the harmonic cavity can be controlled by detuning its resonant frequency from the beam current harmonic. Unfortunately the detuning needed to flatten the acceleration waveform also corresponds to the region of Robinson instability for the harmonic cavity. Therefore, lengthening the bunch may be followed by large amplitude synchrotron oscillation of the bunch center of mass. Bunch lengthening is discussed in this note from sever… more
Date: February 1, 1988
Creator: Wachtel, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modeling the flow of water in and around shallow burial trenches

Description: Water flow through a generic low-level waste burial trench has been modeled for a vertical cross-section perpendicular to the longitudinal axis of an elongated trenched, using the finite element code, FEMWATER, in two-dimensional vertical mode. The grid consists of 513 nodes and 468 variable-size quadrilateral elements, and the simulation domain is about 56 m (H) )times) 34 m (V). The traench, which is situated in the unsaturated zone, measures approximately 28 m wide and 10 m deep in cross-sec… more
Date: January 1, 1988
Creator: Suen, C.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Uncertainties in source term estimates for a station blackout accident in a BWR with Mark I containment

Description: In this paper, attention is limited to a single accident progression sequence, namly a station blackout accident in a BWR with a Mark I containment building. Identified as an important accident in the draft version of NUREG-1150 a station blackout involves loss of both off-site power and dc power resulting in failure of the diesels to start and in the unavailability of the high pressure injection and core isolation cooling systems. This paper illustrates the calculated uncertainties (Probabilit… more
Date: January 1, 1988
Creator: Lee, M.; Cazzoli, E.; Liu, Y.; Davis, R.; Nourbakhsh, H.; Schmidt, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SPARK Version 1. 1 user manual

Description: This manual describes the input required to use Version 1.1 of the SPARK computer code. SPARK 1.1 is a library of FORTRAN main programs and subprograms designed to calculate eddy currents on conducting surfaces where current flow is assumed zero in the direction normal to the surface. Surfaces are modeled with triangular and/or quadrilateral elements. Lorentz forces produced by the interaction of eddy currents with background magnetic fields can be output at element nodes in a form compatible w… more
Date: January 1, 1988
Creator: Weissenburger, D.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ENDF/B-V cell comparisons and MCNP-3A

Description: This study compares calculated results from the CELL-2 spectrum code to calculated results from the MCNP Monte Carlo code for typical pressurized water reactor (PWR) fuel lattices at elevated temperatures. The MCNP calculations represent the first analysis of commerical fuel lattices by continuous energy Monte Carlo at realistic temperaturs with ENDF/B-V data. Eigenvalue results demonstrate that the two codes agree to within the statistical uncertainty of MCNP. No systematic variations or biase… more
Date: January 1, 1988
Creator: Eich, W. J.; Eisenhart, L. D.; Little, R. C.; Mosteller, R. D. & Chao, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PHOTON: A user's manual

Description: PHOTON has proven very useful in the development of the X17 superconducting wiggler beamline. Its use has determined the shielding required from the wiggler device to the very end of the beamline in the hutches and angiography section. Doses calculated by this program have been compared with experimental results from conventional bending magnet beamline with great success. In each case the program consistently overestimated the dose by factors ranging from 2 to 10. The reason for this overestim… more
Date: January 1, 1988
Creator: Chapman, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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