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Test Pile Reactivity Loss Due to Trichloroethylene

Description: The presence of trichloroethylene in the test pile caused a continual decrease in pile reactivity. A system which removed, purified, and returned 12,000 cfh helium to the pile has held contamination to a negligible level and has permitted normal pile operation.
Date: March 9, 2001
Creator: Plumlee, K. E.
Partner: UNT Libraries Government Documents Department
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Thermal analysis to support decommissioning of the molten salt reactor experiment

Description: As part of the decommissioning process for the Molten Salt Reactor Experiment (MSRE) at Oak Ridge National Laboratory, several thermal-sciences issues were addressed. Apparently a mixture of UF{sub 6} and F{sub 2} had diffused into the upper portion of one charcoal column in the MSRE auxiliary charcoal bed (ACB), leading to radiative decay heating and possible chemical reaction sources. A proposed interim corrective action was planned to remove the water from the ACB cell to reduce criticality … more
Date: June 1996
Creator: Sulfredge, C. D.; Morris, D. G.; Park, J. E. & Williams, P. T.
Partner: UNT Libraries Government Documents Department
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A simplified model of aerosol scrubbing by a water pool overlying core debris interacting with concrete. Final report

Description: A classic model of aerosol scrubbing from bubbles rising through water is applied to the decontamination of gases produced during core debris interactions with concrete. The model, originally developed by Fuchs, describes aerosol capture by diffusion, sedimentation, and inertial impaction. This original model for spherical bubbles is modified to account for ellipsoidal distortion of the bubbles. Eighteen uncertain variables are identified in the application of the model to the decontamination o… more
Date: November 1, 1993
Creator: Powers, D. A. & Sprung, J. L.
Partner: UNT Libraries Government Documents Department
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Progress on the MELCOR code

Description: Sandia has made considerable progress in the past year on the MELCOR code for integrated severe nuclear reactor accident analysis. Actinities for the past year are presented.
Date: December 31, 1995
Creator: Bergeron, K.; Cole, R. Jr.; Elsbernd, A.; Rodriquez, S.; Smith, R. & Leonard, M.
Partner: UNT Libraries Government Documents Department
open access

New Applications of Gamma Spectroscopy: Characterization Tools for D&D Process Development, Inventory Reduction Planning & Shipping, Safety Analysis & Facility Management During the Heavy Element Facility Risk Reduction Program

Description: Novel applications of gamma ray spectroscopy for D&D process development, inventory reduction, safety analysis and facility management are discussed in this paper. These applications of gamma spectroscopy were developed and implemented during the Risk Reduction Program (RPP) to successfully downgrade the Heavy Element Facility (B251) at Lawrence Livermore National Laboratory (LLNL) from a Category II Nuclear Facility to a Radiological Facility. Non-destructive assay in general, gamma spectr… more
Date: January 23, 2006
Creator: Mitchell, M.; Anderson, B.; Gray, L.; Vellinger, R.; West, M.; Gaylord, R. et al.
Partner: UNT Libraries Government Documents Department
open access

Technical bases and user's manual for the prototype of a Suppression Pool Aerosol Removal Code (SPARC)

Description: This code was written to calculate the capture of aerosol particles in the pressure suppression pool (wet well) of a boiling water reactor under hypothetical accident conditions. The code incorporates five aerosol scrubbing models and two thermal-hydraulic models. The scrubbing models describe (1) steam condensation, (2) soluble particle growth in a humid atmosphere, (3) gravitational settling, (4) inertial deposition, (5) diffusional deposition. Mechanical entrainment of pool liquid by breakin… more
Date: May 1, 1985
Creator: Owczarski, P.C.; Schreck, R.I. & Postma, A.K.
Partner: UNT Libraries Government Documents Department
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Design procedure for sizing a submerged-bed scrubber for airborne particulate removal

Description: Performance correlations to design and operate the submerged bed scrubber were developed for various applications. Structural design procedure outlined in this report focuses on off-gas scrubbing for HLW vitrification applications; however, the method is appropriate for other applications.
Date: April 1, 1987
Creator: Ruecker, C.M. & Scott, P.A.
Partner: UNT Libraries Government Documents Department
open access

A simplified model of aerosol removal by containment sprays

Description: Spray systems in nuclear reactor containments are described. The scrubbing of aerosols from containment atmospheres by spray droplets is discussed. Uncertainties are identified in the prediction of spray performance when the sprays are used as a means for decontaminating containment atmospheres. A mechanistic model based on current knowledge of the physical phenomena involved in spray performance is developed. With this model, a quantitative uncertainty analysis of spray performance is conducte… more
Date: June 1, 1993
Creator: Powers, D.A. (Sandia National Labs., Albuquerque, NM (United States)) & Burson, S.B. (Nuclear Regulatory Commission, Washington, DC (United States). Div. of Safety Issue Resolution)
Partner: UNT Libraries Government Documents Department
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