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The development and evaluation of water-mist fire extinguishing systems

Description: Fire protection for underfloor space is primarily provided by Halon 1301 which has proven to be very effective. However, due to the link between halons and the possible depletion of the stratospheric ozone layer, plans have been implemented to eventually phase out Halon 1301 and 1211. In September 1987 the Montreal Protocol concerning chlorofluorocarbons (CFC) and halons was signed by the United States, the European Economic Community, and 23 other nations. The Montreal Protocol calls for freez… more
Date: August 1, 1994
Creator: Beason, D. G. & Staggs, K. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Brines formed by multi-salt deliquescence

Description: The FY05 Waste Package Environment testing program at Lawrence Livermore National Laboratory focused on determining the temperature, relative humidity, and solution compositions of brines formed due to the deliquescence of NaCl-KNO{sub 3}-NaNO{sub 3} and NaCl-KNO{sub 3}-NaNO{sub 3}-Ca(NO{sub 3}){sub 2} salt mixtures. Understanding the physical and chemical behavior of these brines is important because they define conditions under which brines may react with waste canister surfaces. Boiling poin… more
Date: November 4, 2005
Creator: Carroll, S; Rard, J; Alai, M & Staggs, K
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of an air cleaning system for dissolving high explosives from nuclear warheads

Description: We have been developing a workstation for the removal of high explosive (HE) from nuclear warheads using hot sprays of dimethyl sulfoxide (DMSO) to dissolve the HE> An important component of the workstation is the air cleaning system tat is used to contain DMSO aerosols and vapor and radioactive aerosols. The air cleaning system consists of a condenser to liquefy the hot DMSO vapor, a demister pad to remove most of the DMSO aerosol, a HEPA filter, an activated carbon filter and a final HEPA fil… more
Date: February 1, 1997
Creator: Bergman, W.; Wilson, K.; Staggs, K. & Wapman, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fire testing of 55 gallon metal waste drums for dry waste storage

Description: The primary goal of this test program was to conduct a series of fire test to provide information on the fire performance of 55 gallon metal waste drums used for solid waste disposal at Department Of Energy (DOE) facilities. This program was limited in focus to three different types of 55 gallon drums, one radiant heat source, and one specific fire size. The initial test was a single empty 55 gallon drum exposed to a standard ASTME-119 time temperature curve for over 10 minutes. The full scale … more
Date: July 1, 1993
Creator: Hasegawa, H. K.; Staggs, K. J. & Doughty, S. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fire tests to evaluate the potential fire threat and its effects on HEPA filter integrity in cell ventilation at the Oak Ridge National Laboratory, Building 7920

Description: As a result of a DOE (Tiger Team) Technical Safety Appraisal (November 1990) of the Radiochemical Engineering Development Center (REDC), ORNL Building 7920, a number of fire protection concerns were identified. The primary concern was the perceived loss of ventilation system containment due to the thermal destruction and/or breaching of the prefilters and/or high-efficiency particulate air filters (HEPA `s) and the resultant radioactive release to the external environment. The following report … more
Date: December 1, 1992
Creator: Hasegawa, H. K.; Staggs, K. J. & Doughty, S. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Are Published Minimum Vapor Phase Spark Ignition Energy Data Valid?

Description: The use of sprayed flammable fluids as solvents in dissolution and cleaning processes demand detailed understanding of ignition and fire hazards associated with these applications. When it is not feasible to inert the atmosphere in which the spraying process takes place, then elimination of all possible ignition sources must be done. If operators are involved in the process, the potential for human static build-up and ultimate discharge is finite, and it is nearly impossible to eliminate. The s… more
Date: November 21, 2001
Creator: Staggs, K J; Alvares, N J & Greenwood, D W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Boiling Temperature and Reversed Deliquescence Relative Humidity Measurements for Mineral Assemblages in the NaCl + NaNO3 + KNO3 + Ca(NO3)2 + H2O System

Description: Boiling temperature measurements have been made at ambient pressure for saturated ternary solutions of NaCl + KNO{sub 3} + H{sub 2}O, NaNO{sub 3} + KNO{sub 3} + H{sub 2}O, and NaCl + Ca(NO{sub 3}){sub 2} + H{sub 2}O over the full composition range, along with those of the single salt systems. Boiling temperatures were also measured for the four component NaCl + NaNO{sub 3} + KNO{sub 3} + H{sub 2}O and five component NaCl + NaNO{sub 3} + KNO{sub 3} + Ca(NO{sub 3}){sub 2} + H{sub 2}O mixtures, wh… more
Date: December 1, 2005
Creator: Rard, J A; Staggs, K J; Day, S D & Carroll, S A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of flammable liquid storage wooden cabinets for chemical laboratories

Description: A fire hardened wooden cabinet was developed for the storage of flammable liquids for LLNL Bldg. 151 nuclear chemistry laboratories. The new cabinet requirements were to fit into existing cabinet spaces, match existing cabinets in appearance, and meet the National Fire Protection Association Flammable and Combustible Liquids Code. A standard test apparatus was developed to produce the required fire exposure necessary to evaluate existing cabinets and new designs. The final design was a cabinet … more
Date: November 1, 1993
Creator: Staggs, K. J.; Hasegawa, H. K.; Doughty, S. M. & Barr, J. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaporative Concentration of 100x J13 Ground Water at 60% Relative Humidity and 90C

Description: In these experiments we studied the behavior of a synthetic concentrated J13 solution as it comes in contact with a Ni-Cr-Mo-alloy selected for waste canisters in the designated high-level nuclear-waste repository at Yucca Mountain, Nevada. Concentrated synthetic J13 solution was allowed to drip slowly onto heated test specimens (90 C, 60% relative humidity) where the water moved down the surface of the specimens, evaporated and minerals precipitated. Mineral separation or zoning along the evap… more
Date: December 4, 2003
Creator: Staggs, K; Maureen Alai,; Hailey, P; Carroll, S A; Sutton, M & Nguyen, Q A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Alloy 22 Localized Corrosion Susceptibility In Aqueous Solutions Of Chloride And Nitrate Salts Of Sodium And Potassium At 110 - 150?C

Description: Alloy 22 (a nickel-chromium-molybdenum-tungsten alloy) is being investigated for use as the outer barrier of waste containers for a high-level nuclear waste repository in the thick unsaturated zone at Yucca Mountain, Nevada. Experiments were conducted to assess crevice corrosion of Alloy 22 in de-aerated aqueous solutions of chloride and nitrate salts of potassium and sodium in the temperature range 110-150 C (some limited testing was also conducted at 90 C). Electrochemical tests were run in n… more
Date: January 17, 2006
Creator: Felker, S; Hailey, P D; Lian, T; Staggs, K J & Gdowski, G E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Localized Corrosion Susceptibility Of Alloy 22 In Na-K-Cl_NO3 Brines At 110 To 150?C

Description: Electrochemical cyclic potentiodynamic polarization experiments were conducted to assess crevice corrosion of Alloy 22 in de-aerated aqueous solutions of chloride and nitrate salts of potassium and sodium in the temperature range 110-150 C. The tests were run in neutral and slightly acidic aqueous solutions. The Alloy 22 specimens were multiple creviced weld prisms. No evidence of crevice corrosion was observed in the range 125-150 C. In the 120 to 160 C temperature range, the anionic concentra… more
Date: March 31, 2006
Creator: Lian, T; Felker, S J; Hailey, P D; Staggs, K J & Gdowski, G E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemical Environment at Waste Package Surfaces in a High-Level Radioactive Waste Repository

Description: We have conducted a series of deliquescence, boiling point, chemical transformation, and evaporation experiments to determine the composition of waters likely to contact waste package surfaces over the thermal history of the repository as it heats up and cools back down to ambient conditions. In the above-boiling period, brines will be characterized by high nitrate to chloride ratios that are stable to higher temperatures than previously predicted. This is clearly shown for the NaCl-KNO{sub 3} … more
Date: May 26, 2005
Creator: Carroll, S; Alai, M; Craig, L; Gdowski, G; Hailey, P; Nguyen, Q A et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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