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in subjects: "Chromium-Nickel Steels"  
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Structural response of reactor-core hexcan subassemblies subjected to dynamic overpressurization under accident conditions

Description: This paper presents a two-dimensional structural analysis for the evaluation of a single core subassembly due to internal overpressure associated with possible failure of fuel pins having high fission gas plenum pressure. Structural models are developed for the subassemblies and their surroundings with emphasis on the critical physical aspects of the problem. With these models the strains, deformations and the extent of permanent damage (plastic strain) to the subassemblies can be assessed. The… more
Date: January 1, 1993
Creator: Pfeiffer, P.A. & Kulak, R.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of temperature and radiation on the nuclear waste glass product consistency leach test

Description: Previous leach studies carried out with monolithic glass samples have shown that glass dissolution rates increase with increasing temperature and may or may not increase on exposure to external gamma radiolysis. In this study we have investigated the effects of temperature (70--1200[degrees]C) and radiation on the dissolution of simulated radioactive waste glasses using the Product Consistency Test (PCT). The PCT is a seven day, crushed glass leach test in deionized water that is carried out at… more
Date: January 1, 1993
Creator: Crawford, C.L. & Bibler, N.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry

Description: Phase transformation and cracking during RT aging of charged, high-purity Fe18Cr12Ni alloy and commerical 304 ss were examined; results show that [epsilon]* (hcp) hydride formed on Fe18Cr12Ni upon charging, and it decomposed rapidly to form first [epsilon] and then [alpha]' martensite. Morphology of fracture surfaces of Fe18Cr12Ni produced by corrosion fatigue in NaCl solutions and in hydrogen was found to be identical. Effort was made to examine the approaches and methodologies used in service… more
Date: January 25, 1993
Creator: Wei, R.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Requirements for characterization of DWPF canister welds and labels, and estimates of service life

Description: The Department of Energy has established specifications for the DWPF product, which require that the DWPF provide estimates of the service life of the canister label, provide assurance that the DWPF canister will be leaktight when shipped, demonstrate that the contents of the canistered waste form will not lead to internal corrosion of the canister. The DWPF has elected to meet these requirements, in part, by characterizing canisters produced in the facility during the Startup Test Program. Thi… more
Date: January 11, 1993
Creator: Plodinec, M.J.; Harbour, J.R. & Marra, S.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The shock Hugoniot of 316 ss and sound velocity measurements

Description: Type 316 stainless steel has been characterized for its high-pressure, shock-wave response. Measurements have been made of shock-wave and particle velocity, and of sound velocity. Our preliminary results for shock and particle velocity have been combined with previously unpublished results, and an overall fit made. Sound velocity results show a discontinuity that is attributed to shock-induced melting.
Date: January 1, 1993
Creator: Hixson, R.S.; McQueen, R.G. & Fritz, J.N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Behavior of sulfur and chlorine in coal during combustion and boiler corrosion. Technical report, December 1, 1992--February 28, 1993

Description: The goals of this project is to investigate the behavior of sulfur and chlorine during pyrolysis and combustion of Illinois coals, the chemistry of boiler deposits and the process of ash formation, and remedial measures to reduce the sulfur and chlorine compounds in combustion gases. The chemistry of boiler deposits provides information about the behavior of sulfur, chlorine, and ash particles during coal combustion. We report results obtained during this quarter on mineralogical and chemical c… more
Date: May 1, 1993
Creator: Chou, C. L.; Hackley, K. C.; Cao, J.; Frost, R. R.; Ruch, R. R.; Pan, W. P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of deposits on corrosion of materials exposed in the Coal-Fired Flow Facility

Description: Candidate heat exchanger materials tested in the Low Mass Flow train at the Coal-Fired Flow Facility (CFFF) at Tullahoma, TN. were analyzed to evaluate their corrosion performance. Tube specimens obtained at each foot of the 14-ft-long Unbend tubes were analyzed for corrosion-scale morphologies, scale thicknesses, and internal penetration depths. Results developed on 1500- and 2000- h exposed specimens were correlated with exposure temperature. In addition, deposit materials collected at severa… more
Date: May 1, 1993
Creator: Natesan, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry. Progress report, January 1, 1992--December 31, 1992

Description: Phase transformation and cracking during RT aging of charged, high-purity Fe18Cr12Ni alloy and commerical 304 ss were examined; results show that {epsilon}* (hcp) hydride formed on Fe18Cr12Ni upon charging, and it decomposed rapidly to form first {epsilon} and then {alpha}` martensite. Morphology of fracture surfaces of Fe18Cr12Ni produced by corrosion fatigue in NaCl solutions and in hydrogen was found to be identical. Effort was made to examine the approaches and methodologies used in service… more
Date: January 25, 1993
Creator: Wei, R. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Deposits on Corrosion of Materials Exposed in the Coal-Fired Flow Facility

Description: Candidate heat exchanger materials tested in the Low Mass Flow train at the Coal-Fired Flow Facility (CFFF) at Tullahoma, TN. were analyzed to evaluate their corrosion performance. Tube specimens obtained at each foot of the 14-ft-long Unbend tubes were analyzed for corrosion-scale morphologies, scale thicknesses, and internal penetration depths. Results developed on 1500- and 2000- h exposed specimens were correlated with exposure temperature. In addition, deposit materials collected at severa… more
Date: May 1, 1993
Creator: Natesan, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reactor Materials Program -- weldment component toughness of SRS PWS piping materials. [Process Water System]

Description: The mechanical properties of austenitic stainless steel materials from the reactor systems in the unirradiated (baseline) and the irradiated conditions have been developed previously for structural and fracture analyses of the pressure boundary of the SRS reactor Process Water System (PWS) components. Individual mechanical specimen test results were compiled into three separate weldment components or regions, namely, the base, weld, and weld heat-affected-zone (HAZ), for two orientations (L-C a… more
Date: February 1, 1993
Creator: Sindelar, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Repair Welding of Fusion Reactor Components

Description: Experiments have shown that irradiated Type 316 stainless steel is susceptible to heat-affected-zone (HAZ) cracking upon cooling when welded using the gas tungsten arc (GTA) process under lateral constraint. The cracking has been hypothesized to be caused by stress-assisted helium bubble growth and rupture at grain boundaries. This study utilized an experimental welding setup which enabled different compressive stresses to be applied to the plates during welding. Autogenous GTA welds were produ… more
Date: May 15, 1993
Creator: Chin, Bryan A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Defect-solute interactions near irradiation grain boundaries

Description: Defect-solute interactions control radiation-induced segregation (RIS) to interfacial sinks, such as grain boundaries, in metallic materials. The best studied system in this regard has been austenitic stainless steels. Measurements of grain boundary composition indicate that RIS of major alloying elements are in reasonable agreement with inverse-Kirkendall predictions. The steep and narrow composition profiles are shown to result from limited back diffusion near the boundary. Subsequently, defe… more
Date: November 1, 1993
Creator: Simonen, E. P.; Vetrano, J. S.; Heinisch, H. L. & Bruemmer, S. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low temperature hydrothermal processing of organic contaminants in Hanford tank waste

Description: Batch and continuous flow reactor tests at Pacific Northwest Laboratory (PNL) have shown that organics similar to those present in the single-shell and double-shell underground storage tanks at Hanford can be decomposed in the liquid phase at relatively mild temperatures of 150[degree]C to 350[degree]C in an aqueous process known as hydrothermal processing (HTP). The organics will react with the abundant oxidants such s nitrite already present in the Hanford tank waste to form hydrogen, carbon … more
Date: February 1, 1993
Creator: Jones, E. O.; Pederson, L. R.; Freeman, H. D.; Schmidt, A. J. & Babad, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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