22 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Pressure Vessels"  
Results: 1 - 22
open access

Assessing the Effects of Radiation Damage on Ni-base Alloys for the Prometheus Space Reactor System

Description: Ni-base alloys were considered for the Prometheus space reactor pressure vessel with operational parameters of {approx}900 K for 15 years and fluences up to 160 x 10{sup 20} n/cm{sup 2} (E > 0.1 MeV). This paper reviews the effects of irradiation on the behavior of Ni-base alloys and shows that radiation-induced swelling and creep are minor considerations compared to significant embrittlement with neutron ,exposure. While the mechanism responsible for radiation-induced embrittlement is not f… more
Date: January 19, 2006
Creator: Angeliu, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Crack growth rates of irradiated austenitic stainless steel weld heat affected zone in BWR environments.

Description: Austenitic stainless steels (SSs) are used extensively as structural alloys in the internal components of reactor pressure vessels because of their superior fracture toughness. However, exposure to high levels of neutron irradiation for extended periods can exacerbate the corrosion fatigue and stress corrosion cracking (SCC) behavior of these steels by affecting the material microchemistry, material microstructure, and water chemistry. Experimental data are presented on crack growth rates of th… more
Date: January 31, 2006
Creator: Chopra, O. K.; Alexandreanu, B.; Gruber, E. E.; Daum, R. S.; Shack, W. J. & Technology, Energy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reducing Ultra-Clean Transportation Fuel Costs with HyMelt Hydrogen Quarterly Report: March-June 2006

Description: This report describes activities for the fifteenth quarter of work performed under this agreement. MEFOS, the gasification testing subcontractor, reported to EnviRes that the vendor for the pressure vessel for above atmospheric testing plans to deliver it by October 20, 2006. MEFOS performed a hazardous operation review of pressurized testing.
Date: July 1, 2006
Creator: Malone, Donald P. & Renner, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Long-Term Corrosion Behavior of Alloy 22 in 5 M CaCl2 at 120?C

Description: In conditions where tight crevices exist in hot chloride containing solutions Alloy 22 may suffer crevice corrosion. The occurrence (or not) of crevice corrosion in a given environment (e.g. salt concentration and temperature), is governed by the values of the critical potential (E{sub crit}) for crevice corrosion and the corrosion potential (E{sub corr}). This paper discusses the evolution of E{sub corr} and corrosion rate (CR) of creviced Alloy 22 specimens in 5 M calcium chloride (CaCl{sub 2… more
Date: February 5, 2006
Creator: Estill, J. C.; Hust, G. A.; Evans, K. J.; Stuart, M. L. & Rebak, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reducing Ultra-Clean Transportation Fuel Costs with HyMelt Hydrogen Quarterly Report: January-March 2006

Description: Phase I of the work to be done under this agreement consisted of conducting atmospheric gasification of coal using the HyMelt technology to produce separate hydrogen rich and carbon monoxide rich product streams. In addition smaller quantities of petroleum coke and a low value refinery stream were gasified. Phase II of the work to be done under this agreement, consists of gasification of the above-mentioned feeds at a gasifier pressure of approximately 5 bar. The results of this work will be us… more
Date: April 1, 2006
Creator: Malone, Donald P. & Renner, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessing the Effects of Radiation Damage on Ni-base Alloys for the Prometheus Space Reactor System

Description: Ni-base alloys were considered for the Prometheus space reactor pressure vessel with operational parameters of {approx}900 K for 15 years and fluences up to 160 x 10{sup 20} n/cm{sup 2} (E > 0.1 MeV). This paper reviews the effects of irradiation on the behavior of Ni-base alloys and shows that radiation-induced swelling and creep are minor considerations compared to significant embrittlement with neutron exposure. While the mechanism responsible for radiation-induced embrittlement is not fu… more
Date: April 4, 2006
Creator: Angeliu, T.; Ward, J. & Witter, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reducing Ultra-Clean Transportation Fuel Costs with HyMelt Hydrogen

Description: This report describes activities for the sixteenth quarter of work performed under this agreement. MEFOS, the gasification testing subcontractor, reported to EnviRes that the vendor for the pressure vessel for above atmospheric testing now plans to deliver it by November 20, 2006 instead of October 20, 2006 as previously reported. MEFOS performed a hazardous operation review of pressurized testing. The current schedule anticipates above atmospheric pressure testing to begin during the week of A… more
Date: September 30, 2006
Creator: Malone, Donald P. & Renner, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Chemistry Variations in Plate and Weld Filler Metal on the Corrosion Performance of Ni-Cr-Mo Alloys

Description: The ASTM standard B 575 provides the requirements for the chemical composition of Nickel-Chromium-Molybdenum (Ni-Cr-Mo) alloys such as Alloy 22 (N06022) and Alloy 686 (N06686). The compositions of each element are given in a range. For example, the content of Mo is specified from 12.5 to 14.5 weight percent for Alloy 22 and from 15.0 to 17.0 weight percent for Alloy 686. It was important to determine how the corrosion rate of welded plates of Alloy 22 using Alloy 686 weld filler metal would cha… more
Date: February 5, 2006
Creator: Fix, D V & Rebak, R B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Methods to Calculate Corrosion Rates for Alloy 22 from Polarization Resistance Experiments

Description: The general corrosion rate may be measured using immersion tests or electrochemical tests. Electrochemical tests are fast and can be used for a rapid screening of environmental effects such as temperature and electrolyte composition. Electrochemical tests are described in ASTM standards G 59 and G 102. The basis of these tests is to calculate the resistance to polarization (R{sub p}) in a voltage vs. current plot and to convert these values to corrosion rates using Faraday's law. Commercial sof… more
Date: March 28, 2006
Creator: Wong, L L; Martin, S I & Rebak, R B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electrochemical Testing of Gas Tungsten Arc Welded and Reduced Pressure Electron Beam Welded Alloy 22

Description: Alloy 22 (N06022) is the material selected for the fabrication of the outer shell of the nuclear waste containers for the Yucca Mountain high-level nuclear waste repository site. A key technical issue in the waste package program has been the integrity of the container weld joints. The currently selected welding process for fabricating and sealing the containers is the traditional gas tungsten arc welding (GTAW) or TIG method. An appealing faster alternative technique is reduced pressure electr… more
Date: February 5, 2006
Creator: Day, S. D.; Wong, F. G.; Gordon, S. R.; Wong, L. L. & Rebak, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A STRUCTURAL INTEGRITY ASSESSMENT OF UNDERGROUND PIPING ASSOCIATED WITH THE TRANSFER OF RADIOACTIVE WASTE

Description: Radioactive wastes are confined in 49 underground storage tanks at the Savannah River Site. The waste is transported between tanks via underground transfer piping. An assessment of the structural integrity of the transfer piping was performed to ensure that the present condition of the piping was sound and to provide life expectancy estimates for the piping based on anticipated service. The assessment reviewed the original design of the piping, the potential and observed degradation mechanisms,… more
Date: April 25, 2006
Creator: Wiersma, B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

REACTOR PRESSURE VESSEL TEMPERATURE ANALYSIS OF CANDIDATE VERY HIGH TEMPERATURE REACTOR DESIGNS

Description: Analyses were performed to determine maximum temperatures in the reactor pressure vessel for two potential Very-High Temperature Reactor (VHTR) designs during normal operation and during a depressurized conduction cooldown accident. The purpose of the analyses was to aid in the determination of appropriate reactor vessel materials for the VHTR. The designs evaluated utilized both prismatic and pebble-bed cores that generated 600 MW of thermal power. Calculations were performed for fluid outlet … more
Date: October 1, 2006
Creator: Gougar, Hans D.; Davis, Cliff B.; Hayner, George & Weaver, Kevan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reactor Pressure Vessel Temperature Analysis for Prismatic and Pebble-Bed VHTR Designs

Description: Analyses were performed to determine maximum temperatures in the reactor pressure vessel for two potential Very-High Temperature Reactor (VHTR) designs during normal operation and during a depressurized conduction cooldown accident. The purpose of the analyses was to aid in the determination of appropriate reactor vessel materials for the VHTR. The designs evaluated utilized both prismatic and pebble-bed cores that generated 600 MW of thermal power. Calculations were performed for fluid outlet … more
Date: April 1, 2006
Creator: Gougar, H. D. & Davis, C. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

COMPARATIVE CORROSION BEHAVIOR OF TWO PALLADIUM CONTAINING TITANIUM ALLOYS

Description: The ASTM standard B 265 provides the requirements for the chemical composition of titanium (Ti) alloys. It is planned to use corrosion resistant and high strength titanium alloys to fabricate the drip shield at the proposed Yucca Mountain Repository. Titanium grade (Gr) 7 (R52400) and other Ti alloys are currently being characterized for this application. Ti Gr 7 contains 0.15% Palladium (Pd) to increase its corrosion performance. In this article we report results on the comparative short term … more
Date: July 23, 2006
Creator: T. Lian, T. Yashiki, T. Nakayama, T. Nakanishi, R. B. Rebak
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LENS repair and modification of metal NW components:materials and applications guide.

Description: Laser Engineered Net Shaping{trademark} (LENS{reg_sign}) is a unique, layer additive, metal manufacturing technique that offers the ability to create fully dense metal features and components directly from a computer solid model. LENS offers opportunities to repair and modify components by adding features to existing geometry, refilling holes, repairing weld lips, and many other potential applications. The material deposited has good mechanical properties with strengths typically slightly highe… more
Date: November 1, 2006
Creator: Smugeresky, John E. (Sandia National Laboratories, Livermore, CA); Gill, David Dennis; Oberhaus, Jason (BWXT Y-12); Adams, Thad (Savannah River National Laboratory) & VanCamp, Chad (Kansas City Plant)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Anodic Behavior of Alloy 22 in High Nitrate Brines at Temperatures Higher than 100(degree)C

Description: Alloy 22 (N06022) may be susceptible to crevice corrosion in chloride solutions. Nitrate acts as an inhibitor to crevice corrosion. Several papers have been published regarding the effect of nitrate on the corrosion resistance of Alloy 22 at temperatures 100 C and lower. However, very little is known about the behavior of this alloy in highly concentrated brines at temperatures above 100 C. In the current work, electrochemical tests have been carried out to explore the anodic behavior of Alloy … more
Date: March 28, 2006
Creator: Ilevbare, G. O.; Etien, R. A.; Estill, J. C.; Hust, G. A.; Yilmaz, A.; Stuart, M. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Finite Element Models for Computing Seismic Induced Soil Pressures on Deeply Embedded Nuclear Power Plant Structures.

Description: PAPER DISCUSSES COMPUTATIONS OF SEISMIC INDUCED SOIL PRESSURES USING FINITE ELEMENT MODELS FOR DEEPLY EMBEDDED AND OR BURIED STIFF STRUCTURES SUCH AS THOSE APPEARING IN THE CONCEPTUAL DESIGNS OF STRUCTURES FOR ADVANCED REACTORS.
Date: June 26, 2006
Creator: Xu, J.; Costantino, C. & Hofmayer, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ultrasonic Digital Communication System for a Steel Wall Multipath Channel: Methods and Results

Description: As of the development of this thesis, no commercially available products have been identified for the digital communication of instrumented data across a thick ({approx} 6 n.) steel wall using ultrasound. The specific goal of the current research is to investigate the application of methods for digital communication of instrumented data (i.e., temperature, voltage, etc.) across the wall of a steel pressure vessel. The acoustic transmission of data using ultrasonic transducers prevents the need … more
Date: February 16, 2006
Creator: Murphy, TL
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Reducing Ultra-Clean Transportation Fuel Costs with HyMelt Hydrogen Quarterly Report: October-December 2005

Description: This report describes activities for the thirteenth quarter of work performed under this agreement. EnviRes initiated a wire transfer of funds for procurement of a pressure vessel and associated refractory lining. Phase I of the work to be done under this agreement consisted of conducting atmospheric gasification of coal using the HyMelt technology to produce separate hydrogen rich and carbon monoxide rich product streams. In addition smaller quantities of petroleum coke and a low value refiner… more
Date: January 1, 2006
Creator: Malone, Donald P. & Renner, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gas Hydrate Storage of Natural Gas

Description: Environmental and economic benefits could accrue from a safe, above-ground, natural-gas storage process allowing electric power plants to utilize natural gas for peak load demands; numerous other applications of a gas storage process exist. A laboratory study conducted in 1999 to determine the feasibility of a gas-hydrates storage process looked promising. The subsequent scale-up of the process was designed to preserve important features of the laboratory apparatus: (1) symmetry of hydrate accu… more
Date: March 31, 2006
Creator: Rogers, Rudy & Etheridge, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparative Corrosion Behavior of Two Palladium Containing Titanium Alloys

Description: The ASTM standard B 265 provides the requirements for the chemical composition of titanium (Ti) alloys. It is planned to use corrosion resistant and high strength titanium alloys to fabricate the drip shield at the proposed Yucca Mountain Repository. Titanium grade (Gr) 7 (R52400) and other Ti alloys are currently being characterized for this application. Ti Gr 7 contains 0.15% Palladium (Pd) to increase its corrosion performance. In this article we report results on the comparative short term … more
Date: February 5, 2006
Creator: Lian, T; Yashiki, T; Nakayama, T; Nakanishi, T & Rebak, R B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LOW VELOCITY IMPACT RESPONSE OF A LAMINATED COMPOSITE TUBE WITH A METALLIC BUMPER LAYER

Description: A thin metallic sheet was bonded to the outer surface of a laminated composite curved beam as a bumper layer. It was believed that a metallic bumper layer such as an aluminum thin sheet would be able to intercept any lateral impacting force and absorb impact energy through plastic deformation. Since aluminum is comparatively light weight, a thin sheet will not result in a significant increase in structural weight. Results showed that impact damage occurred primarily in the bumper layer, thereby… more
Date: July 1, 2006
Creator: Ibekwe, S.I.; Li, G.; Pang, S.S. & and Smith, B. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen