Influence of moderately elevated temperatures on engineering properties of concrete used for nuclear reactor vaults

2012 ◽  
Vol 34 (8) ◽  
pp. 917-923 ◽  
Author(s):  
S. Divya Rani ◽  
Manu Santhanam
Keyword(s):  
Nuclear Reactor ◽  
Elevated Temperatures ◽  
Engineering Properties

Study of the Effects of High Temperatures on the Engineering Properties of Steel 42CrMo4

2015 ◽  
Vol 34 (1) ◽  
Author(s):  
Josip Brnic ◽  
Goran Turkalj ◽  
Marko Canadija ◽  
Domagoj Lanc ◽  
Marino Brcic
Keyword(s):  
Experimental Data ◽  
Impact Energy ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Charpy Impact ◽  
Engineering Properties ◽  
Charpy Impact Energy ◽  
Rheological Models ◽  
Creep Curves ◽  
Low Levels

AbstractThe paper presents and analyzes the experimental results of the effect of elevated temperatures on the engineering properties of steel 42CrMo4. Experimental data relating to the mechanical properties of the material, the creep resistance as well as Charpy impact energy. Temperature dependence of the mentioned properties is also shown. Some of creep curves were simulated using rheological models and an analytical equation. Finally, an assessment of fracture toughness was made that was based on experimentally determined Charpy impact energy. Based on the obtained results it is visible that the tensile strength (617 MPa) and yield strength (415 MPa) have the highest value at the room temperature while at the temperature of 700 °C (973 K) these values significantly decrease. This steel can be considered resistant to creep at 400 °C (673 K), but at higher temperatures this steel can be subjected to low levels of stress in a shorter time.

DOE-ASME Generation IV Materials Tasks

2006 ◽  
Author(s):  
Timothy E. McGreevy ◽  
Robert I. Jetter
Keyword(s):  
Nuclear Reactor ◽  
Elevated Temperatures ◽  
Future Generation ◽  
Department Of Energy ◽  
Design Codes ◽  
Technology Program ◽  
Program Plan ◽  
American Society

The Department of Energy (DOE) and the American Society of Mechanical Engineers (ASME) wish to update and expand appropriate materials, construction and design codes for application in future Generation IV nuclear reactor systems that operate at elevated temperatures. The scope of interest addresses specific materials and design tasks, all of which are tied to the Generation IV Reactors Integrated Materials Technology Program Plan. Many of the tasks are directly applicable to ASME Section III Subsection NH. The tasks are summarized and discussed with respect to Generation IV needs.

scholarly journals Instability of U3Si2 in pressurized water media at elevated temperatures

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Artaches Migdisov ◽  
Haylea Nisbet ◽  
Nan Li ◽  
Joshua White ◽  
Hongwu Xu ◽  
...  
Keyword(s):  
Uranium Oxide ◽  
Nuclear Reactor ◽  
Elevated Temperatures ◽  
Aqueous Media ◽  
Light Water Reactor ◽  
Pressurized Water ◽  
Water Media ◽  
Fukushima Daiichi ◽  
The Stability ◽  
Enhanced Thermal Conductivity

AbstractFollowing the Fukushima Daiichi accident, significant efforts from industry and the scientific community have been directed towards the development of alternative nuclear reactor fuels with enhanced accident tolerance. Among the proposed materials for such fuels is a uranium silicide compound (U3Si2), which has been selected for its enhanced thermal conductivity and high density of uranium compared to the reference commercial light water reactor (LWR) nuclear fuel, uranium oxide (UO2). To be a viable candidate LWR fuel, however, U3Si2 must also demonstrate that, in the event of this fuel coming in contact with aqueous media, it will not degrade rapidly. In this contribution, we report the results of experiments investigating the stability of U3Si2 in pressurized water at elevated temperatures and identify the mechanisms that control the interaction of U3Si2 under these conditions. Our data indicate that the stability of this material is primarily controlled by the formation of a layer of USiO4 (the mineral, coffinite) at the surface of U3Si2. The results also show that these layers are destabilized at T > 300 °C, leading to the complete decomposition of U3Si2 and its pulverization due to its full oxidation to UO2.

scholarly journals Experimental Analysis of Changes in Cement Mortar Containing Oil Palm Boiler Clinker Waste at Elevated Temperatures in Different Cooling Conditions

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 988
Author(s):  
Muhammad Firdaus Anuar ◽  
Payam Shafigh ◽  
Azman Ma’amor ◽  
Sumra Yousuf ◽  
Farid Wajdi Akashah
Keyword(s):  
Compressive Strength ◽  
Electric Furnace ◽  
Oil Palm ◽  
Elevated Temperatures ◽  
Cement Mortar ◽  
Cementitious Materials ◽  
Engineering Properties ◽  
Sustainable Construction ◽  
Air Cooling ◽  
Cement Based Materials

Changes in cement-based materials containing waste after exposure to elevated temperatures are an important aspect that should be studied in developing sustainable construction materials. Modified cement-based materials obtained using the industrial waste present robust engineering properties can lead to sustainable development. This work evaluated the capacity of oil palm boiler clinker (OPBC) waste that had been produced during the palm oil extraction process as partial and full substitutions for natural sand to produce cement mortar. The mortar materials were cured under three different curing conditions and were then tested at a room temperature of approximately 27 °C and elevated temperatures of 200 °C to 1000 °C using an electric furnace. The specimens were maintained in the electric furnace under maximum temperatures for 2 h and were then cooled down with water or under ambient temperature. The changes in the forms of colour, weight, compressive strength, microstructure, mineralogical composition, and thermal conductivity were investigated. Test results showed that the compressive strength of OPBC mortars was generally higher than the strength of the control mortar after heat exposure. Water cooling exerted less damage to samples compared to air cooling. The results from field emission scanning electron microscopy–energy-dispersive X-ray spectroscopy demonstrated that the mineral composition varied at different temperatures. In conclusion, this work provides an extensive report and can be used as a guide in utilising OPBC as cementitious materials for future cement-based applications.

Mechanical properties of a 20 vol % SiC whisker-reinforced, yttria-stabilized, tetragonal zirconia composite at elevated temperatures

1995 ◽  
Vol 10 (1) ◽  
pp. 113-118 ◽  
Author(s):  
S.E. Dougherty ◽  
T.G. Nieh ◽  
J. Wadsworth ◽  
Y. Akimune
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Tetragonal Zirconia ◽  
Tensile Tests ◽  
Engineering Properties ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Deformation Properties ◽  
Before And After

The high-temperature deformation behavior of a SiC whisker-reinforced, yttria-stabilized, tetragonal zirconia polycrystalline composite containing 20 vol % SiC whiskers (SiC/Y-TZP) has been investigated. Tensile tests were performed in vacuum at temperatures from 1450 °C to 1650 °C and at strain rates from 10−3 to 10−5 s−1. The material exhibits useful high-temperature engineering properties (e.g., ∼100 MPa and 16% elongation at T = 1550 °C and at a strain rate of ∼10−4 s−1). The stress exponent was determined to be n ≍ 2. Scanning electron microscopy was used to characterize the grain size and morphology of the composites, both before and after deformation. The grain size in the composite was initially fine, but coarsened at the test temperatures; both dynamic and static grain growth were observed. The morphology of ceramic reinforcements appears to affect strongly the plastic deformation properties of Y-TZP. A comparison is made between the properties of monolithic Y-TZP, 20 wt. % Al2O3 particulate-reinforced Y-TZP (Al2O3/Y-TZP), and SiC/Y-TZP composites.

A Thoroughgoing Study on Engineering Properties of High Strength Concrete at Elevated Temperatures

2021 ◽  
Author(s):  
Ramezan Ali Izadifard ◽  
Amir Khalighi ◽  
Mehrdad Abdi Moghadam ◽  
Hossein Balouei Pirnaeimi
Keyword(s):  
High Strength Concrete ◽  
Elevated Temperatures ◽  
High Strength ◽  
Engineering Properties ◽  
Strength Concrete

S.A.P.-865

Alloy Digest ◽  
1965 ◽  
Vol 14 (8) ◽  
Keyword(s):  
Tensile Strength ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Engineering Properties ◽  
Powder Metal ◽  
High Tensile Strength ◽  
Temperature Performance ◽  
Sintered Aluminum

Abstract SAP is a special Sintered Aluminum Powder characterized by high tensile strength at room temperature and at elevated temperatures. It features a range of useful engineering properties. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, machining, joining, and powder metal forms. Filing Code: Al-146. Producer or source: Aluminium Industrie Atkiengesellschaft.

CROLOY 800

Alloy Digest ◽  
1984 ◽  
Vol 33 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Food Processing ◽  
Nuclear Reactor ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Steam Generators ◽  
Resistance To Oxidation ◽  
High Temperature Processing

Abstract CROLOY 800 is an austenitic stainless steel intended for high-temperature service. In addition to its excellent resistance to corrosion in various media, it exhibits excellent strength and resistance to oxidation at elevated temperatures. Among its many applications are high-temperature processing of hydrocarbons in refinery or petrochemical services, superheater and reheater tubin8g, nuclear reactor steam generators, heat-treating equipment and food processing. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-454. Producer or source: Babcock & Wilcox Company.

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