scholarly journals PEACH BOTTOM REACTOR VESSEL IRRADIATION SURVEILLANCE PROGRAM. IMPACT TEST RESULTS ON CHARPY SPECIMENS AT NOZZLE ACCESS PLUG AFTER 300 EFPD.

1969 ◽  
Author(s):  
J. Hildebrand
Keyword(s):  
Impact Test ◽  
Reactor Vessel ◽  
Surveillance Program ◽  
Test Results ◽  
Program Impact

An Improved Test Facility for Studying Deposit Fouling on Steam Turbine Blades

2016 ◽  
Author(s):  
Alan R. May Estebaranz ◽  
Richard J. Williams ◽  
Simon I. Hogg ◽  
Philip W. Dyer
Keyword(s):  
Turbine Blades ◽  
Steam Pressure ◽  
Reactor Vessel ◽  
Test Facility ◽  
Test Results ◽  
Steam Turbines ◽  
Steam Power ◽  
Scale Test ◽  
Steam Turbine Blades ◽  
Asme Paper

A laboratory scale test facility has been developed to investigate deposition in steam turbines under conditions that are representative of those in steam power generation cycles. The facility is an advanced two-reactor vessel test arrangement, which is a more flexible and more accurately controllable refinement to the single reactor vessel test arrangement described previously in ASME Paper No. GT2014-25517 [1]. The commissioning of the new test facility is described in this paper, together with the results from a series of tests over a range of steam conditions, which show the effect of steam conditions (particularly steam pressure) on the amount and type of deposits obtained. Comparisons are made between the test results and feedback/experience of copper fouling in real machines.

Analysis Method for Impact and Dispersion Behavior of Water-Filled Tank

2018 ◽  
Vol 4 (4) ◽  
Author(s):  
Hidekazu Takazawa ◽  
Kazuma Hirosaka ◽  
Katsumasa Miyazaki ◽  
Norihide Tohyama ◽  
Naomi Matsumoto
Keyword(s):  
Structural Damage ◽  
Impact Test ◽  
Velocity Ratio ◽  
Research Centre ◽  
Dispersion Pattern ◽  
Test Results ◽  
Analysis Method ◽  
Cylindrical Tank ◽  
Dispersion Behavior ◽  
The Impact

A new Japanese nuclear regulation involves estimating the possible damage to plant structures due to intentional aircraft impact. The effect of aircraft impact needs to be considered in the existing nuclear power plants. The structural damage and fuel dispersion behavior after aircraft impact into plant structures can be evaluated using finite element analysis (FEA). FEA needs validated experimental data to determine the reliability of the results. In this study, an analysis method was validated using a simple model such as a cylindrical tank. Numerical simulations were conducted to evaluate the impact and dispersion behavior of a water-filled cylindrical tank. The simulated results were compared with the test results of the VTT Technical Research Centre of Finland (VTT). The simulations were carried out using a multipurpose FEA code LS-DYNA®. The cylindrical tank was modeled using a shell element, and the tank water was modeled using smoothed particle hydrodynamics (SPH) elements. First, two analysis models were used to evaluate the effect of the number of SPH elements. One had about 300,000 SPH elements and the other had 37,000 SPH elements. The cylindrical tank ruptured in the longitudinal direction after crashing into a rigid wall, and the filled water dispersed. There were few differences in the simulated results when using different numbers of SPH elements. The VTT impact test was simulated with an arbitrary Lagrangian-Eulerian (ALE) element to consider the air drag. The analytical dispersion pattern and history of dispersion velocity ratio agreed well with the impact test results.

Wear of Tools Coated with Various PVD Films: Correlation with Impact Test Results by Means of FEM Simulations

2007 ◽  
Vol 4 (3) ◽  
pp. 301-310 ◽  
Author(s):  
Konstantinos-Dionysios Bouzakis ◽  
Ioannis Mirisidis ◽  
Nikolaos Michailidis ◽  
Eleftheria Lili ◽  
Anastasios Sampris ◽  
...  
Keyword(s):  
Impact Test ◽  
Test Results ◽  
Fem Simulations

scholarly journals Heat treatment effect on metal matrix composite with brass matrix and fly ash

2018 ◽  
Vol 204 ◽  
pp. 05020
Author(s):  
Aminnudin Aminnudin ◽  
Moch. Agus Choiron
Keyword(s):  
Heat Treatment ◽  
Fly Ash ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Coal Combustion ◽  
Metal Matrix ◽  
Treatment Process ◽  
Impact Test ◽  
Test Results ◽  
The Matrix

Metal matrix composite (MMC) is a combination of two or more materials using metal as a matrix. In this paper we used brass as the matrix and fly ash as for the particle. The fly ash used is fly ash which is produced from coal combustion in the Paiton power plant. Fly ash composition in the MMC are 5% and 10%. The MMC was produced with gas furnace. Heat tratment to MMC was done at 350 and 400 °C.Hard testing process, tensile test and impack test are carried out at MMC before heat treatment and after heat treatment. From the test results showed an increase in hardness, tensile strength and impact test showed the heat treatment process at a temperature of 350 °C. Heat treatment at a temperature of 400 °C does not improve the mechanical properties of MMC

An Update on the Investigation of Fracture Toughness Properties of the High Flux Reactor Vessel From Surveillance Test Campaign in 2017

2019 ◽  
Author(s):  
M. Kolluri ◽  
F. H. E. de Haan – de Wilde ◽  
H. S. Nolles ◽  
A. J. M. de Jong
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Fracture Surface ◽  
Neutron Fluence ◽  
Reactor Vessel ◽  
Surveillance Program ◽  
High Flux ◽  
High Flux Reactor ◽  
Flux Reactor ◽  
Vessel Material

Abstract The reactor vessel of the High Flux Reactor (HFR) in Petten has been fabricated from Al 5154-O alloy grade with a maximum Mg content of 3.5 wt. %. The vessel experiences large amount of neutron fluences (notably at hot spot), of the order of 1027 n/m2, during its operational life. Substantial damage to the material’s microstructure and mechanical properties can occur at these high fluence conditions. To this end, a dedicated surveillance program: SURP (SURveillance Program) is executed to understand, predict and measure the influence of neutron radiation damage on the mechanical properties of the vessel material. In the SURP program, test specimens fabricated from representative HFR vessel material are continuously irradiated in two specially designed experimental rigs. A number of surveillance specimens are periodically extracted and tested to evaluate the changes in fracture toughness properties of the vessel as function neutron fluence. The surveillance testing results of test campaigns performed until 2015 were published previously in [1, 2]. The current paper presents fracture toughness and SEM results from the recent surveillance campaign performed in 2017. The fracture toughness specimen tested in this campaign received a thermal neutron fluence of 13.56 x1026 n/m2, which is ∼8.9 × 1025 n/m2 more than the thermal fluence received by the specimen tested in SURP 2015 campaign. These results from this campaign have shown no change in the fracture toughness from the values measured in the previous SURP campaign. The SEM observations are performed to study the fracture surface, to measure (by WDS) the transmutation Si formed near crack tip and to investigate various inclusions in the microstructure. SEM fracture surface investigation revealed a tortuous (bumpy) fracture surface constituting micro-scale dimples over majority of the fracture area. Islands of cleavage facets and secondary cracks have been observed as well. EDS analysis of various inclusions in the microstructure revealed presence of Fe rich inclusions and Mg-Si rich precipitates. Additionally, inclusions rich in Al-Mg-Cr-Ti were identified. Finally, changes in mechanical properties of Al 5154-O alloy with an increase in neutron fluence (or transmutation Si) are discussed in correlation with SEM microstructure and fracture morphology observed in SEM. TEM investigation of precipitate microstructure is ongoing and those results will be published in future.

PREDICTION OF A MODIFIED PTW MODEL FOR VARIOUS TAYLOR IMPACT TESTS OF TANTALUM

2008 ◽  
Vol 22 (31n32) ◽  
pp. 6247-6252 ◽  
Author(s):  
JONG-BONG KIM ◽  
HYUNHO SHIN
Keyword(s):  
Strain Rate ◽  
Strain Hardening ◽  
Impact Test ◽  
Constitutive Behavior ◽  
Test Results ◽  
Impact Tests ◽  
Different Temperatures ◽  
Taylor Impact ◽  
Prediction Capability ◽  
Voce Equation

The strain hardening part of the Preston-Tonks-Wallace (PTW) model, developed for the description of the plastic constitutive behavior of materials at wide ranges of strain, strain rate, and temperature, has been modified by employing the Voce equation. The prediction capability of the modified PTW (MPTW) has been investigated with reference to Taylor impact test results in the literature, and comparison has been made with the models of Johnson-Cook (JC), Steiberg-Guinan (SG), Zerilli-Armstrong (ZA), and PTW. Of the compared existing models, no model was appropriate for describing the results of various Taylor impact tests. However, the modified PTW is shown to predict fairly accurate results in terms of the length, diameter, and shape of the deformed specimen tested at different temperatures and impact velocity.

Master Integrated Reactor Vessel Surveillance Program

2007 ◽  
Vol 4 (9) ◽  
pp. 100730 ◽  
Author(s):  
J. Brian Hall ◽  
Dan F. Spond ◽  
R. Lott ◽  
S. W. Dean
Keyword(s):  
Reactor Vessel ◽  
Surveillance Program

S191024 Re-entry Capsule Water Impact Test Results : Vertical Free Fall Water Impact Test

2012 ◽  
Vol 2012 (0) ◽  
pp. _S191024-1-_S191024-4
Author(s):  
Eiichiro NAKANO ◽  
Hideaki UCHIKAWA ◽  
Hideyuki TANNO ◽  
Takashi SEKI
Keyword(s):  
Impact Test ◽  
Free Fall ◽  
Test Results ◽  
Water Impact

Micro-Deval Testing of Aggregates in the Southeast

2003 ◽  
Vol 1837 (1) ◽  
pp. 73-79 ◽  
Author(s):  
L. Allen Cooley ◽  
Robert S. James
Keyword(s):  
Los Angeles ◽  
Magnesium Sulfate ◽  
Impact Test ◽  
Southeastern United States ◽  
Test Results ◽  
Performance Category ◽  
Los Angeles Abrasion ◽  
National Cooperative ◽  
Highway Research

Aggregate used in hot-mix asphalt (HMA) must be tough and durable, not only to withstand the effects of HMA production, transportation, and construction but also to resist the effects of traffic and the environment. Historically, the Los Angeles abrasion and impact test has determined the toughness of aggregates. The long-term durability characteristics of aggregates are generally determined using a soundness test: sodium or magnesium sulfate. During the National Cooperative Highway Research Program’s Project 4–19, the micro-Deval test, in conjunction with the magnesium sulfate soundness test, were recommended in lieu of the Los Angeles abrasion and impact test and other soundness tests. Therefore, a study was needed within the southeastern United States to evaluate the range in micro-Deval results that could be expected. This research characterized the toughness and durability of aggregates with respect to their micro-Deval test results. Seventy-two aggregate sources from eight different states were included in this research. These aggregates were rated as good, fair, or poor with respect to performance by the contributing state. On the basis of the results of this study, some large differences were found in micro-Deval test results within a given performance category. There was no relationship between Los Angeles abrasion and impact and micro-Deval test results.

scholarly journals Investigation and comparison between new satellite impact test results and NASA standard breakup model

2008 ◽  
Vol 35 (12) ◽  
pp. 1567-1572 ◽  
Author(s):  
K. Sakuraba ◽  
Y. Tsuruda ◽  
T. Hanada ◽  
J.-C. Liou ◽  
Y. Akahoshi
Keyword(s):  
Impact Test ◽  
Test Results ◽  
Breakup Model
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