scholarly journals Imaging of Calibrated Defects in Additively Manufactured Materials: Pulsed Thermal Tomography Nondestructive Examination of Additively Manufactured Reactor Materials and Components

2020 ◽  
Author(s):  
Alexander Heifetz ◽  
Xin Zhang ◽  
Jafar Saniie ◽  
Dmitry Shribak ◽  
Thomas W. Elmer ◽  
...  
Keyword(s):  
Nondestructive Examination ◽  
Thermal Tomography ◽  
Reactor Materials

The evolution of the microstructure of 600 Mev proton irradiated materials

1990 ◽  
Vol 48 (4) ◽  
pp. 1002-1003
Author(s):  
R. Gotthardt ◽  
A. Horsewell ◽  
F. Paschoud ◽  
S. Proennecke ◽  
M. Victoria
Keyword(s):  
Nuclear Reactions ◽  
Dislocation Loops ◽  
Defect Clusters ◽  
Weak Beam ◽  
Stacking Fault Tetrahedra ◽  
Small Defect ◽  
Sufficient Intensity ◽  
Reactor Materials ◽  
Metallic Impurities ◽  
Beam Technique

Fusion reactor materials will be damaged by an intense field of energetic neutrons. There is no neutron source of sufficient intensity at these energies available at present, so the material properties are being correlated with those obtained in irradiation with other irradiation sorces. Irradiation with 600 MeV protons produces both displacement damage and impurities due to nuclear reactions. Helium and hydrogen are produced as gaseous impurities. Other metallic impurities are also created . The main elements of the microstructure observed after irradiation in the PIREX facility, are described in the following paragraphs.A. Defect clusters at low irradiation doses: In specimens irradiated to very low doses (1021-1024 protons.m-2), so that there is no superimposition of contrast, small defect clusters have been observed by the weak beam technique. Detailed analysis of the visible contrast (>0.5 nm diameter) revealed the presence of stacking fault tetrahedra, dislocation loops and a certain number of unidentified clusters . Typical results in Cu and Au are shown in Fig. 1.

First Practical Experiences with Submerged Rope-Type Bio-Film Reactors for Upgrading and Nitrification

1991 ◽  
Vol 23 (4-6) ◽  
pp. 825-834 ◽  
Author(s):  
T. H. Lessel
Keyword(s):  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Practical Application ◽  
Reactor Material ◽  
Reactor Materials ◽  
Practical Experiences ◽  
One Year ◽  
Operational Data

The upgrading and nitrification was required for the waste water treatment plant in Geiselbullach. As space for more aeration tanks was not available, the possibility of increasing the MLSS by the use of submerged bio-film reactors was tested in a half technical scale pilot plant with three different reactor materials. Each tested reactor material caused a significant increase of MLSS and the nitrification reaction. The rope-type material was selected for the practical application, as it had not the same disadvantages of the other tested systems, which proved operational problems. After one year of continuous operation for nitrification in the full scale plant the influences on the biomass characteristics were investigated. Design criterias and details and operational data are reported.

scholarly journals REQUIREMENTS FOR THE DUAL Fe + H/He BEAM AT THE ACCELERATOR HIPR FOR SIMULATION OF NEUTRON INFLUENCE ON NUCLEAR REACTOR MATERIALS

2020 ◽  
Vol 1686 ◽  
pp. 012073
Author(s):  
P A Fedin ◽  
A V Ziiatdinova ◽  
K E Pryanishnikov ◽  
R P Kuibeda ◽  
T V Kulevoy ◽  
...  
Keyword(s):  
Nuclear Reactor ◽  
Reactor Materials

Recent Progress in Subsized Charpy Impact Specimen Testing for Fusion Reactor Materials Development

1986 ◽  
Vol 10 (3P2A) ◽  
pp. 728-733 ◽  
Author(s):  
G.E. Lucas ◽  
G.R. Odette ◽  
J.W. Sheckherd ◽  
M.R. Krishnadev
Keyword(s):  
Recent Progress ◽  
Fusion Reactor ◽  
Charpy Impact ◽  
Materials Development ◽  
Impact Specimen ◽  
Reactor Materials
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