216 Jewish Hospital of St. Louis

https://digitalcommons.wustl.edu/bjc_216/1185/thumbnail.jp

1st Nuclear Knowledge Preservation & Consolidation (NKP&C) Workshop

Nuclear knowledge had been build up continuously since the middle of the last century. After Chernobyl in 1986 the public opinion changed leading to a gradual phasing out process of nuclear energy in several Member States. During that time a trend at universities and in industry was observed of a decrease in students choosing nuclear related studies. Now the generation of senior nuclear experts is retiring. On the other hand, due to security supply and climate change issues (green house mitigation measures) receiving more importance lately, a renaissance of nuclear power is ongoing. In order to avoid a possible loss of capability and knowledge in the EU action is taken now preserving and disseminating it to the new generation. There is a huge amount of information and knowledge available, either published or easily available, but also publications difficult to trace. Especially those are at risk of being dispersed or lost due to a series of factors, including: ¿ retirement of Senior Experts who were present at the time when most Nuclear Power Plants were designed and put into operation, ¿ generational gap (due to years of decline in new constructions, only a limited number of people started their career in that area) ¿ non-electronic publishing in the past ¿ limited dissemination possibilities ¿ language (many non-English publications from Eastern countries) Therefore, the Institute for Energy of the Directorate General Joint Research Centre has developed a method for consolidation of nuclear knowledge Several reviewers received between 7 and 21 papers in their field of expertise, in order to review the content and present it for discussion and consolidation to the WWER Reactor Pressure Vessel embrittlement experts during the workshop. The reports and presentations were requested to follow the below structure: o per paper ¿ paper title, author(s), reference ¿ reviewers summary/abstract ¿ comments on "up-to-date-ness" of the papers/material o conclusion on the complete review: ¿ more reference papers in the area known to the reviewer ¿ open issues in the area known to the reviewer The short-term scope is to reach a consolidated conclusion for the individual reviews, after the discussion and consolidation process during the workshop. The medium-term scope is a consolidated review in the individual expert fields. The long-term scope is to prepare a State-of-the-Art report for the complete WWER RPV Irradiation Embrittlement expert field, incl. the history and reasons of the choices made (material, composition, etc.). The last general document was produced more than 26 years ago by Nikolaev, Amaev and Alechenko, which is in Russian and needs upgrading.JRC.F.4-Safety of future nuclear reactor

2nd International Workshop on Physics-Based Modelling of Material Properties and Experimental Observations with special focus on Fracture and Damage Mechanics: Book of Abstracts

This report covers the book of abstracts of the 2nd International Workshop on Physics Based Modelling of Material Properties and Experimental Observations, with special focus on Fracture and Damage Mechanics. The workshop is organized in the context of European Commission’s Enlargement and Integration Action, by the Joint Research Centre in collaboration with the TOBB University of Economics and Technology (TOBB ETU) on 15th-17th May 2013 in Antalya, Turkey. The abstracts of the keynote lectures and all the technical presentations are included in the book. This workshop will give an overview of different physics-based models for fracture and degradation of metallic materials and how they can be used for improved understanding and more reliable predictions. Models of interest include cohesive zones to simulate fracture processes, ductile-brittle transition for ferritic steels, ductile fracture mechanisms such as void growth or localized shear, fatigue crack initiation and short crack growth, environmental assisted cracking. Experimental studies that support such models and case studies that illustrate their use are also within the scope. The workshop is also an opportunity for scientists and engineers from EU Member States and target countries to discuss research activities that could be a basis for future collaborations.JRC.F.4-Nuclear Reactor Integrity Assessment and Knowledge Managemen

Symposium on micro-metallurgy

Micro-metallurgy relating to the role of minute additions to metals and alloys present a fascinating metallurgical spectrum ranging from basic and fundamental research studies to applied research

Surface Studies on Industrial Aluminium Alloys

Aluminium alloys are used in a wide range of applications due to their high tensile strength concomitant with low density. Additionally, aluminium alloys form a naturally occurring and passivating oxide layer, which leads to high corrosion and weathering resistance. In industrial manufacturing, aluminium alloys acquire their desired properties through specially designed heating processes. A common method to join aluminium work pieces together is brazing. The work pieces designed for brazing applications are coated with an aluminium alloy, which has a lower melting point as the base material. During brazing the top alloy is molten and the covering oxide layer needs to be broken up to achieve a strong and durable connection between the work pieces. This thesis present how temperature treatment affectss the surface layer of two different aluminium alloys. The processes taking place during heat treatment were studied by a combination of microscopy and spectroscopy techniques. Both alloys were heated in an UHV chamber and characterized after subsequent heating by using different operational modes of the SPELEEM (Spectroscopic PhotoEmission and Low Energy Electron Microscope). The SPELEEM is situated at beamline I311 at the MAX II storage ring at the national Swedish synchrotron radiation facility, MAX IV Laboratory. The operation modes of the SPELEEM that were used for this study are MEM (Mirror Electron Microscopy), XPEEM (X-ray PhotoEmission Electron Microscopy) and XPS (X-ray Photoelectron Spectroscopy). In addition, the samples were examined by SEM (Scanning Electron Microscopy) before and after the heat treatment. Using the above described combination of different surface science techniques, the changes occurring upon heat treatment at the aluminium-magnesium-silicon alloy 6063 surface were studied at room temperature and after heating to 300°C and 400°C. The aluminium alloy used in brazing applications was studied at higher temperatures up to 500°C to follow the decomposition of the aluminium oxide layer. Using the previously mentioned techniques allows to follow the diffusion, reactions and sublimation of the different elements

Focal Spot, Winter 1986

https://digitalcommons.wustl.edu/focal_spot_archives/1042/thumbnail.jp

Radiation Effects on CMOS Image Sensors With Sub-2 µm Pinned Photodiodes

CMOS image sensor hardness under irradiation is a key parameter for application fields such as space or medical. In this paper, four commercial sensors featuring different technological characteristics (pitch, isolation or buried oxide) have been irradiated with 60Co source. Based on dark current and temporal noise analysis, we develop and propose a phenomenological model to explain pixel performance degradation

A metrological inspection method using micro-CT for the analysis of drilled holes in CFRP and titanium stacks

This paper demonstrates a novel method that combines X-ray computed tomography (CT) and image processing for investigating two materials with significantly different densities. CT is increasingly used in industrial applications of inspecting materials and defects. The limitations of the system and data reconstruction are continuously researched so as to improve the quality of the results. One of the most common issues in CT is beam hardening, frequently experienced in multi-material scanning. The materials examined to demonstrate the method are carbon fibre reinforced polymers (CFRP) and titanium alloy Ti6Al4V, often used in combination in industry to optimise the weight to strength ratio. The assembly of the materials is usually achieved by bolting and riveting, which requires drilling through the two materials together. The machining of these materials is difficult due to their higher specific properties and as a result tool wear is always an issue. CFRPs properties depend on the nature, orientation and bond of the fibres and as a result drilling affects their service life. The results of the method ensure the quality of the drilled holes by measuring the variation of the maximum diameter, circularity, positioning of the hole and an examining the entrance delamination and exit burrs by image processing

Proceedings of the 15th International Workshop on Beryllium Technology (BeWS-15) September, 14-15, 2022, Karlsruhe, Germany (KIT Scientific Reports ; 7764)

The 15th International Workshop on Beryllium Technology (BeWS-15) was held as a joint event combining BeWS-15 and industrial forum BeYOND-IX on September 14-15, 2022 in Karlsruhe, Germany with great success as a hybrid event. The workshop was organized by the Karlsruhe Institute of Technology. Participants came from Germany, the US, the UK, Kazakhstan, Latvia, Czech Republic, Japan, Sweden, France and China, totaling 55 persons, which was not expected immediately after the global pandemic