Ultrasonic Inspection of Hydrogen Flakes in Large Forgings: From Qualification to Site Inspection

2016 ◽  
Author(s):  
Dominique Moussebois ◽  
Patrick Ancrenaz
Keyword(s):  
Steam Generator ◽  
Ultrasonic Inspection ◽  
Lessons Learned ◽  
Ultrasonic Beam ◽  
Large Numbers

During 2012 RPVs inspections, nearly-laminar indications were detected in the lower and upper core shells of Doel 3 and Tihange 2 RPVs. As a consequence, the Doel 3 and Tihange 2 NPPs have to stay in cold shutdown until it was proved that they can be safely operated. The performance and capability of the applied UT technique to detect and characterize hydrogen flakes had to be confirmed. To achieve this objective, extensive investigations were launched on blocks extracted from a steam generator shell known for containing hydrogen flakes. The paper describes the UT validation performed and the results of the destructive tests which enable to demonstrate the capability of a straight ultrasonic beam to detect and size nearly laminar indications and to correctly identify ligaments between two adjacent indications. It addresses the formal extension of qualification performed by correlating UT measurements acquired on a large numbers of real hydrogen flakes, simulations of UT responses and destructive examinations. Lessons learned from the experiments are finally described.

Ultrasonic Inspection of Liquid-Metal Fast Breeder Reactor Steam Generator Duplex Tubing

1980 ◽  
Vol 47 (2) ◽  
pp. 257-267
Author(s):  
K. J. Longua ◽  
G. K. Whitham ◽  
C. C. Allen
Keyword(s):  
Liquid Metal ◽  
Steam Generator ◽  
Ultrasonic Inspection ◽  
Fast Breeder Reactor

A Case Study of Sesame Workshop’s Cleaner, Happier, Healthier Intervention in Bangladesh, India, and Nigeria: Reporting on Exposure and Impact

2017 ◽  
Author(s):  
Dina L. G. Borzekowski
Keyword(s):  
Behavioral Outcomes ◽  
Public Service Announcements ◽  
Lessons Learned ◽  
Valuable Insight ◽  
Future Health ◽  
Broadcast Television ◽  
Large Numbers ◽  
Hygiene Intervention ◽  
Insight Into

The Cleaner, Happier, Healthier hygiene intervention was developed and tested in 2013, featuring the Sesame Workshop characters. Through broadcast television, four public service announcements (PSAs) addressed washing hands with soap, using a latrine, wearing sandals, and drinking clean water. The main audiences were young preschool children and their parents or guardians. Research occurred in Bangladesh, India, and Nigeria, exploring the reach and impact of these PSAs. Although low percentages, from well-drawn samples of extremely vulnerable populations in these countries, reported awareness and recall of these messages, such percentages can reflect large numbers of viewers. Considering data from the participating children, measures of knowledge and attitudes were associated with engaging in several of the behavioral outcomes. As well, awareness and recall of the PSA messages predicted “all the time” for several of the hygiene behaviors. In contrast, parents’ reports of PSA awareness and recall were not associated with reports of children’s hygiene behaviors. Conducting reach studies is extremely difficult, especially in developing countries and communities. Despite the challenges, this study is encouraging. Participants reported seeing the messages, and in several models, this “reach” predicted reports of hygiene and health behaviors. Lessons learned from this case study and research can offer valuable insight into the production of future health PSAs, especially with harder-to-reach populations.

scholarly journals Rapid response infrastructure for pandemic preparedness in a tertiary care hospital: lessons learned from the COVID-19 outbreak in Cologne, Germany, February to March 2020

2020 ◽  
Vol 25 (21) ◽  
Author(s):  
Max Augustin ◽  
Philipp Schommers ◽  
Isabelle Suárez ◽  
Philipp Koehler ◽  
Henning Gruell ◽  
...  
Keyword(s):  
Tertiary Care ◽  
Epidemiological Data ◽  
Lessons Learned ◽  
Rapid Response ◽  
Care Hospital ◽  
Emergency Rooms ◽  
Pandemic Preparedness ◽  
Effective Response ◽  
Large Numbers ◽  
Outpatient Departments

The coronavirus disease (COVID-19) pandemic has caused tremendous pressure on hospital infrastructures such as emergency rooms (ER) and outpatient departments. To avoid malfunctioning of critical services because of large numbers of potentially infected patients seeking consultation, we established a COVID-19 rapid response infrastructure (CRRI), which instantly restored ER functionality. The CRRI was also used for testing of hospital personnel, provided epidemiological data and was a highly effective response to increasing numbers of suspected COVID-19 cases.

Facilitating Linguistic and Academic Success for Newcomer English Language Learners

2019 ◽  
pp. 218-234
Author(s):  
Melinda Trice Cowart
Keyword(s):  
United States ◽  
English Language Learners ◽  
Academic Success ◽  
Language Learners ◽  
English Language ◽  
Educational Achievement ◽  
The United States ◽  
Lessons Learned ◽  
Large Numbers ◽  
Republic Of The Congo

The landscape of peoples in need has changed dramatically and appears to grow more complex. For today, leaders and citizens in the United States must decide how best to address the needs and aggregate issues related to the very large numbers of refugees from the Democratic Republic of the Congo, Burma, Iraq, Bhutan, Somalia, Syria, and numerous other nations fleeing persecution owing to their political or religious beliefs. Complicating the challenges encountered by newcomer English language learners (ELLs) and their teachers is the wave of xenophobia that has once again had a global impact. Gleaning lessons learned from previous United States refugee resettlement programs about the societal adjustment and educational achievement experienced by refugees from Southeast Asia, from the Cuban Haitian program, from the resettlement of the Karen and Chin Burmese, and others will empower teachers to facilitate greater academic achievement among newcomer ELLs.

Medical Consequences of Terrorism, Conflict and Civil Unrest

1986 ◽  
Vol 2 (1-4) ◽  
pp. 63-68 ◽  
Author(s):  
Barry S. Sidenberg
Keyword(s):  
High Velocity ◽  
Lessons Learned ◽  
Blast Injuries ◽  
Sharp Rise ◽  
Civil Unrest ◽  
Large Numbers ◽  
Practice Of Medicine ◽  
Different Characteristics ◽  
The Military ◽  
Multiple Fragment

There are over 25 active insurgencies in progress worldwide today. Terrorism is often part of these actions. But terrorism is also found worldwide in areas where no active insurgency exists. There has been a sharp rise in terrorist activities in the last five years, and there will continue to be an increase in such activities in the future.Bombs, in various assortments, are the favorite weapons of terrorists. When guns are utilized, they are often of the military type and produce subsequent high velocity missile injuries which have entirely different characteristics than the normal type of handgun injury encountered in the civilian practice of medicine. The type of wounds produced by bombings include blast injuries, burns, multiple fragment injuries, blunt trauma, and major mutilation to include amputation. High velocity missile injuries produced by the use of various military rifles and submachine guns require treatment by a surgeon knowledgeable in the care of such wounds. Surgical lessons learned by military surgeons dating back to the time of Napoleon's surgeon Larrey are discussed in some detail in the article. Special considerations attending to medical care associated with terrorist activities are highlighted. Such consequences include multi-system trauma to an individual, trauma to large numbers of individuals at one time, massive trauma to individuals, and the difficulty in treating and evacuating victims who are trapped in rubble.

Study on Ultrasonic Beam Behavior in Nickel-Based Austenitic Weldments

2010 ◽  
Author(s):  
Jing Ye ◽  
Hak-Joon Kim ◽  
Sung-Jin Song ◽  
Sung-Sik Kang ◽  
Kyungcho Kim ◽  
...  
Keyword(s):  
Ultrasonic Inspection ◽  
Base Material ◽  
Coarse Grained ◽  
Beam Model ◽  
Ultrasonic Beam ◽  
Simulation Results ◽  
Anisotropic Elastic ◽  
Scan Data ◽  
2D Fft ◽  
Different Parts

Nickel-based austenitic weldments are widely used in steam generator, however it’s difficult for inspection because of its inhomogeneous and anisotropic elastic behaviors. The anisotropic and heterogeneous characteristics of austenitic welds together with a coarse-grained structure (elongated and oriented grains) lead to the following phenomena: scattering, attenuation, skewing, splitting, and divergence of the ultrasonic beam. To improve the ultrasonic inspection, beam behavior in weld need to be understood theoretically and experimentally. For that purpose, water immersed C-scans have been performed with respect to different parts (base material, austenite weld) of the weldments using one 5MHz transducer as transmitter at one side of the specimen and one 5MHz pinducer on the other side as receiver. Beam skewing and splitting is observed, 2D FFT are performed to obtain scan image in frequency domain and echodynamic curve is extracted from the C-scan data. The experiments results are also compared with the simulation results using multi-Gaussian beam model.

scholarly journals Lessons learned from bugs in models of human history

2020 ◽  
Author(s):  
Aaron P. Ragsdale ◽  
Dominic Nelson ◽  
Simon Gravel ◽  
Jerome Kelleher
Keyword(s):  
Population Genetic ◽  
Population Genomics ◽  
Lessons Learned ◽  
Genetic Models ◽  
Human History ◽  
Software Developers ◽  
Demographic Models ◽  
Large Numbers ◽  
Genomic Regions ◽  
Made In

AbstractSimulation plays a central role in population genomics studies. Recent years have seen rapid improvements in software efficiency that make it possible to simulate large genomic regions for many individuals sampled from large numbers of populations. As the complexity of the demographic models we study grows, however, there is an ever-increasing opportunity to introduce bugs in their implementation. Here we describe two errors made in defining population genetic models using the msprime coalescent simulator that have found their way into the published record. We discuss how these errors have affected downstream analyses and give recommendations for software developers and users to reduce the risk of such errors.

Experiences and lessons learned from six years of government-led inland aquaculture development projects in northwest Namibia, 2004-2009.

2020 ◽  
Author(s):  
Panduleni Ndinelago Elago
Keyword(s):  
Poverty Reduction ◽  
Fish Farming ◽  
Lessons Learned ◽  
Small Scale ◽  
Fish Farms ◽  
Extension Services ◽  
Freshwater Aquaculture ◽  
Large Numbers ◽  
The Government ◽  
Aquaculture Development

Abstract The Government of Namibia addresses food security and poverty reduction through the development of rural sectors, including fisheries and aquaculture. Freshwater aquaculture is recognized as a potential target for sustainable development. The Government of Namibia, together with the Government of Spain signed an agreement in 2003 to establish the Inland Aquaculture Centre (IAC), to demonstrate the possibilities of fish farming activities in the northwest of Namibia and in the country at large. Seven hundred new small-scale fish farms (SSFF's) were identified to participate in fish farming activities. Around 300+ farmers received an approximate total of 550,000 fingerlings over 5 years. With the extension of the project in 2007-2009 through strengthening of extension services on inland aquaculture development, under the 'Aquaculture in Northern Namibia' (ANN) Project umbrella, an extra 100 or more new farmers were identified. Results show that the extension services managed to assist in fish harvests for 114 SSFF's with 9560 kg of tilapia and 1556 kg of catfish harvested. The project's findings highlighted difficulties in accurately measuring fish production. Most fish farmers are located in a region where they only have enough water for fish culture during 5 months of the year. Also, many of the ponds they were using were incorrectly constructed and not suitable for fish farming. Farms in areas such as these, in hindsight, were unrealistic targets for aquaculture development, and it is the opinion of the author that it is important to re-direct effort and resources towards those able to farm with a good water supply for at least 10-12 months of the year. As of July 2010 the question remains unanswered; can fish farming in northwest Namibia be sustainable and economically viable with the current level of government extension, infrastructure and locally available resources? The author suggests that this will be possible in the next 5 years, once the government, together with the private sector and NGOs join to re-assess their current sets of objectives, which are, at present, too ambitious. Improvements could be made by implementing a better strategy, directing resources at a smaller number of sustainable, successful fish farmers rather than a larger number that include more inefficient farms. Large numbers of farms look good in policy documents, but spreading resources widely and inefficiently results in reduced net production and sustainability in the mid- to long-term.

scholarly journals Mobilising a workforce to combat COVID-19: An account, reflections, and lessons learned

2020 ◽  
pp. 175114372097154
Author(s):  
Jennifer Doyle ◽  
Eleanor MJS Smith ◽  
Christopher JR Gough ◽  
Aaminah Haq ◽  
Charlotte Willis ◽  
...  
Keyword(s):  
Intensive Care ◽  
Intensive Care Units ◽  
Medical Staff ◽  
High Capacity ◽  
Lessons Learned ◽  
Staff Members ◽  
Large Numbers ◽  
Extensive Range

With the declaration of coronavirus 2019 (COVID-19) as a pandemic, intensive care units across the globe began to prepare for large numbers of patients. For many years, UK Intensive Care Units (ICUs) have been at high capacity, while facing staffing shortages. In order to prepare for the predicted increased work caring for large numbers with COVID-19, staff were redeployed from other clinical areas to help. Many of these staff had no previous ICU experience. In this article, we share our experiences redeploying medical staff from an extensive range of backgrounds, and how we utilised those staff to maximise use of their existing skills, together with reflections from a variety of redeployed staff members.

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