Results 61 to 70 of about 419,560 (212)

Axial Dispersion and Back-mixing of Gas Phase in Pebble Bed Reactor

Tikrit Journal of Engineering Sciences, 2011
Despite the worldwide attended of pebble bed reactors (PBRs), there is a lack of fundamental understanding of the complex flow pattern. In this work, the non-ideal flow behavior of the gas phase, which is used, for cooling has been investigated ...
Rahman Shnain Abdulmohsin Al-Musafir
doaj   +1 more source

Refining the timing of Middle Pleistocene (MIS 12 to MIS 6) ice advances into northern central Europe: sedimentological analysis and single‐grain luminescence dating of glaciotectonic complexes and tunnel‐valley fills

Boreas, EarlyView.
We summarize the current state of knowledge on the age of the Middle Pleistocene ice advances into northern central Europe and provide 25 new single‐grain feldspar luminescence ages of Elsterian and Saalian glacigenic sediments to constrain the age of the ice advances and their tentative correlation with marine isotope stages/substages.
Niklas von Soest, Neda Rahimzadeh, Debra Colarossi, Falko Malis, Tobias Lauer, Wera Sander‐Beuermann, Yvonne Spychala, Christian Brandes, Runa Fälber, Sumiko Tsukamoto, Jutta Winsemann   +10 more
wiley   +1 more source

Changing climates and environments within the complex Middle to Late Pleistocene fill of an overdeepened valley at Niederweningen, Switzerland

Boreas, EarlyView.
Glacially overdeepened valleys in the northern Alpine Foreland preserve Middle to Late Pleistocene sedimentary sequences that may serve as valuable archives for reconstructing past environmental changes in response to shifts in climate. This study presents a multidisciplinary analysis of two sediment cores from the overdeepened Wehntal Valley at ...
Johannes M. Miocic, Nigel Thew, Ruth Drescher‐Schneider, Hans Rudolf Graf, Marlu Kühn, Frank Preusser, Werner H. Schoch, Lucia Wick, Heinz Furrer   +8 more
wiley   +1 more source

NUCLEAR WASTE REDUCTION BY AN INTEGRATED LWR-HTR-GCFR FUEL CYCLE [PDF]

, 2010
Oggetto della presente tesi è un’analisi preliminare di un ciclo del combustibile innovativo orientato alla sostenibilità della produzione di energia per via nucleare, basato sui reattori avanzati di IV Generazione refrigerati ad elio: precisamente, il ...
BOMBONI, ELEONORA
core  

Lodge moraines: a common yet underreported end‐moraine type—a review

Boreas, EarlyView.
Lodge moraines are a distinct genetic type of end moraine formed by submarginal accretion of subglacial till; they are some of the largest end moraines in the world. Although underreported in the literature, they are of equal importance to push, dump and hummocky end moraines. End moraines are formed at glacier ice margins and show the extent of former
Mark D. Johnson, Jose Luis Antinao, Ívar Örn Benediktsson, David A. Grimley, Carrie E. Jennings, Henry M. Loope, Tom V. Lowell, David M. Mickelson, Peter L. Moore, Thomas A. Nash, J. Elmo Rawling III, Jamey Stutz   +11 more
wiley   +1 more source

Comparison between tritium breeders with pebble bed and Gyroid block configurations using numerical investigation: Flow behavior and heat transfer performance

Case Studies in Thermal Engineering
This study proposed using a Gyroid structure, a type of triply periodic minimal surface (TPMS), to replace conventional pebble bed configurations and address drawbacks such as inherently low packing fractions, extensive stress concentrations, high flow ...
Junyi Zhou, Hangyu Chen, Baoping Gong, Xiaoyu Wang, Jili Cai, Chao Cai, Yusheng Shi   +6 more
doaj   +1 more source

Single‐grain K‐feldspar luminescence dating on primary and re‐deposited aeolian sediments in Mongolia

Boreas, EarlyView.
Owing to its location in the semi‐arid region of northern Central Asia, Mongolia is highly sensitive to climate change and therefore provides an excellent setting for palaeoenvironmental research. Proxy data from different sediment types are crucial for interpreting past climate changes and landscape evolution, while burial ages provide chronological ...
Junjie Zhang, Michael Klinge, Sumiko Tsukamoto, Daniela Sauer, Manfred Frechen   +4 more
wiley   +1 more source

STUDI PEMODELAN DAN PERHITUNGAN TRANSPORT MONTE CARLO DALAM TERAS HTR PEBBLE BED

Jurnal Penelitian Fisika dan Aplikasinya, 2016
Konsep sistem energi VHTR baik yang berbahan bakar pebble (VHTR pebble bed) maupun blok prismatik (VHTR prismatik) menarik perhatian fisikawan reaktor nuklir. Salah satu kelebihan teknologi bahan bakar bola adalah menawarkan terobosan teknologi pengisian
Zuhair Zuhair
doaj  

Fission Product Transport and Source Terms in HTRs: Experience from AVR Pebble Bed Reactor

Science and Technology of Nuclear Installations, 2008
Fission products deposited in the coolant circuit outside of the active core play a dominant role in source term estimations for advanced small pebble bed HTRs, particularly in design basis accidents (DBA).
Rainer Moormann
doaj   +1 more source

1170. Allium kollmannianum Brullo, Pavone & Salmeri

Curtis's Botanical Magazine, EarlyView.
Summary Allium kollmannianum is a small, late‐spring to early‐summer blooming Allium, endemic to the Negev Desert in south Israel, and previously thought to be extremely rare and critically endangered. Here we expand new information regarding its distribution and habitat in the Negev Desert, and a new estimation of its threat level, considering the new
Dar Ben‐Natan, Irene Blecher
wiley   +1 more source