Results 261 to 270 of about 147,390 (303)

Prediction and mitigation of disruptions in ASDEX Upgrade

Journal of Nuclear Materials, 2001
Abstract Disruptions in tokamaks are instabilities events which can damage the machine components. The avoidance and mitigation of these events is desirable in present machines as well as in Next Step devices (such as ITER). A neural network has been developed to predict the occurrence of disruptions caused by edge cooling mechanisms in ASDEX Upgrade.
Pautasso, G., Egorov, S., Tichmann, C., Fuchs, J., Herrmann, A., Maraschek, M., Mast, K., Mertens, V., Perchermeier, J., Windsor, C., Zehetbauer, T., ASDEX Upgrade Team   +11 more
openaire   +3 more sources

Mitigating manifest supply chain disruptions

The TQM Journal, 2019
PurposeThe purpose of this paper is to understand if organizations can leverage recovery/continuous improvement (RCI) capabilities and two competencies to mitigate manifest supply chain (SC) disruptions. Specifically, the authors examine how learning from previous experience and SC disruption-orientation affects organizations’ capability to recover ...
Jason M. Riley, Richard Klein, Janis Miller, V. Sridharan   +3 more
openaire   +1 more source

The Crossover Point: Comparing Policies to Mitigate Disruptions

2013
Companies, industries, and nations often consume resources supplied by unstable producers. Perturbations that affect the supplier propagate downstream to create volatility in resource prices. Consumers can invest to reduce this insecurity in two ways; invest in and impose security on the suppliers, or can invest in self-sufficiency so that shocks no ...
Matthew Antognoli, Marshall A. Kuypers, Z. Rowan Copley, Walter E. Beyeler, Michael D. Mitchell, Robert J. Glass   +5 more
openaire   +1 more source

Control, detection and mitigation of disruptions on ITER

2015 IEEE 26th Symposium on Fusion Engineering (SOFE), 2015
The fast loss of thermal and magnetic energy during an unmitigated disruption in ITER can lead to heat fluxes exceeding melt thresholds for plasma facing components, can generate high electromagnetic loads in some cases close to the design limits, and can potentially cause the generation of high energy runaway electrons.
M. Lehnen, D.J. Campbell, S. Maruyama, J.A. Snipes, P.C. de Vries, L. Zabeo   +5 more
openaire   +1 more source

Information Dependency in Mitigating Disruption Cascades

Manufacturing & Service Operations Management
Problem definition: Shocks that trigger supply chain disruptions inflict initial losses by damaging firms’ assets. The disruption can then cascade when an affected firm fails to deliver to its buyer, thereby interrupting the buyer’s operations, and continue thus across multiple levels (tiers) in the supply chain.
Nitin Bakshi, Shyam Mohan
openaire   +1 more source

Disruptions in ITER and strategies for their control and mitigation

Journal of Nuclear Materials, 2015
Abstract The thermal and electromagnetic loads related to disruptions in ITER are substantial and require careful design of tokamak components to ensure they reach the projected lifetime and to ensure that safety relevant components fulfil their function for the worst foreseen scenarios. The disruption load specifications are the basis for the design
Lehnen, M., Aleynikova, K., Aleynikov, P.B., Campbell, D.J., Drewelow, P., Eidietis, N.W., Gasparyan, Yu., Granetz, R.S., Gribov, Y., Hartmann, N., Hollmann, E.M., Izzo, V.A., Jachmich, S., Kim, S.-H., Kočan, M., Koslowski, H.R., Kovalenko, D., Kruezi, U., Loarte, A., Maruyama, S., Matthews, G.F., Parks, P.B., Pautasso, G., Pitts, R.A., Reux, C., Riccardo, V., Roccella, R., Snipes, J.A., Thornton, A.J., de Vries, P.C.   +29 more
openaire   +2 more sources

Disruption Physics and Mitigation on DIII-D

Fusion Science and Technology, 2005
The contributions of the DIII-D tokamak toward the understanding and control of disruptions are reviewed. Disruptions are found to be deterministic, and the underlying causes of disruption can therefore be predicted and avoided. With sufficiently rapid detection, possible damage from disruptions can be mitigated using an understanding of disruption ...
D. G. Whyte, D. A. Humphreys, A. G. Kellman   +2 more
openaire   +1 more source

Effectiveness of policies for mitigating supply disruptions

International Journal of Physical Distribution & Logistics Management, 2013
PurposeThe purpose of this paper is to examine supply‐side disruptions in a supply chain, and to analyse the effectiveness of two inventory‐based policies for mitigating the impact of supply disruptions: maintaining strategic inventory reserves (the R‐policy), and using larger orders (the Q‐policy).Design/methodology/approachThe paper assess the ...
Joong Y. Son, Ryan K. Orchard
openaire   +1 more source

Disruptions – a proposal for their mitigation by runaway suppression

Journal of Nuclear Materials, 2003
Abstract The avoidance of disruptions is essential for the next generation tokamaks. The dangerous consequences of disruptions are excessive heat loads, high forces, creation of high-energy runaway electrons, and a bad conditioning for the start of the following discharge.
K.H. Finken, A. Kraemer-Flecken, M. Lehnen, A. Savtchkov   +3 more
openaire   +1 more source

ITER disruption mitigation technologies and beyond

2015 IEEE 26th Symposium on Fusion Engineering (SOFE), 2015
ITER is designed to withstand a certain number of full scale plasma disruptions; each disruption event can induce excessive thermal loads, electromagnetic (EM) loads, and runaway electrons (REs) onto the vacuum vessel and invessel components. The consequences of unmitigated events are extremely serious in terms of reduced component lifetime and ...
S. Maruyama, G. Kiss, F. Villers, Y. Yang, M. Lehnen, L.R. Baylor, M.S. Lyttle, S.J. Meitner, D.A. Rasmussen   +8 more
openaire   +1 more source