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731 results on '"Grundmann, U."'

4. List of Contributors

Author

Abraham, M., primary, Aggarwal, R., additional, Ali, Z., additional, Amudhan, S., additional, Babi, M.-A., additional, Bansal, S., additional, Bergese, S.D., additional, Bhagat, H., additional, Bharadwaj, S., additional, Bharti, S.J., additional, Bhatnagar, S., additional, Bidkar, P.U., additional, Bilotta, F., additional, Bithal, P.K., additional, Bonhomme, V., additional, Borozdina, A., additional, Defresne, A., additional, Dube, S.K., additional, Echeverría, M., additional, El Beheiry, H., additional, Erb, S., additional, Fàbregas, N., additional, Fagoni, N., additional, Farag, E., additional, Fiorda-Diaz, J., additional, Ganjoo, P., additional, Gobbo, M., additional, Gorji, R., additional, Grover, V.K., additional, Grundmann, U., additional, Gupta, D., additional, Gupta, N., additional, Hahn, R.G., additional, Hassan, N., additional, Ida, M., additional, James, M.L., additional, Jangra, K., additional, Kalaivani, M., additional, Kamal, V.K., additional, Kannaujia, A., additional, Kapoor, I., additional, Kawaguchi, M., additional, Khanna, A.K., additional, Khan, S.A., additional, Kla, K.M., additional, Krishnamoorthy, V., additional, Kulkarni, D.K., additional, Lalwani, S., additional, Latronico, N., additional, Lee, L.A., additional, Lele, A., additional, Lubnin, A.Yu, additional, Luthra, A., additional, Mahajan, C., additional, Mahajan, S., additional, Manninen, P.H., additional, Marda, M., additional, Mariappan, R., additional, Marson, A., additional, Martin, Y.N., additional, Mitra, R., additional, Mohapatra, S., additional, Moningi, S., additional, Monteiro, J.N., additional, Naqash, I., additional, Nicholson, W.T., additional, Oetliker, C., additional, Padmaja, D., additional, Panda, N.B., additional, Panebianco, M., additional, Pasternak, J.J., additional, Popugaev, K.A., additional, Porcella, L., additional, Prabhakar, H., additional, Rabai, F., additional, Radhakrishnan, M., additional, Rajan, S., additional, Ramani, R., additional, Ramesh, V.J., additional, Rao, S., additional, Rath, G.P., additional, Sahu, S., additional, Saigal, D., additional, Salvador, L., additional, Sandhu, K., additional, Satya Prakash, M.V.S., additional, Sethuraman, M., additional, Sharma, S., additional, Sharpe, E.E., additional, Sidani, M., additional, Singhal, V., additional, Singh, G., additional, Singh, G.P., additional, Singh, S., additional, Souter, M.J., additional, Sriganesh, K., additional, Srivastava, S., additional, Steiner, L.A., additional, Stoicea, N., additional, Swain, A., additional, Tandon, M.S., additional, Thota, S.S., additional, Traul, D.E., additional, Tripathy, S., additional, Umamaheswara Rao, G.S., additional, Upadhyay, A.D., additional, Venkatraghavan, L., additional, Vinay, B., additional, Welch, T.L., additional, Y. Yeoh, T., additional, and Žurek, J., additional

Published
2017
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43. The HEXNEM3 nodal flux expansion method for the hexagonal geometry in the code DYN3D

Author

Bilodid, Y., Grundmann, U., Kliem, S., Bilodid, Y., Grundmann, U., and Kliem, S.

Abstract

This paper describes the derivation of the nodal flux expansion method HEXNEM3, its implementation into the nodal diffusion code DYN3D and the corresponding testing versus benchmarks. As in the earlier versions of expansion method HEXNEM1 and HEXNEM2, the neutron flux in a hexagonal node is expanded into superposition of orthogonal polynomials and exponential functions. The main difference of the HEXNEM3 method is the additional use of tangentially weighted exponential functions and the coupling of neighboring nodes by tangentially weighted fluxes and currents on node surfaces. The HEXNEM3 method was tested in several benchmark problems, including numerical benchmarks with given cross sections set and reference solutions by fine-mesh finite difference diffusion and a real plant benchmark with Monte Carlo reference solution. The test results demonstrate good agreement with reference solutions and improvement of method accuracy in comparison with HEXNEM1 and HEXNEM2.

Published
2018

45. Narkose zur Elektrokrampftherapie

Author

Grundmann U and Schneider So

Subjects
Mechanical ventilation, Neuromuscular Blockade, medicine.diagnostic_test, business.industry, Sedation, medicine.medical_treatment, Physical examination, General Medicine, behavioral disciplines and activities, Anesthesiology and Pain Medicine, Electroconvulsive therapy, Intravenous anesthesia, Anesthesia, mental disorders, Anesthetic, Medicine, medicine.symptom, business, medicine.drug, Preanesthesia evaluation
Abstract

Electroconvulsive therapy (ECT) has been shown to be an effective and safe nonpharmacological treatment modality for a variety of severe neuropsychiatric disorders. Today, it is in worldwide use in both inpatient and outpatient settings. While ECT was originally performed without sedation or anesthesia, nowadays a “modified technique” is most often used with intravenous anesthesia, neuromuscular blockade, and mechanical ventilation providing more safety and less patient's subjective unpleasantness along with reduced adverse side effects. To minimize risks, ECT requires close interdepartmental cooperation between psychiatrists and anesthetists. In the preanesthesia evaluation of ECT, a thorough history and physical examination are obligatory and the patient's medical condition should be optimized. Anesthesia should be provided by an anesthetist familiar with both the effects of the anesthetic drugs on the ECT response and the physiologic alterations that may occur during the procedure as well as their specific treatment.

Published
2013
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46. The reactor Dynamics code DYN3D – models, Validation and applications

Author

Rohde, U., Kliem, S., Grundmann, U., Baier, S., Bilodid, Y., Duerigen, S., Fridman, E., Gommlich, A., Holt, L., Grahn, A., Kozmenkov, Y., Mittag, S., Rohde, U., Kliem, S., Grundmann, U., Baier, S., Bilodid, Y., Duerigen, S., Fridman, E., Gommlich, A., Holt, L., Grahn, A., Kozmenkov, Y., and Mittag, S.

Abstract

The article provides an overview on the reactor dynamics code DYN3D. The code comprises various 3D neutron kinetics solvers, a thermal-hydraulics reactor core model and a thermo-mechanical fuel rod model. The implemented models and methods and the capabilities and features of the code are described. Latest developments of models and methods are delineated. An overview on the status of verification and validation is given. Code applications for selected safety analyses are described. Furthermore, multi-physics code couplings to thermal-hydraulic system codes, CFD and sub-channel codes as well as to the fuel performance code TRANSURANUS are outlined. Developments for innovative reactor concepts, in particular Molten Salt Reactor, High Temperature Gas-cooled Reactor and Sodium Fast Reactor are delineated. The management of code maintenance is briefly described.

Published
2016

49. A trigonal nodal solution approach to the multi-group simplified P3 equations in the reactor code DYN3D

Author

Duerigen, S., Grundmann, U., Mittag, S., Merk, B., Fridman, E., and Kliem, S.

Subjects
trigonal, nodal method, SP3, simplified P3, hexagonal, Physics::Chemical Physics, triangular
Abstract

The neutronics model of the nodal reactor dynamics codeDYN3D developed for 3-D analyses of steady states and transients in light-water reactors has been extended by a simplified P3 (SP3) neutron transport option to overcome the limitations of the diffusion approach. To provide a method being applicable to reactors with hexagonal fuel assemblies and furthermore allowing flexible mesh refinement, the nodal SP3 method has been developed on the basis of a flux expansion in trigonal-z geometry. In this paper, the derivation of the trigonal SP_3 method is presented and preliminary assessment of the methodology is performed.

Published
2011

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