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Your search keyword '"Hering, W."' showing total 90 results
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90 results on '"Hering, W."'

1. Maturation of critical technologies for the DEMO balance of plant systems

Author

Barucca, L., Hering, W., Perez Martin, S., Bubelis, E., Del Nevo, A., Di Prinzio, M., Caramello, M., D'Alessandro, A., Tarallo, A, Vallone, E., Moscato, I., Quartararo, A., D'amico, S, Giannetti, F., Lorusso, P., Narcisi, V., Ciurluini, C., Montes Pita, M.J., Sánchez, C., Rovira, A., Santana, D., Gonzales, P., Barbero, R., Zaupa, M., Szogradi, M., Normann, S., Vaananen, M., Ylatalo, J., Lewandowska, M., Malinowski, L., Martelli, E., Froio, A., Arena, P., and Tincani, A.

Published
2022
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2. Tokamak cooling systems and power conversion system options

Author

Moscato, I., Barucca, L., Bubelis, E., Caruso, G., Ciattaglia, S., Ciurluini, C., Del Nevo, A., Di Maio, P.A., Giannetti, F., Hering, W., Lorusso, P., Martelli, E., Narcisi, V., Norrman, S., Pinna, T., Perez-Martin, S., Quartararo, A., Szogradi, M., Tarallo, A., and Vallone, E.

Published
2022
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4. Experimental investigations and qualification of innovative flow sensors in the 1000 K SOLTEC-2 sodium loop

Author

Onea, A., (0000-0001-5682-2933) Krauter, N., Hering, W., Lenk, S., Ruck, S., Stieglitz, R., Gerbeth, G., Onea, A., (0000-0001-5682-2933) Krauter, N., Hering, W., Lenk, S., Ruck, S., Stieglitz, R., and Gerbeth, G.

Abstract

Liquid metals, such as sodium, have been already successfully used as heat transfer fluids (HTF) in concentrating solar power (CSP) plants up to ~550 °C. Even higher temperatures can be achieved and are envisioned for future CSP plants. The lack of measuring flow rate devices at high temperatures for liquid metals motivated this study. The present paper presents the experimental mock-up and the experimental results obtained with the SOLTEC-2 facility for two test flow sensors, one innovative eddy current flow sensor (ECFM) developed at HZDR, Germany and a built-in permanent magnet fly-wheel sensor for runs up to a sodium temperature of 700 °C. The signals of the sensors are compared also against the power level of the sodium pump.

Published
2024

6. Contributors

Author

Angeli, D., primary, Bartosiewicz, Y., additional, Bassini, S., additional, Bertocchi, F., additional, Castelliti, D., additional, Cheng, X., additional, Daubner, M., additional, De Moerloose, L., additional, De Ridder, J., additional, Degroote, J., additional, Del Nevo, A., additional, Di Piazza, I., additional, Duponcheel, M., additional, Eckert, S., additional, Fellmoser, F., additional, Forgione, N., additional, Franke, S., additional, Geffray, C., additional, Gerschenfeld, A., additional, Grishchenko, D., additional, Hering, W., additional, Hu, R., additional, Jäger, W., additional, Jeltsov, M., additional, Kennedy, G., additional, Koloszar, L., additional, Kööp, K., additional, Krauter, N., additional, Kudinov, P., additional, Lorusso, P., additional, Marinari, R., additional, Martelli, D., additional, Merzari, E., additional, Mickus, I., additional, Moreau, V., additional, Oder, J., additional, Pacio, J., additional, Pesetti, A., additional, Planquart, P., additional, Pointer, W.D., additional, Polidori, M., additional, Roelofs, F., additional, Rohde, M., additional, Rozzia, D., additional, Shams, A., additional, Spaccapaniccia, C., additional, Stalio, E., additional, Stieglitz, R., additional, Tarantino, M., additional, Thomas, J., additional, Tiselj, I., additional, Van Tichelen, K., additional, Vierendeels, J., additional, Wetzel, T., additional, and Wondrak, T., additional

Published
2019
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8. Epidural needle insertion: A large registry analysis

Author

Bomberg, H., Paquet, N., Huth, A., Wagenpfeil, S., Kessler, P., Wulf, H., Wiesmann, T., Standl, T., Gottschalk, A., Döffert, J., Hering, W., Birnbaum, J., Kutter, B., Winckelmann, J., Liebl-Biereige, S., Meissner, W., Vicent, O., Koch, T., Bürkle, H., Sessler, D. I., Raddatz, A., and Volk, T.

Published
2018
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30. Overview of the HCPB research activities in EUROfusion

Author

Hernandez, Francisco A., Arbeiter, F., Boccaccini, L.V., Bubelis, E., Chakin, V., Cristescu, I., Ghidersa, B.E., Hering, W., Jin, X.Z., Kamlah, M., Knitter, R., Kolb, M.H., Kurinskiy, P., Leys, O., Malone, I.A., Moscardini, M., Neuberger, H., Pereslavtsev, P., Pupeschi, S., Rolli, R., Ruck, S., Spagnuolo, G.A., Vladimirov, P., Zeile, C., Zhou, G., Gonzalez, M., Kiss, B., and Nadasi, G.

Subjects
Technology, ddc:600
Published
2017

36. Epidural needle insertion

Author

Bomberg, H., primary, Paquet, N., additional, Huth, A., additional, Wagenpfeil, S., additional, Kessler, P., additional, Wulf, H., additional, Wiesmann, T., additional, Standl, T., additional, Gottschalk, A., additional, Döffert, J., additional, Hering, W., additional, Birnbaum, J., additional, Kutter, B., additional, Winckelmann, J., additional, Liebl-Biereige, S., additional, Meissner, W., additional, Vicent, O., additional, Koch, T., additional, Bürkle, H., additional, Sessler, D. I., additional, Raddatz, A., additional, and Volk, T., additional

Published
2018
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38. HGF-Activities for liquid metal fast reactor systems

Author

Daubner, M., Gordeev, S., Haselbauer, M., Hering, W., Jäger, W., Onea, A., Pacio, J., Perez, S., Ponomarev, A., Rineiski, A., Sanchez, V., Wetzel, Th., Stieglitz, R., Eckert, S., Fridman, E., Gerbeth, G., Hampel, U., and Kliem, S.

Subjects
Technology, ddc:600
Published
2016
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47. Liquid metal cooled fast reactors

Author

Stieglitz, R., Hering, W., Wetzel, Th., and Tromm, W.

Subjects
ddc:620, Engineering & allied operations
Abstract

Fast spectrum reactors offer the capability for a better utilization of uranium resources. They are in principle capable to produce (“breed”) but also to transmute (“burn”) fissile materials either by means in a critical or in case of lead alloys even in a sub-critical configuration coupled with an accelerator (ADS).. Associated with the fast spectrum, they require not only a different core design but also many other technological solutions to establish a “safe reactor configuration”. Herein, especially sodium and lead (-alloy) facilitate the option to realize a compact and simple reactor design. While lead in contrast to sodium exhibits a higher neutronic efficiency associated with some often advantageous considered safety coefficients sodium cooled reactors proofed already long term operational experience and material compatibility. Irrespective of the liquid metal reactor concept chosen, liquid metals as coolant formulate new challenges with respect to thermal-hydraulics, material choice, design and system dynamics. Furthermore, the safety demonstration demands a broad validation/verification and in some cases even a modification of presently availalble physical models and technological solutions for a reliable monitoring and long term operation. After a short introduction into different kinds of some liquid metal reactor options currently developed within international programs the presentation formulates the major challenges related to the use of liquid metals addressing the thermal hydraulics and adapted instrumentation, some material issues and examples for a reliable component design. Herein, the progress attained in the recent years is shown and issues still open are elaborated. The research conducted in the frame of European R&D programs on sodium fast reactors as well as lead and LBE reactors and ADS impacted significantly their design and their operational safety. For some selected examples the safety behaviour of typical incidents in reactor operation are discussed and open issues are addressed.

Published
2015

48. Integration of new experiments into the reflood map

Author

Hering, W., Homann, Ch., and Stuckert, J.

Subjects
ddc:620, Engineering & allied operations
Abstract

The reflood map, developed in the last decade, was designed as a tool to focus on preventive and mitigative measures to prevent severe core damage scenarios and to identify research areas. In the meanwhile, additional experiments were performed and their data are available, so that an update seems necessary. For homogeneous particulate debris configurations, several experimental programs shed light on coolability. For the transition from in-core early phase to in-core late phase i.e. the loss of the rod like geometry, experimental database is still rather scarce due to the difficulty to describe the state of the core components and the fluid adequately. According to the new insight, an update of the database and the reflood map is discussed, also with respect to assess available grace times.

Published
2015
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50. Epidurale Punktion : Eine registerbasierte Analyse.

Author

Bomberg, H., Paquet, N., Huth, A., Wagenpfeil, S., Kessler, P., Wulf, H., Wiesmann, T., Standl, T., Gottschalk, A., Döffert, J., Hering, W., Birnbaum, J., Kutter, B., Winckelmann, J., Liebl-Biereige, S., Meissner, W., Vicent, O., Koch, T., Bürkle, H., and Sessler, D. I.

Subjects
ARTERIAL puncture, EPIDURAL catheters, HYPODERMIC needles, SKIN physiology, LOGISTIC regression analysis, ANESTHESIA in obstetrics, CATHETERIZATION, EPIDURAL anesthesia, OPERATIVE surgery
Abstract

Background: Dural puncture, paraesthesia and vascular puncture are the most common complications of epidural catheter insertion. Their association with variation in midline needle insertion depth is unknown.Objective: This study evaluated the risk of dural and vascular punctures and the unwanted events paraesthesia and multiple skin punctures related to midline needle insertion depth.Material and Methods: A total of 14,503 epidural catheter insertions including lumbar (L1-L5; n = 5367), low thoracic (T7-T12, n = 8234) and upper thoracic (T1-T6, n = 902) insertions, were extracted from the German Network for Regional Anaesthesia registry between 2007 and 2015. The primary outcomes were compared with logistic regression and adjusted (adj) for confounders to determine the risk of complications/events. Results are presented as odds ratios (OR, [95% confidence interval]).Main Results: Midline insertion depth depended on body mass index, sex, and spinal level. After adjusting for confounders increased puncture depth (cm) remained an independent risk factor for vascular puncture (adjOR 1.27 [1.09-1.47], p = 0.002) and multiple skin punctures (adjOR 1.25 [1.21-1.29], p < 0.001). In contrast, dural punctures occurred at significantly shallower depths (adjOR 0.73 [0.60-0.89], p = 0.002). Paraesthesia was unrelated to insertion depth. Body mass index and sex had no influence on paraesthesia, dural and vascular punctures. Thoracic epidural insertion was associated with a lower risk of vascular puncture than at lumbar sites (adjOR 0.39 [0.18-0.84], p = 0.02).Conclusion: Variation in midline insertion depth is an independent risk factor for epidural complications; however, variability precludes use of depth as a reliable guide to insertion in individual patients. [ABSTRACT FROM AUTHOR]

Published
2018
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