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10 results on '"Twenhöfel C"'

1. Ranking uncertainties in atmospheric dispersion modelling following the accidental release of radioactive material

Author

Leadbetter, S.J., Andronopoulos, S., Bedwell, P., Chevalier-Jabet, K., Geertsema, G., Gering, F., Hamburger, T., Jones, A.R., Klein, H., Korsakissok, I., Mathieu, A., Pázmándi, T., Périllat, R., Rudas, Cs., Sogachev, A., Szántó, P., Tomas, J.M., Twenhöfel, C., de Vries, H., Wellings, J., Leadbetter, S.J., Andronopoulos, S., Bedwell, P., Chevalier-Jabet, K., Geertsema, G., Gering, F., Hamburger, T., Jones, A.R., Klein, H., Korsakissok, I., Mathieu, A., Pázmándi, T., Périllat, R., Rudas, Cs., Sogachev, A., Szántó, P., Tomas, J.M., Twenhöfel, C., de Vries, H., and Wellings, J.

Abstract

During the pre-release and early phase of an accidental release of radionuclides into the atmosphere there are few or no measurements, and dispersion models are used to assess the consequences and assist in determining appropriate countermeasures. However, uncertainties are high during this early phase and it is important to characterise these uncertainties and, if possible, include them in any dispersion modelling. In this paper we examine three sources of uncertainty in dispersion modelling; uncertainty in the source term, uncertainty in the meteorological information used to drive the dispersion model and intrinsic uncertainty within the dispersion model. We also explore the possibility of ranking these uncertainties dependent on their impact on the dispersion model outputs.

Published
2020
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2. Towards an improved decision-making process to better cope with uncertainties following a nuclear accident

Author

Durand, V., Maître, M., Crouaïl, P., Schneider, T., Sala, R., Marques-Nunes, P., Paiva, I., Monteiro Gil, O., Reis, M., Hilliard, C., Tafili, V., Twenhöfel, C., Van Asselt, E., Trueba, C., Montero, M., Duranova, T., Durand, V., Maître, M., Crouaïl, P., Schneider, T., Sala, R., Marques-Nunes, P., Paiva, I., Monteiro Gil, O., Reis, M., Hilliard, C., Tafili, V., Twenhöfel, C., Van Asselt, E., Trueba, C., Montero, M., and Duranova, T.

Abstract

An emergency situation is subject to multiple sources of uncertainties which should be identified in advance in order to improve the emergency and recovery management, and so optimally foster the living conditions of the population and the quality of their environment. In this context, the Work Package 4 of the European Research Project CONFIDENCE aimed at identifying and reducing uncertainties which could emerge in decision-making processes, in order to improve the preparedness and response after a nuclear accident. To that end, stakeholder panels have been set up in several European countries to collect their views and concerns regarding the decisions to be taken in the event of a nuclear crisis (e.g.evacuation, food restrictions, etc.). More particularly, the implementation of these panels allowed the researchers to (i) identify the main uncertainties that may hamper decision-making processes and to (ii) evaluate the influence of prior decisions made during the emergency phase over the medium to long-term evolution of the situation. Based on these discussions, the various types of uncertainties raised by the national panels have been analysed in order to suggest recommendations to better consider them and to improve the decision-making processes. This paper aims to detail the recommendations resulting from the panels discussions.

Published
2020
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3. Stakeholder involvement through national panels and surveys to address the issues and uncertainties arising in the preparedness and management of the transition phase

Author

Montero, M., Sala, R., Trueba, C., García-Puerta, B., Abelshausen, B., Bohunova, J., Croüail, P., Durand, V., Duranova, T., Hilliard, C., Maitre, M., Mitrakos, D., Monteiro Gil, O., Nunes, P., Paiva, I., Reis, M., Schneider, T., Skuterud, L., Smith, V., Tafili, V., Thørring, H., Turcanu, C., Twenhöfel, C., Van Asselt, E., Montero, M., Sala, R., Trueba, C., García-Puerta, B., Abelshausen, B., Bohunova, J., Croüail, P., Durand, V., Duranova, T., Hilliard, C., Maitre, M., Mitrakos, D., Monteiro Gil, O., Nunes, P., Paiva, I., Reis, M., Schneider, T., Skuterud, L., Smith, V., Tafili, V., Thørring, H., Turcanu, C., Twenhöfel, C., and Van Asselt, E.

Abstract

Under the framework of the CONFIDENCE project, work package 4 was focusing on the transition to long-term recovery, involving stakeholders in decision-making processes. The essential research was performed using a participatory approach, which combined scenario-based stakeholder discussion panels and transnational stakeholder surveys following the Delphi methodology. The objective was to identify and address the issues and uncertainties arising in the preparedness and management of the transition phase and to explore ways to facilitate the incorporation of stakeholders’ expertise, points of view and interests in the decision-making processes. The final goal was to build best practices for planning optimal remediation strategies during the transition phase considering stakeholder involvement in the decision-making process. The results obtained from the work undertaken in nine European countries are presented.

Published
2020
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4. Overview of the PREPARE WP3: management of contaminated goods in post-accidental situation – Synthesis of European stakeholders' panels

Author

Charron, S., Lafage, S., van Asselt, E., Baptista, M., van Bourgondiën, M., Brandhoff, P., Cabianca, T., Camps, J., Cessac, B., Crouail, P., Durand, V., Gallego, E., Gil, O., Holmes, S., Hourdakis, C., Jones, K., Kamenopoulou, V., Lecomte, J.F., Liland, A., Lopes, I., Madruga, M.J., Martins, J.O., Mc Mahon, C., Montero, M., Murith, C., Olyslaegers, G., Organo, C., Paiva, I., Peltonen, T., Portugal, L., Potiriadis, C., Prades, A., Reis, M., Rossignol, N., Schneider, T., Sala, R., Smith, V., Tafili, V., Teles, P., Tomkiv, Y., Trueba, C., Turcanu, C., Turtiainen, T., Twenhöfel, C., Vaz, P., Charron, S., Lafage, S., van Asselt, E., Baptista, M., van Bourgondiën, M., Brandhoff, P., Cabianca, T., Camps, J., Cessac, B., Crouail, P., Durand, V., Gallego, E., Gil, O., Holmes, S., Hourdakis, C., Jones, K., Kamenopoulou, V., Lecomte, J.F., Liland, A., Lopes, I., Madruga, M.J., Martins, J.O., Mc Mahon, C., Montero, M., Murith, C., Olyslaegers, G., Organo, C., Paiva, I., Peltonen, T., Portugal, L., Potiriadis, C., Prades, A., Reis, M., Rossignol, N., Schneider, T., Sala, R., Smith, V., Tafili, V., Teles, P., Tomkiv, Y., Trueba, C., Turcanu, C., Turtiainen, T., Twenhöfel, C., and Vaz, P.

Abstract

Recommendations and requirements for the management of foodstuffs including drinking water and feedstuffs (but not other commodities) contaminated after a nuclear accident or a radiological event have been developed by international bodies such as Codex Alimentarius Commission or European Union as well as by individual countries. However, the experience from severe nuclear accidents (Chernobyl, Fukushima) and less serious radiological events, shows that the implementation of such systems (based on criteria expressed in activity concentration) seems to be not fully suitable to prevent several difficulties such as, for instance, stigmatization and even rejection attitudes from consumers or retailers (anticipating the fears of consumers). To further investigate the possible strategies and stakeholder expectations to deal with this sensitive issue, a study has been launched within the European research project PREPARE-WP3. The overall objective of this work, coordinated is to contribute to the development of strategies, guidance and tools for the management of the contaminated products, taking into account the views of producers, processing and retail industries and consumers. For this purpose, 10 stakeholder panels from different European countries have been set up. In addition, feedback experience from the management of contaminated goods following the Fukushima accident has been provided by Japanese stakeholders. This paper highlights the key topics tackled by the different European stakeholders’ panels.

Published
2016
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5. Emergency preparedness for long lasting releases – overview and conclusions

Author

Gering, F., Gerich, B., Arnold, K., Peltonen, T., Duranova, T., Bujan, A., Duran, J., Bohun, L., Montero, M., Trueba, C., Puijker, L., Twenhöfel, C., de Vries, H., Gering, F., Gerich, B., Arnold, K., Peltonen, T., Duranova, T., Bujan, A., Duran, J., Bohun, L., Montero, M., Trueba, C., Puijker, L., Twenhöfel, C., and de Vries, H.

Abstract

The Fukushima accident has demonstrated the possibility of long-lasting releases of radionuclides from a nuclear power plant over several weeks. Within the framework of the “PREPARE” research project one work package focused on testing emergency preparedness arrangements in various countries for the special case of long lasting emissions. The aim of this study was to test whether protection strategies included in current nuclear emergency planning in various European countries could adequately reduce the radiological consequences of Nuclear Power Plant accidents with long lasting severe releases. This paper presents an overview and the conclusions of this study, more details of the work can be found in the following articles.

Published
2016
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6. Bilateral information and data exchange in case of nuclear emergencies in the German-Dutch border region

Author

Twenhöfel, C. J. W., Salfeld, H. Ch., Hable, K., and Reinen, H. A. J. M.

Abstract

Communication and exchange of accident information and monitoring data during nuclear emergencies is of crucial importance for a coherent crisis management, especially in cross border regions. In Germany and the Netherlands the need for a reliable information and data exchange for cross border emergency management was recognized and resulted in a Memorandum of Understanding between our countries. A (sub) working group of the Niederländisch-Deutsche Kommission für grenznahe kerntechnische Einrichtungen (NDKK) was formed by NLWKN, BfS and RIVM. The working group reviewed the technical requirements and operational aspects of a coherent data and information exchange between national and federal emergency centers and the state authorities. The data exchange comprises various messages, documents, measurement data and prognostic results from model calculations from the technical decision support centers of NLWKN, BfS and RIVM. Integrated accident information is available on the emergency management websites ELAN (D) and CalWeb (NL). Via regular data exchange programs and exercises special attention is given to ensure long term sustainability of the technical infrastructure and operational data exchange procedures.

Published
2007
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7. Multiplicity distributions and charged-neutral fluctuations

Author

Nayak, Tapan, Aggarwal, MM, Agnihotri, A, Ahammed, Z, Angelis, ALS, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, TC, Baba, PVKS, Badyal, SK, Baldine, A, Barabach, L, Barlag, C, Bathe, S, Batiounia, B, Bernier, T, Bhalla, KB, Bhatia, VS, Blume, C, Bock, R, Bohne, E-M, Bucher, D, Buijs, A, Buis, E-J, Büsching, H, Carlen, L, Chalyshev, V, Chattopadhyay, S, Chenawi, KE, Cherbatchev, R, Chujo, T, Claussen, A, Das, AC, Decowski, MP, Djordjadze, V, Donni, P, Doubovik, I, Dubey, AK, Dutta Majumdar, MR, Eliseev, S, Enosawa, K, Feldmann, H, Foka, P, Fokin, S, Frolov, V, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, TK, Glasow, R, Gupta, SK, Guskov, B, Gustafsson, HA, Gutbrod, HH, Higuchi, R, Hrivanacova, I, Ippolitov, M, Kalechofsky, H, Kamermans, R, Kampert, K-H, Karadjev, K, Karpio, K, Kato, S, Kees, S, Kim, H, Kolb, BW, Kosarev, I, Koutcheryaev, I, Kugler, A, Kulinich, P, Kumar, V, Kurata, M, Kurita, K, Kuzmin, N, Langbein, I, Lebedev, A, Lee, YY, Löhner, H, Mahapatra, DP, Manko, V, Martin, M, Maximov, A, Mehdiyev, R, Mgebrichvili, G, Miake, Y, Mikhalev, D, Mishra, GC, Miyamoto, Y, Mohanty, B, Morrison, D, Mukhopadhyay, DS, Myalkovski, V, Naef, H, Nandi, BK, Nayak, SK, Nayak, TK, Neumaier, S, Nianine, A, Nikitine, V, Nikolaev, S, Nishimura, S, Nomokov, P, Nystrand, J, Obenshain, FE, Oskarsson, A, Otterlund, I, Pachr, M, Parfenov, A, Pavliouk, S, Peitzmann, T, Petracek, V, Plasil, F, Purschke, ML, Raeven, B, Rak, J, Raniwala, R, Raniwala, S, Ramamurthy, VS, Rao, NK, Retiere, F, Reygers, K, Roland, G, Rosselet, L, Roufanov, I, Rubio, JM, Sambyal, SS, Santo, R, Sato, S, Schlagheck, H, Schmidt, H-R, Shabratova, G, Sibiriak, I, Siemiarczuk, T, Sinha, BC, Slavine, N, Söderström, K, Solomey, N, Sood, G, Sørensen, SP, Stankus, P, Stefanek, G, Steinberg, P, Stenlund, E, Stüken, D, Sumbera, M, Svensson, T, Trivedi, MD, Tsvetkov, A, Twenhöfel, C, Tykarski, L, Urbahn, J, Eijndhoven, NV, Heeringen, WHV, Nieuwenhuizen, GJV, Vinogradov, A, Viyogi, YP, Vodopianov, A, Vörös, S, Vos, MA, Wyslouch, B, Yagi, K, Yokota, Y, and Young, GR

Abstract

Abstract: Results from the multiplicity distributions of inclusive photons and charged particles, scaling of particle multiplicities, event-by-event multiplicity fluctuations, and charged-neutral fluctuations in 158A GeV Pb+Pb collisions are presented and discussed. A scaling of charged particle multiplicity as N part1.07±0.05 and photos as N part1.12±0.03 have been observed, indicating violation of naive wounded nucleon model. The analysis of localized charged-neutral fluctuation indicates a model-independent demonstration of non-statistical fluctuations in both charged particles and photons in limited azimuthal regions. However, no correlated charged-neutral fluctuations are observed.

Published
2001
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8. Search for disoriented chiral condensates in 158·A GeV Pb+Pb collisions

Author

Nayak, Tapan K., Aggarwal, M.M., Agnihotri, A., Ahammed, Z., Angelis, A.L.S., Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T.C., Baba, P.V.K.S., Badyal, S.K., Baldine, A., Barabach, L., Barlag, C., Bathe, S., Batiounia, B., Bernier, T., Bhalla, K.B., Bhatia, V.S., Blume, C., Bock, R., Bohne, E.-M., Bucher, D., Buijs, A., Buis, E.-J., Büsching, H., Carlen, L., Chalyshev, V., Chattopadhyay, S., Chenawi, K.E., Cherbatchev, R., Chujo, T., Claussen, A., Das, A.C., Decowski, M.P., Djordjadze, V., Donni, P., Doubovik, I., Dutta Majumdar, M.R., Eliseev, S., Enosawa, K., Feldmann, H., Foka, P., Fokin, S., Frolov, V., Ganti, M.S., Garpman, S., Gavrishchuk, O., Geurts, F.J.M., Ghosh, T.K., Glasow, R., Gupta, S.K., Guskov, B., Gustafsson, H.A., Gutbrod, H.H., Higuchi, R., Hrivnacova, I., Ippolitov, M., Kalechofsky, H., Kamermans, R., Kampert, K.-H., Karadjev, K., Karpio, K., Kato, S., Kees, S., Kim, H., Kolb, B.W., Kosarev, I., Koutcheryaev, I., Kugler, A., Kulinich, P., Kumar, V., Kurata, M., Kurita, K., Kuzmin, N., Langbein, I., Lebedev, A., Lee, Y.Y., Löhner, H., Mahapatra, D.P., Manko, V., Martin, M., Maximov, A., Mehdiyev, R., Mgebrichvili, G., Miake, Y., Mikhalev, D., Mishra, G.C., Miyamoto, Y., Mohanty, B., Morrison, D., Mukhopadhyay, D.S., Myalkovski, V., Naef, H., Nandi, B.K., Nayak, S.K., Nayak, T.K., Neumaier, S., Nianine, A., Nikitine, V., Nikolaev, S., Nishimura, S., Nomokov, P., Nystrand, J., Obenshain, F.E., Oskarsson, A., Otterlund, I., Pachr, M., Parfenov, A., Pavliouk, S., Peitzmann, T., Petracek, V., Plasil, F., Purschke, M.L., Raeven, B., Rak, J., Raniwala, S., Ramamurthy, V.S., Rao, N.K., Retiere, F., Reygers, K., Roland, G., Rosselet, L., Roufanov, I., Rubio, J.M., Sambyal, S.S., Santo, R., Sato, S., Schlagheck, H., Schmidt, H.-R., Shabratova, G., Sibiriak, I., Siemiarczuk, T., Sinha, B.C., Slavine, N., Söderström, K., Solomey, N., Sørensen, S.P., Stankus, P., Stefanek, G., Steinberg, P., Stenlund, E., Stüken, D., Sumbera, M., Svensson, T., Trivedi, M.D., Tsvetkov, A., Twenhöfel, C., Tykarski, L., Urbahn, J., Eijndhoven, N.v., Heeringen, W.H.v., Nieuwenhuizen, G.J.v., Vinogradov, A., Viyogi, Y.P., Vodopianov, A., Vörös, S., Vos, M.A., Wyslouch, B., Yagi, K., Yokota, Y., and Young, G.R.

Published
2000
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9. Evaporation residue cross sections for 40Ca + 48Ti at 25.0 and 33.9 MeV per nucleon

Author

Bootsma, T. M. V., van Nieuwenhuizen, G. J., Box, P. F., Kamermans, R., Kuijer, P. G., de Laat, C. T. A. M., Twenhöfel, C. J. W., Decowski, P., and Griffioen, K. A.

Abstract

The fusion and subsequent decay of the system 40Ca+48Ti has been studied at 25.0 and 33.9 MeV per nucleon bombarding energies. Heavy residues were detected in coincidence with light particles, and evaporation residue cross sections have been extracted. Light particle distributions are well described by a simple kinematical model, and from this the average excitation energies of the system were determined.

Published
1997
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10. First Evidence of Directed Flow at 158 A GeV Pb + Pb Collisions in WA98 Experiment

Author

Kurata, Mizuki, Collaboration, WA98, Aggarwal, M.M., Agnihotri, A., Ahammed, Z., Angelis, A.L.S., Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T.C, Baba, P.V.K.S., Badyal, S.K., Baldine, A., Barabach, L., Barlag, C., Bathe, S., Batiounia, B., Bernier, T., Bhalla, K.B., Bhatia, V.S., Blume, C., Bock, D., Bock, R., Bohne, E.-M., Bucher, D., Buijs, A., Buis, E.-J., Büsching, H., Carlen, L., Chalyshev, V., Chattopadhyay, S., Chenawi, K.E, Cherbatchev, R., Chujo, T., Claussen, A., Das, A.C., Decowski, M.P., Djordjadze, V., Donni, P., Doubovik, I., Majumdar, M.R. Dutta, Eliseev, S., Enosawa, K., Feldmann, H., Foka, P., Fokin, S., Frolov, V., Ganti, M.S., Garpman, S., Gavrishchuk, O., Geurts, F.J.M., Ghosh, T.K., Glasow, R., Guskov, B., Gustafsson, H.A., Gutbrod, H.H., Higuchi, R., Hrivnacova, I., Ippolitov, M., Kalechofsky, H., Kamermans, R., Kampert, K.-H., Karadjev, K., Karpio, K., Kato, S., Kees, S., Kim, H., Kolb, B. W., Kosarev, I., Koutcheryaev, I., Kugler, A., Kulinich, P., Kumar, V., Kurita, K., Kuzmin, N., Langbein, I., Lebedev, A., Lee, Y.Y., Löhner, H., Mahapatra, D.P., Manko, V., Martin, M., Maximov, A., Mehdiyev, R., Mgebrichvili, G., Miake, Y., Mikhalev, D., Mishra, G.C, Miyamoto, Y., Morrison, D., Mukhopadhyay, D.S., Myalkovski, V., Naef, H., Nandi, B.K., Nayak, S.K., Nayak, T.K., Neumaier, S., Nianine, A., Nikitine, V., Nikolaev, S., Nishimura, S., Nomokonov, P., Nystrand, J., Obenshain, F.E., Oskarsson, A., Otterlund, I., Pachr, M., Parfenov, A., Pavliouk, S., Peitzmann, T., Petracek, V., Plasil, F., Purschke, M.L., Raeven, B., Rak, J., Raniwala, S., Ramamurthy, V.S., Rao, N.K., Retiere, F., Reygers, K., Roland, G., Rosselet, L., Roufanov, I., Rubio, J.M., Sako, H., Sambyal, S.S., Santo, R., Sato, S., Schlagheck, H., Schmidt, H.-R., Shabratova, G., Sibiriak, I., Siemiarczuk, T., Sinha, B. C., Slavine, N., Söderström, K., Solomey, N., Sørensen, S.P., Stankus, P., Stefanek, G., Steinberg, P., Stenlund, E., Stüken, D., Sumbera, M., Svensson, T., Trivedi, M.D., Tsvetkov, A., Twenhöfel, C., Tykarski, L., Urbahn, J., Eijndhoven, N.V., Heeringen, W.H.V., Nieuwenhuizen, G.J.V., Vinogradov, A., Viyogi, Y.P., Vodopianov, A., Vörös, S., Vos, M.A., Wyslouch, B., Yagi, K., Yokota, Y., and Young, G.R.

Abstract

The first evidence of directed flow at 158 A GeV Pb + Pb collisions is observed using the Plastic Ball detector in WA98 experiment. The azimuthal angle of the total transverse energy, Φ0, is determined for each event using the observed protons in the Plastic Ball. A clear azimuthal asymmetry of fragments is observed with respect to Φ0. The degree of azimuthal asymmetry is found to be largest in mid-central collisions, which is consistent with the picture of the collective flow. The pt spectra of particles measured in the mid-rapidity spectrometer has been studied in conjunction with the Plastic Ball, and different pt slopes with respect to Φ0 for proton and π+ are observed.

Published
2013
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