Invitations to

Intended Audience This Workshop is intended to be of interest for all people involved in reactor design and material studies or showing a general interest in these topics (scientists, managers and students). All lectures will be given in English and will include the necessary background information for maximum benefit even to non-specialists. A booklet with abstracts will be issued during the registration and a book of proceedings (with abstracts and presentations) will be produced after the meeting. Venue The Workshop will take place on 23-24 October 2003 in the Auditorium of the SCKCEN Club-House, Boeretang 201, B-2400 Mol, Belgium. Improvement of Techniques for Multiscale Modelling of Irradiated Materials Network Participation People interested in participating should submit the Registration Form no later than Friday 3 October 2003. The fee for participation to this Workshop is 75 € and will be payable either in advance by bank transfer or via cheque/cash at the meeting. The fee includes: coffee breaks, lunch, drink and conference summaries. Participants from outside SCK•CEN belonging to the ITEM Network can participate at a reduced charge of 50 €. Students will be admitted free of charge, provided that they can show a suitable proof of their status. Cancellations after Friday 17 October or no-shows will be invoiced for the entire full registration fee. Announcement Workshop on Prediction of radiation damage in ferritic alloys Synergy between multiscale modelling and modelling-oriented experiments Accommodation Hotel* Corbie Mollenhof Single 62,00 45,00 Double 73,00 70,00 Phone +32 14 319871 +32 14 314533 Fax +32 14 320721 +32 14 326688 Via the E34 Exit 25 (N18) or nr. 26 (N118), in the direction of Retie. In Retie town centre, head for Mol (N18). In Dessel town centre, turn right at the second traffic lights and follow the SCK•CEN signs. Via the E313 Exit 23 (N19) or 24 (N174-n126) in the direction of Geel. After crossing the canal, direction Geel (NOT Mol); straight on until the roundabout; direction Geel (NOT Mol); at the traffic lights turn to right (direction Retie); beyond the first traffic lights, beside the church take direction left (direction Retie); after crossing the canal, take the second street on the right (= Kastelsedijk); T-fork : turn to the right (= Boeretangsedreef passes into Gravenstraat); cross the canal and follow SCK•CEN signpost. Coming from Mol town centre Head towards Turnhout. Turn left immediately after the railway crossing. Turn right at the end of the road (direction Turnhout). Turn left after the first set of lights and then follow the SCK•CEN signs. Mol can also be reached by train (www.b-rail.be/E/index.html for details). Both conference hotels are located at walking distance from the local railway station. * rates are breakfast included, prices are in EUROs (€) Hotel Reservation Forms are provided together with the Registration Form. Transport to and from SCK•CEN site will be organised for participants without personal means of transport. Registration and Information For technical programme For registration Lorenzo Malerba Nancy Van der Borgt Department RMO Department RMO Boeretang 200 Boeretang 200 B-2400 Mol, Belgium B-2400 Mol, Belgium   +32 14 33 30 07 +32 14 33 30 96   +32 14 32 12 16 +32 14 32 12 16   nvdborgt@sckcen.be lmalerba@sckcen.be www.sckcen.be Mol, Belgium, 23-24 October 2003 Hosted by The Belgian Nuclear Research Centre Motivation, scope and goal European experts from two communities, "modellers" and "experimentalists", mostly involved in the ITEM Network, will be brought together for a constructive debate on how to predict radiation damage effects in nuclear materials, focussing on ferritic steels for nuclear applications: reactor pressure vessel (RPV) steels, used in current fission power stations, and high-chromium, conventional or reducedactivation ferritic/martensitic (FM) steels, as candidate structural materials for future fusion and accelerator-driven systems (ADS). The multiscale modelling approach for the prediction of radiation effects in materials is based on the idea of linking different computational models, each dealing with a certain length and timescale and establish a detailed knowledge of the behaviour of the material at smaller scales to explain larger scale phenomena. It is hence a bottom-up, physically grounded approach. The validity of all of these models needs to be verified on their capability to predict known experimental findings. However, the stateof-the-art of multiscale modelling is limited to pure elements and a reduced number of (mostly dilute or ordered) binary alloys. On the contrary, most experimental findings regard real materials, which have been selected and are tested for precise engineering purposes, as is the case for RPV and FM steels. There is therefore still a large gap to be overcome between the capabilities of the models and the needs of the engineers. In addition, validating models used to describe radiation damage at small scales requires the use of refined advanced experimental techniques, whose output can be difficult to interpret. Some support to their interpretation can be gained by developing and optimising dedicated computational techniques, such as TEM image simulation and positron response calculation, which act as a link between pure simulation and experimental observations, allowing a feedback for the models, in a virtuous circle. The application of these techniques for the interpretation of experimental results obtained on model materials and the feedback that this approach can give to the multiscale modelling activity correspond to the idea of modelling-oriented experiments. Agenda and Speakers First Day 08.30 09.00 Registration, Coffee and Welcome 1st session: Technological Issues C. English (AEA Harwell) D. Gelles (PNNL) Chairman: A. Almazouzi (SCK•CEN) 10.30 10.45 Coffee Break 2nd session: Quantification of primary damage state in alloys D. Bacon (U. Liverpool) Chairman: L. Malerba (SCK•CEN) 11.30 3 session: Microstructural evolution of irradiated alloys F. Soisson (CEA-Saclay) Chairwoman: C. Becquart (U. Lille) 12.15 12.15 13.15 Lunch 13.15 3 session (continued): Microstructural evolution of irradiated alloys C. Becquart (U. Lille) J.-M. Perlado (UP Madrid) Chairman: C. Domain (EDF-R&D) 14.45 Coffee Break 4th session: Validation of MD and MC simulations a) Computational tools for the link between simulation and experiment rd rd Second Day 08.30 4th session: Validation of MD and MC simulations b) Modelling oriented experiments M. Hernández Mayoral (CIEMAT) J. Majima (CNRS-Vitry) A. Almazouzi (SKC•CEN) P. Pareige (U. Rouen) Chairman: C. English (AEA Harwell) 10.45 11.00 Coffee Break 5th session: Correlation between radiationinduced microstructure and hardening a) Simulation of radiation induced hardening D. Bacon (U. Liverpool) D. Rodney (U. Grenoble) Chairman: B. Devincre (Onera) Lunch 5th session (continued): Correlation between radiation-induced microstructure and hardening a) Simulation of radiation induced hardening H. Zbib (U. Washington State) B. Devincre (Onera) Chairman: D. Bacon (U. Liverpool) 14.45 15.00 Coffee Break 5th session (continued): Correlation between radiation-induced microstructure and hardening b) Experimental correlation between microstructure and mechanical property changes under irradiation Modelling-oriented experiments are necessary for the experimental validation of multiscale modelling tools. In turn, these tools need also to be upgraded to treat real materials, particularly random and non-dilute alloys containing multiple chemical elements, and the way to do this is still being debated. In addition, some questions, such as how to predict by simulation irradiation induced hardening, have still no definitive answer. Finally, a key question is the definition of the most adequate model alloy representative of the behaviour of real materials for modelling purposes, which of course will depend strictly on the concerned material and its application. In this workshop these issues, which are at the core of the experimental validation work-package of the ITEM Network, are to be tackled by discussing the efforts that are being made to upgrade the existing models for the study of complex alloys, presenting the main features of existing techniques that allow simulation and experiments to be linked and giving some example of results of recent modelling-oriented experiments. Recognised experts from outside the Network have also been invited to contribute to the meeting. 15.00 R. Schaublin (CRPP-EPFL) J. Kuriplach (CU Prague) P. Pareige (U. Rouen) Chairman: D. Gelles (PNNL) Discussion session Chairmen: C. English, D. Gelles and H. Zbib 17.00 Closure workshop 17.15 Closure first day