ENERGY

Engineering Services for Energy

ESI has long-standing experience in consulting and engineering services with leaders in nuclear power worldwide. Our Quality Assurance program was established to meet the stringent needs of the nuclear industry. In addition to our ISO 9001 certification we comply with strict standards for nuclear application such as 10CFR50, NQA1, Q-N-100 and Q-N-300 (specific to AREVA), and SGAQ (specific to EDF).

PROVE CONFORMITY WITH REGULATIONS Complex Thermo-Hydraulic and Thermo-Mechanic Analyses 3D Mesh of a COMEX NUCLEAIRE (CxN) completed in collaboration with ESI the Behavior Steam Generator’s bottom part. “Analysis Report for Replacement Steam Generators (RSG) provided by Mitsubishi Heavy Industries, Ltd. (MHI) for EDF French nuclear power plants. This notable work was carried out with a high level of quality using innovative approaches, such as SYSTUS functionalities allowing to complete 3D numerical models with as few hypotheses as possible. These studies include both complex thermo-hydraulic and thermo-mechanic analyses in order to demonstrate the equipment’s full conformity with French nuclear Thermo-hydraulic analysis in the water downcomer. regulation.

” Courtesy: COMEX Nucléaire Dr. François Billon, Technical Director and Director of the MHI-CxN Partnership

OPTIMIZE WELDING SIMULATION MUSICA Project: Realistic Multi-Pass Welding Simulation AREVA test case. Simulation of components welded on a large ESI provides assistance to AREVA for the simulation of components welded on a large pressure vessel. pressure vessel. This work is carried out within the MUSICA Project involving CEA, Courtesy: Areva AREVA, Institut de Soudure, CETIM and ESI for the development and commercialization of simulation software for welding. This partnership aims at delivering robust simulation tools incorporating the thermal, metallurgical and mechanical behavior of metals, as well as certain chemical aspects for efficient and reliable modeling of the welding processes.

Challenge: Validation of a fast and accurate 3D simulation methodology applied to a tube penetration attachment welded on a hemispherical head of a large ferritic pressure vessel.

Benefits: • Thermo-mechanical computation leading to the development of a technique enabling accurate prediction of residual stresses. • Time savings by a factor of 4 compared to a standard step-by-step simulation method. Lid of 900MWe reactor vessel. • Reduction of distortions induced by the welding process in the tube. Courtesy: Areva, R.Quatrain

www.esi-group.com Copyright © ESI Group 2009 - G/RO/09.101/A [email protected] • Very good predictions ofthedistortions correlated by experiments. • Validation ofthemethodologyto simulate theVATS mock-up. Benefits: The system shall bebuiltinaccordance withRCC –MR2007 French Nuclear Code. accuracy, welding distortions andachievable tolerances. A refined and difficult study due to critical issues of fabrication technology: dimensional Challenges: research project. ESI supports AREVA and other industrial companies worldwide in the ITER international tokamak vessel andover 16times the mass. existing largest the of dimensions linear the twice than more be will vessel ITER The first operate electricity-producing plant. the and design tonecessary data the gather tocouldis showfusion ITER of tousedaim generatebe The electrical power, toand D E D L E W E RG A L F Electron Beam Welding for the O ES R I O L I B M AV E H E SS B A T C I D E R P •  •  Benefits: • Kineticsofcrack extension crack andductile growth simulation. •  Challenges: weldment. accuratelycrackmodel crack as structureswellanalysis in as propagation bimetallic in to ESI on is relying field electro-nuclearengineering the in leaderworld the case, this applicabilitytodevelopassociatedof and domain softwareextendtheir packages.In devoting large efforts to improve the accuracy of the fracture constantly mechanics methods, is to Therefore AREVA plants. power nuclear of profitability the and safety forthe issue key a is components of integrity the resistanceand aging the Assessing N I RG A M Y T Fracture E MechanicsAnalyses to Control Degradation Mechanisms F A S ESS SS A seismic analysis... dimension ofthecrack. computations. plcblt t ohr rjcs uh s rmr cmoet, ue lts pumps, plates, tube components, primary as such projects other to Applicability and orientation position, the rapidly study to methodology a of Development thermal to adaptation automatic with geometries cracked complex Mesh ITER F. +33 (0)153 651412 T. +33 (0)153 6514 FRANCE 75015 Paris 100-102 Avenue deSuffren ESI Group Headquarters Vacuum Vessel Manufacturing .esi-gr om co . p u ro g - i s e w. w w Simulation ofCrack Propagation inWeldment. Crack analysis ofcomponents. in whichstrong magnetic Courtesy: AREVA DCNS, components assembled Technology Segment the Vessel Advanced by longitudinal and circular Electron Courtesy: Areva fields confine a fusion plasma. ITER Tokamak, (VATS) 55 incl. torus-shaped Beam welds. Assembly of