ESI SYSTUS allows nuclear engineers to pre-qualify new component designs in accordance with nuclear industry regulations. SYSTUS offers a complete resolution to analysis challenges in mechanics, heat transfer, and electrotechnics, and aims to help you verify the behavior of energy components – such as nozzles, primary circuit pumps, the reactor, and the steam generator, also in addition to other industrial components such as valves – during the design phase and accelerate decision-making during maintenance operations.

For shape optimization, ESI SYSTUS offers an innovative application using level sets technology.

Highlights of ESI SYSTUS 2021

THERMOMECHANICAL ANALYSES

• New labels for TRANSIENT NON LINEAR to compute automatically all the instants defining transients (thermal evolution) and load cases.
• New medium to define a pre-strain on a group of elements in order to facilitate the consideration of residual stresses.

FRACTURE MECHANICS

• Creation in Visual-Environment of a fracture mechanics post-processor for SYSTUS. It enables users to easily compute:
  • Stress Intensity Factor
  • Energy release rate

REGULATORY ANALYSES

• Creation of a new module named NEWREG for regulatory analyses in accordance with ASME and RCC-M codes, much more efficient than the existing one, integrating sub-cycles for differential method and making it possible to take into account the effects of plasticity, through the computation of the elastoplastic concentration factor Ke.

TOPAZE

• Level-set display
  • Visual-Environment enables users to display easily the iso-zero of the level-set. Physical results can also be displayed on the level-set, during the computation or at the end.
• CAE Return (Experimental)
  • Improvement of the CAE Return functionality. This function allows users to re-mesh the final shape semi-automatically from the tetrahedral mesh produced at the end of the optimization.

Please refer to SYSTUS 2021.0 English or French Release Notes and Visual-Environment 16.5 Release Notes for more details about this release.