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Simulation Software & Services for Power Generation

Nuclear Power Generation

Nuclear Power PlantSince its inception in the early 1970's, ANSYS FEA and CFD software has been the preferred simulation tool in the nuclear power industry by providing the FEA and CFD tools required in meeting the rigorous design, engineering and regulatory challenges of the nuclear industry as well as standards such as ASME NQA-1, Quality Assurance Requirements for Nuclear Facility Applications, ASME Boiler & Pressure Vessel Code Section III, Subsection NF and ISO-9001.

With its long-term association with ANSYS, SimuTech has been providing FEA and CFD software and consulting services to the nuclear power industry for decades. SimuTech has available an internal QA program developed to the standards of ASME NQA-1. This QA plan was developed in preparation for a large Div1/Div2 stress analysis project for a 1st tier designer/supplier of nuclear pressure vessel equipment.


containment building
Containment Building Reinforcement
pedestal
Generator Pedestal
core duct
Core Duct

Our engineers have considerable experience in the nuclear power industry including small and large ASME pressure vessel analysis projects and would be glad to discuss your needs.

SimuTech Consulting Projects in the Nuclear Power Industry:

  • Crash test of nuclear waste containers falling from moving rail car
  • Plutonium & Uranium (PUREX) waste sludge extraction device structural analysis: remote attach assembly mechanism for slip fit
  • ASME Section III, Subsection NB Structural/Thermal Evaluation - Evaluation of steam generator primary head for all plant operating conditions plus seismic
  • Heavy Lift Load Evaluation per ANSI 14.6 Standard
  • Turbine Blade Dynamic Evaluation of Fundamental Frequencies
  • Steam Generator Drop Evaluation - Determination of Potential Damage due to Lifting Equipment Failure

steam generator primary head - unit pressure load
Unit Pressure Load
steam generator primary head -temperature distribution
Temperature Distribution
steam generator primary head - thermal stresses
Thermal Stresses

small lifting lug with weld modeled
Small Lifting Lug with Weld Modeled
large lifting lug attached to the side of a heavy wall vessel
Large Lifting Lug Attached to the Side of a Heavy Wall Vessel

steam generator drop - exterior shell
Exterior Shell
steam generator drop - interior flow shroud
Interior Flow Shroud
steam generator drop - tube supports
Tube Supports

nuclear systems


Design ElementChallengesSimulation Benefits
Containment
  • Determining accurate seismic loads and responses
  • Providing accurate safety analyses to regulators
  • Estimating hydrogen release hazards
  • Avoid over-designing by performing accurate seismic analyses
  • Accident simulation when 1-D tools are insufficient
    • Impact of accidents on structural integrity
    • Fracture mechanics
    • Emergency core cooling system behavior
    • Showing jet-strike survivability
    • Hydrogen dispersion within containment
Coolant Pumps
  • Cavitation
  • Installation effects not taken into account by original design
  • Understanding performance in off-design (start-up and accident) conditions
  • Understand the impact of installation effects before deployment
  • Optimize performance by determining inlet and outlet flow angles and separation patterns
  • Reduce the number of hardware prototypes needed in the pump design and installation process
  • Allows parametric investigation of scale-up effects for these extremely large pumps, which is not possible through testing, but straightforward with simulation.
Reactor Pressure Vessels
  • Safety analysis for complex stratified flow
  • Code-checking for stress analysis in a timely fashion
  • Supply regulators with thermal hydraulic predictions for a wide range of LOCA scenarios
  • Stratification caused by thermal variations across cold legs
  • Use a pressure vessel design tool with built-in code checks
Fuel Assemblies
  • Designing for seismic safety without over-designing
  • Optimizing for thermal transfer in operating and LOCA conditions
  • Designing for flow-induced vibration
  • Limiting cladding fretting and wear
  • Reduce design time and physical prototypes through simulation
  • Spring design
  • Assembly seismic vibration analysis
  • Mixing vane design
  • Fluid-structure interaction simulation
Pressurizers
  • Designing steam generation and spray cooling system for optimal responsiveness to pressure changes
  • Design time for code checks
  • Cost savings through virtual prototyping of new designs and troubleshooting for existing units
    • Heat transfer and phase change due to heating
    • Natural circulation
    • Spray distribution
    • Local condensation rates
  • Rapid vessel design with built-in code checks
Steam Generators
  • Tube vibration
  • Accident analysis under natural convection conditions
  • Design for optimal heat transfer
  • Reduce expensive and time-consuming scaled test loop experiments
    • Investigate and optimize tube vibration sensitivity to flow conditions
    • Extend test results from experimental to full scale conditions
    • Confirm results from system level tools
    • Investigate installation effects
Passive Safety Systems
  • Inaccuracy of system-level tool safety analyses when natural circulation and mixing are fundamental to the process
  • Scale-up of parametric relationships from lab to full size
  • Gain physical insight about flow structures to guide safety system design
  • Generate new parametric relationships to embed in system-level tools
  • Extend behavior prediction from experimental to full scale conditions
Generation IV Reactors
  • Modeling high temperature gaseous flows (sometimes involving chemical reactions) with codes designed for water and steam
  • Modeling natural circulation and mixing in 1-D
  • Scale-up of parametric relationships from lab to full size
  • Model the full flow physics of gas-cooled reactors
  • Gain physical insight about flow structures to guide safety system design
  • Generate new parametric relationships to embed in system-level tools
  • Extend behavior prediction from experimental to full scale conditions
Waste Storage and Handling
  • Meeting regulatory requirements for repositories and transport and storage devices
    • Thermal management
    • Structural impacts
  • Cost efficient design and troubleshooting of storage devices and repositories to comply with regulatory requirements
    • Structural integrity during container impact
    • Cooling efficiency from forced or natural convection and conduction
    • Pool fire thermal predictions