Compliance packages for nuclear and thermal hydraulics modeling
A collaboration with Archon Engineering, this comprehensive Nuclear Verification and Validation package enables engineers to confidently deploy Fathom, Arrow, and Impulse in safety-related environments. This package delivers the formal verification and validation documentation needed to meet nuclear regulatory and quality-assurance requirements.
Ensure Accuracy and Reliability
Provides the verification and validation documentation needed to satisfy nuclear-industry standards and CGD requirements.
Delivers proven, documented accuracy for flow, pressure, and heat-transfer calculations.
Reduces the internal validation burden by providing pre-developed, nuclear-qualified verification and validation work.
Structured for purchase through safety-related procurement pathways.
Nuclear-Grade Verification & Validation for Fathom, Arrow, and Impulse, GSC Modules, and XTS Modules
Quality Assurance and Regulatory Alignment
Developed under a quality-assurance program compliant with 10 CFR 50 Appendix B and ASME NQA-1, this Nuclear Verification and Validation package ensures the accuracy and reliability required for safety-related flow and thermal-hydraulic modelling. It is structured to support nuclear-industry procurement and regulatory expectations for commercial software, enabling the use of Fathom, Arrow, and Impulse in regulated, safety-related applications with confidence.
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Why a Nuclear Verification & Validation Package necessary
When using commercial engineering software in nuclear-safety or safety-related applications, regulatory frameworks such as 10 CFR 50 Appendix B and quality standards like ASME NQA-1 require rigorous verification and validation activities, and often a Commercial Grade Dedication (CGD) process. This package helps meet those requirements by demonstrating that the software performs accurately and reliably within defined modelling domains and by documenting any limitations that must be considered.
Included in the Nuclear Verification & Validation Package
The Nuclear Verification and Validation package provides a formal, structured report that includes:
- Verification of flow and pressure calculations across a full range of pipe and junction modelling scenarios in Fathom or Arrow.
- Validation of steam and water properties—such as density, viscosity, vapor pressure—and heat-transfer results, including temperatures, heat flux and heat rate, using user-supplied thermophysical data.
- Verification of pipe sizing parameters, pipe roughness, and fitting loss data.
- Optional evaluation of Goal-Seeking and Extended Time Simulation modules when applicable.
- Documentation of any known software limitations or special conditions identified during testing.
Applications and Use Cases
The Nuclear Verification and Validation package supports the use of Fathom, Arrow, and Impulse in analysing piping systems and thermal-hydraulic behaviour within nuclear facilities and other highly regulated environments. It is ideal for teams conducting a Commercial Grade Dedication process or any organization that requires formal, documented assurance of software performance.
Nuclear Verification and Validation Reporting
The Fathom, Arrow, or Impulse database files for:
- Flow and pressure calculations, using pipe and junction features (Each junction type will be checked against manual calculations for the different user options provided by either Fathom or Arrow.)
- Steam and water properties (density, viscosity, vapor pressure)
- Pipe sizes (diameters, thickness)
- Pipe roughness
- Fitting loss data
- Heat transfer (fluid and pipe wall temperatures, heat rate, heat flux, etc.) calculations from user supplied thermo-physical data (i.e. thermal conductivity of pipe and insulation data, etc.)
- GSC module results for the goal and variable options provided by either Fathom or Arrow (optional for GSC modules only)
- XTS module results for the time triggering scenarios provided by Fathom (optional for XTS module only)
- Any limitations of the software identified as a result of the V&V
Calculate pressure drop and pipe flow distribution in liquid and low-velocity gas piping and ducting systems.
