Reactor Core Modeling

RXBuilder™

Accurate core data is the foundation of reliable and stable simulation.
RXBuilder is a specialized solution designed for high-precision reactor core modeling and real-time data validation.

RXBuilder is a highly reliable reactor core analysis tool designed for both operational environments and R&D applications, enabling engineers to simulate cycle-based fuel configuration data and operating conditions with greater speed and accuracy.

By leveraging proprietary NEM (Nodal Expansion Method)–based modeling and integrated multi-fuel code capabilities, RXBuilder supports real-time simulation of complex calculations and enables accurate prediction of system behavior and performance under actual operating conditions.

Key Messages

Intuitive GUI with 2D/3D Visualization

A user-friendly, graphics-based interface (GUI) enables easy access even for non-expert users. Key reactor core conditions—such as neutron density, power distribution, and temperature profiles—are visualized in real time through 2D/3D maps. Monitoring-based analytical capabilities support rapid detection and response to anomalies or deviations.

Unmatched High-Precision Reactor Core Analysis Capabilities

High-precision NEM-based analysis algorithms integrate multiple physical domains, including thermal-hydraulics, neutron physics, electrical systems, and control logic. Advanced numerical methods such as Comet Plus™ and the Improved Quasistatic technique are built in. Stable and reliable results are maintained even under severe transient conditions, with high spatial resolution and strong numerical convergence.

Multi-Fuel Code Integration and Automated Initial Condition (IC) Generation

Data integration is supported with leading fuel codes such as CASMO-3/4/5, PANTHER, and ANC. Fuel cycle data can be automatically updated, enabling efficient model reuse. An automated Initial Condition (IC) generation feature eliminates the need for manual IC configuration by users. → Allows immediate transition to a new model when fuel cycles change.

Key Application Areas

Reactor Core Module Design and Operational Validation for Nuclear Power Plant Simulators
Performance Prediction and Evaluation for New Reactor Designs or Fuel Replacement
Application to Safety Analysis Scenarios Requiring High-Reliability Analysis
Development of a Real-Time Analysis–Based Training System Integrated with Simulators

Item Effect

Accuracy: Minimize uncertainty in the design and validation phases through high-precision reactor core analysis.
Time Efficiency: Significantly reduce repetitive task time through automated IC generation and fuel cycle updates.
Reliability: Enhance confidence in analysis results through validated numerical methods and advanced visualization.
Operational Flexibility: Ensure compatibility with a wide range of fuel codes and simulator platforms.