3KEYMASTER™ — Reactor Modeling

Integrating world-class engineering codes for reactor simulation

3KEYMASTER™ is as flexible as it is powerful — assimilating and running any high-end engineering code within its feature-rich visualization environment. From thermal-hydraulics and neutronics to severe accident analysis, all codes integrate seamlessly into a single platform.

Primary Thermal Hydraulics

Thermal-Hydraulic Code Integration

3KEYRELAP5 is an interface-programming layer developed by WSC to enable communication between INL's RELAP5-3D and 3KEYMASTER™ real-time simulation software. It employs the power of 3KEYMASTER™ visualization through engineering tools without interfering with RELAP5's computational aspects — providing seamless integration with FlowBase, Logic and Control, and Electrical tools.

Visual input deck editor — create or modify RELAP5 input decks using a visual editor within the 3KEYMASTER™ GES.

Visual Toolbar — visual representations of RELAP5 components for drag-and-drop model building.

Visual Builder — generates existing input deck components in 3KEYMASTER™ memory with visualization through the Visual Toolbar.

Input Deck Convertor — regenerates input decks from binary to text form and visually compares differences between two binary input decks.

Visual interface — graphical representation of the interfaces between RELAP5 and other tools within 3KEYMASTER™.

Real-time execution FlowBase integration Logic & Control integration Electrical tool integration Visual nodalization comparison

3KEYMARS enables data and control communications between KAERI's MARS code and 3KEYMASTER™ — filling a similar role to 3KEYRELAP5. MARS is a state-of-the-art realistic thermal-hydraulic systems analysis code with multi-dimensional capability, achieved by tightly integrating the one-dimensional RELAP5/MOD3 with the multi-dimensional COBRA-TF codes. The result is an engineering-grade simulation code fully integrated with 3KEYMASTER™.

Multi-dimensional analysis 1D RELAP5/MOD3 integration COBRA-TF integration Engineering-grade fidelity Full 3KEYMASTER™ integration

3KEYMASTER™ RELAP5/NESTLE Product Sheet →

Core Neutronics

NESTLE — Neutron Flux & Power Modeling

NESTLE is a true two-energy group neutronics code that computes neutron flux and power for each node at every time step — performing nodal diffusion calculations while assuming constant thermal-hydraulic conditions over the duration of each step. The diffusion equations are solved in full two-group form using the nodal expansion method with a nonlinear iterative solution scheme.

Two-energy group neutronics Node-level flux & power Nodal expansion method Nonlinear iterative scheme Partial or full-length control rods Individual or grouped rod modeling

Severe Accident Modeling

MELCOR — Beyond-Design-Basis Analysis

Since the Fukushima Dai-ichi accident, interest in severe accident training and engineering analysis has increased significantly. NRC Task Force recommendations have reinforced the need to strengthen and integrate nuclear plant emergency response capabilities. WSC has responded by embedding the MELCOR severe accident analysis code — developed by Sandia National Laboratory — directly into 3KEYMASTER™.

Sandia National Laboratories — MELCOR

Full-scope severe accident progression modeling for light-water reactors

MELCOR models the progression of severe accidents in light-water reactors in a fully integrated, engineering-level computer code. A wide range of severe accident phenomena in both boiling and pressurized water reactors is processed through MELCOR in a unified framework — embedded seamlessly within the 3KEYMASTER™ real-time simulation environment.

BWR severe accident modeling PWR severe accident modeling Accident progression simulation Emergency response training Real-time execution 3KEYMASTER™ integrated Fukushima response capability NRC recommendations alignment

3KEYMASTER™ 3KEYSAA Severe Accident Product Sheet →

Further Information

Explore WSC's complete reactor modeling capabilities

For complete details on thermal-hydraulic, neutronic, and severe accident modeling — including RELAP5/NESTLE integration and MELCOR severe accident analysis — refer to the product sheets below.

RELAP5/NESTLE Product Sheet → 3KEYSAA Severe Accident Sheet →