IndustriesNew vertical

Nuclear Engineering

Custom software for nuclear analysis workflows: Monte Carlo transport, diffusion solvers, thermohydraulic simulation, built by physicists and nuclear engineers who run the codes themselves.

What's included

  • Monte Carlo & deterministic transport

    Tooling around MCNP, OpenMC, and deterministic codes for shielding, criticality, and flux calculations. From input deck generation to automated post-processing pipelines.

  • Code integration

    Interfaces and automation layers for multi-group solvers. Batch run management, parametric sweeps, and structured output parsing for downstream analysis.

  • Thermohydraulic simulation tooling

    Pre/post-processing tools for thermohydraulic codes. Automated input generation, result extraction, and visualisation dashboards for transient and steady-state analyses.

  • Engineering data pipelines

    Structured pipelines that connect simulation outputs to design databases, regulatory documentation, and review workflows, replacing manual copy-paste with auditable, reproducible flows.

  • Visualisation & reporting

    Interactive dashboards and automated reports over simulation results. Physics-aware visualisation built for engineers who need to interpret, not just display, the output.

The engagement process

01

Physics review

We sit with your engineers to understand the analysis workflow end to end: codes used, input/output formats, pain points in the current process. Output: a clear problem definition and scope.

02

Architecture design

System design covering code interfaces, data formats, pipeline stages, and UI/reporting layers. Every architectural decision is documented and reviewed before any code is written.

03

Phased delivery

Delivered in working increments, a usable pipeline stage or tool at each step. No big releases that arrive six months later. Engineers test against real cases throughout.

04

Handoff & documentation

Complete technical documentation, operator guides, and a defined support window. The team that built it is available to answer questions after delivery.

Why Rather Labs

Why we're the right fit

See case studies

Team that runs the codes

Our team includes physicists and nuclear engineers who have written and executed Monte Carlo, diffusion, and thermohydraulic codes in real environments. We build interfaces around tools we have actually used.

Argentina's nuclear tradition

We operate in a country with a 70-year nuclear engineering history: INVAP, CNEA, the RA-6 research reactor. That context shapes how we think about nuclear software: precision, auditability, and long operational lifetimes.

Engineering-first development

We do not hand physics requirements to a generic software team. The engineers who define the problem are in the same room as the engineers who write the code. No translation layer, no requirements lost in handoff.

Our stacks & tools

PythonFortranC++MCNPOpenMCSERPENTRELAPENDF/BHDF5ParaViewVisItFastAPIReactTypeScriptPostgreSQLDockerAWSand more

Questions we hear often

Specific questions? Book a 30-minute discovery call. No commitment, just honest answers.

Get in touch

Primarily MCNP and OpenMC for Monte Carlo transport, and standard multi-group diffusion codes. For thermohydraulics, we have worked with RELAP-based workflows. If you use a code not listed, tell us; we evaluate each case on the physics and file formats involved.

Yes, within applicable regulations. We build the tooling around your licensed installation; we do not redistribute or modify the core codes. Compliance with export control requirements is the client's responsibility; we structure engagements accordingly.

Both. Our background is closer to research reactor environments, but the software challenges (input automation, output parsing, data management) are the same across facility types. We scope based on the workflow, not the reactor type.

We design systems with auditability built in from the start: reproducible runs, versioned inputs, structured outputs, and export formats compatible with regulatory submission workflows. We do not provide regulatory advice, but we engineer systems that support it.

Free 30-minute call

Ready to scope your project?

Tell us what you're building. We'll ask the right questions, validate the approach, and tell you honestly what it would take.