Engineering

Design, Simulate,
Build & Test.

Coupled multiphysics and AI-accelerated design, backed by in-house precision fabrication and national-lab-class testing. One loop, from model to metal.

Signature Platform

CRISP is High-Fidelity Reactor Simulation

Not a stack of disconnected tools. CRISP fuses experiments, data, and solvers into one platform that runs from material data all the way to accident, launch, and transport conditions in a single automated pass: every physics, every reactor type, fully coupled.

Step 01 · Material Data

Experiments, Data, and Tools, Connected

CRISP is grounded in material data, not just nuclear data. We generate and curate it from density-functional theory, accelerator measurements, and reactor experiments, then feed it straight into the solvers. The data, the experiments, and the tools are one connected pipeline, that is what makes the framework cohesive.

  • First-principles DFT for properties where data does not yet exist
  • Accelerator & reactor experiments that anchor the models in reality
  • Thermal-scattering libraries built from scratch for novel moderators
Step 02 · Geometry & Materials

One Model, Every Mesh

A single geometry definition feeds both the neutron-transport mesh and the finite-element structural mesh, with automatic hand-off so every physics sees the same as-built core, even particle fuels like TRISO and QUADRISO.

  • Shared geometry across neutronics and structural meshes
  • Unstructured-mesh transport on real geometry, not slab approximations
  • Fuels & moderators as first-class, fully-coupled materials
Step 03 · Coupled Solver

Every Physics, One Converged Answer

At the core sits the simulation driver, coupling the full physics catalog to a single self-consistent fixed point, then handing the loop to AI/ML surrogates and a multi-objective optimizer on HPC. Drag the model to explore the coupled physics.

  • Fixed-point multiphysics coupling across every physics at once
  • AI/ML surrogates & an optimizer drive automated design search
  • HPC-parallel: hundreds of millions of design iterations
Step 04 · Transient & Accident

From Steady-State to Off-Normal

The same coupled model runs reactor dynamics and transients, delayed-neutron kinetics, and off-normal scenarios, including startup, shutdown, and accident conditions, so safety cases come from the same physics as the design point.

  • Startup, shutdown & load-following with full thermal feedback
  • Accident & off-normal scenarios on the as-built model
  • Uncertainty quantification built into every result
Step 05 · Launch & Transport

Launch Loads and Safe Transport

For space and field systems, CRISP carries the model through launch-load, launch-safety, and transport conditions, including structural-deformation accident scenarios, then produces an archived, reproducible record of every input, solver, and result.

  • Launch-safety & launch-load analysis for flight reactors
  • Sub-critical transport & accident-scenario verification
  • Reproducible archive, available as SaaS: cloud or on-prem for classified work

Request a CRISP Briefing

100s of millions of design iterations explored in a single automated campaign, driven by AI/ML surrogates and a multi-objective optimizer on HPC.
One Coupled Framework

The Full Physics Catalog

Neutron TransportMonte Carlo & deterministic
Radiation ShieldingDose & attenuation
Criticality Safetyk-eff & safe margins
Depletion & BurnupBateman · CRAM
Fuel-Cycle AnalysisIsotopics & utilization
Decay HeatPost-shutdown power
Reactor DynamicsTransients & accidents
Reactor KineticsDelayed-neutron groups
Reactivity FeedbackTemperature coupling
Heat TransferConduction & gaps
Thermal-HydraulicsCFD & flow networks
Heat PipesAlkali-metal & capillary
Liquid-Metal CoolingNa · NaK · Pb
Gas & ThermosyphonHe · HeXe · CO₂
ThermomechanicsStress · creep · PCMI
Structural DynamicsSeismic & shock response
Swelling & Fuel Perf.Irradiation behavior
Mass DiffusionConstituent · Soret
Fission GasXe · Kr · He kinetics
Hydrogen MigrationHydride moderators
Materials & DFTAb-initio properties
Thermal-Scattering LawsFirst-principles S(α,β)
Corrosion & TransportStructural alloys
Molten-Salt ChemistryFLiBe · FLiNaK
TRISO / Particle FuelHybrid stochastic models
Multi-Fidelity CouplingHigh- & low-order blend
Uncertainty Quant.BEPU · polynomial chaos
Physics-Informed MLBayesian surrogates
Design OptimizationMulti-objective search
Digital TwinCommissioning to EOL
HPC OrchestrationParallel automation
Transport-Accident M&SStructural deformation

32 coupled capabilities and growing, all inside one framework, all driven by the same material data.

Every Physics, Coupled

Neutronics, Transport, Thermal-Hydraulics, Structures, Fuels & Materials in One Run.

Every Reactor

Micro, Space, Fast, Molten-Salt, Gas & Water Systems.

Material Data to Accident & Launch

Steady-State, Transients, Off-Normal, Launch & Transport Loads.

AI-Accelerated

Physics-Informed ML, Uncertainty Quantification & Automated Design Search.

Built In-House

Developed by the Team Behind the Nation's Reference Reactor Designs.

Available as SaaS

Per-Seat, Cloud, or On-Prem for Classified Work.

Test Engineering

Non-Nuclear Testing of Reactor Concepts

The capability that separates real reactor builders from paper designers, and that only a handful of national labs like SNL and INL have ever fielded. We take a "paper" reactor and build an electrically-heated test article that reproduces the real thermal-hydraulic conditions, validating the design before any fuel is involved. It is the same methodology our team used to take a space reactor to full power.

Thermal Simulators

Electrically-Heated Cores

Specialty thermal simulators that stand in for nuclear heat, reproducing core thermal-hydraulics for safe, fast, repeatable testing of cores, reflectors, shields, and support systems.

Liquid Metal & Heat Pipes

High-Temperature Flow Loops

Design and operation of pumped alkali-metal loops (lithium, NaK) and heat-pipe cores: the thermal backbone of space-reactor power systems.

Instrumentation & DAQ

Diagnostics & Data Acquisition

Defining data-acquisition requirements, instrumentation, and test procedures, with the evaluation methods to turn test data into design decisions.

Hardware · Fabrication & Test

Precision Manufacturing & Extreme-Environment Test

Hands-on fabrication across metals, ceramics, and high-temperature composites, through furnaces and vacuum systems built for reactor-grade environments.

High-temperature furnace
Furnaces

High-Temperature Test

Ceramic furnaces to 3000°F for thermal and mechanical material qualification.

Ultra-high-vacuum chamber
Vacuum

Ultra-High Vacuum & TVAC

Vacuum below 1e-5 Torr and thermal-vacuum qualification for space-bound hardware.

Precision machining and joining
Precision

Machining & Joining

Metal, ceramic & composite machining, brazing, welding, and robotic assembly.

Closed loop: design, simulate, fabricate, test, validate, repeating around a build-and-measure core
How We Close the Loop

Model. Simulate.
Test. Repeat.

CRISP drives physical testing, and measured data feeds straight back to refine the models. Running design, simulation, fabrication, and test as one workflow is what lets us iterate in days, validate against real hardware, and qualify components for extreme service.

  • Design : core, reflector, shield & support hardware
  • Simulate : coupled thermal-hydraulic & structural models in CRISP
  • Fabricate : metal, ceramic & composite parts in-house
  • Electrical & loop test : electrically-heated cores and liquid-metal / heat-pipe flow loops
  • Qualify : high-temperature, ultra-high vacuum & thermal-vacuum
  • Validate : measured data benchmarks the models

Put a Reactor Team Behind Your Program

Contract R&D, multiphysics modeling, criticality & safety analysis, independent V&V, and test-as-a-service.