SERAPH — Spatial Engine for Reactor Analysis and Physics in Higher dimensions

SERAPH is a Python reactor physics simulator, currently implementing neutron transport and kinetics models from first principles.

Active development — higher-dimensional geometry is planned.

Current Capabilities

Spatial diffusion

• 1D neutron diffusion-reaction via finite difference (explicit time-stepping)

Point kinetics

• Prompt kinetics: numerical and analytical
• One-group delayed neutron precursor model
• Multi-group delayed neutron precursor model
• Temperature feedback with Doppler reactivity and Newton cooling

Structure

src/seraph/ ├── diffusion_1d.py -- 1D spatial diffusion solver ├── point_kinetics.py -- point kinetics models └── main.py -- example runs

Running

pip install matplotlib
python -m seraph.main

Status

Core kinetics models are working. Spatial solver is 1D only for now. Higher-dimensional geometry and more advanced transport methods are in progress.