Real reactor physics. Guided training campaigns, from first criticality to Three Mile Island. Nothing to install — it all runs locally in your browser.
▶ Enter the Control Room
Westinghouse-style four-loop plant. The full experience: cold shutdown to 100% power, operator manuals, a mission campaign, and the TMI‑2 story module.
Operate →GE-style direct-cycle plant, Fukushima-era design. The physics engine is complete — its control room is under construction.
COMING SOONChernobyl-era Soviet design, in pre- and post-accident configurations. The physics engine is complete — its control room is under construction.
COMING SOONThe core runs on point-kinetics with six delayed-neutron groups, and it pushes back: Doppler and moderator-temperature feedback, boron worth, and xenon poisoning all move the reactivity in real time. Watch net reactivity and reactor period as you approach criticality, and feel the coefficients fight — or amplify — every move you make.
Decay heat, two-phase steam generators, pressurizer level and pressure control, and a full balance of plant from the core through the turbine to the grid — coupled thermal-hydraulics where every valve, pump, and rod has a real, physical consequence.
An instructor watches the board and gates your progress through real procedures — startup, power maneuvers, casualty response — with commercial-format operator manuals to study.
Inject stuck valves, failed sensors, and pump trips, then diagnose the casualty from a board that isn’t telling you the whole truth.
Reactor Dynamics is an educational simulator built to teach how nuclear plants actually behave — including the conditions behind Three Mile Island, Chernobyl, and Fukushima. Read more →