Here you will find the details into the custom thermodynamic models that power the Kallskär SFR-1000 simulation, how we simulate liquid metal coolant, fast neutron flux, and natural convection in real time.
Unlike standard Roblox games that rely on simple scripted loops, our custom physics engine models the entire primary coolant system — 1,250 tonnes of simulated liquid sodium — inside a single, unpressurized stainless steel pool.
You have to actively manage three massive primary pumps and six Intermediate Heat Exchangers (IHXs) held directly into this pool. This localized design eliminates the risk of primary coolant loop leaks, rewarding you if you know exactly how thermal inertia works.
The sheer volume of simulated sodium provides a massive heat sink. The core takes hours of in game time to heat the pool even a few degrees during a total power loss.
Because sodium boils at 881°C, the reactor operates at normal atmospheric pressure. This reactor type completely removes the risk of explosive depressurization, so your focus can stay on thermal management.
In standard reactors, water slows down (moderates) neutrons. Our engine calculates unmoderated "fast" neutron speeds, enabling the simulation of complex isotopic fission that other games simply script.
The core is loaded with Mixed Oxide (MOX) fuel, consisting of 81,571 individually tracked annular fuel pins. You must manage the 160 day effective full power cycle, balancing control rod insertion with real time burnup calculations to extract maximum energy without poisoning the core.
Inspired by the BN-600, our secondary loops transfer heat to water via three massive Steam Generators. Each generator is divided into 8 distinct, interactable sections. If a leak occurs, you must use micro sensors to locate the fault. A single section can be isolated, drained, and purged with nitrogen via the control room panels in under 60 seconds, all while struggling to maintain the reactor at 95% power.