Observed arrival · 2026-09-29
Fission Control: a reactor shift in your browser
A free browser simulator puts players through starting, synchronizing, and operating a pressurized-water reactor.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People curious about reactor operations and grid dispatch
- Worth noticing
- The guided startup has 12 steps; the page also lists 11 malfunctions, including a stuck-open PORV and tube rupture.
Field notes
The outlined startup runs from condenser vacuum and reactor coolant pumps through criticality, turbine roll, breaker closure, and load pickup. The page also describes a recovery sequence involving steam dumps, borating, controlled cooldown, depressurization, and residual heat removal. The developer calls the project an early version and specifically solicits reports of bugs or behavior that does not match a real plant.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue