⚛️ Nuclear Reactor — Neutron Kinetics & Control Rods Nuclear
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Presets
Control Rods
Insertion 0% = withdrawn (more reactivity), 100% = full in
60 %
Physics Options
Statistics
0
Reactivity ρ (pcm)
Doubling time (s)
100
Power level (%)
293
Core temp (°C)
Point Kinetics:
dN/dt = (ρ−β)/Λ · N + Σλᵢ·Cᵢ
dCᵢ/dt = βᵢ/Λ · N − λᵢ·Cᵢ

β = 0.0065 (U-235), Λ = 10⁻⁵ s
6 delayed-neutron groups

Doppler: ↑T → U-238 absorbs more → negative feedback → stable PWR.