u_tt = c² ∇²u · 2nd-order FD, Dirichlet walls, CFL cΔt/Δx ≤ 1/√2

t
0
dt (CFL)
0.601041
energy ~
0

Finite-difference / Monte Carlo / RK scheme at teaching resolution. Conserved quantities are diagnostics. FrameCalc is an educational workbench. It is not for medical, nuclear-safety, radiation-protection, or engineering sign-off. Fusion and IEC estimates are models, not device predictions. Accuracy · Legal

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