Tritium self-sufficiency de-risked; export scale

Frozen result

What was computed

surplus_134=1.6912889114919258; surplus_180=3.979503321157472; T_kg_yr=3.836229108166553

Reproduce this

# Reproduce BR-OUT-1 against the frozen record
pip install kronos-toolkit   # github.com/KronosFE/kronos-toolkit
python -c "from kronos_toolkit.verify import run_regression; run_regression()"
# BR-OUT-1 is anchored in the 2026-08-27 freeze spine (verdict: reproduced).