Radiation Hardening: 100kRad TID Tolerance (ESA ESCC 22900)

When satellites orbit through Van Allen radiation belts, they absorb cumulative ionizing doses exceeding 50kRad within months. How do we ensure mission-critical systems survive 100kRad TID tolerance thresholds mandated by ESA's ESCC 22900 standard? This question haunts every spacecraft designer as commercial space ventures grow 27% annually (Euroconsult 2023 Q2 report).