The main risk is the market paying today for a future commercial nuclear ramp that arrives slower than 2026–2031. If
microreactor/advanced-fuels adoption is delayed, BWXT may still grow on defense and
special materials, but the stock can de-rate from a scarcity premium to a more standard defense-components
multiple. Secondary risks are QA events (trust damage), customer concentration, and capital allocation (
capex + M&A + leverage) during multi-year program ramps.