For reference, I'm going to roughly calculate tritium in an Apollo launch. T in 201,721 lbs of hydrogen fuel: based on a natural abundance of 10⁻¹⁸ 2.736 × 10⁻⁷ μg or 2634 pCi Based on a rough estimate of T abundance in 1969 (~40x): 1.094 × 10⁻⁵ μg or 105,326 pCi
