After the detonation of the Russian uranium bomb, uranium production was going smoothly and Riehl's oversight was no longer necessary; he then went, in 1950, to Sungul/Snezhinsk to head Laboratory B, where he stayed until 1952.
After the detonation of the Russian uranium bomb, uranium production was going smoothly and Riehl's oversight was no longer necessary at Plant No.12. Riehl then went, in 1950, to head an institute in Sungul, where he stayed until 1952.