There is no particular evidence that atomic radiation causes birth defects in later-conceived children. This from Wikipedia:
No statistically demonstrable increase of congenital malformations was found among the later conceived children born to survivors of the Nuclear weapons at Hiroshima and Nagasaki.[11][12][13] The surviving women of Hiroshima and Nagasaki, that could conceive, who were exposed to substantial amounts of radiation, went on and had children with no higher incidence of abnormalities than the Japanese average.[14][15]
The deformities caused by Thalidomide were thinly spread across the population so it took the medical profession a while to realise that there was a pattern emerging.
Getting back to the TV it is a great series with wonderful actors (the exception being the wooden clown Fred).
Still see to have a drama which is all about women, with women at centre stage and men only being peripheral characters.