678e89c5___CTBTO_Preparatory_Commission__Health_hazards
[Radionuclide] Strontium-90 (90Sr) [Half-life*] 28 years [Health hazards] 
A small amount of strontium 90 is deposited in bones and bone marrow, blood and soft tissues when ingested. Can cause bone cancer, cancer of nearby tissues, and leukaemia.
General overview of the effects of nuclear testing: CTBTO Preparatory Commission
Health hazards