678e89c5___CTBTO_Preparatory_Commission__Health_hazards
[Radionuclide] Krypton-85 (85Kr) [Half-life*] 10.76 years [Health hazards] 
Inhalation in excessive concentrations can result in dizziness, nausea, vomiting, loss of consciousness, and death.
General overview of the effects of nuclear testing: CTBTO Preparatory Commission
Health hazards