Nyonoksa/Nenoksa radiation accident (8 August 2019)

An explosion and radiation release at a Russian naval test site near Nyonoksa (Arkhangelsk Oblast) on 8 August 2019, widely though not conclusively linked to a failed Burevestnik nuclear-powered cruise missile test. Rosgidromet reported short-lived fission products (⁹¹Sr, ¹³⁹Ba, ¹⁴⁰Ba, ¹⁴⁰La) in the following weeks; CTBTO monitoring stations along the plume's modeled path went silent days later. The event is the vault's one real-world data point for Burevestnik radiological forensics, and it recurs across the Burevestnik-verification cluster — worth a dedicated page precisely because the accident's own details (ground vs. flight event, fission vs. activation products, which stations went dark and when) are load-bearing distinctions the cluster keeps having to re-derive.

References

• claim-burevestnik-reactor-emits-radionuclides-in-exhaust · claim-hecla-kemp-burevestnik-signature-differs-from-nyonoksa-fission-products · claim-spykman-2021-null-result-burevestnik-radionuclide-search · claim-ctbto-ims-stations-nyonoksa-plume-path-went-dark-not-technical · claim-burevestnik-hecla-kemp-isotope-signature-unconfirmed-by-detection-data
• Related hubs: entity-ctbto-international-monitoring-system