1986 Angra 1 leakage

The location
Angra Nuclear Power Plant is Brazil's only nuclear power plant and the first reactor (Angra 1) was built in 1971. It is located at the Central Nuclear Almirante Álvaro Alberto (CNAAA) on the Itaorna Beach in Angra dos Reis, Rio de Janeiro, Brazil. It consists of two Pressurized water reactors, Angra I, with a net output of 609 MWe, first connected to the power grid in 1985 and Angra II, with a net output of 1,275 MWe, connected in 2000. Work on a third reactor, Angra III, with a projected output of 1,350 MWe, began in 1984 but was halted in 1986. Work started again on 1 June 2010 for entry into service in 2015 and later delayed to 2018.

The 1986 incident
Roughly 20,000 to 25,000 liters of radioactive water accidentally leaked from the Angra 1 nuclear power plant into the wider environment.

It soon became a major local issue and was front-page story on the popular Brazilian daily Folha de S. Paulo on 9 October.

It dose not officially have a INES rateing, but probably was a Level 4 INES Scale event.

Also see

 * 1) Geiger-Muller counter
 * 2) UK OTL atomic reactors in 1962
 * 3) Atomic accidents and disasters
 * 4) Leningrad Nuclear Power Plant accidents
 * 5) Corporate malfeasance at the Peach Bottom Nuclear Generating Station
 * 6) Synoptic charts of major atomic reactor and waste disasters up to 2017

Links

 * 1) https://en.wikipedia.org/wiki/List_of_civilian_nuclear_accidents
 * 2) https://www.wikiwand.com/en/List_of_civilian_radiation_accidents