Mitsubishi Heavy Industries has completed a contract in Brazil which marks its first large-scale component replacement with installation at an overseas nuclear power plant.

The company carried out the work at Angra 1, a 657 MW pressurised water reactor plant owned by Eletrobrás Termonuclear (Eletronuclear).

MHI replaced the plant’s existing components with a new reactor vessel head and control rod drive mechanisms.

Angra 1 is about 130 kilometres west of Rio de Janeiro and began commercial operation in 1985.

Eletronuclear is a subsidiary of Centrais Eletricas Brasileiras, Brazil’s main electricity corporation, in which the government and Banco Central do Brasil, the country’s central bank, have a 60 per cent-plus stake.

Eletronuclear also owns and operates Angra 2 and is building Angra 3.