Alter NRG-owned Westinghouse Plasma Corp (WPC) plasma torch systems are proven in metallurgical and waste-to-energy (WTE) commercial applications. In Japan, the WPC Plasma gasification system has been used to process municipal solid waste (MSW) for more than five years. Plasma torches have also been used in cast iron foundry melting at a General Motors plant in Defiance, Ohio since 1989.