Anil Ambani group's Reliance Power is looking to invest about $1 billion (Rs 4,000 crore) towards purchase of large-size vessels for shipping coal from abroad to its Krishnapatnam and other projects. Reliance Power, which has bagged the country's two ultra mega power projects of 4,000 MW each at Sasan in Madhya Pradesh and Krishnapatnam in Andhra Pradesh, has already received initial quotations from some major shipping yards in China, Korea and Japan towards its order for Capesize vessels worth about $1 billion. These are among world's biggest shipping vessels with capacity of up to 200,000 tonnes. PTI