The future development of South Texas Project (STP) units 3 and 4 looks unlikely after majority shareholder NRG Energy announced that it will write down its investments so far in the project and make no further investment. The project to construct two Advanced Boiling Water Reactors (ABWRs) at STP is being developed by Nuclear Innovation North America (Nina) - jointly owned by NRG Energy and Toshiba. It had been considered among the leading new build projects in America, and was one of the few that had survived both the financial crisis and the new availability of cheap natural gas. NRG...