From the NRC

Download Link is to the NRC page Design Documents:

The Economic Simplified Boiling Water Reactor (ESBWR) is a 4500 MWt reactor that uses natural circulation for normal operation and has passive safety features. GE-Hitachi Nuclear Energy (GEH) submitted an application for final design approval and standard design certification for the ESBWR on August 24, 2005. By letter dated December 1, 2005, the application was accepted for docketing. Docket number 52-010 has been assigned to the ESBWR.