Hitachi-GE Nuclear Energy, Ltd. has developed and improved construction technology for advanced boiling water reactors based on extensive experience in boiling water reactor construction. Shimane Nuclear Power Station Unit No. 3, which is being supplied to The Chugoku Electric Power Co., Inc., is now under construction using HGNE's latest construction technology. In particular, HGNE applies a "room module" for HCUs. This room module is composed of building structures such as walls, the ceiling, floor, and almost all mechanical components inside the room such as piping, platform, and cable trays. Once the room module is installed at a site, the work is almost completed. Therefore, the amount of work at a site can be significantly reduced, which helps to distribute the work evenly. HGNE collaborates with Kajima Corporation to design and ssemble the HCU room modules.