The RSGs, manufactured at MHI's Kobe Shipyard and Machinery Works, measure 20 meters in height and weigh roughly 270 tons. According to the company’s press release, SGs play a crucial role in PWRs by transferring the thermal energy generated in the reactor vessel to a secondary coolant and feeding the resulting steam to a turbine system to generate electricity. Their pressure-resistant container made of low-alloy steel, houses approximately 4,800 heat transfer tubes made of a thermally treated nickel-chromium-iron alloy.