13.49. The advanced boiling-water reactor (ABWR) is a large, 1300- MW(el) system developed by an international team of BWR manufacturers benefiting from the extensive safety and performance experience of the many operating systems throughout the world. Two units are under con­struction in Japan, with commercial operation scheduled for the late 1990s. Some technical data are summarized in Table 13.4. The core power density has been reduced by about 10 percent compared with present BWR values given in Table 13.3. Various fuel assembly design options are available, but for orientation purposes, the fuel dimensions for the 8×8 lattice given in Table 13.3 are adequate.