The present status of the JAERI/KEK joint project for high-intensity proton accelerators

The high-intensity proton accelerator facility in Japan comprising a 600-MeV linac, a 3-GeV rapid-cycling synchrotron, and a 50-GeV synchrotron, has been officially approved for the construction of its Phase I. The Phase I includes the 1-MW pulsed spallation neutron source, but the 50-GeV ring can be operated up to only 30 GeV. The linac energy is limited to 400 MeV, which is not high enough for the accelerator-driven nuclear waste transmutation system. The present status of the project is presented, including the result of the performance test of the already constructed components.