Plans to integrate the second reactor of the Temelin nuclear power plant into the national grid have been postponed indefinitely. A spokesman said that the delay was caused by a short circuit in the generator and it would take several days to establish the precise cause. Initially the reactor was to have been put on line immediately after this week's tests. The plant's first reactor continues to work at a hundred percent capacity. Temelin combines Soviet and American technologies, and critics have claimed that it is unsafe.