Earthquake damage
地震時

The earthquake initiated a rapid shutdown of the reactors, but the disaster cut power to controls and pumps, and the tsunami disabled backup generators. New diesel generators were delivered after batteries used to control the operation of the reactor were exhausted.
周五的地震切斷了各種控制系統(tǒng)和水泵的電力供應(yīng)，而海嘯又使備用發(fā)電機組無法工作。在控制反應(yīng)堆運作的電池報廢后，不得不啟用第二套柴油發(fā)電機。

Since the quake hit, fuel rods in the cores of reactor 1, 2 and 3 have overheated because of a lack of cooling water.
自地震以來，由于冷卻用水的缺少，1、2、3號反應(yīng)堆核心中的燃料棒一直處于過熱狀態(tài)。

Control rods were inserted into the cores to stop fission, but cores need several days to cool down.
控制棒已經(jīng)插入，但是核心需要好幾天時間來冷卻。