2 sentences

1. 这座核反应堆已投入运行。

   zhè zuò hé fǎn​yìng​duī yǐ tóu​rù yùn​xíng.

   This nuclear reactor has already been put into operation.

   Source: Dong Chinese Dictionary

2. 科学家正在研究如何安全地处理核反应堆中产生的钚。

   kē​xué​jiā zhèng​zài yán​jiū rú​hé ān​quán de chǔ​lǐ hé fǎn​yìng​duī zhōng chǎn​shēng de bù.

   Scientists are researching how to safely dispose of the plutonium produced in nuclear reactors.

   Source: Dong Chinese Dictionary