The explosion did not cause much damage to the reactor itself.

爆炸没有对反应堆本身造成伤害。

youdao

The owner of the power station confirmed that the fire did not cause any damage to the reactor and there was no radioactivity involved.

核电站负责人强调火灾对反应堆没有造成任何影响并且也没有泄露放射线。

youdao

Damage to one reactor contributed to damage to another, and their proximity hindered a recovery.

对其中一个反应堆的损坏导致其他的也遭受了随坏，同时他们这种相互临近的布局使修复受到了阻碍。

youdao

The shield building is intended to protect the reactor from damage and provide a radiation barrier, in the event of an accident.

WSJ: NRC Approves Toshiba Reactor Design

In one of the examples cited in the report, the Nuclear Regulatory Commission (NRC) has twice raised the acceptable level of radiation damage reactor vessels can sustain, after several plants violated or came close to violating the original standard.

FORBES: The Biggest Threat to Nuclear Power: 'Pencil Engineering'

The water in the reactor is susceptible to damage from radiation, causing it to split into its components, hydrogen and oxygen.

FORBES: Explainer: What Caused The Incident At Fukushima-Daiichi