Now in a PWR we have essentially boron to control reactivity.
在一个压水式反应堆里，我们用硼来控制反应率。
The cruciform control rod controlling is the main method to control reactivity in the nuclear heating reactor (NHR).
核供热反应堆的过剩反应性主要靠十字形控制棒来控制。
You can also control excess reactivity by leakage.
你也能通过泄露控制剩余反应性。
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