氮气覆盖系统；
非能动的系统由大容积的水箱(安注箱)组成，箱内装有硼水，上部由带压的氮气覆盖。
The passive systems consist of large volume tanks (accumulators) which are filled with borated water and pressurized with nitrogen gas.
非能动的系统由大容积的水箱(安注箱)组成，箱内装有硼水，上部由带压的氮气覆盖。
The passive systems consist of large volume tanks (accumulators) which are filled with borated water and pressurized with nitrogen gas.
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