primary pressure meaning in English

原生水压

The break was assumed to be a single tube double - ended and three - tube double - ended shear break . the diameter of the break orifice is 0 . 876mm and 1 . 518mm respectively . the characteristic responses of main thermal - hydraulic parameters , such as primary pressure , secondary pressure , break flow rate , pressurizer level , secondary side level of steam generator and so on , were presented in this thesis
试验再现了核电厂蒸汽发生器单根传热管双端断裂事故和三根传热管双端断裂事故发生后的热工水力现象，给出了事故过程中一次系统压力、二次系统压力、破口流量、蒸汽发生器二次侧水位、稳压器水位、元件表面温度等主要参数的瞬态响应。
The primary function of reactor protection system is to protect the integrity of the three nuclear safety barriers , namely , fuel cladding , primary pressure boundary and containment . when the certain safety limits , determined by the accident studies , are exceeded , the reactor protection system will give the protection signals of reactor trip and / or safeguard actuations , and then the reactor trip system and / or the engineered safety features are actuated
反应堆保护系统的功能主要是保护三道核安全屏障(燃料包壳、一回路压力边界和安全壳)的完整性，当运行参数达到危及三道屏障完整性的阈值时，保护系统动作触发反应堆紧急停堆和启动专设安全设施。