中小型高温高压核主泵试验台设计

Design of high-temperature and high-pressure RCP test bench

为了确保核主泵出厂前的安全性和功能性,验证核主泵各项性能,通过高温高压核主泵试验台的设计研究,介绍了试验台的组成、功能、安全设计等.开展了基于模型试验台结构的固有振动特性分析.研究发现,试验泵转动频率50 Hz附近的固有频率均位于离试验泵支撑较远的位置,对试验泵的运行不会产生影响;通过分析流致振动对试验台及核主泵的影响获得加固措施.试验台的设计考虑了回路升温时的热应力和位移,一方面保证核主泵在试验台上稳定运行,另一方面确保了回路系统冷、热交变和瞬态运行工况下试验台的安全.经测量,建造完成后的试验台回路在热应力的驱使下均朝预期方向发生了相应位移,位移量与理论计算基本一致.介绍了试验台脆性断裂失效、韧性断裂失效、接头泄漏失效、弹性或塑性失稳、均匀腐蚀失效等几种主要失效模式及相应预防措施.通过该试验台完成了小型反应堆核主泵相关的验证性试验.采用的设计技术和实施内容可以指导高温试验台的设计和建造,在工程和学术方面具有一定的参考价值.

To insure the safety and functionality of each reactor coolant pump(RCP)before it leaves the factory,and verify its performance,the high-temperature and high-pressure RCP test bench was designed and studied,the composition,function and the safety design of the test bench were introduced as well.The finite element model of the structure was established to analyze the natural vibration characteristics.It was found that the natural frequency around rotation frequency of 50 Hz was far away from the support of the test pump,which would not affect the operation of the test pump.Some reinforcement measures were obtained by analyzing the influence of flow-induced vibration on the test bench and the RCPs.Meanwhile,the design of the test bench also considered the thermal stress and displacement from the cold state to the hot state.These methods ensured that the RCP ran stably on the test bench,and ensured the safety of the test bench under the cold and heat alternating and transient operating conditions of the loop system.According to the measurement,after the completion of the construction,the circuit of the test bench driven by thermal stress,and the corresponding displacement occured in the expected direction.The displacement was basically consistent with the theoretical calculation.Several main failure modes and preventive measures such as brittle fracture failure,ductile fracture failure,joint leakage failure,elastic or plastic instability,and uniform corrosion failure of the test bench were introduced.The verification test for the RCP of the small reactor was completed by this test bench.The design technology and implementation content adopted can guide the design and construction technology of high-temperature test bench,which has greater engineering and academic reference significance.