120, )Р China Nuclear Power Technology Research Institute Shenzhen of Guangdong Prov ChinaРAbstract: , -Р Start and stop power regulation of nuclear reactors depends on the control rod drive mechanism drivР . -Рing control rod up and down movements Accurate and reliable measurement of control rod position is an imporР . ,Рtant guarantee for the safe operation of the reactor In this paper in the process of designing and constructingР , , ,Рthe rod position detector prototype of nuclear power station the measuring principle coding coil number ofР , , ,Рchoices coil frame are described the system is tested and the test results show that the prototype design isР .Рreasonable and it has reliable performanceРKey words: ; ; ;Р nuclear power station rod position detector grey code coil frameР 1556
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