| 摘要 |
PURPOSE: A centering device of a stud tensioner of a nuclear reactor is provided to prevent damage to a driving gear by accurately centering a housing of a tensioner to a circumference of a stud. CONSTITUTION: A stud(10) is coupled in a coupling hole of a pressure vessel of a nuclear reactor. A tensioner(100) includes a tensile device(110), a measuring device(120), and a separating and coupling device(130). The tensile device has an oil pressure device and a piston(113). The oil pressure device has an oil pressure supplying and returning line for operating an oil pressure cylinder. The piston is connected to the oil pressure device. The piston tensions a flow bar. The measuring device measures a tensile length of the flow bar. |
