| 摘要 |
PURPOSE: An assembly of electrical penetration units with a pressure maintaining monitoring function is provided to improve the stability by connecting all holes to which wire assembly modules are coupled with a gas leakage detecting hole and constantly maintaining inner and outer pressure of a nuclear reactor. CONSTITUTION: An electrical penetration unit assembly(50) is installed on a flange(3) that is provided on a concrete wall(1) by a hexagon headed bolt(33) and a spring washer(34). The electrical penetration unit assembly(50) is provided with a front plate(2) at its left end and two stiffening plates(6a,6b) at its right end. A wire penetration module(60) is fixed on the front plate(2) by a front ferrule, a middle ferrule, and a rear ferrule, to thereby provide three sealed sections. The wire penetration module(60) passes through a hole on the stiffening plates(6a,6b) fixed on by space maintaining pipes(7,8) and an extension bolt(9).
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