| 摘要 |
The present invention is configured as follows: sheathed thermocouples (4, 7) detect the temperature at target locations inside a containment vessel (1); the sheathed thermocouples comprise a metal sheath which has different types of thermocouple elements embedded therein and is filled with an inorganic insulation material; the sheathed thermocouples are connected to first metal sheath inorganic insulation cables (5, 8) which are protected by a sheath having an outside diameter smaller than that of the sheathed thermocouples, having thermocouple elements of the same configuration as the sheathed thermocouples embedded therein, and being filled with an inorganic insulation material; the first metal sheath inorganic insulation cable (5) is connected to a ceramic terminal mount inside of a waterproof terminal box (6) inside the containment vessel; second metal sheath inorganic insulation cables having the same configuration as the first metal sheath inorganic insulation cables and disposed at an electrical penetration module (9) of the containment vessel are connected to the first metal sheath inorganic insulation cables using the ceramic terminal mount; and the second metal sheath inorganic insulation cables are connected to a terminal mount inside of a terminal box (10) that is outside of the containment vessel. This configuration provides an instrumentation system for detecting state quantities at target locations inside of the containment vessel of a nuclear power plant, wherein the instrumentation system is strong and is not impacted even if a severe accident occurs. |
