IN-FURNACE FASTENING DEVICE AND NUCLEAR REACTOR

To provide an in-furnace fastening device and a nuclear reactor capable of performing fastening of an in-furnace structure in a short time without using a bolt or the like under an exposure environment and further maintaining a fastening force for a longer period of time than a structure in which th...

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Bibliographische Detailangaben
Hauptverfasser:	WATANABE YOSHIO, KUROITA SHO, UCHIYAMA KOJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PHYSICS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	To provide an in-furnace fastening device and a nuclear reactor capable of performing fastening of an in-furnace structure in a short time without using a bolt or the like under an exposure environment and further maintaining a fastening force for a longer period of time than a structure in which the fastening force is obtained due to the difference in thermal expansion of a member.SOLUTION: In an in-furnace fastening device, each of two in-furnace structures installed inside a reactor pressure vessel includes flanges 7a, 11a, and while the device is operated, the flanges are fastened to each other using the pressure in the reactor pressure vessel.SELECTED DRAWING: Figure 2(b) 【課題】炉内構造物の締結を被曝環境下でボルト等を用いないで短時間で行うことができ、しかも、部材の熱膨張差による締付け力を得る構造よりも長時間締付け力を維持することができる炉内締結装置及び原子炉を提供する。【解決手段】炉内締結装置は、原子炉圧力容器の内部に設置されている２つの炉内構造物が各々にフランジ７ａ，１１ａを有し、装置運転時には前記フランジ同士が前記原子炉圧力容器内の圧力を用いて締結されることを特徴とする。【選択図】図２（ｂ）