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PROCESS AND DEVICE FOR ADAPTING NEW UPPER INTERNAL EQUIPMENT TO THE VESSEL OF A PRESSURIZED WATER NUCLEAR REACTOR
PROCESS AND DEVICE FOR ADAPTING NEW UPPER INTERNAL EQUIPMENT TO THE VESSEL OF A PRESSURIZED WATER NUCLEAR REACTOR
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机译:在加压水核反应堆的容器中采用新的上部内部设备的过程和装置
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摘要
With the reactor vessel (1) open and filled with water, and the core assemblies removed, means for measuring alignment (50) and means for measuring clearances (56, 58, 59) are mounted on the upper internal equipment (13). The upper equipment (13) is introduced into the vessel and is deposited on the lower equipment (3). Measurements of alignment are carried out and, if appropriate, the alignment is corrected by moving the upper internal equipment on the lower equipment (8). The clearances of the upper core plate are measured and, if appropriate, the upper internal equipment (13) is moved as a function of these measurements. The clearances around the centering and alignment pins are measured and adapters are machined and then fixed to the upper internal equipment (13) to reduce the clearances around the pins to a low, predetermined value. The invention also relates to the device for measuring and adapting the position of the internal equipment.
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