Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor...
Patent
1986-07-29
1987-09-29
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
376258, 376260, 376310, 33502, G21C 1700, G21C 1900
Patent
active
046967869
ABSTRACT:
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.
REFERENCES:
patent: 4197652 (1980-04-01), Qurnell et al.
Cadaureille Gerard
Frizot Alain
Lalere Jean-Christophe
Machuron Jean-Yves
Framatome
Kyle Deborah L.
Wasil Daniel
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