Control rod guide tube mounting pin

Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within...

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376353, G21C 1900

Patent

active

060261374

ABSTRACT:
A control rod guide tube mounting pin for engaging a hole in an upper core plate of a nuclear reactor pressure vessel has a resilient tubular portion with one or more axial crimps which flex allowing for resiliently fitting into a hole in an upper core plate without needing to enlarge or other machine the existing holes or drilling additional holes. Stainless steel mounting pins may be backfit into existing two pin mounting systems of control rod guide tubes adjacent to the outlet nozzles of the pressure vessels by removing the pins mounting the guide tubes adjacent the outlet nozzles to the upper core support plate; and then replacing the removed pins with stainless steel replacement pins.

REFERENCES:
patent: 4585613 (1986-04-01), Styskal et al.
patent: 4702880 (1987-10-01), Porowski et al.
patent: 4770846 (1988-09-01), Land et al.
patent: 4772448 (1988-09-01), Popalis et al.
patent: 4937039 (1990-06-01), Balog et al.
patent: 5035852 (1991-07-01), Land et al.

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