Nuclear fuel element nut retainer cup

Details Nuclear fuel element nut retainer cup Nuclear fuel element nut retainer cup

1975-08-01

1977-07-19

Engle, Samuel W.

Brushing, scrubbing, and general cleaning

151 69, 176 78, G21C 330, F16B 4300

Patent

active

040366928

ABSTRACT:
A typical embodiment has an end fitting for a nuclear reactor fuel element that is joined to the control rod guide tubes by means of a nut plate assembly. The nut plate assembly has an array of nuts, each engaging the respective threaded end of the control rod guide tubes. The nuts, moreover, are retained on the plate during handling and before fuel element assembly by means of hollow cylindrical locking cups that are brazed to the plate and loosely circumscribe the individual enclosed nuts. After the nuts are threaded onto the respective guide tube ends, the locking cups are partially deformed to prevent one or more of the nuts from working loose during reactor operation. The locking cups also prevent loose or broken end fitting parts from becoming entrained in the reactor coolant.

REFERENCES:
patent: 1201444 (1916-10-01), Davis
patent: 1212918 (1917-01-01), Dobbins
patent: 2385777 (1945-10-01), Ebert
patent: 2431735 (1947-12-01), Cyr
patent: 2737222 (1956-03-01), Becker
patent: 3125760 (1964-03-01), Foster
patent: 3142627 (1964-07-01), Emerson
patent: 3276967 (1966-10-01), Dodd
patent: 3431170 (1969-03-01), Lass

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