Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – Shield or barrier between radiation or heat source and...
Patent
1984-12-24
1989-05-30
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
Shield or barrier between radiation or heat source and...
376204, G21C 1302
Patent
active
048349356
ABSTRACT:
A feedwater sparger assembly, and more particularly a thermal sleeve device, to prevent relatively cold feedwater from contacting the vulnerable surfaces of a feedwater nozzle in a boiling water nuclear reactor. Inner and outer concentric tubular thermal sleeve members (42,56) span the distance between the sparger (12) and a substantially cylindrical transition surface (34) machined into the feedwater nozzle (14) or pipe (22). At the first ends (46,64) of the tubular members, adjacent the transition surface (34), a packing means (50), is deformed against the transition surface (34). The second ends (60,62) of the tubular members are operatively connected to the sparger (12). One of the tubular members (42,56) is rigidly connected to the sparger (12) and the other tubular member is mounted on the sparger such that it can be longitudinally moved relative to the rigidly connected member. This longitudinal movement compresses the packing and intensifies an interference fit (78) between an outer surface (66) of the outer member (56) and the transition surface (34 ) to provide a fluid-tight seal.
REFERENCES:
patent: 3818935 (1974-06-01), Karker et al.
patent: 4356147 (1982-10-01), Borrman et al.
patent: 4655483 (1987-04-01), Margotta
Diwinski et al., "Boiling Water Reactor Feedwater Nozzle Cladding Removal", TIS-5362, CE Inc., 1977.
"Dodewaard Werd Gerepareerd Met de Stopwatch Ind Dh Hand", 1983.
"Grafoil", Union Carbide, Nuclear News, Jun. 1986, Reader Service, No. 176.
Daigle Roland P.
Lopez Javier O.
Ouevedo del Rio Federico
Combustion Engineering Inc.
Klein Richard L.
Kyle Deborah L.
Mulholland John H.
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