Device and method for thermally insulating a structure to preven

Details Device and method for thermally insulating a structure to preven Device and method for thermally insulating a structure to preven

1993-08-02

1994-09-27

Yuen, Henry C.

Heat exchange

With thermal or acoustical blocker

122511, 122 34, F28F 1300

Patent

active

053500113

ABSTRACT:
Device and method for thermally insulating a structure to prevent thermal shock therein, which structure may be a feedwater inlet nozzle of the kind typically found on nuclear steam generators. The device comprises a sleeve extending into the bore of the nozzle for thermally insulating the nozzle and joined to the nozzle to affix the sleeve to the nozzle. The sleeve is so joined to the nozzle so as to define a joint therebetween. A liner is concentrically disposed in the sleeve so as to cover the joint to thermally insulate the joint and joined to the sleeve for affixing the liner to the sleeve. The nozzle may have a temperature significantly higher than the cooler feedwater flowing through the bore in the nozzle thereby giving rise to a potential for thermal shock in the nozzle, which thermal shock in turn may induce metal fatigue in the nozzle. The device, as it is disposed in the bore of the nozzle, thermally insulates the nozzle to prevent thermal shock and metal fatigue therein.

REFERENCES:
patent: 2604081 (1952-07-01), Henc
patent: 3029796 (1962-04-01), Simmons et al.
patent: 3743780 (1973-07-01), Camp
patent: 4057033 (1977-11-01), Schlichting et al.
patent: 4079701 (1978-03-01), Hickman et al.
patent: 4368694 (1983-01-01), Ward et al.
patent: 4552210 (1985-11-01), Malaval
patent: 5083529 (1992-01-01), Sundheimer

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