Sealed head access area enclosure

Details Sealed head access area enclosure Sealed head access area enclosure

1976-07-28

1978-03-14

Nelson, Peter A.

176 38, G21C 1306

Patent

active

040789683

ABSTRACT:
A liquid-metal-cooled fast breeder power reactor is provided with a sealed head access area enclosure disposed above the reactor vessel head consisting of a plurality of prefabricated structural panels including a center panel removably sealed into position with inflatable seals, and outer panels sealed into position with semipermanent sealant joints. The sealant joints are located in the joint between the edge of the panels and the reactor containment structure and include from bottom to top an inverted U-shaped strip, a lower layer of a room temperature vulcanizing material, a separator strip defining a test space therewithin, and an upper layer of a room temperature vulcanizing material. The test space is tapped by a normally plugged passage extending to the top of the enclosure for testing the seal or introducing a buffer gas thereinto.

REFERENCES:
patent: 2821325 (1958-01-01), Chapellier et al.
patent: 3318780 (1967-05-01), Bohmann et al.
patent: 3514115 (1970-05-01), Gallo
patent: 3752738 (1973-08-01), Naymark
patent: 3937651 (1976-02-01), Schabert et al.
patent: 3987860 (1976-10-01), Jabsen
patent: 4022656 (1977-05-01), Durston et al.

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