Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – Optics
Patent
1984-04-16
1986-07-22
Jordan, Charles T.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
Optics
277 3, 277 34, 277 59, 356142, 358100, 376203, G21C 1700, G21C 1920
Patent
active
046018727
ABSTRACT:
A water sealing device suitable for use when a control rod drive housing welded to a stub tube and extends through a wall of a reactor pressure vessel is replaced, singly or with the stub tube, by a new one, including a sealing cylinder temporarily inserted in a control rod guide tube opening for providing a cylindrical space in which the control rod drive housing is located to shut out water in a core from the vicinity of the control rod drive housing. The sealing cylinder has a centering mechanism including a tester support portion located on an inner peripheral surface of the sealing cylinder for supporting an alignment tester for testing the alignment of centering targets mounted on upper and lower end portions of the control rod drive housing, and a tapered centering portion mounted on an outer peripheral surface of the sealing cylinder and brought into contact with a wall of the control rod guide tube opening when the sealing cylindr is temporarily inserted therein, to mount the sealing cylinder concentrically in the control rod guide tube opening through the tapered centering portion. The sealing cylinder also has a multiple seal located at a lower end portion of the sealing cylinder to allow the sealing cylinder to be brought into sealing contact with an inner wall surface of the reactor pressure vessel. Compressed air is introduced into a space in the multiple seal through the sealing cylinder.
REFERENCES:
patent: 3514115 (1970-05-01), Gallo
patent: 3716245 (1973-02-01), Turolla
patent: 3717352 (1973-02-01), Jansing et al.
patent: 4191471 (1980-03-01), Courten et al.
patent: 4284475 (1981-08-01), Anthony
patent: 4292133 (1981-09-01), Sasaki et al.
patent: 4335883 (1982-06-01), Le Roux et al.
patent: 4432931 (1984-02-01), Lockett
patent: 4440339 (1984-04-01), Tamai et al.
patent: 4448425 (1984-05-01), von Bergen
patent: 4470946 (1984-09-01), Vassalotti et al.
Iwama Tsugio
Tamai Yasumasa
Yada Yoshio
Hitachi , Ltd.
Jordan Charles T.
Klein Richard L.
LandOfFree
Water sealing device for use in replacing control rod drive hous does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water sealing device for use in replacing control rod drive hous, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water sealing device for use in replacing control rod drive hous will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-865202