Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – Position detection
Patent
1989-01-10
1990-09-04
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
Position detection
G21C 1700
Patent
active
049543113
ABSTRACT:
In a boiling water nuclear reactor having its core, fuel support casting, and control rod guide tubes removed to expose the core plate, an apparatus and method for the repair and replacement of the control rod drive housing at the bottom extremity of the reactor vessel is disclosed. The apparatus registers to a hole in the core plate and its corresponding guide pin. A mating fixture on the depending extremity of the shaft of the apparatus precisely fits and mates to the top of the control rod drive housing. The alignment device includes cross electronic levels sealed for submersion which levels remotely transfer through attached wiring the precise angularity between the top of the control rod drive housing on one hand and the corresponding and overlying hole in the core plate on the other hand.
REFERENCES:
patent: 2395393 (1946-02-01), Brilliantine
patent: 3165835 (1965-01-01), Duncan
patent: 4420455 (1983-12-01), Qurnell et al.
patent: 4439925 (1984-04-01), Lock
patent: 4696786 (1987-09-01), Frizot et al.
patent: 4704801 (1987-11-01), Frizot et al.
Deaver Gerald A.
Dixon Robert C.
Erbes John G.
Offer Henry P.
Punches James R.
General Electric Company
Schroeder Robert R.
Wasil Daniel D.
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