Cleaning mechanism for penetration interfaces in nuclear pressur

Details Cleaning mechanism for penetration interfaces in nuclear pressur Cleaning mechanism for penetration interfaces in nuclear pressur

1988-04-27

1990-03-27

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Miscellaneous

15 17, 15 3, 15 88, 134102, 376316, B08B 300, B08B 500

Patent

active

049108239

ABSTRACT:
A method and apparatus, comprising a tool having a clam shell design, for sealing the interface volume between the internal wall of a reactor pressure vessel and submerged piping that penetrates the wall, and for cleaning the interface volume using a series of hydraulic and pneumatic operations. The tool is operable from a remote suface location, using a robotic arm for fine positioning, to clamp around the penetrating pipe. Hydraulic nozzles compressed air and mechanical brushes on the tool may be used to dislodge sediment in the interface volume.

REFERENCES:
patent: 4762671 (1988-08-01), Kobayashi et al.

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