Tube sheet retractable probe

Details Tube sheet retractable probe Tube sheet retractable probe

1997-05-27

1999-04-20

Noland, Thomas P.

Measuring and testing

Probe or probe mounting

G01N 1704, G01M 1900

Patent

active

058958703

ABSTRACT:
A retractable probe for placing and removing corrosion coupons from a steam generator during chemical cleaning of the steam generator, the chemical process occurring at a relatively high pressure and temperature. The probe includes a series of inner-linked and hinged sections which may be manipulated to insert the probe within and through the various structures of the steam generator, including the shell and shroud, while avoiding contact with tie rods and blow down lines and facilitating easier operation within the tight confines of the barriers surrounding the generator system. A bendable Teflon.RTM. rod is used to withdraw the coupon through the differently angled sections of the probe and eventually through the nozzle opening or man-hole of the shell. A selectively openable valve is utilized in combination with a packing gland. This combination allows the coupon to be removed while the steam generator is being cleaned or operated.

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