METHOD OF SAMPLING RADIOACTIVE SEDIMENT FROM STORAGE TANKS AND DEVICE TO THIS END Russian patent published in 2013 - IPC G21F9/34 

FIELD: process engineering.

SUBSTANCE: proposed method comprises full-hole drilling of well, preliminary feed of flushing fluid into strining bottom drilling pipe, and feeding drilled sediment into bottom drilling pipe. Drilled sediment inside said drilling string is subjected to additional grinding and loosening in drilling and slurrying. Suspension is transferred into protective dry box via central pipe arranged inside drilling string. Suspension is fed beck from dry box into tank. On reaching analysed interval, suspension is sampled in required volume. Besides, there is a device to sample radioactive sediment from storage tanks that comprises drilling string, cartridge with drill bit attached to bottom drill pipe. Central pipe is arranged inside drilling string and fitted in top dripping pipe via sealing assy and attached thereto by split joint. Top section of drilling pipe is brought into enclosed dry box and furnished with shutoff valve and connected to rotation drive via shaft while central pipe bottom section is furnished with rippers arranged on its outer surface.

EFFECT: higher reliability and safety.

5 cl, 3 dwg