METHOD FOR DEACTIVATING CAPSULE WITH IONISING RADIATION SOURCE Russian patent published in 2015 - IPC G21F9/00 

FIELD: chemistry.

SUBSTANCE: method involves the sequential processing of a capsule with an acid solution and washing the capsule with an aqueous solution, which are heated to bubble heating. The capsule placed into the first container is washed for 10-20 minutes in boiling distilled water; the washed capsule placed into the second container is deactivated for 10-20 minutes by boiling 7-10% nitric acid; the second container is cooled down together with the capsule for 10-20 minutes. After cooling down, the nitric acid 50 ml is sampled from the second container to measure its radioactivity. If the sample radioactivity is less than 0.2 kBq, the capsule is considered to be clean, otherwise the washing and deactivation procedures are repeated with using boiling pure distilled water and 7-10% nitric acid to produce samples having a radioactivity of less than 0.2 kBq.

EFFECT: simplifying the technology and reducing the cost price of deactivating the capsule with ionising radiation source.

2 cl