The Radioactive Substances (Hospitals) Exemption Order 1990

Conditions

7.  If there are reasonable grounds for believing that any radioactive material to which article 3(2) above applies has escaped from its container, store or the part of the premises where it is kept or used or that it has been lost or stolen—

(a) the incident shall be investigated without delay;

(b) the chief inspector shall be informed in writing within 7 days;

(c) if an escape is suspected, steps shall, so far as is reasonably practicable, be taken to prevent any further escape and to minimise the spread of contamination;

(d) if loss or theft of radioactive material with an activity in excess of 200 kilobecquerels is suspected, the police shall be informed as quickly as possible and all such steps as are reasonably practicable shall be taken to recover the material.