CBRN event in China on Fri 5th January 1996

A young worker, Mr Song who is not a radiation worker, was injured by an overexposure of an Ir-192 source lost from a gamma radiograph in the Construction Site for 300 kt Polyethylene Project of Jihua.
The Ir-192 source slipped out from the container of the gamma radiograph and dropped on the ground of the site when the container was carried and moved. Because the key to the safe lock of the container broke, the shutter cannot be locked.
The exposure dose received by the worker was estimated by experts to be 3 Gy of the whole body dose the 3 KGy of maximum surface dose at the right leg.
Justification of rating:
This event is rated at Level 3 due to acute health effect to a member of the public according to off-site impact from a lost source described in the report of the second meeting of the INES Advisory Committee.