INES-event
INES 3

Two occupational workers were injured by exposure of electron accelerator

Two occupational workers, Mr. Qiao and Wang were injured by exposure of high frequency-high voltage electron accelerator during its commission in Tianjin electrical wire factory. The energy of the accelerator is 2.5 MeV. Its cooling water tank under Ti window was needed to change cooling water pipe. On 21 November 1995, while the accelerator has high voltage, but no electron beam was provided, five workers entered the irradiation hall to change cooling water pipe for 7-8 minutes. They did not wear personal dosimeter. Two of them were exposed by electron beam which caused skin burns. Medical diagnosis indicated the injury belongs to III - IV degree burn. Mr. Qiao's burn area is about 10 x 20 cm2. Mr. Wang's burn area is about 5 x 5 cm2. Three other workers were not found abnormal after medical examination because they were far away from Ti window. Mr. Qiao and Wang were treated by skin transgraft on 9 January 1996. After operation they are in good health and recovery phase.
Justification:
This event is rated at level 3 due to events resulting in external doses to one or more workers leading to acute health effects according to II-2.2 definition of level of the INES User's manual.

Location: TIANJIN
Event date: Tue, 21-11-1995
Nuclear event report
Legenda & explanation