INES-event
INES 1

INADVERTENT DISCHARGE OF LIQUID RADIOACTIVE WASTE

During routine sampling of water from storm drain on May 8, 1995, an activity of 10 Bq/litre predominantly Caesium-137 was detected in the open drain coming from the Waste Immoblisation Plant (WIP), Tarapur Complex. Investigations carried out revealed the source of activity to be the steam condensate from the steam coil of concentrator of WIP. The event is rated at level 1 of INES.
Justification of Rating: the maximum estimated total discharge was only about ten giga bequerels of Ruthenium-106 (equivalent) which is way below the criteria for rating under on-site impact criteria as per 1.2.2 of user's manual. The event is thus rated at level 1 as per 1.2.2 (last paragraph) and IV-5.1.3 (spread of contamination).

Location: TARAPUR WASTE IMM. PLANT
Event date: Mon, 08-05-1995
Nuclear event report
Legenda & explanation