The Lan-Yu Storage Site provides off-site interim storage for solidified radioactive waste from 1982 to 1996. The site had stored 97,672 drums in total and has not received any radioactive waste since then. Because of the high temperature, moisture, and salty ambient atmosphere in Lan-Yu Island, many drums stored on site for decades had shown paint scaling or rusted, some waste in drums even presented solification deformation.
Concerning the management safety of Lan-Yu Storage Site, AEC had requested TPC to implement the waste storage modification program for corroded on site waste drums since 2007. The program has been completed in November 2011.