[en] The authors proposed an evaluation method for the barrier of packages (including cemented waste and drum containers) against the release of radioactive nuclides from the radioactive cemented waste into the environment at the time of ocean disposal, and thereby evaluated their barrier capacities by using the results of leach tests for cemented waste and corrosion test for drum containers. When test data was insufficient, calculation was carried out so that the leached-out amounts might be some what overestimated. (author)