• A storage tank’s radioactive water leak is fully contained at F. Daiichi. The leak was from one of the bolted-together tanks that are still being used. 32 liters (~8.5 gallons) seeped from a bolted seam, but was entirely contained by the coffer dam surrounding the cluster the tank is in. The tank holds mostly fully-treated water, but it contained some highly-contaminated residual water from its original content before the refilling. Thus, the water in the coffer dam tested out at 5.9×105 Becquerels per liter of Beta-emitting isotopes. Some of the bolted-seam tanks had leakage in the past, and Tepco has replaced as many as possible with all-welded seam tanks. But, making welded-seam tanks cannot keep up with the accumulation of contaminated water, so bolted-seam tanks are still needed. http://www.asahi.com/ajw/articles/AJ201610070036.html