Tokyo Electric Power Co. says it has placed tons of ice blocks in underground trenches at the Fukushima No. 1 complex in an attempt to freeze highly toxic water pooled there, a necessary step before a 1.5-km ice wall can be constructed to keep groundwater out. japantimes.com

Even before the ink was dry on last fall’s interim nuclear deal with Iran, some members of Congress bemoaned the “naiveté” behind its formulation and predicted that the Iranians would fail to implement its terms. nationalinterest.org

Shares in French nuclear power group Areva closed 20 percent lower on Friday, the worst fall since the company was formed in 2001, as it posted a first-half loss, exited a thermal solar power business and cut sales targets. nuclear-news.net

Angela Kane, High Representative for Disarmament Affairs, delivered a message from the United Nations Secretary-General Ban Ki-moon, to the World Conference against Atomic and Hydrogen Bombs, in Hiroshima today. un.org