Tepco applies to the NRA for permission to finish the Fukushima Daiichi ice wall. Closure of the wall has been throttled down by Tokyo’s Nuclear Regulation Authority due to fears concerning groundwater outside the turbine buildings falling below the level of water inside. Tepco has been forced to freeze the last half-dozen seven-meter-wide sections individually, wait to see what it does to external groundwater levels, and then proceed to the next section if groundwater level is maintained according to plan. One section on the inland side of the 1.5 kilometer ice structure is all that needs to be activated to complete the wall. To date, the sequential closure of Tokyo-mandated gaps has dropped the groundwater influx from 400 tons per day down to about 100 tons per day. No projections are being made as to how much more the in-flow will abate after the last part of the wall is frozen.
There are plenty of white noise generator apps available, just experiment and if you find something that seems to help set a timer. It will help getting to sleep. Rest is so important.