Supercritical solar - new frontier for power generation

CSIRO has used solar energy to generate hot and pressurised ‘supercritical’ steam, at the highest temperatures ever achieved in the world outside of fossil fuel sources.Supercritical steam is a breakthrough for solar energy and means that one day the sun could be used to drive the most advanced power stations in the world, currently only driven by coal or gas.CSIRO’s Energy Director, Dr Alex Wonhas said this milestone is a game-changer for the renewable energy industry.”It’s like breaking the sound barrier; this step change proves solar has the potential to compete with the peak performance capabilities of fossil fuel sources.”Instead of relying on burning fossil fuels to produce supercritical steam, this breakthrough demonstrates that the power plants of the … »

Source: Solar News

Solar photons drive water off the moon

Research provides measurements for scientists searching for water in solar systemWater is thought to be embedded in the moon’s rocks or, if cold enough, “stuck” on their surfaces. It’s predominantly found at the poles. But scientists probably won’t find it intact on the sunlit side.New research at the Georgia Institute of Technology indicates that ultraviolet photons emitted by the sun likely cause H2O molecules to either quickly desorb or break apart. The fragments of water may remain on the lunar surface, but the presence of useful amounts of water on the sunward side is not likely.The Georgia Tech team built an ultra-high vacuum system that simulates conditions in space, then performed the first-ever reported measurement of the water photodesorption cross… »

Source: Solar News

Preceding frozen water wall hasn’t worked since April

Related to this article.. Fukushima worker “Frozen wall was originally designed to stand with clay wall but they removed to cut the cost.” [URL]

A preceding part of the frozen water wall hasn’t been frozen for over a month, according to Tepco.

Tepco has started installing the frozen water underground wall to isolate 4 reactor buildings in Fukushima plant. Preceding the wall, Tepco installed the same wall in underground trench of the seaside of Reactor2 and 3.

Approx. 11,000 t of highly contaminated water is assumed to be retained in this trench to leak to underground and the Pacific.

This was an attempt to stop additional contaminated water flowing from reactor2 turbine building to this trench by freezing water like a wall. However even though they have been trying to freeze the water since the end of April, the water hasn’t been frozen by now.

They assume it is because the inner structure prevents water from being frozen and also the contaminated water is still flowing.

You read this now because we’ve been surviving until today.

Source: Fukushima

Japanese Govt.; Evacuating Around Fukushima Daiichi Would Take 5 Days

Interviews given to the government investigation of the Fukushima disaster and released by Asahi Shimbun showed the reality of evacuation attempts. Tetsuro Fukuyama, a deputy cabinet minister was put in charge of announcing evacuations related to the unfolding disaster at Fukushima Daiichi.
Fukuyama admitted that evacuating the 30km zone would take 4-5 days. The government ordered evacuations first for those closest to the plant (3km) hoping to get those in the most danger out first. As conditions at the plant continued to worsen they asked those within 10km to leave. He admitted that the staged evacuations and requests that those further out shelter where they were was due to the inability to get everyone out. They hoped to avert even larger traffic jams.
Fukushima Daiichi is located in a mostly rural stretch of the Fukushima prefecture coast. Other nuclear plant locations in Japan have more difficult terrain, roads and larger populations. The conditions …

Source: Fukushima Sub