Monthly Archives: April 2011

How to go back to the Moon, cheaply

Posted in Uncategorized | Tagged , , , , , , | Leave a comment

American Soyuz/Delta Heavy Lunar Mission

As shown at far right in this diagram from wikipedia, the Delta IV Heavy is a US rocket vehicle capable of placing 23,000 kg into low earth orbit. This happens to be almost one fifth of the payload capacity of … Continue reading

Posted in Uncategorized | Tagged , , , | 1 Comment

An American Soyuz

The 50th anniversary of the first human flight into space comes with the United States about to retire the Space Shuttle. This means that the US will no longer have the ability to place humans into space on its own. … Continue reading

Posted in Uncategorized | Tagged , , , , | Leave a comment

Fukushima coolant recirculation with siphon

This design avoids damage to recirculation pumps from sea water sediment. A gravity siphon is used to draw water out of the building into a pit where sediment is collected into a shipping container. Water is then pumped from the … Continue reading

Posted in Uncategorized | Tagged , , , , , | Leave a comment

Coolant Recirculation System at Fukushima

They’ve been using sea water to cool the rods, but when the level threatens to overflow the reactor buildings, they’re flushing the water back into the ocean (ref here and here). This is an obvious radioactivity hazard to the environment, … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment

Teleoperated Radioactivity Sample Boat

The high levels of radioactivity in the waters off the Fukushima nuclear plant require constant monitoring, which is best conducted without exposing human workers. Hence this design for a teleoperated radioactivity sample boat. To make the modification effort as simple … Continue reading

Posted in Uncategorized | Tagged , , , , , | Leave a comment

A Roof for Fukushima

On the right is the baseball stadium known as Safeco Field in Seattle, USA. It is famous for its retractable roof, which rolls back for sunshine on the rare days in Seattle when there is sunshine. Why bring this up? … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment

Fukushima Cooling Pump Cascade

A German concrete pump is being used at Fukushima to spray cooling water on the spent fuel rods. Now that the plant’s own cooling pumps are down and the cooling pools are empty of water, this pump may be all … Continue reading

Posted in Uncategorized | Tagged , , | Leave a comment

Fukushima: Removing Spent Fuel Rods

If you’ve ever looked at Fairewinds Associates videos, you know that the big problem at Fukushima is the drying up of the cooling pools which are suspended over the reactor vessel and contain the spent (but extremely radioactive) fuel rods. … Continue reading

Posted in Uncategorized | Tagged , , | Leave a comment

Japan’s Choice: Go Solar or Go Dark

“Japan’s dim capital faces further power crunch” (Associated Press, April 3): About 9 million kilowatts of capacity may be gone forever as the radiation-leaking Fukushima Dai-ichi nuclear plant is likely to be scrapped and the future of the halted Dai-ni … Continue reading

Posted in Uncategorized | Tagged , , , , , | 1 Comment