Japan Studying Nuclear Waste Burial 5,000 meters Deep on the Pacific Island of Minamitorishima

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An agency affiliated with the Japanese government is to study the possibility of burying nuclear waste at a depth of about 5,000 meters. That’s much deeper than proposed in the government’s current plan.

Researchers from the Japan Agency for Marine-Earth Science and Technology, or JAMSTEC, will carry out a basic survey for the new disposal option after next April.

The survey will be conducted at Minamitorishima, a remote island above the geologically stable Pacific Plate.

JAMSTEC says it will use a research vessel to collect data on the topography and geology of the area.

No technology exists to bury nuclear waste 5,000 meters below ground as there are many technical challenges.

The Japanese government has been planning to bury high-level radioactive waste from nuclear plants at a depth of more than 300 meters in final disposal facilities. Officials are currently looking for candidate sites.

Nagasaki University Professor Tatsujiro Suzuki is a former member of Japan’s Atomic Energy Commission. He says it is too soon to discuss a technology that has yet to be developed, but he thinks basic research by the agency could help to create more options.

https://www3.nhk.or.jp/nhkworld/en/news/20161225_17/

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Energy efficiency – theme for July 2019

Energy efficiency represents the single largest potential contributor to global emissions reduction, according to the International Energy Agency (IEA 2017). It should be a key part of the global energy strategy, for several reasons:

It could reduce global electric demand by more than 20 per cent, based on current rates in the U.S. power sector, while maintaining high levels of services such as heating and lighting.
It avoids the need for increased energy, capacity and grid services, making it the least expensive way to decarbonise at scale.
It can reduce carbon dioxide emissions by billions of tonnes.

A dramatic example of the power of energy efficiency is lighting. In 2017 the United States passed the milestone of 1 billion LED and CFL lights installed, avoiding 142 million tonnes a year of carbon dioxide emissions, at a cost of about $7 per ton of avoided carbon dioxide. In contrast, the cumulative installed capacity of rooftop solar reached 8,000 MW in 2017, saving 8 million tonnes a year of carbon dioxide, at a cost of $360 per ton. Lighting efficiency thus yielded almost 18 times the avoided carbon dioxide, at about 2 per cent the cost per ton of rooftop solar.

Google provides another example of the power of energy efficiency. Its data centers now use 50 per cent less energy than the average data center, according to the company. Google also developed an improved chip, the TPU, which performs 83 times better than standard CPUs. The new chip allowed Google to reduce power consumption at its data centers by a factor of 30—far exceeding the effect on Google’s carbon footprint of all of the company’s renewable energy purchases. ” – John Woolard, Eco Business, 10 June 2019

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