North Korea shows off new nuclear complex

Experts caution, however, that true hydrogen bombs are quite difficult to make, so it seems unlikely that North Korea would succeed in that step anytime soon.

North Koreans Unveil Vast New Plant for Nuclear Use, NYTimes.com, By DAVID E. SANGER November 20, 2010 WASHINGTON — North Korea showed a visiting American nuclear scientist last week a vast new facility it secretly and rapidly built to enrich uranium, confronting the Obama administration with the prospect that the country is preparing to expand its nuclear arsenal or build a far more powerful type of atomic bomb……..

The scientist, Siegfried S. Hecker, a Stanford professor who previously directed the Los Alamos National Laboratory, said in an interview that he had been “stunned” by the sophistication of the new plant, where he saw “hundreds and hundreds” of centrifuges that had just been installed, and that were operated from what he called “an ultra-modern control room.” The North Koreans claimed 2,000 centrifuges were already installed and running, he said.

American officials know that the plant did not exist in April 2009, when the last Americans and international inspectors were thrown out of the country. The speed with which it was built strongly suggests that the impoverished, isolated country, which tested its first nuclear device in 2006, had foreign help and evaded strict new United Nations Security Council sanctions imposed to punish its rejection of international controls……………The North’s current arsenal of 8 to 12 weapons are all based on plutonium, harvested from the waste of a reactor that has been partially dismantled. But uranium, enriched to bomb grade, can also be used to drastically increase the destructive power of a nuclear blast, and that is the main use of uranium in modern arsenals, including the warheads of the United States.Experts caution, however, that true hydrogen bombs are quite difficult to make, so it seems unlikely that North Korea would succeed in that step anytime soon.

North Korea Working With Uranium at Vast New Plant – NYTimes.com

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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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