On Answering Questions

I got into an argument last night on Twitter about hazards around the Zaporizhzhia Nuclear Power Plant. The other person argued that I should have emphasized worst cases and had a couple poorly thought out. What I try to do in my posts on such things is to answer the question “What is likely?” I think that’s what most people want to know.

“What is likely?” is different from “What is the worst thing that can happen?” It also takes more work to answer. Probabilities, quantitative information, and subjective judgments all enter in. Unfortunately, a large number of nuclear experts, particularly those opposed to civilian nuclear power or nuclear weapons, have used the worst-case approach. It’s time for them to change.

There’s a lot of quantitative or semi-quantitative information available on ZNPP. Much of it can be treated as “more than” or “less than” something else. For example, there is much more containment at ZNPP than there was at Chernobyl. Probabilities can be arranged in a rough order.

The worst thing that can happen requires multiple failures in the system. The Chernobyl reactor, under normal operating conditions, contained design flaws that were failures waiting to happen. A poorly thought out experiment at a time of night when few other operators were available set off the cascade. The earthquake and tsunami at Fukushima, along with poor engineering against them, set off multiple failures there.

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The Danger At Zaporizhzhia Nuclear Power Plant

Ukrainian warnings are becoming more urgent that the Russians plan an incident at the Zaporizhzhia Nuclear Power Plant. The warnings have been coming for about a week. The latest is that explosives have been rigged on top of two of the reactor buildings to simulate Ukrainian shelling of the plant. Other accusations are that the plant or the pond that holds the cooling water for the plant are mined.

The Russians are countering with accusations of their own.

Rafael Mariano Grossi, the Director General of the IAEA, has visited the plant recently, and two IAEA staff have been stationed at the plant. He says that the parts of the plant he has seen are not mined, but he has not seen everything he wants to see. He plans to go back in the near future.

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Russia Opens The Floodgates

Russia controls one side of the Kakhovka Dam at the end of the Kakhovka Reservoir on the Dneiper River. Back when Russia was withdrawing to the east side of the Dneiper, they exploded a couple of mines at the dam.

The reservoir provides drinking water to many Ukrainians and is the main water supply to Crimea, where they have been filling reservoirs. It is also the only water supply to the Zaporizhzhia Nuclear Power Plant. The reactors at ZNPP are shut down, but they still need cooling water. The intake pipe extends some way into the reservoir. A large supply of cooling water will be essential if the reactors are to be started up again.

Since November, the Russians have been draining the reservoir. Geoff Brumfiel of NPR has the story.

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Russia Continues To Put The Zaporizhzhia Nuclear Plant At Risk

The Russians are…shelling the Zaporizhzhia Nuclear Plant?

This does not make sense, but neither do any of Russia’s actions toward the plant. They took the plant by shelling it and caused a fire that destroyed one of the administrative buildings. They are rumored to have mined the plant. The Ukrainian operators are effectively prisoners. The Russians regularly shell the nearby city where the operators’ families live.

There are a couple of possibilities, not mutually exclusive, for why the Russians took the plant. First, it would be consistent with a plan to grab all of Ukraine and install a puppet government, which seems to have been the initial Russian intent. Having control of power plants would be a good thing. The Russians seized Zaporizhzhia early, along with a couple of hydroelectric power plants. Second, it is a relatively safe military base because the Ukrainians have the good sense not to shell a nuclear plant. The district in which it is located, Zaporizhzhia, is one of the ones that Russia has said it plans to incorporate as it did Donetsk and Luhansk.

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Russian Sanctions And Civilian Nuclear Power

We’re just beginning to see the effects of shutting Russia out of the world economy.

Russia has been a big supplier of nuclear power plants. About 1 in 3 being built around the world is Russian. South Korea is another potential supplier, and China might like to expand its market share.

But if Russia is out of the market, building of nuclear power plants will slow down. Those currently under construction may falter because their financing comes through Sberbank, also sanctioned.

In the United States, Westinghouse is once again up for sale, having been through a bankruptcy and sale to somewhat hidden owners. They are being less than transparent about the sale.

Saudi Arabia has issued an inquiry for construction of two 1400 Mwe nuclear plants. The responses to that may show how things will go with Russia sanctioned.

A number of new companies want to offer small modular reactors, but it’s not clear when they’ll be ready for installation.

There is a small move toward recognizing nuclear power as a way to supply electricity with much less carbon dioxide going into the atmosphere. Not at all clear how this will turn out.

[This post is based on John Quiggin’s at Crooked Timber and is close in content, although I’ve added a bit.]

Graphic: A NuScale Power module on a truck. NuScale is one of the small modular reactor companies whose designs are going through pre-licensing approval with Canada’s nuclear regulator. Many are designed to be small enough to transport by truck or by shipping container. (NuScale Power)

Cross-posted at Lawyers, Guns & Money

Russia’s Get Rich Quick Nuclear Scheme – Oh Wait

A few days ago, A Russian statement claimed that electricity would be sold to Ukrainians from the Russian-occupied Zaporizhzhe nuclear power plant. If Ukrainians didn’t take up that offer, the electricity would go to Russia. Either way, Russia wins.

Not so fast. Russia does not share an electrical grid with Ukraine, so the electricity from Zaporizhzhe can’t be sent there.

The reasons for occupation of the plant are a bit of a mystery. It was taken early in Russia’s campaign against Ukraine, so perhaps it was part of the plan to take control of Ukraine with the help of internal collaborators in the first three days.

The overall occupation didn’t work, but the Russians still hold Zaporizhzhe, so they are trying to make the best of it.

Cross-posted to Lawyers, Guns & Money

Zaporizhzhia Nuclear Power Plant Attack

Thursday night (March 3) I was about to make my usual move to the living room to read dead-tree magazines and books with the cats, and a black and white, hard-to-decipher livecam picture showed up on my Twitter feed. A firefight at Zaporizhzhia, Ukraine’s largest nuclear power plant!

I am in touch with a loose network of people with skills to interpret these reports, and we went into action. First thing was to figure out where the camera was at the plant and what we were looking at. Get a map of the plant. Figure out what we were seeing on the video and if it was genuine.

Twitter was panicking, as so often happens when anything happens with nuclear reactors or radiation mentioned, so I wanted to get out whatever information I could as fast as I could. Others were doing the same.

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Mike Flynn’s Nuclear Adventure – The Plan

The plans offered by ACU and IP3, the companies working with Michael Flynn on a scheme to sell reactors to Saudi Arabia, have many problems. Some, perhaps all, of those problems may arise from naivete about the nuclear industry and the regulations surrounding it. Looking at the plans and how they changed over time may help in understanding what these companies were doing. Read More

Mike Flynn’s Nuclear Adventure – The Companies

Since elements of the story first appeared, I have been intrigued by the idea that Michael Flynn wanted to sell nuclear reactors to the Saudis. Too much of it doesn’t make sense and still doesn’t. A few things I’ve wondered about:

  • Flynn has no experience with nuclear reactors.
  • Why nuclear reactors? There are a great many problems in selling in building them.
  • Why Russian reactors?
  • Why is the administration so persistent in pushing this deal?

Most importantly, is this activity connected to other varieties of Trumpian corruption?

A simple theory can explain this. The Saudis want nuclear reactors to eventually build a nuclear weapons program. Flynn was at the head of a group of Trump-connected grifters who wanted to make money from that desire. Informed by a profound ignorance of nuclear economics and nonproliferation, it explains everything in a general way, but others also have the uneasy feeling that it’s more than that. Read More