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Nuclear Regulatory Commission Is Using Obviously Faulty Models to Pretend Crumbling Nuclear Reactors Are Safe via WashingtonsBlog

Ignoring Basic Engineering Science Puts Us All At Risk

Faulty assumptions by America’s financial regulators led to the 2008 crash … and many other disastrous results.

Similarly, America’s main nuclear regulator – the Nuclear Regulatory Commission – made numerous assumptions before Fukushima that turned out to be totally false. For example, the NRC wrongly assumed:

(1) The containment vessels in nuclear reactors always maintain their containment. In reality, Fukushima’s reactors lost all containment

(2) If radioactive gasses leak, they can only leak a maximum of 1% per day. In reality, Fukushima lost all of it’s radioactive gas every 8 hours (a 300% loss, since the leaking gas was replaced with newly-created radiation 3 times each day)

David Lochbaum – Director of the Nuclear Safety Project for the Union of Concerned Scientists, who worked as a nuclear engineer for nearly two decades, and has written numerous articles and reports on various aspects of nuclear safety and published two books – explained to Washington’s Blog some major erroneous assumptions that the NRC is making today about American nuclear plants:

The NRC has made some flawed assumptions. If you look at the chance of failure for a car, lightbulb or power plant, it’s governed by what’s called the “bathtub curve”. Specifically, the chance of failure is high early on due to material imperfections or assembly errors or the user just doesn’t know how to use the new “widget”. So there’s a break-in phase.

On the other side of the curve, the failure rate starts increasing again due to wear-out phase, due to aging, rusting, etc.

The NRC has been using that flat middle portion to justify reducing the frequency of inspections … even knowing that all of the plants are heading towards, if not already in, the wear-out phase, where the rate of failure starts increasing again.

So if you reduce the frequency based on the flat part of the curve, you may not be testing often enough, and things may break before you inspect and replace them.
[…]
Moreover, Lochbaum explained that the enormous power the government has to create incentives is leading to unsafe nuclear plants:

[Q] I understand that president Obama announced a nuclear renaissance in the U.S.

[A] This year alone we had 4 nuclear power reactors shut down due to unfavorable economics. A number of other plants that were proposed were cancelled due to costs. [Background.]

Many of the existing reactors have been operated with up to a 20% higher power level than they originally were built for or licensed for.

Many have already been that way and there’s also a few applicants that have submitted requests to the NRC to do upgrades at their plant.

In addition, more than three-quarters of existing reactors have sought and obtained 20 year extensions to the original 40-year operating lifetimes, and the others are in the process of doing so as well.

There’s now talk of going from 60 to 80 years. Nobody has done that yet, but there’s some talk of that.

The industry’s success in boosting operating output from existing plants and extending the life of the plants has been a major factor in preventing new reactors from being deployed, because you’ve pushed off the need for replacements.

[Q] Would the new reactors be safer in your view?

[A] Actually not, and it was actually the Federal government that prevented that, even though that was not their intent.

Back in 1957, the Federal government passed what is called the Price-Anderson Act, which provides federal liability insurance for plant owners and vendors.

Because of that – whether you’re the safest or the least safe reactor in the world – you pay the same insurance rate. In a more unrestricted marketplace, you have a safer car or a safer feature, your insurance premium is lower. So therefore a buyer can say “Yeah, it costs a little more up front, but I pay for that in 5 or 10 years down the road.

If you come up with a better mousetrap that costs more, the purchaser doesn’t get anything back.

So new reactors could be safer, because we’re smarter and we’ve learned more. But [federal insurance] makes it harder to sell, because the competitor down the road may not do that.

If a plant owner is looking at whether it would cost more to upgrade a 40 year old plant or to spend a little more to build a brand new reactor, the government is providing incentive for less safe things.

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