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A worker fell into a nuclear reactor pool

nrc.gov

211–220 of 545 posts

Re: A worker fell into a nuclear reactor pool

#211

Earlier quoted context omitted.

A bite requires teeth. Sharks bite. Snakes bite. Bees and wasps sting. Jellyfish and bluebottles sting. Not sure about spiders. Are their fangs considered to be teeth? Platypus have venomous spurs, not sure what that’s called.

Mosquitos bite with their nose.

Oh I thought I couldn't hate them anymore and I learn this. My leg currently has large hives on it from multiple bites, the antihistamines I have are doing bugger all.

Re: A worker fell into a nuclear reactor pool

#212

Earlier quoted context omitted.

PDE5 (viagra, cyalis) improve the health of the cardiovascular system, thus improve kidney health and I greatly enjoy them. This is well researched and just like with semaglutide I believe a big part of the population should take daily tadalafil. Better cardiovascular health, more erections and many positive downstream effects (lower E:T ratio, weight loss) that are beyond the scope of this comment.

People should probably try improve their CV health via exercise, rather than pills, wherever possible.

Doctors have been telling us that for decades now and still noone does it despite overwhelming evidence. I guess the average Joe will always need a cheap workaround drug rather than putting themselves at any level of physical discomfort.

Re: A worker fell into a nuclear reactor pool

#213

Relevant from Randall Munroe https://what-if.xkcd.com/29/ > What if I took a swim in a typical spent nuclear fuel pool? Would I need to dive to actually experience a fatal amount of radiation? How long could I stay safely at the surface? > Assuming you’re a reasonably good swimmer, you could probably survive treading water anywhere from 10 to 40 hours. At that point, you would black out from fatigue and drown. This i…

That blog post is about the spent fuel pool. The link is about the reactor cavity.

Re: A worker fell into a nuclear reactor pool

#214

300 CPM in hair after decontamination is a massive red flag. If this is from systemic circulation, could be GBq-level total body activity. The non-emergency classification is bureaucratic nonsense. This is an internal contamination event with unknown but potentially severe consequences.

CPM is a measure of rate, GBq is a total amount. And 300 CPM is basically nothing. People live their entire lives in places where the natural background radiation is higher than that with no increased chance of cancer.

GBq is also a measure of rate; it's a billion decays per second.

Re: A worker fell into a nuclear reactor pool

#215

Earlier quoted context omitted.

PDE5 (viagra, cyalis) improve the health of the cardiovascular system, thus improve kidney health and I greatly enjoy them. This is well researched and just like with semaglutide I believe a big part of the population should take daily tadalafil. Better cardiovascular health, more erections and many positive downstream effects (lower E:T ratio, weight loss) that are beyond the scope of this comment.

People should probably try improve their CV health via exercise, rather than pills, wherever possible.

Why?

Re: A worker fell into a nuclear reactor pool

#216

Earlier quoted context omitted.

As you get older this pedantry gets really tiring.

There is a deeper point here, not just pedantry. The point is that harm is a spectrum not a binary and one cannot meaningfully answer a question that assumes a binary.

Yes, there is a such a thing as a bad question after all.

Re: A worker fell into a nuclear reactor pool

#218
post #215

Earlier quoted context omitted.

People should probably try improve their CV health via exercise, rather than pills, wherever possible.

Why?

Because of all the other physiological and mental benefits that come from the exercise that the pill won’t give you?

Re: A worker fell into a nuclear reactor pool

#219

Earlier quoted context omitted.

numbers matter. A human naturally gives off 0.2mSv/year. so basically you are emitting radiation right now, just very slowly. They had 300 counts per minute which would e around 6200 mSv year. But how much is that? the limit in a year for some body parts goes up to 500mSv year for workers. But that's if their body are getting that much radiation for the whole year. TL;DR you're always getting some ionizing radiation,…

> They had 300 counts per minute which would e around 6200 mSv year Are you sure about that? 6200 mSv is 6.2 Sv, which I understand to be near-universally deadly. That dosage would be profoundly incompatible with the news that the worker was being sent offsite to seek non-emergency medical attention. Poking around, it looks like "counts per minute" have to get converted to a dosage using an instrument-specific formul…

Rate matters. 6.2Sv in a single hour is fatal. 6.2Sv in a single year is probably less than average for a human from background radiation. The measurement units for ionizing radiation are very complicated and confusing. That's why people are told to not try to compute this stuff yourself. I have code that computes these units and conversions, its not simple. Here is a brief and simplified explanation of how you calculate this stuff.

There are 4 types of ionizing radiation: alpha, beta, gamma/x-rays and neutron flux. Each one has a different rate it is blocked by different materials (water, air, etc). Each one has a different risk to people. You have to compute counts per unit time emitted from a point source for each of the different types of radiation. Then you have to compute the amount of "arc" the person is in. Then you have counts being absorbed and you next multiply each count by a fixed factor depending on the type of radiation. This final number gives you total Greys per unit time, then you then have to divide by the mass of the person. Then you multiple that number by the total amount of time and that gives you total Greys absorbed. That's the number you use to assess risk to the person. For reference, this guy probably got less than 1 Grey. Someone getting radiation treatment for cancer might get 75 Greys.

So please stop trying to calculate this stuff yourself. I'm pretty sure you are doing it wrong. This guy will be fine.

PS Sieverts are a physical measure, Greys are a measure of biological "harm".

Re: A worker fell into a nuclear reactor pool

#220

Earlier quoted context omitted.

A bite requires teeth. Sharks bite. Snakes bite. Bees and wasps sting. Jellyfish and bluebottles sting. Not sure about spiders. Are their fangs considered to be teeth? Platypus have venomous spurs, not sure what that’s called.

Mosquitos bite with their nose.

They bite (and suck) with their (elongated and specialized) mouthparts. Insects don’t have noses (they breathe through their skin and smell primarily with their antennae).
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