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A worker fell into a nuclear reactor pool

nrc.gov

361–370 of 545 posts

Re: A worker fell into a nuclear reactor pool

#361

Earlier quoted context omitted.

Wow, people are really clueless about how nuclear power plants really work. It's really not that dangerous to fall into the water.

Might be. If the reactor was recently defueled, especially, might there be more junk floating in the water? If said junk was alpha- or beta-emitting, it could be enough of a danger for cancer.

It almost sounds plausible but it's not. All fuel is extremely heavy elements that in still water falls down and deposits on the bottom.

Re: A worker fell into a nuclear reactor pool

#362
post #339

Earlier quoted context omitted.

TFA says: “The individual was decontaminated by radiation protection personnel but had 300 counts per minute detected in their hair. At 1632 EDT they were sent off site to seek medical attention.” Apparently they do have concerns.

300 counts per minute is nothing, almost indistinguishable from standing in a grocery store.

Not only that, but CPM (Counts per min) is measurement device specific. Using a very sensitive pancake probe will generate much higher CPM than a geiger tube from the same source. You have to look at calibrated units (usV/hr for example). Of course uSv has it own problems given the exposure model.. but better than CPM!

Re: A worker fell into a nuclear reactor pool

#363

Why is this interesting? Workers gets injured all the time and sometimes even die on various accidents in all industries and nobody ever talk about it. Is this anti-nuclear propaganda?

I guess that U.S. Nuclear Regulatory Commission is required to report any unusual events in the plants in the US, which would be reasonable. A worker falling into a nuclear reactor pool is unusual. The report itself doesn't seem like it's anti-nuclear in any way, and it clearly states "no impact on the health and safety of the public or plant personnel".

If you're asking why it's interesting for HN, I think it's actually because people are fascinated with nuclear, in a positive way.

Re: A worker fell into a nuclear reactor pool

#365
post #229

Earlier quoted context omitted.

dunno if the life vest bit comment of yours was sarcastic, but it is a funny remark for sure :-) it sounds like "guy felt down in a volcano, but fortunately, he had a life vest"

Wow, people are really clueless about how nuclear power plants really work. It's really not that dangerous to fall into the water.

Few fun riffs for a Sunday morning:

Wow, people are really clueless about how nuclear power plants really work. They literally wrote up a safety report and transported them off-site.

Wow, people are really clueless about how to avoid reacting angrily. It's funny to append "they were wearing a life vest" to "they had a nuclear safety accident"

Re: A worker fell into a nuclear reactor pool

#366
post #339
post #246

Earlier quoted context omitted.

My understanding is that reactor and waste pools are some of the least radioactive environments as they are constantly monitored for leakage.

TFA says: “The individual was decontaminated by radiation protection personnel but had 300 counts per minute detected in their hair. At 1632 EDT they were sent off site to seek medical attention.” Apparently they do have concerns.

[flagged]

Re: A worker fell into a nuclear reactor pool

#367

Is he going to die no matter what or is this survivable?

He will be fine. He might not still have his job in a few months but other that, he will be fine. 300 CPM isn't even close to dangerous. You get a higher dose every time you fly in an airplane, or go to La Paz, Bolivia.

According to https://www.mlive.com/news/2025/10/michigan-nuclear-plant-wo... he returned to work the next day (presumably at the nuclear reactor) and only suffered minor injuries due to the fall.

Re: A worker fell into a nuclear reactor pool

#368

Hopefully the worker is okay. I have to agree that the non-emergency classification seems odd. This should warrant a proper investigation and steps to avoid this in the future.

> Plant officials today confirmed the worker sustained minor injuries from the fall and has already returned to work. - https://www.mlive.com/news/2025/10/michigan-nuclear-plant-wo...

They returned to work the next day with minor injuries due to the fall. It doesn't sound like it was an emergency to me.

Re: A worker fell into a nuclear reactor pool

#369
post #229

Earlier quoted context omitted.

dunno if the life vest bit comment of yours was sarcastic, but it is a funny remark for sure :-) it sounds like "guy felt down in a volcano, but fortunately, he had a life vest"

it's actually important - close to the surface, the radiation should be mostly all filtered out by the water already. the deeper you get, the worse for you. I assume the first second was critical.

to make this point extra extra explicit: a life vest is also a "stay very close to the surface" vest. It prevents the worker going down like when you jump into a pool.

The usual reason for this is it keeps your mouth from being far from the air. In this case it also helps because the radioactive stuff is close to the bottom. And exposure depends on distance from the bottom.

Re: A worker fell into a nuclear reactor pool

#370

Man in Michigan potentially exposed to radiation levels equivalent to undergoing 4 x-rays at the doctors office. Meanwhile, in Texas, 1.5 people die every day working in Oil and Gas extraction. A few people die every year installing or falling off of wind turbines. But by all means, let's make this a news story instead and keep making nuclear sound scary. I’m sure the person who posted this to HN with this clickbait…

This is enlightening chart. Only Solar beats nuclear in deaths/Wh of energy. Even wind power results in more deaths. Additionally this uses very pessimistic numbers for large nuclear incidents and doesn't count thinks like deaths and health complications due to pollution and emitted radiation from fossil-fuel power sources (which emit way more radiation than nuclear power).

https://ourworldindata.org/grapher/death-rates-from-energy-p...

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