patrick.net

LOL, TBS and NHK have stopped streaming on ustream now.

Great. I was mainlining that for a week. Now I'm going to go into info withdrawal.

I should just work on my stuff and ignore this I guess.

Troy says

LOL, TBS and NHK have stopped streaming on ustream now.
Great. I was mainlining that for a week. Now I’m going to go into info withdrawal.
I should just work on my stuff and ignore this I guess.

That's not a good sign...

Troy says

I don’t give a shit about microsieverts but I do care not to get radioactive shit in my lungs or ingest them and have them migrate into my muscle tissue, since radioactive crap INSIDE your body works on the microscopic scale, and all this microsievert crap is talking about macro scale.

EXACTLY. Cancer risk goes up with increased exposure to radiation, period. And if these tiny particulate amounts we're getting hit with now continue to accumulate, so will the long-term risks. But by the time those risk-related problems manifest they will belong to another set of politicians...

Troy says

All it takes is spent fuel rods to start smoking and the wind to blow to the SW. They say Tokyo is too far but that’s bullshit.

According to this Austrian website that may happen by Sunday (GMT?). If the winds continue, the whole of the country could get a nasty dusting afterwards.

http://www.zamg.ac.at/aktuell/index.php?seite=1&artikel=ZAMG_2011-03-18GMT09:52

simchaland says

Troy says

LOL, TBS and NHK have stopped streaming on ustream now.

Great. I was mainlining that for a week. Now I’m going to go into info withdrawal.

I should just work on my stuff and ignore this I guess.

That’s not a good sign…

Oh yeah... isn't it Saturday morning in Japan? Prime time for getting repairs done. I thought they were reconnecting the power today...

simchaland says

Do I think we can do anything to “get out of the way” if the stuff that actually makes it here is horribly harmful to us? No. I don’t. I’d at least like to know the truth so that I’d know how to take care of myself as best as I can under the circumstances. I don’t think that the people of Japan are getting enough truthful information to take care of themselves and I highly doubt that if this ends up being serious for us that we will get enough information to actually take care of ourselves well.

Agreed. Although being east of the Rockies might help psychologically.

terriDeaner says

I thought they were reconnecting the power today…

What they're reconnecting power TO remains to be determined.

Power is good in that you can deploy replacement stuff, but I was watching on Japanese TV some author guy who wrote anti-nuke books in the 80s go on about how everything's completely fucked in the plants now --eg. they've been evaporating sea water in them for a week now, every unit has had a hydrogen explosion, not to mention they admit all three active reactors have had core damage due to losing coolant due to inability to circulate new coolant.

Here's the guy:

http://www.youtube.com/watch?v=37sStCJjH14#t=1m50s

"you can't just throw water on it, you've got to circulate water through it"

"those college guys on TV don't know anything, only the engineers do"

I really hope this guy is a paid shill for the oil industry and not telling the truth . . .

simchaland says

That’s not a good sign…

Actually I guess it's because TBS and NHK-G went back to their regular programming.

Live NHK-G programming will be streamed 6PM - 8PM, 8:45PM - 11PM JST

I was really getting into TBS' News Bird, I thought it was a dedicated internet channel, but guess not.

HOTT

Troy says

I was really getting into TBS’ News Bird, I thought it was a dedicated internet channel, but guess not.

Helps to have something to take your mind off this mess!

Chief Cabinet Secretary now announcing spinach and milk from Fukushima and Ibaraki failing radiation limits.

Tries to spin it that if you eat it for your life you only get one cat scan worth of radiation.

Problem with this is gamma radiation obeys the inverse square law so a cesium 137 atom attached to a potassium receptor in your body that turns itself into Barium and then pops off a gamma ray is zillions times stronger than a cat scan.

When asked about WSJ report about slow response to crisis, he said yes it can be said there have been mistakes, but now we've got to focus 100% on now. I agree with that, even though BP should have been educational maybe.

Press conference with the Tokyo Hyper Rescue team leader that got the pump truck and ladder truck connected and throwing tons of water into Unit 3.

They had difficulty finding a good spot to put the pump truck near the ocean with all the tsunami damage. They had to run 800m of hose back to the ladder truck. It took 40 people with like 3 vehicles to get it all set up.

The leader broke down when asked about the most difficult part -- he thought about it and said 'taiin' -- 'my men'. Everyone on twitter is just really moved by that.

Team members had a limit of 30 mSv of radiation in this operation, and one member hit 27 mSv.

Anyway, they're going to run the trucks unmanned for 7+ hours to get 2000 tons of water into the pool.

This pool has 3328 new MOX fuel rods -- 6% plutonium -- that the authorities do not want to get any hotter than they are now.

If this is where the corner is turned this is going to make a great disaster movie.

@Troy

You know a lot about nuclear physics...
I majored in at for a time at university, so I understand what you are talking about anyway. I thought it was one of the toughest majors there. The gamma radiation is strong and penetrates more than alpha and beta particles can- even externally.

I may be able to find some NHK stuff for you.

The president of TEPCO hasn't been seen for a long time. Probably some worthless 天くだり "amakudari" guy.

I wonder if lots of the soy milk comes from Ibaraki too. I've been getting that.

If anyone interested here is website that is not government operated that displayes radiation levels: http://www.blackcatsystems.com/RadMap/map.html
If anyone know of other independent sources please share.

Troy says

Chief Cabinet Secretary now announcing spinach and milk from Fukushima and Ibaraki failing radiation limits.

Tries to spin it that if you eat it for your life you only get one cat scan worth of radiation.

I still can't believe that the govn't agencies are so cavalier about this. It's like they don't understand the difference between a THEORETICAL acute dose of radiation while the food passes through a person, and the ACTUAL case where ingested radioactive isotopes are absorbed, processed and accumulated by the body, leading to increased risk of cancer later in life. Or they simply want to ignore the inconvenient latter case.

From bbc asia-pacific:

1211: The UN nuclear watchdog the IAEA says Japan has ordered a halt to all sales of food products from Fukushima prefecture, Reuters reports. It comes after the chief cabinet secretary Yukio Edano said radiation levels in milk and spinach from the region of Fukushima nuclear plant exceeded safety standards - though the radiation levels recorded still pose no serious risk to human health.

So why the fuck have the safety standards and a food sale stoppage in the first place if they "pose no serious risk to human health"? It seems like the Japanese government is talking out of both sides of its mouth at the same time. They could be MUCH more explicit about what type of contamination has occurred, at least...

and:

1646: Officials are keen to put the amount of radiation present in tap water in perspective. Drinking one litre of watre with iodine at Thursday's levels [when levels were highest] is the equivalent of receiving 1/88th of the radiation from a chest x-ray, Kazuma Yokota, a spokesman for the Fukushima prefecture disaster response is quoted by the Associated Press news agency as saying.

1300: More on that IAEA statement confirming the presence of radioactive iodine in food products from Fukushima prefecture. The statement says: "There is a short-term risk to human health if radioactive iodine in food is absorbed into the human body... Children and young people are particularly at risk of thyroid damage." But the IAEA stresses that radioactive iodine decays naturally within a matter of weeks, and the Japanese authorities have taken steps to counter any risks. You can find more here.

What fucking spin is this??? Iodine is preferentially absorbed and concentrated in the thyroid even when present in low amounts in food and water. This is why iodine can be supplemented in very small amounts in salt, but provide a useful source for normal metabolism. And what about the milk cows that have been drinking this water all week?

Part of the reason that I-131 is dangerous in the short term is because it has such a short half-life... once it is concentrated in the thyroid, it cooks it with intense beta and gamma radiation from rapid radioactive decay. And why is there no mention of the LONG-TERM elevated risk of thyroid cancer??? This is a serious concern for exposed children!

American in Japan says

I wonder if lots of the soy milk comes from Ibaraki too. I’ve been getting that.

Soy milk *may* be safer since it is coming from a lower level of the food chain, and since the beans have grown to maturity mostly in the absence of radioactivity. I guess it depends on how well the contamination has been cleaned off the crops and the processing machinery.

simchaland,

Yup, I guess you have to take what media says or government says
with a grain of salt. I see media as the boy in the "boy who cried wolf."
I am one of those who is tired of their sensationalism and their tendency
to stir mass hysteria. But you know it sells.

Sure, less and infrequent information can strike fear. But I am not sure
if we would even get new news every hour in the situation like this.
I would be skeptical if there is a new development every hour or so. On the
note, the radiation level went down at the plant.

I hope that would be the end of this. For your info. when you fly from Los Angeles
to Tokyo, you will be exposed to 5.5mrem (55uSv), so whatever we get from Japan
which is 5000 miles away will have no impact at all.

You can always buy a Geiger counter, if you are so concerned. By the way,
the radiation you get from Japan is so minute, a Geiger counter won't even detect
it. You need to sample the air for the sign of radioisotope like, Xe or He. I doubt
iodine or cesium radioisotope will actually get to US or even Hawaii.
Especially now the reactors seem to be under control.

Nobody says

On the note, the radiation level went down at the plant.

Minimally, and what TEPCO's measuring and releasing reports on is not the important thing.

For a while they were just releasing the dosage at the west gate, with the wind BLOWING FROM THE WEST.

Now at least they're doing a somewhat better job of releasing data, but the data they are releasing is still hand-picked.

Nobody AFAIK asked what the dosage is on the road in front of the reactors. TEPCO latest report focuses on the main office building location:

http://www.tepco.co.jp/nu/monitoring/11032006.pdf

and gives 2.6mSv/hr but this is very far from Unit 4.

when you fly from Los Angeles
to Tokyo, you will be exposed to 5.5mrem (55uSv), so whatever we get from Japan
which is 5000 miles away will have no impact at all.

Goddamit this is the bullshit that they're telling you and I for one am not buying it. This is how they've hand-waved the nuclear test era such that we don't hunt down and kill the perpetrators who poisoned the shit out of this planet, and now who today defend the 60s and 70s nukes as a minimal risk that cannot ever ever create something as bad as Chernobyl.

Ingesting radioactive Cesium is totally different from the increased dosage up in the air!

Especially now the reactors seem to be under control.

Wikipedia has a good summary now I think:

http://en.wikipedia.org/wiki/Fukushima_I_nuclear_accidents#Reactor_status_summary

5 & 6 apparently were never in great danger as they were off and didn't have the energy to overwhelm the cooling system (plus they were able to get one diesel generator working, powering the low-pressure pumps).

1 & 2 have suffered explosions and whatnot but the seawater injection has maintained some degree of control.

3 has had a bad time, with a real doozy of a hydrogen explosion. Complicating matters is the 52 new assemblies of MOX in the spent fuel pool. Each assembly has 18kg of Plutonium, probably a critical mass.

I think this is why the PTB focused on getting 3 out of trouble before tackling 4, plus given the rather constrained layout of the plant, to get to 4 you have to go by 3, and one does not casually saunter by a a building with 100 tonnes of reactor grade uranium and plutonium open to the sky ~80' above street-level.

Building 4 is the wildcard now. According to this report, there's 1535 assemblies in the spent fuel pool, including 548 that were pulled out of service late last year (and are still HOT). Total capacity of the pool is 1590, so you can see that they really loaded this reactor unit up with material -- 276 TONNES of uranium and 158 tonnes of Zircaloy, which auto-catalyzes when heated past 900 deg when oxygen is present.

Perhaps the Zircaloy is burned off already, or not, the Nuclear Safety spokesperson has been completely evasive about the state of Unit 4's spent fuel pool in the press conferences I've seen.

At any rate Unit 4 looks like it has gone through a war already, even without any reported explosions.

Wikipedia says Unit 4's spent pool is outputting heat at a 2 MW rate, the output of a ~3000HP diesel generator.

I don't know what's left to burn in the spent fuel pool, and what's going to happen to all that fuel, but it's not quite time yet to be saying things are "under control".

"I don’t know what’s left to burn in the spent fuel pool, and what’s going to happen to all that fuel, but it’s not quite time yet to be saying things are “under control”."

Translated to: " I have no idea what it means, therefore it surely can't be under control!"

Maybe what they're saying is it IS under control, and that is exactly what it should be doing.

But that wouldn't be dooms day enough for you though.

Nomograph says

pkennedy says

But that wouldn’t be dooms day enough for you though.

I think Troy used to live in Japan so perhaps he has more of a vested interest.
Terrideaner is just spreading histrionic paranoia.
Let other pens dwell on guilt and misery — Jane Austen

Did your shrink recommend that you handle information that threatens you this way?

And does the unpredictable, unknowable nature of the real world frighten you so much that you have to try so hard to disparage the topic of this thread?

"A foolish consistency is the hobgoblin of small minds" - Emerson

According to Wunderground.com, gusts of wind are blowing from the SE to the NW. (Away from Tokyo, but keeping it in Fukushima or Miyagi Prefectures now.)

My wife said the president of TEPCO was crying and apologizing on NHK yesterday. Did you see it, Troy? You are watching NHK even more than I am. (too busy checking multiple sources).

I read about that. And now they are reporting that radiation and fission isotopes have been found in milk and spinach from Fukushima Prefecture. Soon the horrible truth will be impossible to hide. He'll cry even more and maybe fall on his sword.

They've finally admitted that enough has been released that citizens near the plant will die.

pkennedy says

Translated to: ” I have no idea what it means, therefore it surely can’t be under control!”

I've been following this situation in the Japanese for hours every day. I understand it more than anyone (other than experts), and the experts differ about what's going to happen with Unit 4, eg "arclight" has said Kaku is wrong about being able to entomb the reactors immediately.

LA Times quotes chairman of NRC saying Unit 4 pool is empty, says there may be a breach, and quotes anti-nuke guy with UCS as there may be no solution.

http://articles.latimes.com/2011/mar/18/world/la-fg-japan-quake-wrapup-20110318

Pro-nuke guys are still saying there's no problem, there has not been a problem, death toll so far is microscopic compared to the tsunami up north, and coal pollutes more so don't worry we have this under control.

Here's a pic of Unit 4. The storage pool is in the upper left of what remains of this building. I can see why the chairman of the NRC said his information is that the storage pool is empty.

Here's what the Chief Cabinet Secretary last said about 3 and 4:

"There is immediate threat of radioactive nuclides release from the spent fuel pools of Unit 3 and 4, because of incapability of cooling these pools"

http://www.jaif.or.jp/english/news_images/pdf/ENGNEWS01_1300590001P.pdf

Complicating matters is that NHK is now reporting on the news that Unit 3's reactor vessel pressure is rising. They may need to vent that, and if they do they'll be venting who-knows-what since unit 3 has been running with the core only partially immersed for days.

Apparently the working environment now in front of units 3 and 4 is not as bad as Chernobyl. That was my main fear going into this week, that we would lose the ability to intervene (unless we got some robots in there).

What I don't know is what's going to happen with Unit 4. The experts differ about what will happen to the 276 tonnes of spent fuel as it continues to heat up. TEPCO has said recriticality is not off the table.

The storage pools in Fukushima had been re-racked:

Measures for increasing Storage Capacity

- Increase in the capacity of spent fuel pools by re-racking

http://www.nirs.org/reactorwatch/accidents/6-1_powerpoint.pdf

I don't know what's left to burn in Unit 4. Maybe the tonnes of fuel with its 2MW output will find a happy place and just cool down without venting or breaching the pool.

Whatever, the situation in Unit 4 and perhaps Unit 3 is not "under control" at the moment.

#3 and #4 both remain nasty question marks. And, as Troy pointed out earlier, the corroded pumps washed with seawater may or may not work when power is restored. I sincerely hope they will, but I have some doubts... but all is well, right???

From bbc asia-pacific:

2240: American investigative journalist and Japanese crime expert Jake Adelstein writes in his blog that: "the Japanese police are quietly beginning an investigation into TEPCO, the managing entity of the Fukushima Nuclear Reactor for charges of professional negligence resulting in death or injury." He says the investigation is still in its early stages and that nothing is official yet.

terriDeaner says

the corroded pumps washed with seawater may or may not work when power is restored

The pumps may not EXIST now.

http://www.youtube.com/watch?v=T_N-wNFSGyQ

Just saw this on twitter feed on the NHK steam:

圧力さげないと「ただちに」言えなくなる

Here's your Japanese lesson for today:

圧 -- 'atsu' -- 'pressure'. This is the same root in 'shiatsu' -- 'finger pressure'
力 -- 'ryoku' -- 'strength'
さげ -- verb stem of the transitive verb 'to lower'
ない -- negatory verb ending conjugation
と -- grammatical particle meaning 'upon/unless'
「 ただちに」 -- "for now"
言え -- verb stem of the potential form of 'say'
なく -- connective conjugation of negatory verb ending
なる -- 'become'

"unless the pressure is lowered 'for now' won't be able to be said" [when referring to radiation not being harmful]

The joke is if they don't bleed the primary containment, 50 tons of plutonium is going to be violently ejected all over the site via steam explosion.

Troy says

The pumps may not EXIST now.

http://www.youtube.com/watch?v=T_N-wNFSGyQ

Fuck. And it is pretty creepy at the end of that clip when the talking head is clearly scared shitless by the feed.

Troy says

The joke is if they don’t bleed the primary containment, 50 tons of plutonium is going to be violently ejected all over the site via steam explosion.

Not good. Any way this can be remedied remotely?

By the way, thanks for keeping up with the Japanese language websites and communicating them here. Much appreciated.

The latest on the death count is over 8,000 with over 12,000 more missing. At least 16-17,000 have actually perished, I assume.
Winds are blowing into Japan (Fukushima and Miyagi) but away from Tokyo. So far only on Tuesday have the winds really blown towards Tokyo. Tomorrow long rains are coming to Tokyo and Fukushima.

Other Japanese words in Chinese Characters/hiragana:

東京都 Tokyo city
福島県 Fukushima-ken
放射 radiation
核発電所 Nuclear power plant

American in Japan says

At least 16-17,000 have actually perished, I assume.

Yeah, when I saw the devastation of Rikuzentakata I told my mom the death toll was going to be at least 20,000.

Before then I thought this wasn't going to be too bad, but a wave that wipes out coast cities like an a-bomb is going to be a mass-casuality thing. Only thanks to the the several massive tsunamis in living memory probably will the death toll be under 100,000.

I know if I had been in fishing village I'd have felt perfectly safe on the third floor of a solid building.

May there be justice:

http://www.japantoday.com/category/commentary/view/bungling-cover-ups-define-tepco#show_all_comments

@Troy

"Only thanks to the the several massive tsunamis in living memory probably will the death toll be under 100,000."

As bad as it was, it could have been much worse. People were warned about the Tsunami ahead of time, so many moved up/inland.

It appears that one had to go much farther inland in many place, than with Phuket (I was there last summer). With Phuket people said that about 250m inland was enough.

Rain tomorrow for Tokyo and Fukushima. I don't want to be in that...

Another fairly good site:

http://japanearthquake.org/

Troy says

when you fly from Los Angeles
to Tokyo, you will be exposed to 5.5mrem (55uSv), so whatever we get from Japan
which is 5000 miles away will have no impact at all.

Goddamit this is the bullshit that they’re telling you and I for one am not buying it. This is how they’ve hand-waved the nuclear test era such that we don’t hunt down and kill the perpetrators who poisoned the shit out of this planet, and now who today defend the 60s and 70s nukes as a minimal risk that cannot ever ever create something as bad as Chernobyl.

Ingesting radioactive Cesium is totally different from the increased dosage up in the air!

You and terrideanner need to get a grip. There are thousands of people dead, millions in very serious danger of exposure, disease, and nuclear contamination. All you two can whine about is the one in a qaudrillion chance you may ingest a stray isotope from japan (as opposed to the billions of stray isotopes that float around the world already and you ingest all the time) that will have zero chance of increasing your risk of cancer. Unless you live in a lead lined room with a 99.9999% air filter puration system 24/7 you are getting radiation exposure every single day both externally and from ingestion of radioactive isotopes. Worry about real dangers like a car accident or falling in your bathtub. You guys must be lots of fun at parties.

bob2356 says

You and terrideanner need to get a grip. There are thousands of people dead, millions in very serious danger of exposure, disease, and nuclear contamination.

Responses like this lead me to believe that you have a reading comprehension problem. Please go back, and slowly read over some of the earlier entries... this time with your reading glasses on. Try not to just selectively leave out the parts that aren't convenient for your narrative.

I am concerned for all of the people affected by the earthquake/tsunami/nuclear crisis. The effects on the Japanese people have been horrific and very sad. But you need to understand that this crisis will have global effects, it is that simple. To what degree these effects are felt here are of great interest to me. If you don't care, then simply continue to ignore the information you don't like.

bob2356 says

All you two can whine about is the one in a qaudrillion chance you may ingest a stray isotope from japan (as opposed to the billions of stray isotopes that float around the world already and you ingest all the time) that will have zero chance of increasing your risk of cancer.

Interesting estimates. Care to supply a source for these calculations?

bob2356 says

All you two can whine about is the one in a qaudrillion chance you may ingest a stray isotope from japan (as opposed to the billions of stray isotopes that float around the world already and you ingest all the time) that will have zero chance of increasing your risk of cancer.

You'll note that I haven't said a goddamn thing about dosing of the West Coast.

I'm only concerned about Japan, partially since I had plans semi-set to go back there later this decade, and the ongoing effects is an interesting academic exercise.

This is 4 reactors 'spitting the dummy' at once. I've read that Chernobyl's reactor core only had been in operation for 3 months, meaning the level of contaminants in its fallout was a lot less than what the current 3 reactors and 4 storage pools under stress contain.

The 3 scrammed reactors are still in the megawatt range WRT output and will be for months. They've been injecting seawater via the fire suppression pumps for days now, but either this seawater is evaporating in the reaction chamber -- leaving tons of radioactive salt behind, eventually gumming up everything -- or it is being dumped into the environment. Normally this would be just a "Bad Thing" (moderate contamination) but since all 3 cores lost cooling for hours it is quite likely primary containment -- the fuel rod cladding -- is compromised and this sea water is a contaminated with high levels of nuclear crap, including cesium and plutonium.

They've already said Unit 2's suppression containment is compromised, and anyone looking at Unit 3's explosion:

http://www.youtube.com/watch?v=T_N-wNFSGyQ

and resulting ruins of the facility:

might easily come to the conclusion that Unit 3's steam suppression torus is also compromised in integrity and/or functionality.

TEPCO has done a good job updating us with the microsievert level radiation leakage at the "West Gate" monitoring point, but has said absolute BUPKUS about what they're dumping into the ocean now, and none of the idiot reporters have been covering this.

Since Unit 4's storage pool was stacked to the full with 1535 fuel assemblies (including ~500 pulled out of service late last year) it is still outputting 2MW and will continue to do so for a great while.

I don't know what's going to happen from here. I half-expect things will get better from now on.

But I just don't know if & how the residual heat is going to be safely contained to avoid the creation of a continuous plume irradiating half of Japan over the next few months.

At any rate I do have hope that whatever challenges we still face we can meet them.

One problem is that the PTB's decision cycle has been rather slow. NHK is reporting this morning that they are only now sending an NBC-protected bulldozer:

that will start work clearing out the debris from the tsunami and last week's explosions. This is not very on-the-ball disaster management.

They're also bringing in two concrete tower-cranes today, too.

Troy says

I don’t know what’s going to happen from here. I half-expect things will get better from now on.

That's just it. It really does look like some stability has been achieved, and that the worst is over. However, the downside risk of having so much spent fuel around remains high.

The likely path forward at this point seems like continued bit-by-bit repairs to the remaining reactors over the next few weeks/months, with periodic releases of radioactive materials. Fortunately for all of us, we can expect far,far less radioactive pollution than if the spent fuel rods got out of control. Still, we don't know how much radioactive material will be released before this story is over. Probably (hopefully) very little on a global scale.

Now that this situation is coming under control, I hope that more foreign aid workers will be willing to go to Japan to help during the recovery period. The Japanese people have many difficult challenges facing them, and they will be compounded by dealing with ongoing contamination from the crippled plant. At a minimum, I hope this tragic experience will serve to teach the agencies responsible for public safety how to better anticipate and deal with catastrophic emergencies.

XKCD has a chart about dosages:

http://www.xkcd.com/radiation/

Vicente says

XKCD has a chart about dosages:
http://www.xkcd.com/radiation/
“Eagles are dandified vultures” - Teddy Roosevelt

Nice chart. What I'd like to see is the %increased cancer risk by radiation dose, and also a chart of %increased cancer risk versus concentration of ingested isotope (by type). I should do some digging... someone may have done these studies in a lab with mice or rats.

XKCD is just parroting the line about radiation is radiation.

For some reason most engineering types really want to defend the nuke industry to the death.

I think it's the romantic attraction to tapping the colossal forces of nature.

http://www.youtube.com/watch?v=0PfBYsII_Jw#t=34s

Troy says

For some reason most engineering types really want to defend the nuke industry to the death.

It's also easier to measure and track the immediate effects of acute doses. How could you accurately measure the increased cancer cases (in humans) due to the open-atmosphere nuke tests last century? An appropriate control group would be impossible to assemble.

I think it's more because we can GAUGE the effects of say direct exposure to radiation, and to atmospheric carried particles. How can I gauge that you'll ingest a lot of foodstuffs carrying radionuclides and what that will do to you? I can't really, far too many variables.

Vicente says

I think it’s more because we can GAUGE the effects of say direct exposure to radiation, and to atmospheric carried particles. How can I gauge that you’ll ingest a lot of foodstuffs carrying radionuclides and what that will do to you? I can’t really, far too many variables.
“Eagles are dandified vultures” - Teddy Roosevelt

Exactly my point. But real dangers of ingesting radioactive particles persist, whether they are difficult to predict or measure.