Preferences

I appreciate this is supposed to be educational, but I have to wonder something regarding this point:

> The radiation exposure from consuming a banana is approximately 1% of the average daily exposure to radiation, which is 100 banana equivalent doses (BED).

If your scale starts at 100, maybe it’s not such a great educational example.

If the Average Daily Exposure (ADE) is 100 BED, the number inflates in a way that make the values seem unnecessarily high.

It’s implicitly a kind of “appeal to nature” argument, but already eating 100 bananas is completely unrealistic, and that’s just background radiation.

The article goes on to say:

> The maximum permitted radiation leakage for a nuclear power plant is equivalent to 2,500 BED (250 μSv) per year

I really don’t think this is helpful, because first of all nobody eats 2,500 bananas and it doesn’t say anything about safety, and secondly we now know that this is the same thing as 25 ADE, which both sounds less and gives a better relative comparison to how small the amount is.


The intent here is not to show how harmful eating a banana is but instead showing how harmless living nearby a nuclear powerplant.

If eating one banana only is comparable to living 50km from a nuclear powerplant for one entire year, then clearly the radiation you get from the powerplant is ridiculously small.

That fact that all this is only 1% of the radiation dose you'd otherwise get due to background radiation should only help bringing the point home.

Mostly it is an example of failing at science communication, as highlighting the radioactivity of a banana basically just serves to make bananas seem more scary. Because radioactivity is scary: it can lethally damage without you feeling anything before your start puking.

Saying living next to a reactor is safe because even bananas contains a bit of radioactivity is somewhat like saying living next to a Ebola lab is safe because there are viruses in bananas... it's not really speaking to the fear of getting caught up in the fallout when bad things happen at the reactor.

Fruit are scary! The brits used to give lessons (1970's) on defending yourself against a variety of fruit attacks, here is a clip (https://youtu.be/MlroOdP8p2Y)
> speaking to the fear of getting caught up in the fallout when bad things happen at the reactor.

The comparison focuses on the normal amount of background radiation from living near a nuclear plant, so fear of fallout "when bad things happen" is a separate issue and irrelevant to the banana example. The Ebola lab comparison is a good one though.

yeah, as always it really depends who are you communicating something to
Unfortunately this 'explanation' turned meme has had unintended consequences. I've seen this used by the uninformed online as a counter argument to dismiss legitimately dangerous sources of radiation on more than one occasion, likening radiation exposure to just being around a large amount of bananas. Sometimes only partially understanding something can be worse than not understanding it at all, especially when someone confidently misunderstands it.
In the exact example you provide I agree that “bananas for scale” can make sense, but I still claim that it scales very badly when talking about larger amounts of radiation.
But the whole point is to discuss small amounts of radiation.
So you’re saying “The maximum permitted radiation leakage for a nuclear power plant” in my example is not a small amount?
It's pretty small, but it's not bananas small. The maximum plausible exposure a person could expect to encounter from a nuclear plant leaking that maximum amount of radiation is.
Before jumping straight to high BED scenarios, are there any banana standards? BED would appear to dependant on banana size and type, which isn’t defined as far as I can see.

Is the EU standard banana a worthy banana for BED calculation?

https://en.m.wikipedia.org/wiki/Commission_Regulation_(EC)_N....

Half of the probability mass is below the average in a normal distribution so, yeah, it makes sense for the average to sit at a nonzero and nonunit number. The fact that it's a nice and neat number like 100 is interesting. That's about one box of bananas.

Maybe someday the banana industry will address your concerns by making the fruit more radioactive.

i think it makes sense as a way to show the safety of nuclear power plants, considering measures of amounts of radiation can sound scary to someone who's unfamiliar with them

This item has no comments currently.

Keyboard Shortcuts

Story Lists

j
Next story
k
Previous story
Shift+j
Last story
Shift+k
First story
o Enter
Go to story URL
c
Go to comments
u
Go to author

Navigation

Shift+t
Go to top stories
Shift+n
Go to new stories
Shift+b
Go to best stories
Shift+a
Go to Ask HN
Shift+s
Go to Show HN

Miscellaneous

?
Show this modal