What Is the Minimum Lethal Dose of Radiation for Humans?

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Discussion Overview

The discussion revolves around the minimum lethal dose of radiation for humans, exploring the thresholds of radiation exposure that could lead to death. The scope includes theoretical considerations of radiation poisoning and comparisons with other extreme conditions affecting human survival.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions the clarity of the original question regarding lethal temperatures, suggesting that specifics such as duration, medium (air or water), and the subject's characteristics are crucial for a meaningful answer.
  • Another participant highlights that prolonged exposure to high humidity and temperature can lead to death due to overheating, providing an example of sauna fatalities.
  • A later post introduces the topic of radiation exposure, asking about the levels of whole body radiation that would be lethal.
  • One participant references a Wikipedia article, stating that the LD 50/30 dose is between 3-4 Sv and the LD 100/7 dose ranges from 10-50 Sv, providing context with comparisons to typical radiation exposure from various activities.

Areas of Agreement / Disagreement

Participants generally agree that specific conditions and contexts are necessary to assess lethal doses, but there is no consensus on the exact thresholds for temperatures or radiation exposure that would lead to death.

Contextual Notes

The discussion lacks detailed definitions of terms like "lethal dose" and does not resolve the complexities of individual variability in response to extreme conditions.

bioquest
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What are the miminum temperatures that any part of your body would have to be exposed to in order for you to definetly, 100% chance freeze or burn to death?/die as a result of?
 
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For how long?
Temperatue of what? Air? Water?
How much of their body?
Who is the subject? What is their mass? Medical history?

People have been exposed to -200C temperatures and lived - if it was just their hand and just for a few seconds.

C'mon - there is absolutely no way to answer this question without a great deal more input.
 
You need to rephrase your question.

You will die from prolonged unprotected exposure to ~110F at 100% RH because your core temp will rise due to the fact that sweating does not cool the skin, for example. People die in saunas or steam baths like this all the time. They stay too long, overheat and die.

What exactly are you after?

Anybody can come up with:
burn to death: unprotected whole body @5000F for 30 seconds
freeze solid: unprotected whole body @-450F for 30 seconds


You could have your hand in 5000F for 30 seconds and still survive - minus a hand. It would cauterize. Ditto hand in liquid nitrogen for 30 seconds. If you contained bleeding after your hand cracked off.
 
What level of whole body radiation exposure/poisioning will kill you?
 

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