"And, you still fail to explain why enrichment changes the neutron emission of uranium."
No, you failed to comprehend the explanation. Neutron emitting natural fission events in unenriched uranium are rare. Even moreso in ore. Google it bro.
"Probably because you still think there is none, facepalm."
No, I specifically stated the neutron flux is so low as to be irrelevant from the standpoint of health physics. I never said zero Again, re-read.
"I learned plenty in physics. Clearly, you failed. Obviously not."
Yet you still fail to grasp basic concepts.
"Perhaps you want to explain to me "critical mass" and why a bunch of Uranium or Plutonium goes boom when you reach "critical mass" ?"
Critical mass is when neutron capture is high enough that fission events and the neutrons they produce are captured by other nuclei, creating additional events. This is not possible in UNENRICHED URANIUM.
You've utterly failed to understand that neutron emissions from Uranium ore are from natural fission events, which on the balance, are rare compared to alpha and beta. This, on top of Uranium's immense half life (hint: it decays quite slowly).
I'm not going to go into fast, slow and thermal neutrons, delayed vs prompt, because it will clearly sail over your head.
Fission reactors use the free neutrons emitted by the ENRICHED URANIUM. As previously mentioned, ore is not enriched and neutron emitting events are rare.
Not only are you arrogant, you're apparently illiterate as well. Read the link
Free neutrons are the result of fission events. Natural fission events are relatively rare in natural, unenriched Uranium.
"For naturally occurring thorium-232, uranium-235, and uranium-238, spontaneous fission does occur rarely, but in the vast majority of the radioactive decay of these atoms, alpha decay or beta decay occurs instead. Hence, the spontaneous fission of these isotopes is usually negligible, except in using the exact branching ratios when finding the radioactivity of a sample of these elements. "
"What the fuck would have enrichment to do wit it?"
You clearly don't understand what "enrichment" is. Uranium ore is not pure Uranium nor is it a single isotope. Enrichment refers in increasing the percentage of U-235. In natural equilibrium, PURE Uranium is 0.720% U-235. 99.274% is U-238, which is NOT fissionable.
Ore is rarely more than a few percent Uranium. Therefore, what your hubris is blinding you from seeing is in ore, the fissionable isotope of Uranium is 0.720% of 3% total Uranium.
Neutron emitting events are so minute in natural Uranium or as to be non-existent in terms of health physics. Even Plutonium is not a significant danger until sufficient quantities are present to start fission and therefore a significant free neutron flux.
"So they either got some actual nuclear waste - or someone had the Geiger counter set wrong."
It's almost assuredly the latter. Geiger-Mueller tubes cannot discriminate energy levels or the difference between alpha, beta or Gamma radiation except to use different shield materials to filter out alpha, then beta.
G-M counters are also wildly inaccurate at providing dose rates unless shielded for gamma only energy compensation. Dose rates are calculated in terms of Gamma against a known standard such as Cesium 137. Shielding to get correct Gamma dose rates precludes detecting alpha.
This is exactly why you don't want random people with insufficient knowledge and cheap, uncalibrated equipment roaming around causing hysteria.
Perhaps you should learn that fuel for bombs and nuclear reactors is enriched or highly enriched. Normal unenriched ore effectively has no chance of producing fission (neutron) events.
Knowledge is a great thing to have before calling other people "idiot".
"Just in case i wasn't positive enough about paid shilling in this thread, here comes ShanghaiBill to relieve my doubts."
Learning, knowledge and understanding are excellent tools for reliving ignorant doubts. Researching a topic is generally a much better plan than making baseless claims such as calling a person is a "shill".
Alpha particles are stopped by a few inches of air, paper, your epidermis. They're only dangerous if an emitter is lodged inside the body (lungs for example), where the alpha particles can continuously bombard sensitive tissue. This is the mechanism that killed Alexander Litvineko. Polonium-210 is a copious alpha producer (orders of magnitude worse than naturally occurring Uranium isotopes). He was deliberately poisoned with it; once in the body, it wreaked havoc.
Given the frequency their delivery contractors fail to perform the core of their job function correctly, i.e. actually deliver the package to the correct address undamaged and on time, they hardly qualify as carbon based life-forms.
Bravo for getting a head start on carbon reductions, Amazon!
"You must not know much about what goes into a modern electronics product. The phones and tablets and laptops being sold today are too small for off-the-shelf fasteners to be used. I make Nixie tube wristwatches in the USA, and I use the smallest American screw I can get to hold them together. That screw is about twice as big as the average screw in a modern phone."
I've often wondered if some people find comfort in making baseless assumptions; it would explain quite a bit.
The given example was that Apple couldn't build an American PC for want of a custom screw. The problem is easy to avoid; engineer it so you don't need that special screw. I suspect companies get in this position when they focus on creating sexy anodized aluminum trashcans instead of functionality.
Never the less, they could still source Chinese screws, a low cost item and claim "Made in America". Products do not have to contain 100% American parts to claim this - that's (partially) why we have Hondas that are "Made in America" and Chryslers that aren't
If only it was possible to engineer a product using readily available parts instead of custom items specifically designed to stifle repairs and create vendor lock-in....if only it was possible...
Petition Facebook to reveal who it has sold users data to. Petition Facebook to give the user control over what data is collected Petition Facebook to be far more transparent about its moderation Petition Facebook to take community feedback about it's standards Petition Facebook to promote free speech...
Regardless if he was a licensed PE, a practicing engineer or a fry cook, if his measurements and conclusions were valid and repeatable, his voice should be heard. It's highly likely the only reason he was using his "Engineer" title was to lend credence to his fact finding and problem solving skills. I.E. to get the attention of dismissive bureaucrats.
It's pretty good at cracking down on its own people too. Monitoring them, limiting their freedom of speech,rating them according to social media status, making them disappear...
Slashdot Mirror
You just demonstrated that 77.8769% of all statistics are made up on the spot.
You've got it backwards - it's the 3% fringe that are the problem.
A tool to stifle comments comments that are contrary to their agenda as well as an excuse to snarf up 100% of the profits for other people's work.
"And, you still fail to explain why enrichment changes the neutron emission of uranium."
No, you failed to comprehend the explanation. Neutron emitting natural fission events in unenriched uranium are rare. Even moreso in ore. Google it bro.
"Probably because you still think there is none, facepalm."
No, I specifically stated the neutron flux is so low as to be irrelevant from the standpoint of health physics. I never said zero Again, re-read.
"I learned plenty in physics. Clearly, you failed.
Obviously not."
Yet you still fail to grasp basic concepts.
"Perhaps you want to explain to me "critical mass" and why a bunch of Uranium or Plutonium goes boom when you reach "critical mass" ?"
Critical mass is when neutron capture is high enough that fission events and the neutrons they produce are captured by other nuclei, creating additional events. This is not possible in UNENRICHED URANIUM.
You've utterly failed to understand that neutron emissions from Uranium ore are from natural fission events, which on the balance, are rare compared to alpha and beta. This, on top of Uranium's immense half life (hint: it decays quite slowly).
I'm not going to go into fast, slow and thermal neutrons, delayed vs prompt, because it will clearly sail over your head.
Enjoy the hubris.
Fission reactors use the free neutrons emitted by the ENRICHED URANIUM. As previously mentioned, ore is not enriched and neutron emitting events are rare.
Not only are you arrogant, you're apparently illiterate as well. Read the link
Free neutrons are the result of fission events. Natural fission events are relatively rare in natural, unenriched Uranium.
"For naturally occurring thorium-232, uranium-235, and uranium-238, spontaneous fission does occur rarely, but in the vast majority of the radioactive decay of these atoms, alpha decay or beta decay occurs instead. Hence, the spontaneous fission of these isotopes is usually negligible, except in using the exact branching ratios when finding the radioactivity of a sample of these elements. "
https://en.wikipedia.org/wiki/...
Stop embarrassing yourself...
"What the fuck would have enrichment to do wit it?"
You clearly don't understand what "enrichment" is. Uranium ore is not pure Uranium nor is it a single isotope. Enrichment refers in increasing the percentage of U-235. In natural equilibrium, PURE Uranium is 0.720% U-235. 99.274% is U-238, which is NOT fissionable.
Ore is rarely more than a few percent Uranium. Therefore, what your hubris is blinding you from seeing is in ore, the fissionable isotope of Uranium is 0.720% of 3% total Uranium.
Neutron emitting events are so minute in natural Uranium or as to be non-existent in terms of health physics. Even Plutonium is not a significant danger until sufficient quantities are present to start fission and therefore a significant free neutron flux.
I learned plenty in physics. Clearly, you failed.
"So they either got some actual nuclear waste - or someone had the Geiger counter set wrong."
It's almost assuredly the latter. Geiger-Mueller tubes cannot discriminate energy levels or the difference between alpha, beta or Gamma radiation except to use different shield materials to filter out alpha, then beta.
G-M counters are also wildly inaccurate at providing dose rates unless shielded for gamma only energy compensation. Dose rates are calculated in terms of Gamma against a known standard such as Cesium 137. Shielding to get correct Gamma dose rates precludes detecting alpha.
This is exactly why you don't want random people with insufficient knowledge and cheap, uncalibrated equipment roaming around causing hysteria.
Perhaps you should learn that fuel for bombs and nuclear reactors is enriched or highly enriched. Normal unenriched ore effectively has no chance of producing fission (neutron) events.
Knowledge is a great thing to have before calling other people "idiot".
"Just in case i wasn't positive enough about paid shilling in this thread, here comes ShanghaiBill to relieve my doubts."
Learning, knowledge and understanding are excellent tools for reliving ignorant doubts. Researching a topic is generally a much better plan than making baseless claims such as calling a person is a "shill".
Alpha particles are stopped by a few inches of air, paper, your epidermis. They're only dangerous if an emitter is lodged inside the body (lungs for example), where the alpha particles can continuously bombard sensitive tissue. This is the mechanism that killed Alexander Litvineko. Polonium-210 is a copious alpha producer (orders of magnitude worse than naturally occurring Uranium isotopes). He was deliberately poisoned with it; once in the body, it wreaked havoc.
Given the frequency their delivery contractors fail to perform the core of their job function correctly, i.e. actually deliver the package to the correct address undamaged and on time, they hardly qualify as carbon based life-forms.
Bravo for getting a head start on carbon reductions, Amazon!
The average smartphone uses 268 milliwatts at idle, screen off. 40 microwatts is hardly worth it.
"You must not know much about what goes into a modern electronics product. The phones and tablets and laptops being sold today are too small for off-the-shelf fasteners to be used. I make Nixie tube wristwatches in the USA, and I use the smallest American screw I can get to hold them together. That screw is about twice as big as the average screw in a modern phone."
I've often wondered if some people find comfort in making baseless assumptions; it would explain quite a bit.
The given example was that Apple couldn't build an American PC for want of a custom screw. The problem is easy to avoid; engineer it so you don't need that special screw. I suspect companies get in this position when they focus on creating sexy anodized aluminum trashcans instead of functionality.
Never the less, they could still source Chinese screws, a low cost item and claim "Made in America". Products do not have to contain 100% American parts to claim this - that's (partially) why we have Hondas that are "Made in America" and Chryslers that aren't
If only it was possible to engineer a product using readily available parts instead of custom items specifically designed to stifle repairs and create vendor lock-in. ...if only it was possible...
So long as it's use to:
Petition Facebook to reveal who it has sold users data to.
Petition Facebook to give the user control over what data is collected
Petition Facebook to be far more transparent about its moderation
Petition Facebook to take community feedback about it's standards
Petition Facebook to promote free speech...
"Citation: religious societies survived the evolutionary selection process. Non-religious did not."
A) That's not how citations work
B) What is your evidence for this?
Yeah, it's only the "right wing" that oversimplifies things.
Careful, your bias might be showing.
Too bad it was utterly impossible to predict this would happen...
When will it and Chrome join the ranks of operating systems that run Android applications *well*?
Regardless if he was a licensed PE, a practicing engineer or a fry cook, if his measurements and conclusions were valid and repeatable, his voice should be heard. It's highly likely the only reason he was using his "Engineer" title was to lend credence to his fact finding and problem solving skills. I.E. to get the attention of dismissive bureaucrats.
..because it's the BBC...
"why would you disable touch ID?"
Because you can be legally compelled to unlock your phone with a fingerprint. Not with a passcode.
It's pretty good at cracking down on its own people too. Monitoring them, limiting their freedom of speech,rating them according to social media status, making them disappear...
They must party like it's 1899 over there...
I can't believe nobody thought of edge computing before!
Remember, if the service is free, YOU are the product.