KitemanSA wrote:
Really? There have been THOUSANDS of scientists looking to enrich NICKEL? Really? Why?
Obviously enriching 235UF6 which is ~ 0.8% different in weight is not their intent. And that fact that it starts at <1% of the total rather than ~70% makes no difference. Really? Seems apples and aardvarks to me.
Why would be Nickel any special? U-235 is enriched by a factor 6 from 0.7% to 4%.
Ni-62/64 is enriched from 4.6% to, what do you propose, 99%? 99,9999%?
KitemanSA wrote:bk78 wrote:
Kiteman, EITHER you claim that Rossi only has to deenrich Ni58 to, let's say, a few percent. Then your claim that Rossi does this to reduce gamma emmissions makes no sense, because if it was not deenriched, it would still not be harmful. OR you say, it will emit harmful levels of gamma if it was natural nickel, then you will have to deenrich it to ppm level so that no more radiation is detected. Between "harmful" and "nothing above background detected" there is a difference of at least 4 orders of magnitude. If you had thought about my earlier question for numbers instead of evading it, you might have noticed that yourself.
Boy you just can't keep up, can you?
Your "either" phrase is nonsense. First I don't claim anything. REMEMBER THAT. Otherwise you will continue to be afflicted by your fuzzy thinking.
I am sorry that the possibility that limiting the content of 58Ni to a low but not zero content may reduce the resultant gamma emission is beyond your cognative skills.
Actually, this was what I was talking about.You COMPLETELY ignored my point. If deenrichment of Ni-58 to a few percent is enough to make it undetectable, why should he bother the first place. If he did not, the radiation would be 100 times that much... so what?
KitemanSA wrote:Your OR statement is purely strawman. You state that it would have to get down to PPM. 4 orders of magnitude you proclaim. Based on what? What data supports your proclamation. None? Well, then you are just flapping your unknowing trap. Put up, or shut up? Or at least acknowledge that you are spouting "opinion", not fact.
Regarding the 4 orders of magnitude:
The detector was maybe 20..30cm away. For a person at 1m distance, dose rate is reduced by a factor of about 10. By summing up scintillator counts over a minute, you can easily detect changes at a few percent of natural background. Millions of people live all their life in areas with high natural background, and receive doses about an order of magnitude higher than someone in Bolgna, without known negative effects on health. Thats 4 orders of magnitude. Considering the limited time someone spends near the reactor, much higher levels could be regarded as harmless.
Considering radiation issues in general:
Let's say, the reactor produces his power in form of 6MeV (was it?) beta radiation. If you have kWs of this beta radiation, you get hundreds of watts of bremsstrahlung with a few MeV. 1 cm of lead will roughly half the intensity, 10 cm of water will half it again. Thats still many 10s of Watts coming outside the device, or 1E13...1E14 gamma particles per second.
Integrated over an hour, this would be hundreds of kJs. If a person stands close to it and covers 1% of the area as seen from the device, it receives some kJs. Divided by 80kg, thats 10s of Gray or 10s of Sieverts. This person will certainly die.
On the detecor side, I have a small piece of an uranium mineral, emitting a few 10s of nano Watts. If I put my cheap pocket sized scintillator at a distance of 30cm to it (thats only picoWatts at the detector!), count rate will go up from 5 counts per second (background) to 20. At higher gamma energys, as we would expect from the ecat, this decreases a lot, but it would still be detectable.
This means: Between the emissions we would expect to see, and what we are actually seeing, there is a gap of at least 9 orders of magnitude!
Even for the implausible claim that only Ni-58 emits beta and therefor is removed by Rossi, if one assumes similar cross section for all isotopes, then even a 1 ppm content of Ni-58 would lead to levels of radiation that are 1000 times higher than the detection limit.
And for this reason, Kiteman, I can't take your desperate efforts to make Rossis lies look like they made any sense serious.