brandmeyer

126 ms·

1201.
by brandmeyer 11y ago
Normal reactor coolant isn't nearly that radioactive. However, there is a continuous filtration system that gets flushed from time to time, and it is extremely nasty stuff. Its possible that the yard worker was actually doused with f
1202.
by brandmeyer 11y ago
Spent fuel will be dangerous on time scales much greater than recorded history. However, the old reactor compartments primary source of radioactivity is Cobalt-60, with a half-life of about 5 years. So on time scales on the order of our n
1203.
by brandmeyer 11y ago
The defueling process is pretty slick. On a 688-class submarine, they remove a semi-cylindrical section of the hull around the reactor compartment (RC) before landing a temporary building on the RC. One tricky bit is the fact that the spen
1204.
by brandmeyer 12y ago
MPFR is sensitive in exactly the same way. Just because you can arbitrarily increase the precision of results with that library doesn't mean that it isn't still sensitive to roundoff error.
1205.
by brandmeyer 12y ago
That's because intervals tend to just keep growing. Without some function to make the interval smaller or otherwise keep it bounded, cumulative interval arithmetic tends to be useless. Using the rounding mode to calculate once with ro
1206.
by brandmeyer 12y ago
If you look carefully at your bill, you'll find that this is basically how it is structured in the US. Even commercial customers pay a demand charge (highest kW used in any 15 min period over the month, on the order of 10 USD/kW
1207.
by brandmeyer 12y ago
> However, the bad news is that all of these fixes are expensive and all of them take years As a power electronics control engineer I strenuously disagree. The historical problems with massive renewable penetration aren't just solv
1208.
by brandmeyer 12y ago
There is a disconnect between market forces in energy production right now. Right now, short-term grid frequency and voltage stability (periods of seconds to a few min) is regulated automatically by the governor response of the various gene