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Comment Re:Waste disposal not included (Score 1) 343

The Hamm-Uentrop accident was the result of a stuck fuel 'pebble', not something related to it being a breeder reactor or even a gas-cooled reactor.

Which failed molten salt experiment are you referring to, this one? I would not characterize it as a failure at all - if fact it was a rousing success, even if there were a few lessons learned along the way that influenced the MSR design going forward. "Much of the high cost [of decommissioning] was caused by the unpleasant surprise of fluorine and uranium hexafluoride evolution from cold fuel salt in storage that ORNL did not defuel and store correctly, but this has now been taken into consideration in MSR design." [emphasis mine]

Comment Re:Waste disposal not included (Score 1) 343

You realize that breeder reactors do not have to be based on molten sodium, right? Molten salt fast reactors and Gas-cooled fast reactors have similar neutron energy profiles without the danger of sodium as a coolant. The molten salt reactor can even leverage molten fuel, simplifying the design.

Comment Re:Actual savings? (Score 1) 116

The only downside to switching over to LED-filled fake fluorescent tubes is the cost of producing fake tubes that have to handle different input voltages. With the old ballast system the input voltage was handled by the ballast the the tube got the correct strike/run voltage/current regardless. Lots of SOHO fluorescent ballasts are designed to run off 120V and many that are installed in businesses are designed to run off 208V (high leg delta), 240V (phase to phase), 277V (phase to neutral in a 480V wye), etc.

If the LED tube power supply is intelligently designed, they should be able to accept 120V-277V much like modern wall warts do - the challenge will be making them efficient at the same time.

https://www.crmagnetics.com/Po...

Comment Re:Please explain (Score 4, Insightful) 74

For all intents and purposes, the objects are the same distance from Earth. They're 450 light-years from each other and both are approximately 4.3 BILLION light-years from Earth. The maximum difference in distance between object A and Earth and object B and Earth is 0.000010465116% (450 / 4.3x10^9 * 100). Close enough to the same distance. For reference, the same delta applied to 1 AU (93,000,000 mile Earth-Sun distance) yields 9.73 miles.

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