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rwiker
PostPosted: Tue Feb 19, 2019 7:04 am 
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Joined: Thu Mar 03, 2011 5:56 pm
Posts: 284
... like (possibly) the Fukushima nuclear plant: https://arstechnica.com/science/2019/02/japanese-utility-makes-first-contact-with-melted-fukushima-fuel/?comments=1&post=36863701
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BigEd
PostPosted: Tue Feb 19, 2019 8:21 am 
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Joined: Thu Dec 11, 2008 1:28 pm
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Location: England
Ah, rad-hard by virtue of being (relatively) huge:
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Part of it is using much older design chips (in some cases they're experimenting with 70s vintage 6502) which for some reason, larger transistor junctions or something, aren't as touchy to the radiation and reduce shielding necessary.


Possibly being NMOS rather than CMOS helps - a static design would also have helped. As we know, the 6502 uses dynamic charge storage. And if you moved to a 65C02 you'd get the latch-up risk.
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