How has nuclear power changed since Chernobyl?

How has nuclear power changed since Chernobyl?
"...It is necessary to acknowledge that while some riskswill always be there, nuclear power is actually safer than ever, and importantly, it could help curb our insatiable appetite for fossil fuels.
To learn more about this funky world of radioactive physics, we’re going to answer some questions about how our nuclear landscape has changed since 1986 (I’d say spoiler alert, but that’s not really applicable to historical events that happened decades ago). 

• How much nuclear energy do we use today?

As of July 2019, 416 nuclear reactors are operating in 34 countries, and they’re producing about 10.3% of the world’s electricity. 
That’s a marked drop from their peak share of 17.5% of worldwide electricity in 1996...

Distribution of total energy consumption in the US. Image Credit: Institute for Energy Research.

• Are Chernobyl-like reactors still in use today, and are reactor cores still made of graphite?
• Do you have any questions about Chernobyl or nuclear physics? Ask in the comments below!–Lissie Connors