Disarming Notion

Here's a little gift from the universe: North Korea has agreed to nuclear disarmament. Like all gifts, however, there is a price tag: They agreed Tuesday to shut down its main nuclear reactor and eventually dismantle its atomic weapons program in exchange for millions of dollars in aid. When I first read the article, I read "four million dollars in aid." The truth is, that would be getting off cheap. It's more likely that there will be factors of ten applied abruptly, as well as a player to be named later.
Still, a deal is a deal, and we should all breathe a sigh of relief on that. Presently we see a result gained through diplomatic means, that should not go without notice. The part about it that makes me flinch most wildly is this: Just how do we keep the genie in the bottle now that he has come out and said "Howdy do" to North Koreans? I forget my cell phone number because I so rarely use it, but will their physicists have to take a super-secret oath never to tell anyone how to enrich uranium? What if we're a little late one month with the check? Will they fire up their reactor all over again?
Today, at least, it's better not to worry about such things. We can imagine a new era of cooperation on the Korean peninsula. An era fostered in mutual respect, collaboration, and hundreds of millions of dollars. Just so I'm clear on this, how much would it cost if they just let the reactor burn?