North Korea's Potemkin Bomb?

Question

The Federation of American scientists have layed out some possibilities regarding whether the north Korean nuclear test was a success or not, and one of them is that it is possible the bomb was a Potemkin Bomb. What does that mean?

Answer 1

What there saying is the test went South, And that the Reaction was just a Nuclear Fissall ( Nuclear Dud ) sore to Speak.