If all they wanted was nuclear power, they would buy an existing plant design and the fuel that it used.
U-235 nuclear plant fuel (despite all of the hype) is not weapons-grade material - it's not enriched enough (95%+ for weapons). So, if all they wanted was fuel, they'd buy it and save all of the time and expense involved in developing their own enrichment process and program.
This is the Pub. Leave common sense at the door.