Not surprising this regime would set up this important site in Qom. From what I understand, that is the city where the Madhi went into hiding and will supposedly reappear.
Qom or Ghom, is a city where traditionally Shia (12ers) Islamic seminaries in Iran are located. IOW, Qom is the major (official) hub of Iran's Islamic world. You know, those ruthless centuries old guardians of Shia (12ers) Islam in Iran - ayatollahs such as Khomeini included.
In terms of 'holiness' Qom is it. Similar to Mashad in Khorassan province of Iran, where there is the shrine of the 8th Shi'ite Imam Reza. The latter attracts many Shia pilgrims from around the world. Think Mecca (S. Arabia) on a smaller scale.
If true about uranium enrichment site, military complex & Qom, well, it could potentially mean hitting 3 for price of 1 - tho it can't be touched, it is considered a "holy" place by some very "important" people around the world.