In January 1991 a model of the TOPAZ-II was exhibited at a scientific symposium in Albuquerque, generating interest in the US in the possible purchase of it and the Strategic Defense Initiative Organization arranged to buy two Topaz-2 reactors from Russia for a total of $13 million, planning to use the reactors to improve US models. However, the Nuclear Regulatory Commission ruled that US law prohibited the "export" of such a device to the Soviet Union - even though it was Soviet-made and only a model rather than an actual reactor. It took a month before the situation was resolved by a new NRC ruling and the model returned to Russia.