As far as I remember 99% of costs of nuclear reactor is building this giant concrete around it so radiation don't go out and kill us because we have atmosphere and breath air. Since radiation is everywhere on the moon I don't think we need to care. There is no such thing as nuclear reactor explosion as far as I remember ( this is only media thing) so the core will just melt down and radiate. Still don't know if it will change anything ( I don't think so ).
Compete with what ? I want to see a decent budget and at least 5 year plan first. The scenario is ridiculous, each distribution have so many mirrors that you can't just ban internet, baning development is even more unrealistic given the nature of linux development. What they gonna do, ban email ? https://git-scm.com/docs/git-send-email
If they start with those products today with zero marketing budged and zero user base nobody would use it. Those CEOs are just clowns.