Why Should a Nuke Loan Guarantee Cost Less than Home or Student Loans?

In this mention

Harvey Wasserman critiques the Department of Energy's offer of favorable loan guarantee terms to Southern Company for the Vogtle nuclear expansion project. The article notes that SACE has challenged the $8.33 billion loan guarantee package through FOIA litigation, arguing that the credit subsidy fee is too low relative to project risks. The piece compares the nuclear industry's favorable terms to those available for student loans and home mortgages.