Vogtle: NLO's are Union, unsure about RO's, SRO's=salaried management.
Grand Gulf: NLO's & RO's=Union, SRO's=salaried management.
Catawba: Non-Union plant for all.
Brunswick: NLO's & RO's=Union, SRO's=salaried management.
Robinson: Non-Union plant for all (only 99% sure on this one.)