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Expect the Extraordinary.


Entergy—Grand Gulf Nuclear Generating Station

APTIM provides best-in-class maintenance, modification and construction services to Entergy at the Grand Gulf Nuclear Station, located near Port Gibson, Mississippi. The station is a single-unit GE BWR-6 MARK III boiling water reactor, generating 1,250 MW of electricity. The plant has a 520-foot natural draft cooling tower. The scope of services include modification and supplemental maintenance services, and capital projects. 

Staff/Craft Levels: 4/600—Outage  1/40—Non-Outage 

Representative tasks include:

  • Snubber testing and installation
  • ISI support
  • Electrical modifications
  • Piping modifications
  • Civil modifications
  • Operate polar crane and turbine gantry crane
  • Cooling tower maintenance and repairs
  • Plant painting
  • Scaffold support
  • Plant chiller replacement/ modifications
  • Suppression pool platform installation
  • Suppression pool suction strainer installation 

APTIM provides maintenance and modification services to the Entergy North and South nuclear fleets, including Grand Gulf Nuclear Generating Station. APTIM enjoys a successful relationship with Entergy, a strategic account. We have supported numerous refuel outages and forced outages over the past several years. APTIM utilizes mixed craft for certain tasks to maintain a diverse workforce for possible emergent work. We also move core group craft employees from site to site to support refueling outages and forced outages.