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1440 MW Nuclear operating in Claiborne, MS — Midcontinent Independent Transmission System Operator, Inc..
1,440 MW
Nameplate Capacity
1
Generators
unit
Nuclear
Technology
1985
Operating Since
Coordinates
32.0081, -91.0478
County
Claiborne, MS
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | System Energy Resources, Inc | Entergy Nuclear Operations | Entergy |
| Owner(s) | Cooperative Energy, System Energy Resources, Inc | Systems Energy Resources Inc | — |
| Status | Operating | operating | — |
GEM identifies the owner as Systems Energy Resources Inc
This entity is not yet in the GEM ownership database — chain unavailable.
Grand Gulf Nuclear Station is a nuclear power station with one operational GE BWR reactor. It lies on a 2,100 acres (850 ha) site near Port Gibson, Mississippi. The site is wooded and contains two lakes. The plant has a 520-foot natural draft cooling tower. As of January 2023, the plant employs 675 people.
Read more on WikipediaGrand Gulf Nuclear Generating Station is a 1440 MW nuclear power plant located in Claiborne County, Mississippi. The plant, which began operating in 1985, is the largest in the state and ranks 33rd nationally among nuclear facilities. It consists of a single nuclear generator and is operated by System Energy Resources, Inc. The plant's primary fuel source is nuclear (NUC).
In the most recent year with available data, Grand Gulf generated 11,492,701 MWh of electricity, achieving a capacity factor of 90.9%. The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. Financial data indicates an installed cost of $2879.63 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
955.6K MWh
Latest Month
11.5M MWh
Annual Generation
90.9%
Capacity Factor
Nuclear · System Energy Resources, Inc. · Data from 2015–2024
$3,812/kW
Installed Cost
$114/kW
Annual CapEx
$23.9/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Market Position
ISO/RTO Market
MISO
LMP Node
EES.G_GULF_A
Pricing Hub
MS.HUB
Node Source
EIA-860 direct report
Last updated 2026-04-19
View all 10 articlesNo ask pi reports yet for this entity.
ask pi about Grand GulfMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility