Search
Search plants, projects, owners, and states
Search plants, projects, owners, and states
1440 MW Nuclear operating in Claiborne, MS
1,440 MW
Nameplate Capacity
1
Generators
unit
Nuclear
Technology
1985
Operating Since
Coordinates
32.0081, -91.0478
County
Claiborne, MS
Forward-looking, asset-specific exposure analytics combining climate hazards, generation variability, and counterparty risk into a single decision-grade view. Powered by InfraRisk.
See the full risk decomposition + scenarios for this asset.
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
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
955.6K MWh
Latest Month
11.5M MWh
Annual Generation
90.9%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this asset.
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
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this asset.
Market Position
ISO/RTO Market
MISO
LMP Node
EES.G_GULF_A
Pricing Hub
MS.HUB
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-04-19
View all 10 articlesNo Ask reports yet for this entity.
Ask about Grand GulfForward forecasts, scenario decomposition, and risk-decision tooling for this asset.
NRC accepted Entergy's early site permit renewal application for a potential second unit at Grand Gulf for formal review
sourceNRC formally accepted a combined licence application (COL) for a new reactor unit at Grand Gulf for review
sourceGrand Gulf Nuclear Station began its 25th scheduled refueling outage on Feb. 14, 2026, removing the unit from service
sourceEntergy publicly exploring addition of a second reactor unit at Grand Gulf Nuclear Station
source