Voltane Nuclear sites Tennessee Johnsonville
Tennessee · Former coal plant
Johnsonville
Johnsonville is a former coal plant in Humphreys County, Tennessee. EIA records 10 coal units retired in 2015–2017 (1,485 MW). 1,676 MW of generation still operates at the site (natural gas fired combustion turbine): an existing grid connection, shown in the app as a proxy, never as available capacity.
Screening match Microreactor
78.9 / 100
Data for 100% of the criteria
SMR
84.5 / 100
Data for 100% of the criteria
Large reactor
84.6 / 100
Data for 100% of the criteria
Screening only — not a site suitability determination.
Location Humphreys County, Tennessee. Approximate location (36.03, -87.99). Nearby candidate sites Johnsonville ranks 3rd of 14 candidate sites in Tennessee by SMR match.
Get the full screening Signed-in Voltane Nuclear shows what each match is made of:
The factor-by-factor breakdown: transmission, population, seismic hazard, faults, flood, water, airports, dams, pipelines and data-center load The printable site report and the CSV export The interactive map with every layer, custom weights and Ask Voltane Request a demo Sources This site Every match U.S. EIA, EIA-860M monthly generator inventory — August 2026 inventory (released 2026-09-23/24); preliminary per EIA.U.S. EIA, EIA-860 annual generator report — 2025 final, released 2026-09-10U.S. NRC, power reactor status, decommissioning and early site permits — Checked 2026-10-04: List of Power Reactor Units (updated 2026-09-14), Power Reactor Status for the last 365 days (to 2026-10-02), decommissioning list (updated 2026-09-14), ESP pages (updated 2026-09-23)Federal sites named for new nuclear by an official source — Official announcements 2025-04-03 to 2026-09-28U.S. Census Bureau, 2020 Census blocks and population — 2020 Census (P.L. 94-171 counts on 2020 blocks); files dated 2023-01..2023-03 U.S. Census Bureau, 2020 urban areas and gazetteer — 2020 Census urban areas (UACE20), 2023 gazetteer releaseUSGS National Seismic Hazard Model — CONUS 2023 (R2), Alaska 2023 (R1), Hawaii 2021 (R1), Puerto Rico/USVI 2025 (R1) USGS Quaternary Fault and Fold Database — Archive dated 2026-02-23 (database edition Qfaults_2020)USGS National Atlas hydrography — 2014 editionLBNL harmonized U.S. transmission lines — Published 2026-08-03, updated 2026-09-22HIFLD electric power transmission lines (final public release) — HIFLD final release, data to 2024-09-30OpenStreetMap power lines — OpenStreetMap snapshot 2026-09-28 JRC / Copernicus GloFAS river flood hazard maps — v2.1.2 (2026-01-12; tiles 2025-12-18) FAA NASR airports — NASR cycle effective 2026-10-01USACE National Inventory of Dams — Data last updated 2026-09-23U.S. EIA natural gas pipelines — January 2020 update, the latest EIA has publishedOpenStreetMap data centers — OpenStreetMap snapshot 2026-09-28 Epoch AI, AI data centers — File dated 2026-09-08Matches from Voltane Nuclear's screening model of 2026-10-17. Weights are product assumptions, not NRC rules.
Source: U.S. Energy Information Administration; U.S. NRC; U.S. Census Bureau (not endorsed or certified by the Census Bureau); U.S. Geological Survey; Federal Aviation Administration; U.S. Army Corps of Engineers.OpenStreetMap contributors (ODbL 1.0), community-mapped and not exhaustive. Map: U.S. Census Bureau cartographic boundaries.
Screening only — not a site suitability determination.
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