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Ishikari LNG Terminal
Ishikari LNG Terminal (石狩LNG基地) is a liquefied natural gas import terminal at Ishikari Bay New Port in Hokkaido, Japan, opened in 2012 and operated by Hokkaido Gas.
İsken Sugözü power station
The İsken Sugözü power station is a two-unit coal-fired power plant near İskenderun, Turkey, commissioned in 2003 as Turkey's first privately owned coal-fired power station.
Island divertor
The island divertor is a plasma exhaust concept for stellarators, proposed by Lyman Spitzer, in which magnetic islands at the plasma edge guide escaping particles and heat to target plates, demonstrated on Wendelstein 7-X.
Islanding
Islanding is the condition where part of an electric power system stays energized after separating from the grid, either deliberately as with microgrids or unintentionally.
Islanding detection
Islanding detection is the set of techniques a distributed generator uses to detect that it has separated from the main grid, so it can stop energizing the isolated section.
ISO 14687
ISO 14687, titled Hydrogen fuel quality — Product specification, is an international standard setting minimum quality characteristics of hydrogen fuel for vehicular, stationary, and other applications.
ISO 15118
ISO 15118, titled Road vehicles — Vehicle-to-grid communication interface, is an international standard for communication between electric vehicles and charging stations, covering Plug & Charge, smart charging, and bidirectional charging.
ISO 19902
ISO 19902, published by the International Organization for Standardization, sets requirements for designing and installing fixed steel offshore structures in petroleum and natural gas production.
ISO 25745
ISO 25745, titled Energy performance of lifts, escalators and moving walks, is a three-part ISO standard series for measuring, calculating, and classifying the energy use of lifts, escalators, and moving walks.
ISO 50001
ISO 50001 is the international standard published by ISO that specifies requirements for an energy management system, helping organizations of any size improve energy performance; the current edition is ISO 50001:2018.
ISO 9806
ISO 9806, titled Solar energy — Solar thermal collectors — Test methods, is an international standard for testing the durability, reliability, safety, and thermal performance of solar collectors.
ISO New England
ISO New England, also called ISO-NE, is the corporation that runs the New England power grid and administers its competitive wholesale electricity markets, serving 7.6 million retail customers across six states.
Isogo power station
Isogo power station (Isogo Thermal Power Station) is a 1,200 MW coal-fired power plant in Yokohama, Japan, owned by J-POWER and known for low-emissions clean coal technology.
Isoko South Oil and Gas Field
The Isoko South Oil and Gas Field is an operating conventional oil and gas field in Delta State, onshore Nigeria, held within Oil Mining Lease 30 and operated by Shoreline Natural Resources.
Isolated-phase bus
An isolated-phase bus, also called isolated-phase busduct, is a metal-enclosed busbar system carrying very large alternating currents, in which each phase has its own grounded enclosure.
ISOS stability protocols
The ISOS stability protocols are consensus procedures for testing the stability of organic and perovskite solar cells, established at a summit in Roskilde, Denmark, in 2010.
Isothermal CAES
Isothermal CAES, or isothermal compressed air energy storage, stores electricity by compressing air at nearly constant temperature, avoiding stored heat or fuel, with no commercial systems yet.
Isotope separation system
An isotope separation system is part of a fusion reactor's tritium plant that separates deuterium from tritium so recovered fuel can be recycled, typically by cryogenic distillation.
Israel Electric Corporation
Israel Electric Corporation (Hebrew: חברת החשמל לישראל, IEC) is the state-owned electric utility of Israel, founded in 1923 as the Palestine Electric Company at the initiative of Pinhas Rutenberg.
ISTTOK
ISTTOK (Instituto Superior Técnico TOKamak) is a small research tokamak in Lisbon, Portugal, operating since 1990 as the country's only fusion device and known for alternating plasma current discharges.
ISX-B
ISX-B was an iron-core tokamak at Oak Ridge National Laboratory, rebuilt from ISX-A in 1978 to study how much plasma pressure, called beta, a tokamak could hold.
Itá hydroelectric plant
The Itá hydroelectric plant (Portuguese: Usina Hidrelétrica Itá, UHE Itá) is a 1,450 MW run-of-river power station on the Uruguay River between Aratiba and Itá, Brazil, operating since 2000.
Italgas
Italgas is an Italian gas distribution company headquartered in Milan that operates networks in Italy and Greece; after acquiring 2i Rete Gas in 2025, it became Europe's leading gas distribution operator.
Italy–Montenegro interconnector
The Italy–Montenegro interconnector, known as the MONITA project, is a 445 km HVDC submarine power link between Cepagatti, Italy, and Lastva, Montenegro, inaugurated in 2019 with 600 MW capacity.
Itapu Field
Itapu Field is a Brazilian pre-salt oil field in the Santos Basin, about 200 km off Rio de Janeiro, operated by Petrobras and producing through the FPSO P-71 since December 2022.
Itau Gas Field
The Itau Gas Field (Itaú) is an onshore gas and condensate field in Bolivia's Tarija Department, discovered in 1999 by Total and producing since February 2011.
ITC Holdings
ITC Holdings is an American independent electricity transmission company, the largest in the United States, founded in 2003 and operating about 16,000 circuit miles of lines across 8 states as a subsidiary of Canada's Fortis Inc.
ITER blanket
The ITER blanket is the system of modular panels lining the ITER vacuum vessel that absorbs heat and neutrons from the plasma and shields the vessel and magnets.
ITER divertor
The ITER divertor is the component at the bottom of the ITER tokamak's vacuum vessel that removes heat and helium ash from the plasma and shields surrounding walls, sustaining heat loads of 10 MW/m².
ITER-like wall
The ITER-like wall (ILW) is the beryllium and tungsten plasma-facing first wall of the JET tokamak at Culham, UK, matching ITER's materials. Installed in 2011, it replaced JET's carbon wall.