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Hochtemperatur-Kernkraftwerk GmbH

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German operator of the THTR 300 high-temperature nuclear reactor in Hamm.

Last updated September 26, 2026

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Overview

Hochtemperatur-Kernkraftwerk GmbH (HKG) is a German company based in Hamm, Germany, that operates the THTR 300 high-temperature nuclear reactor. According to its official website, HKG describes itself as a "Gemeinsames Europäisches Unternehmen" (Joint European Undertaking) and operates the THTR 300 facility. The company provides information about itself and the THTR 300 plant through its website. The THTR 300 (Thorium High-Temperature Reactor) was a prototype high-temperature gas-cooled reactor, and HKG is the entity responsible for its operation. The company is registered as a Gesellschaft mit beschränkter Haftung (GmbH), a German limited liability company. Its headquarters are in Hamm, Germany. The official website is thtr.de.

History

Hochtemperatur-Kernkraftwerk GmbH (HKG) is a German company based in Hamm, Germany, that operates the THTR 300 high-temperature nuclear reactor. The company is registered as a Gesellschaft mit beschränkter Haftung (GmbH). According to its official website, HKG describes itself as a "Gemeinsames Europäisches Unternehmen" (Joint European Undertaking) and operates the THTR 300 facility. The THTR 300 (Thorium High-Temperature Reactor) was a prototype high-temperature gas-cooled reactor. HKG provides information about itself and the THTR 300 plant through its website. The company's headquarters are in Hamm, Germany. The official website is thtr.de.

Products and positioning

Operator of a prototype high-temperature nuclear reactor as a joint European undertaking.

  • THTR 300 high-temperature nuclear reactor

    A prototype high-temperature gas-cooled nuclear reactor operated by HKG.

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