Advanced Test Reactor (ATR)
Located at Idaho National Laboratory in Idaho Falls, USA, the Advanced Test Reactor (ATR) is one of the world's most powerful research reactors. It holds significant importance due to its high steady-state neutron flux, crucial for materials testing and fuel irradiation for civilian nuclear applicat
Key Stats
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Advanced Test Reactor (ATR)
Status: OPERATIONAL Category: RESEARCH Country: USA USA Operator: idaho-national-laboratory Type: Tank Tank Capacity: 250 MWth (thermal only)
Overview
Located at Idaho National Laboratory in Idaho Falls, USA, the Advanced Test Reactor (ATR) is one of the world's most powerful research reactors. It holds significant importance due to its high steady-state neutron flux, crucial for materials testing and fuel irradiation for civilian nuclear applications. Operational since 1967, it continues to support isotope production and advanced nuclear research.
Key Facts
Notes
One of the world's most powerful research reactors; world's highest steady-state neutron flux for materials testing. INL, Idaho Falls.
Source: IAEA PRIS / reactors_canonical · Enriched by Grok Last updated: 2026-05-10
Sources
- IAEA PRIS - Advanced Test Reactor — Official record of the ATR in the IAEA Power Reactor Information System.
- NRC - Operating Reactors List — General information on operating reactors in the USA, including research reactors like ATR.
- Wikipedia - Advanced Test Reactor — Detailed overview of the ATR's history, design, and purpose.
- Idaho National Laboratory - ATR [UNVERIFIED] — Official page from the operator, Idaho National Laboratory, with specifics on ATR's capabilities and research applications.
- World Nuclear Association - USA Profile — Overview of nuclear power and research facilities in the USA, including mention of ATR.
- World Nuclear News - ATR Article [UNVERIFIED] — News on ATR's role in supporting microreactor fuel testing, published by World Nuclear News.
Sources (1)
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