Idaho National Lab (INEL)

Idaho Falls, ID

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Reactor Data

Research Reactors

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Research and test reactors, critical assemblies and prototypes at this site, as listed in the IAEA Research Reactor Database: type, thermal power, first criticality, shutdown date, current status and what each is used for.
45 reactors: 4 operational, 38 decommissioned, 3 permanent shutdown.
Reactor Type Thermal Power First Criticality Shutdown Status Used For
TREAT Graphite, Pulse 8 kWt 1959-02-23 Operational materials testing
ATRC Pool 5 kWt 1964-05-19 Operational materials testing
ATR Tank 25 MWt 1967-07-02 Operational isotope production, materials testing
NRAD Triga Mark Ii 25 kWt 1977-10-12 Operational neutron radiography
EBR-I Fast Breeder 1.2 MWt 1951-08-01 Decommissioned materials testing
MTR Tank 40 MWt 1952-03-01 Decommissioned materials testing
S1W Submarine Prototype Pwr 7 kWt 1953-05-01 1989-10-01 Permanent shutdown training
BORAX-1 Experimental 1.4 MWt 1953-07-01 1954-07-01 Decommissioned materials testing, nuclear data
RMF Reactivity Measurement Facility Pool 100 Wt 1954-02-01 Decommissioned nuclear data
BORAX-2;-3;-4 Experimental 20 MWt 1954-10-01 1958-06-01 Decommissioned materials testing
SPERT-1 Special Power Excursion Test Tank 1 Wt 1955-07-01 Decommissioned materials testing
ZPR-3 Argonne Crit Fast 1 Wt 1955-10-01 Decommissioned nuclear data
HTRE-1 Air Cooled 20 MWt 1955-11-04 Decommissioned nuclear data
ETRC Tank 5 kWt 1957-01-01 Decommissioned materials testing, nuclear data
HTRE-2 Air Cooled 14 MWt 1957-07-01 Decommissioned materials testing
OMRE Organic Moderated Reactor Experimen Organic Moder 12 MWt 1957-09-01 Decommissioned materials testing
ETR Engineering Test Reactor Tank 175 MWt 1957-09-02 1981-12-01 Decommissioned materials testing, nuclear data
Critical Experiment Tank Air Cooled 5 kWt 1958-01-01 Decommissioned
HOTCE Crit Assembly 100 Wt 1958-01-01 Decommissioned materials testing, nuclear data
HTRE-3 Air Cooled 32 MWt 1958-01-01 Decommissioned materials testing
SL-1 Stationary Low Power Bwr Power 3 MWt 1958-08-11 Decommissioned training
A1W Prototype Reactor Pwr Propulsion 1958-10-01 1994-01-31 Permanent shutdown
SPERT-3 Special Power Excursion Test Pool 60 MWt 1958-12-19 Decommissioned materials testing, nuclear data
AFSR Argonne Fast Source Fast 1 kWt 1959-10-29 Decommissioned
GCRE, Gas Cooled Reactor Experiment Gas 2.2 MWt 1960-02-10 Decommissioned materials testing, nuclear data
SPERT-2 Special Power Excursion Test Pool 1 Wt 1960-03-11 Decommissioned materials testing, nuclear data
ARMF-I Advanced Reactivity Measurement Pool 1 kWt 1960-10-10 Decommissioned isotope production, neutron radiography, materials testing, activation analysis, nuclear data, training
ML-1 Mobile Low Power Reactor N2 Cooled 3.3 MWt 1961-03-01 Decommissioned materials testing, nuclear data
EBR-II Fast Breeder 62.5 MWt 1961-09-30 1994-09-01 Decommissioned materials testing
BORAX-5 Experimental 20 MWt 1962-02-09 1964-08-01 Decommissioned materials testing
710 Fast Spectrum Refractory Metals Crit Fast 1 Wt 1962-03-01 1968-06-01 Decommissioned
SPERT-4 Special Power Excursion Test Pool 1 MWt 1962-07-24 Decommissioned materials testing, nuclear data
630-A Marine Propulsion Air Cooled 1 Wt 1962-11-15 1968-06-01 Decommissioned training
HTMPR Crit Assembly 1 Wt 1962-11-15 Decommissioned
CFRMF Couple Fast Reactivity Measurement Pool 1 kWt 1962-12-04 Decommissioned isotope production, materials testing, nuclear data
SNAPTRAN-3 Zrh, H2o Cooled 1 Wt 1964-04-01 Decommissioned
SNAPTRAN-2 Zrh, Be Reflect 700 Wt 1965-01-01 Decommissioned
EBOR Beryllium Oxide Reactor Gas 10 MWt Decommissioned
S5G Submarine Prototype Pwr Propulsion 9 kWt 1965-09-01 1995-05-01 Permanent shutdown training
CRCE Cavity Reactor Critical Exp Heavy Water 1 Wt 1967-05-17 Decommissioned
ZPPR Zero Power Physics Reactor Crit Fast 1 kWt 1969-04-18 Decommissioned nuclear data
SCRCE Spherical Cavity Experiment Heavy Water 1 Wt 1969-12-10 Decommissioned
STR Split Table Reactor System Crit Fast 1 kWt 1971-06-01 Decommissioned
PBF Power Burst Facility Tank 28 MWt 1972-09-22 Decommissioned materials testing
LOFT Loss of Fluid Test Tank 50 MWt 1978-02-05 Decommissioned
Source: IAEA Research Reactor Database (RRDB), as of 2026-10-13.

Fuel Cycle Facilities

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Fuel cycle plants at this site, as listed in the IAEA Nuclear Fuel Cycle Facilities Database: what each plant does, its scale and design capacity, the years it operated, its current status and who operates it.
2 facilities: 2 in operation.
Facility Type Scale Design Capacity Operated Status Operator
Idaho TAN-607 demonstration AFR Dry Spent Fuel Storage Laboratory 0 t HM 1975– In Operation Westinghouse / Idaho Nuclear Co
TMI-2, Debris at Idaho AFR Dry Spent Fuel Storage Laboratory 130 t HM 1999– In Operation
Source: IAEA Nuclear Fuel Cycle Facilities Database (NFCFDB), as of 2026-10-13.

Working Here

Per Diem Rates FY 2027

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Per diem covers lodging and meals & incidental expenses (M&IE) for government and contractor travel near this facility. Rates are from GSA for FY 2027.
$113
Lodging/Night
$68
M&IE/Day
$181
Total/Day
Standard Rate, ID

Unemployment Benefits ID

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Maximum state unemployment insurance benefits for ID. Actual benefits depend on your earnings history and may be lower than the maximum. Data as of Jan 2026.
$531
Max Weekly
20
Max Weeks
$10,620
Max Total
7-day waiting period before benefits begin

Photos

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Photos of this facility from the NukeWorker photo gallery. Click the header or any photo to browse the full album.

Facility Map

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Interactive satellite map showing the facility's geographic location. Marker color indicates current status: green for online, red for offline, orange for reduced power. Click the header to open in Google Maps satellite view.

43.591, -112.938

Location & Contact

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Physical address, phone number, and website for this facility. Use the directions link to get driving directions via Google Maps.
Address:
Idaho Falls, ID 83415, USA
Get Directions

NukeWorker Member Ratings 64 votes

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Community ratings from NukeWorker members. Vote to share your experience working at this facility. Score uses a Bayesian average that accounts for vote count — facilities with few votes are pulled toward the fleet average, so rankings reflect confidence, not just raw percentages.
Above Average 11 (17%)
Average 20 (31%)
Below Average 33 (51%)
Score
39.9
Rank
#89 of 97
Bottom Quartile

Plant Facts

About This Site

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Written by NukeWorker from public records: facts that do not change. Operator, status and capacity come from the live data elsewhere on this page. Sources: Wikipedia: Idaho National Laboratory.

Idaho National Laboratory (formerly the Idaho National Engineering Laboratory) covers about 890 square miles of high desert on the Snake River Plain in eastern Idaho. It lies between Arco, Idaho Falls and Blackfoot, near the town of Atomic City.

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The Navy used the area during World War II to re-sleeve and test large guns, and the federal government established the National Reactor Testing Station there in 1949. Experimental Breeder Reactor I lit four light bulbs on December 20, 1951, the first usable electricity from nuclear fission. On July 17, 1955, the BORAX III reactor powered the town of Arco. The SL-1 reactor was destroyed in a steam explosion on January 3, 1961, killing three military personnel. The site became INEL in 1974 and Idaho National Laboratory in 2005.