Special Power Excursion Reactor Test series

E99198

experimental nuclear reactor experimental nuclear reactor program reactor safety research program

The Special Power Excursion Reactor Test (SPERT) series was a set of experimental nuclear reactors used in the mid-20th century to study reactor safety and behavior under rapid power excursions.

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All labels observed (2)

Label	Occurrences
Special Power Excursion Reactor Test series canonical	6
Special Power Excursion Reactor Test III	1

How this entity was disambiguated

This entity first appeared as the object of triple T854085 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Special Power Excursion Reactor Test series
Context triple: [Idaho National Engineering Laboratory, hasFacility, Special Power Excursion Reactor Test series]

A. D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
B. K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
C. K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
D. N Reactor
N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
E. X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Special Power Excursion Reactor Test series
Target entity description: The Special Power Excursion Reactor Test (SPERT) series was a set of experimental nuclear reactors used in the mid-20th century to study reactor safety and behavior under rapid power excursions.

A. D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
B. K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
C. K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
D. N Reactor
N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
E. X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
F. None of above. chosen

Statements (44)

Predicate	Object
instanceOf	experimental nuclear reactor ⓘ experimental nuclear reactor ⓘ experimental nuclear reactor ⓘ experimental nuclear reactor ⓘ experimental nuclear reactor program ⓘ reactor safety research program ⓘ
coolant	light water ⓘ
country	United States ⓘ linked to: United States of America
dataUsedBy	nuclear regulatory bodies ⓘ reactor designers ⓘ safety analysts ⓘ
designedFor	development of reactor safety criteria ⓘ safety analysis code validation ⓘ
endTime	1960s ⓘ
era	Cold War ⓘ
field	nuclear engineering ⓘ nuclear safety ⓘ reactor physics ⓘ
fuelType	low-enriched uranium ⓘ
hasPart	SPERT-I ⓘ SPERT-II ⓘ SPERT-III ⓘ SPERT-IV ⓘ
location	Idaho ⓘ National Reactor Testing Station ⓘ linked to: Idaho National Engineering Laboratory
locationCountry	United States ⓘ linked to: United States of America
moderator	light water ⓘ
notableOutcome	data for reactor safety standards ⓘ improved understanding of prompt critical excursions ⓘ
operator	U.S. Atomic Energy Commission ⓘ linked to: United States Atomic Energy Commission
partOf	Special Power Excursion Reactor Test series ⓘ Special Power Excursion Reactor Test series ⓘ Special Power Excursion Reactor Test series ⓘ Special Power Excursion Reactor Test series ⓘ
purpose	examine reactor transient response ⓘ investigate behavior under rapid power excursions ⓘ study reactor safety ⓘ
safetyFocus	consequences of control rod ejection and withdrawal errors ⓘ reactor stability under rapid reactivity insertions ⓘ
sponsor	United States government ⓘ
startTime	1950s ⓘ
testType	power excursion experiments ⓘ reactor transient tests ⓘ
usedIn	design of commercial power reactor safety systems ⓘ