plutonium
Let an agent explain plutonium as an element and its isotopes, relay properties, production in general terms, uses in energy and space, and hazards from chemistry and public reference sources, describe safeguards and arms control with attribution, and decline weapons design, processing or acquisition detail.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What plutonium is.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of plutonium, including its allotropes? definition
- Is the question about the element and its public science, or about weapons, processing or acquisition the model does not cover? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- What isotopes exist, and what are the roles of plutonium-238, 239, 240 and 244? measurement
- Which entry fits the specific isotope? action
Use Uses.
Energy
Nuclear energy.
Energy
Energy.
- How is plutonium formed and used in reactors and MOX fuel, in general terms? provenance
- Which references are standard? provenance
Space
Space power.
Space
Space.
- How does plutonium-238 power spacecraft such as Voyager and Perseverance? provenance
- Which entry fits radioisotope thermoelectric generator? action
Safety Hazards and safeguards.
Hazards
Hazards.
Hazards
Hazards.
- What are the radiological and toxic hazards of plutonium, and how are workers and the public protected? provenance
- Which sources are cited? provenance
Safeguards
Safeguards.
Safeguards
Safeguards.
- How do IAEA safeguards and arms control treaties address plutonium, with positions attributed? provenance
- Is the presentation neutral and non-operational? boundary
Context History and waste.
History
History.
History
History.
- How was plutonium discovered in 1940, and how did its history unfold through the Manhattan Project and the Cold War, as historians describe? provenance
- Which entry fits the history of nuclear weapons? action
Waste
Waste and disposition.
Waste
Waste.
- How are surplus plutonium and spent fuel managed, and what debates exist, with positions attributed? provenance
- Which entry fits radioactive waste? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- plutonium-239, plutonium-228, plutonium-229, plutonium-230, plutonium-231, plutonium-232, plutonium-233, plutonium-234, plutonium-235, plutonium-236, plutonium-237, plutonium-243
What it is Filled
A chemical element with symbol Pu and atomic number 94, a radioactive actinide metal produced in nuclear reactors from uranium-238 and existing naturally only in trace amounts, with isotopes from plutonium-228 to plutonium-247, of which plutonium-239 is fissile and used in nuclear weapons and reactor fuel, plutonium-238 powers spacecraft through radioisotope generators, and plutonium-244 is the longest-lived; plutonium is highly toxic when inhaled, tightly controlled under non-proliferation safeguards, and described here at the level of public reference sources without weapons or enrichment detail.
Why it exists Filled
Let an agent explain plutonium as an element and its isotopes, relay properties, production in general terms, uses in energy and space, and hazards from chemistry and public reference sources, describe safeguards and arms control with attribution, and decline weapons design, processing or acquisition detail.
Distinguishing features Filled
- Reactor-produced
- Fissile isotope 239
- Six allotropes
- Strict safeguards
What robots and AI may and may not do Filled
Must not
- Provide any information that would help make, separate, acquire or weaponize plutonium.
- Help evade nuclear safeguards, export controls or material accounting.
- Advise anyone to handle, move or store plutonium outside licensed facilities.
- Downplay radiological or toxic hazards of exposure.
Only with a human decision
- Any action affecting systems that store, process or transport nuclear material.
May
- Explain plutonium's properties, isotopes and history, citing physics and nuclear agency sources.
- Relay public information on its role in reactors, space power sources and nuclear safeguards.
Moral aspects Filled
- Plutonium can be used in nuclear weapons, so its control matters to global security.
- Its long-lived waste places burdens on future generations and on communities near storage sites.
Who is affected
- Workers in nuclear facilities
- Communities near storage and processing sites
- Future generations
Owners Filled
Steward
The licensed nuclear operator holding it, under national regulators and international safeguards.
Master systems
- National nuclear material accounting systems
- International safeguards records
Links to other meta-models Filled
parent
- Q105789 - registry parent class
- Q19577 - registry parent class
related
- actinide - in registry terms
- heavy metal - in registry terms
- uranium-238 - by neutron capture
- Treaty on the Non-Proliferation of Nuclear Weapons - safeguards
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.plutonium
- Wikidata: Q1102 (https://www.wikidata.org/wiki/Q1102)
- CAS: 7440-07-5 plutonium
- symbol: Pu element
Direct properties required Filled
- atomic number: 94 Z
- density: about 19.8 g/cm^3 - alpha phase
- plutonium-239 half-life: about 24100 years
- plutonium-238 half-life: about 87.7 years
- allotropes: 6 count - at ambient pressure
Recognition required Filled
- Radioactive actinide element
- Plutonium-239 fissile isotope, plutonium-238 for space power, plutonium-244 longest-lived, lighter isotopes 228 to 232 from experiments
- Uranium is the parent element; neptunium precedes it; americium follows
- A silvery metal that tarnishes to grey and is warm from decay.
Capabilities and actions required Filled
- explain properties and isotopes
- relay uses and hazards
- relay safeguards context
- decline sensitive detail
Hazards and failure modes required Filled
- Agents providing weapons, processing or acquisition detail
- Inhalation toxicity and radiation exposure
- Criticality accidents in handling
- Proliferation risk
Standards and interfaces required Filled
- IAEA safeguards and the NPT
- National nuclear material control and export laws
- Radiation protection standards for handling and transport
Context of use required Filled
- Reactor fuel, space power sources and, historically, weapons.
- plutonium-239 in fuel and weapons
- plutonium-238 in radioisotope thermoelectric generators
- plutonium-240 and 241 in reactor-grade material
- plutonium-244 the longest-lived isotope
- short-lived isotopes such as plutonium-228 to 232
- plutonium compounds such as the dioxide in MOX fuel
Sources Filled
- Wikidata item Q1102: plutonium - identity and sense of the item
- Wikipedia: Plutonium - general description of the item
Open questions
- Should isotopes of plutonium and radioisotope thermoelectric generator be separate entries?
- How should chemistry and IAEA sources be linked?
- The registry entry has merged aliases naming individual isotopes; should they be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1102/spec.json