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.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
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.
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.
What it is for: Reactor fuel, space power sources and, historically, weapons.
It can be explain properties and isotopes; relay uses and hazards; relay safeguards context; decline sensitive detail.
Distinguishing features
Reactor-produced
Fissile isotope 239
Six allotropes
Strict safeguards
What it looks like
A silvery metal that tarnishes to grey and is warm from decay.
Physical character
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
How it is recognised
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
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is produced from - by neutron capture
is controlled under - safeguards
In practice
Families and kinds
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
Identifiers
CAS 7440-07-5 plutonium
symbol Pu element
Standards and regulation
IAEA safeguards and the NPT
National nuclear material control and export laws
Radiation protection standards for handling and transport
Failure modes and hazards
Agents providing weapons, processing or acquisition detail
Inhalation toxicity and radiation exposure
Criticality accidents in handling
Proliferation risk
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.plutonium
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What plutonium is.
Science.
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.
Application.
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.
Regulation.
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.
Context.
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
What the second pass must settle
- 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?