战略与国际研究中心-Radiological-Weapons-as-Means-of-Attack_7页_98kb

Radiological Weapons as Means of Attack Summary

Core Content

Radiological weapons are primarily used for terrorist, political, and area denial purposes, rather than for mass casualties. These weapons spread radioactive materials, which can contaminate personnel, equipment, facilities, and the environment, leading to harmful or fatal exposure over time.

Types of Radiation and Their Effects

Radiation can be categorized into three main types of injuries:

1. External irradiation: Exposure to penetrating radiation from an external source, such as gamma rays. This does not make a person radioactive, and the individual can be treated as a regular patient.
2. Contamination with radioactive materials: Radioactive substances in the form of gases, liquids, or solids are released into the environment and may be absorbed through the skin, lungs, or digestive system.
3. Incorporation into body cells: Radioactive materials are taken up by cells, tissues, and organs (e.g., thyroid, bone, liver) and can cause long-term damage. This can only occur after contamination.

Radiation can be electromagnetic (e.g., gamma rays, X-rays) or particulate (e.g., alpha and beta particles). Gamma radiation is the most dangerous form of external exposure due to its ability to penetrate through materials and travel long distances.

Radiological Dispersal Devices (RDDs)

RDDs are explosive devices used to spread radioactive materials. They can be:

• Simple RDDs: Disseminating radioactive material without an explosive.
• "Dirty bombs": Using an explosive to spread radioactive material, either through passive means (aerosol) or active means (explosion).

Common sources of radioactive material for RDDs include:

• Hospital radiation therapy (e.g., Iodine-125, Cobalt-60)
• Radiopharmaceuticals (e.g., Iodine-131, Technetium-99)
• Nuclear power plant fuel rods (e.g., Uranium-235)
• Research and industrial facilities (e.g., Cesium-137, Iridium-192)

These materials can be delivered through various methods, including:

• Human agents
• Destruction of facilities
• Explosive devices
• Contaminating food, water, or livestock

Effectiveness and Challenges

• Effectiveness: The effectiveness of radiological weapons is controversial. They are not designed to cause mass casualties but can create intimidation and disruption.
• Casualties: The number of casualties depends on the dose of radiation and the duration of exposure. Chronic exposure is more likely to cause long-term health effects like cancer.
• Detection and Decontamination:
  • Gamma radiation is detectable with survey instruments and dosimeters.
  • Alpha and beta radiation may be harder to detect, especially if shielded.
  • Decontamination is effective if external agents are removed quickly, but internal contamination requires more complex medical treatment.
  • Post-attack surveys are difficult due to the long-term nature of radiation decay and the variability of isotopes.

Practical Risks and Concerns

• Terrorist Use: While theft of nuclear devices is unlikely, RDDs are considered a more realistic threat due to their availability and ease of handling.
• Material Availability: As more countries develop nuclear power programs, the availability of radioactive materials is expected to increase.
• Response Limitations:
  • Triage and medical treatment are not well-defined in current response literature.
  • Psychological impact is often overlooked, even in military medical handbooks.
  • Environmental contamination (e.g., water, food, soil) is a major concern but underestimated in most impact assessments.

Conclusion

Radiological weapons, particularly RDDs, pose serious psychological and political threats rather than direct mass casualties. Their use is difficult due to the handling, storage, and dissemination of radioactive materials. While decontamination is possible in the short term, long-term effects like cancer and environmental contamination remain uncertain and under-researched. The response to such attacks requires more comprehensive planning, including detection systems, triage protocols, and environmental monitoring.