MODULE 01 — FOUNDATION
CBRN DEFENSE — PRINCIPLES & SCOPE
Comprehensive guide to Chemical, Biological, Radiological, and Nuclear defense — covering threat characterization, detection technologies, personal protection, decontamination protocols, and medical countermeasures for first responders, military, and homeland security professionals.
⚠️
This training guide covers CBRN defense fundamentals for protective and response purposes only. All information is unclassified and drawn from open-source defense doctrine. Handle with appropriate operational security awareness.
45+
CHEMICAL AGENTS
18
BIO THREAT AGENTS
1600+
RADIOACTIVE ISOTOPES
9
NUCLEAR STATES
CBRN THREAT SPECTRUM
- CHEMICAL — Nerve agents, blister agents, blood agents, choking agents, incapacitants
- BIOLOGICAL — Bacteria, viruses, toxins, rickettsia — weaponized or natural pandemic
- RADIOLOGICAL — Dirty bombs (RDD), orphan sources, nuclear facility accidents
- NUCLEAR — IND, state weapon detonation, EMP effects, fallout patterns
CBRN DOCTRINE FRAMEWORK
- AVOID — Detect and warn early; maneuver away from hazard
- PROTECT — Collective and individual protective equipment
- DECONTAMINATE — Remove, neutralize, and verify clean
- SUSTAIN — Maintain operations during and after CBRN event
- RESTORE — Medical treatment and return to full capability
HISTORICAL CBRN EVENTS
| YEAR | EVENT | AGENT TYPE | CASUALTIES | LESSON LEARNED |
|---|---|---|---|---|
| 1995 | Tokyo Subway — Aum Shinrikyo | CHEM Sarin | 13 killed, 5,800 exposed | Civilian first responders need CBRN training |
| 2001 | US Anthrax Letters | BIO Anthrax spores | 5 killed, 17 infected | Mail screening and biosurveillance gaps |
| 1986 | Chernobyl Reactor Accident | RAD Mixed fission products | 31 acute, thousands latent | Evacuation timing and iodine prophylaxis critical |
| 2013 | Ghouta, Syria | CHEM Sarin | 1,400+ killed | Attribution and international response mechanisms |
| 2006 | Litvinenko Poisoning | RAD Po-210 | 1 killed | State-sponsored radiological assassination |
| 2018 | Salisbury, UK — Novichok | CHEM Nerve agent | 1 killed, 3 seriously ill | Secondary exposure risk; scene decon requirements |
MODULE 02 — THREAT COMPARISON
CBRN THREAT COMPARISON
Comparative analysis of CBRN threat categories across key operational parameters — lethality, persistence, detectability, and delivery complexity.
COMPARATIVE THREAT MATRIX
THREAT PARAMETER COMPARISON
| PARAMETER | CHEM | BIO | RAD | NUC |
|---|---|---|---|---|
| Mass Casualty Potential | HIGH | EXTREME | MEDIUM | EXTREME |
| Production Difficulty | MEDIUM | MEDIUM | LOW | VERY HIGH |
| Environmental Persistence | HRS–DAYS | HRS–YEARS | HRS–DECADES | YEARS |
| Detection Lead Time | MINUTES | DAYS | SECONDS | SECONDS |
| Decontamination Complexity | MEDIUM | HIGH | HIGH | EXTREME |
| Medical Countermeasures | PARTIAL | PARTIAL | SUPPORTIVE | SUPPORTIVE |
| Contagion Risk | NONE | HIGH | NONE | NONE |
| State Actor Probability | HIGH | MEDIUM | MEDIUM | HIGH |
RESPONSE TIMELINE COMPARISON
Chemical — Symptom onsetSeconds–Minutes
Biological — Incubation periodHours–Days
Radiological — Acute effectsHours–Weeks
Nuclear — Blast immediateMilliseconds
DETECTION COMPLEXITY
Chemical agents75%
Biological agents40%
Radiological sources88%
Nuclear devices92%
MODULE 03 — CHEMICAL AGENTS
CHEMICAL THREAT AGENTS
Classification, properties, and tactical characteristics of chemical warfare agents (CWA) and toxic industrial chemicals (TIC) across all agent families.
ALL AGENTS
NERVE
BLISTER
BLOOD
CHOKING
INCAPACITANTS
MODULE 04 — PHYSIOLOGICAL EFFECTS
CHEMICAL AGENT — PHYSIOLOGICAL EFFECTS
Mechanism of action, clinical signs, symptom progression timelines, and organ system impacts by agent class.
NERVE AGENT — MECHANISM OF ACTION
⚠️Nerve agents inhibit acetylcholinesterase (AChE), causing accumulation of acetylcholine at nerve synapses — leading to continuous nerve firing and eventual respiratory failure.
SLUDGEM SYNDROME (Muscarinic)
- Salivation — excessive drooling
- Lacrimation — excessive tearing
- Urination — loss of bladder control
- Defecation / Diarrhea
- Gastrointestinal distress
- Emesis — vomiting
- Miosis — pinpoint pupils
NICOTINIC EFFECTS (Motor)
- Muscle fasciculations / tremors
- Weakness progressing to paralysis
- Tachycardia (initial), then bradycardia
- Hypertension
- Respiratory muscle failure
- Seizures (CNS penetration)
- Loss of consciousness / coma
SYMPTOM PROGRESSION TIMELINE — VAPOR EXPOSURE
0–30 SEC
Initial Contact
Rhinorrhea, miosis, mild lacrimation. Headache. Eye pain.
30 SEC – 2 MIN
Early Systemic Effects
Bronchoconstriction, dyspnea, chest tightness. Nausea begins. Increased secretions.
2–5 MIN
Severe Toxidrome
Convulsions, loss of consciousness, massive secretions, cyanosis, respiratory arrest without treatment.
5–10 MIN
Potentially Fatal
Death by asphyxiation if antidote not administered. Brain hypoxia begins at ~4 min.
BLISTER AGENT EFFECTS
- Vesicants cause DNA alkylation — cells cannot replicate
- Skin: erythema → blisters → necrosis (delayed 2–24 hrs for mustard)
- Eyes: severe conjunctivitis, photophobia, blindness risk
- Respiratory: pseudomembrane formation, airway necrosis
- Lewisite: immediate burning pain (vs mustard — painless initially)
- Systemic mustard: bone marrow suppression, immunosuppression
BLOOD / CHOKING AGENTS
- Blood agents (HCN, CK): bind cytochrome oxidase → cellular hypoxia despite normal O₂
- Rapid: confusion → convulsions → cardiac arrest within minutes
- Bitter almond odor (unreliable detector — genetic anosmia common)
- Choking agents (Cl₂, phosgene): pulmonary edema → delayed respiratory failure
- Phosgene: no immediate symptoms; pulmonary edema 4–24 hrs later
- Chlorine: immediate irritation, detectable odor, less lethal
MODULE 05 — BIOLOGICAL AGENTS
BIOLOGICAL THREAT AGENTS
CDC/USAMRIID Category A–C biological threat agents — pathogens and toxins with potential for weaponization, mass casualties, or severe public health impact.
🦠Category A agents pose the highest risk — easily disseminated, high mortality, require special public health preparedness. Person-to-person transmission possible for some agents.
CDC CATEGORY A — HIGHEST PRIORITY
| AGENT | TYPE | ROUTE | INCUBATION | MORTALITY (UNTREATED) | CONTAGIOUS |
|---|---|---|---|---|---|
| Anthrax (B. anthracis) | Bacteria | Inhalation/Cutaneous | 1–5 days | 80–90% (inhalation) | NO |
| Smallpox (Variola) | Virus | Respiratory droplets | 7–17 days | 30% | YES — HIGH |
| Plague (Y. pestis) | Bacteria | Inhalation/Flea bite | 1–6 days | ~100% pneumonic | YES (pneumonic) |
| Botulinum Toxin | Toxin | Ingestion/Inhalation | 12–72 hrs | 5–10% (treated) | NO |
| Tularemia (F. tularensis) | Bacteria | Inhalation/Contact | 3–5 days | 30–60% (untreated) | NO |
| Viral Hemorrhagic Fevers | Virus | Contact/Droplet | 2–21 days | 25–90% (varies) | YES |
CATEGORY B AGENTS
- Brucellosis (Brucella spp.) — Febrile illness, 5% mortality
- Q Fever (C. burnetii) — Inhalation, mild to severe pneumonia
- Ricin toxin — Cell death, no antidote; 1–3 day onset
- Epsilon toxin (C. perfringens) — GI / neurological effects
- Glanders (B. mallei) — Zoonotic, severe if inhaled
- Typhus fever (R. prowazekii) — Louse-borne, 10–40% untreated
- Viral encephalitides (VEE, EEE, WEE) — Neurological damage
- Food/water safety threats: Salmonella, E. coli O157:H7
WEAPONIZATION CHARACTERISTICS
- Particle size — 1–5 µm optimal for deep lung deposition (alveolar)
- Stability — Agents must survive UV, desiccation, temperature extremes
- Infectious dose — ID₅₀ as low as 1–10 organisms (anthrax spores)
- Aerosolization — Most effective delivery; spray or explosive dispersal
- Antibiotic resistance — Engineered resistance is a significant concern
- Silent release — No immediate indication; delayed recognition critical failure point
MODULE 06 — TRANSMISSION & SPREAD
BIOLOGICAL TRANSMISSION & SPREAD
Epidemiological modeling, R₀ values, transmission routes, and outbreak detection indicators for weaponized biological agents.
EPIDEMIC CURVE SIMULATOR
R₀ (Basic Repro. No.)4.0
Initial Exposed10
Incubation (days)5
Infectious Period (days)7
Intervention Day14
R₀ REFERENCE VALUES
| AGENT | R₀ RANGE | CLASSIFICATION |
|---|---|---|
| Smallpox (weaponized) | 5–7 | EXTREME |
| Pneumonic Plague | 1.3–3.2 | HIGH |
| Influenza (pandemic) | 2–4 | MODERATE |
| Ebola (dense setting) | 1.5–2.5 | HIGH |
| Anthrax (inhalation) | N/A | NON-CONTAGIOUS |
| Botulinum Toxin | N/A | NON-CONTAGIOUS |
| Tularemia | N/A | NOT TRANSMISSIBLE |
OUTBREAK DETECTION INDICATORS
- Unusual cluster of pneumonia or febrile illness — rapid onset
- Disease in multiple geographically separate locations simultaneously
- Unusually high attack rate in healthy adults
- Unusual aerosol, liquid, or powder device found in area
- Atypical drug resistance patterns in pathogen identification
- Animal deaths preceding human illness (zoonotic agents)
- Epidemiological link to a common exposure event
- Disease not endemic to the affected geographic area
MODULE 07 — RADIOLOGICAL FUNDAMENTALS
RADIATION FUNDAMENTALS
Types of ionizing radiation, penetrating power, detection principles, and radiological dispersal device (RDD) threat characteristics.
☢️Time–Distance–Shielding: The three universal principles of radiation protection. Minimize time in radiation field, maximize distance from source, interpose shielding material between source and personnel.
RADIATION TYPES — PROPERTIES & SHIELDING
| TYPE | SYMBOL | CHARGE | RANGE IN AIR | PENETRATION | SHIELDING | INTERNAL HAZARD |
|---|---|---|---|---|---|---|
| Alpha | α | +2 | ~4 cm | LOW | Paper / skin | EXTREME (if inhaled) |
| Beta | β | -1 | ~3 m | MEDIUM | Plastic / aluminum | HIGH (burns, thyroid) |
| Gamma | γ | 0 | 100s of meters | HIGH | Lead / concrete / earth | MODERATE |
| Neutron | n | 0 | 100s of meters | EXTREME | Water / polyethylene / boron | EXTREME (activation) |
| X-Ray | X | 0 | 100s of meters | HIGH | Lead / concrete | MODERATE |
KEY RADIOLOGICAL TERMS
- Activity — Rate of radioactive decay; measured in Becquerels (Bq) or Curie (Ci)
- Absorbed Dose — Energy deposited per unit mass; Grays (Gy) or rad
- Equivalent Dose — Biological damage weighting; Sieverts (Sv) or rem
- Effective Dose — Whole-body risk equivalent; used for dose limits
- Half-life — Time for 50% of atoms to decay; ranges from microseconds to billions of years
- Dose Rate — Dose per unit time (mSv/hr); determines urgency of evacuation
RDD (DIRTY BOMB) THREAT
- Conventional explosive disperses radioactive material — NOT a nuclear weapon
- Primary casualties from blast, not radiation (in most scenarios)
- Psychological and economic impact can far exceed physical harm
- Most likely isotopes: Cs-137, Co-60, Sr-90, Am-241, Ir-192
- Contamination zone may require evacuation and remediation
- Orphan sources (lost/abandoned) are more likely than state-grade material
- IAEA database tracks 3,600+ incidents of nuclear/radiological material out of regulatory control
MODULE 08 — DOSE & HEALTH EFFECTS
RADIATION DOSE & HEALTH EFFECTS
Acute Radiation Syndrome (ARS) progression, dose thresholds, dose-rate effects, and long-term stochastic health risks.
ACUTE RADIATION SYNDROME — DOSE THRESHOLDS
Background (annual)~3 mSv/yr
Occupational limit (annual)20 mSv/yr
Emergency worker limit100 mSv
Mild ARS threshold~1 Sv
Moderate ARS (bone marrow)2–4 Sv
Severe ARS4–6 Sv
LD₅₀/₃₀ (50% death, 30 days)~4.5 Sv
Gastrointestinal ARS6–10 Sv
Cardiovascular / CNS ARS>10 Sv
Almost certainly fatal>15 Sv
ARS PHASES
0–48 HRS
Prodromal Phase
Nausea, vomiting, diarrhea, fatigue. Severity indicates dose received. Spontaneous lymphocyte depletion begins.
2 HRS – 3 WKS
Latent Phase
Apparent recovery. Patient feels improved. Bone marrow suppression continues silently. Duration inversely proportional to dose.
WKS 2–8
Manifest Illness Phase
Infection, hemorrhage, hair loss. Sepsis risk. GI: mucosal breakdown, bloody diarrhea. CNS: confusion, seizures (high doses).
WKS 6–12
Recovery or Death
Bone marrow recovery begins if sub-lethal dose. Death from infection or hemorrhage if above LD₅₀. Long-term cancer risk elevated.
BIODOSIMETRY — DOSE ESTIMATION
- Time to vomiting — <1 hr: >2 Sv; 1–2 hrs: ~1–2 Sv; >4 hrs: <1 Sv
- Absolute lymphocyte count (ALC) — 24 hr depletion correlates with dose (<1000/µL = significant ARS)
- Dicentric chromosome assay — Gold standard; 24–48 hr turnaround
- γ-H2AX assay — DNA double-strand break marker; rapid (<4 hrs)
- Neutron activation — Na-24 in blood from high-energy neutron exposure
- AFRRI BIODOSIMETRY TOOLS — Automated radiation assessment
MODULE 09 — NUCLEAR THREATS
NUCLEAR THREAT LANDSCAPE
Nuclear weapon types, improvised nuclear devices (IND), nuclear state inventories, and proliferation risk pathways.
💥Nuclear weapons represent the highest CBRN threat tier — mass destruction capability, long-term environmental contamination, and societal disruption far beyond conventional weapon effects.
NUCLEAR DEVICE TYPES
- Gun-type fission — Simpler; U-235 sub-critical masses driven together; Little Boy design
- Implosion fission — Pu-239 compressed by shaped explosive lenses; Fat Man design
- Boosted fission — D-T gas injection amplifies fission yield
- Thermonuclear (H-Bomb) — Fission primary triggers fusion secondary; multi-megaton yield
- Enhanced radiation (ER) — Neutron bomb; maximizes radiation, minimizes blast
- Improvised Nuclear Device (IND) — Non-state actor assembled device; likely crude gun-type; kiloton range
- Radiological Dispersal Device (RDD) — Dirty bomb; conventional explosive + radioactive material
CRITICAL MASS REFERENCE
- U-235 bare sphere — ~52 kg critical mass (unreflected)
- Pu-239 bare sphere — ~10 kg critical mass (unreflected)
- Reflected cores — Beryllium or natural uranium reduces mass by 60–70%
- HEU threshold — Highly Enriched Uranium: >20% U-235 (weapons-grade >90%)
- RDD material — Cs-137, Co-60, Ir-192, Sr-90, Am-241 (industrial sources)
- IAEA safeguards cover all declared material; undeclared material is primary proliferation concern
NUCLEAR-ARMED STATES — STATUS
| STATE | WARHEADS (EST.) | DELIVERY SYSTEMS | TREATY STATUS |
|---|---|---|---|
| United States | ~5,500 | ICBM, SLBM, B61/B83 bombs | NPT (NWS) |
| Russia | ~6,200 | ICBM, SLBM, cruise missiles | NPT (NWS) |
| China | ~350 (expanding) | DF-series ICBM, SLBM, bombers | NPT (NWS) |
| France | ~290 | SLBM, ASMP-A cruise missile | NPT (NWS) |
| UK | ~225 | Trident SLBM only | NPT (NWS) |
| Pakistan | ~165 | SRBM, MRBM, aircraft | Non-NPT |
| India | ~160 | AGNI IRBM, aircraft, SLBM (dev) | Non-NPT |
| Israel | ~90 (assumed) | Jericho MRBM, aircraft, submarine | Non-NPT (ambiguous) |
| North Korea | ~40–50 | ICBM (Hwasong), MRBM | NPT withdrawal 2003 |
MODULE 10 — NUCLEAR WEAPON EFFECTS
NUCLEAR WEAPON EFFECTS
Five primary weapon effects: blast, thermal, initial radiation, EMP, and fallout — with scaled radii and country outline overlays for geographic context.
NUCLEAR EFFECTS CALCULATOR
YIELD (kilotons)15 kt
BURST HEIGHT (m)0 m
YIELD PRESETS
EFFECT LAYERS
COUNTRY OUTLINE OVERLAY — to scale
ZOOM & PAN
ZOOM:
1.0×
Scroll · Drag · Pinch
EFFECT ENERGY DISTRIBUTION
Blast / Overpressure~50%
Thermal Radiation (heat)~35%
Initial Nuclear Radiation~5%
Residual Radiation (fallout)~10%
EMP EFFECTS
- E1 component — <1 µs; destroys unshielded electronics via induced current spikes
- E2 component — Similar to lightning; surge protectors partially effective
- E3 component — 10–100s sec; geomagnetic disturbance; damages power grid transformers
- High-altitude detonation (HEMP): single airburst at 400 km can cover continental US
- Critical infrastructure (power, comms, finance) all at risk
- Faraday cages and EMP-hardened facilities provide protection
MODULE 11 — DETECTION SYSTEMS
CBRN DETECTION SYSTEMS
Sensor technologies, detection modalities, response times, and military/civilian detection equipment across all CBRN hazard types.
ALL SYSTEMS
CHEMICAL
BIOLOGICAL
RAD/NUC
MODULE 12 — ATTACK INDICATORS
CBRN ATTACK INDICATORS
Observable indicators of CBRN attack or release — environmental, human, and device indicators for first responder recognition.
🔍First responders must treat any unknown mass casualty event with CBRN potential until proven otherwise. Approach from upwind/uphill; do not rush in without PPE assessment.
CHEMICAL ATTACK INDICATORS
- Multiple casualties with similar rapid-onset symptoms
- Unusual odors — garlic/horseradish (mustard), almonds (HCN), new mown hay (phosgene)
- Oily droplets on surfaces; unexplained liquid sprays
- Excessive secretions: tearing, salivation, runny nose in crowds
- Pinpoint pupils (miosis) in multiple victims
- Dead animals, birds falling in affected area
- Abandoned spray devices, munition casings, dissemination equipment
- Victims removing clothing spontaneously (skin burning)
BIOLOGICAL ATTACK INDICATORS
- Unexplained aerosol sprayers, especially at night or early morning
- Unusual number of insects (vector delivery device)
- Unexplained powder or liquid in correspondence/packages
- Sudden simultaneous illness across large geographic area
- Rare disease presenting in unexpected population
- Higher-than-expected disease severity or drug resistance
- Reverse epidemiology: disease appears without usual risk factors
- Unusual patterns: time of year, route of exposure inconsistency
RADIOLOGICAL INDICATORS
- Radiation portal monitor alarms at checkpoints
- Unexplained illness: nausea, hair loss, skin burns without obvious cause
- Shielded container — heavy lead box, unusual device
- Abandoned medical or industrial radioactive source
- Unexplained explosion with no apparent chemical cause
- Casualty clusters near specific object/location
- Civilian dosimeter alarms or survey meter deflections
- Dead animals or vegetation in a localized area
NUCLEAR / IND INDICATORS
- Extremely bright flash visible at great distance
- Mushroom cloud or distinctive fireball
- Massive destruction, crater at ground zero
- EMP effects: vehicles, electronics fail simultaneously
- Intense heat wave followed by massive pressure wave
- Seismic detection (CTBTO IMS network)
- Intelligence reporting of material theft or device construction
- Radiation anomaly + conventional explosive residue
MODULE 13 — PERSONAL PROTECTIVE EQUIPMENT
PPE LEVELS & SELECTION
EPA/OSHA PPE Level A–D system, military MOPP levels, selection criteria, donning sequence, and limitations for CBRN environments.
MILITARY MOPP LEVELS
| MOPP LEVEL | MASK | OVERGARMENT | GLOVES | BOOTS | WORK RATE IMPACT |
|---|---|---|---|---|---|
| MOPP 0 | Carried | Carried | Carried | Standard | 0% |
| MOPP 1 | Carried | Worn | Carried | Standard | ~5% |
| MOPP 2 | Carried | Worn | Carried | MOPP boots | ~10% |
| MOPP 3 | Worn | Worn | Carried | MOPP boots | ~25% |
| MOPP 4 | Worn | Worn | Worn | MOPP boots | 40–60% |
PPE DONNING SEQUENCE (LEVEL A)
STEP 1
Buddy check & briefing
Verify all components present; review entry/exit plan; assign buddy pairs.
STEP 2
Inner gloves & cooling (if required)
Cotton/nitrile inner gloves; cooling vest if high heat environment.
STEP 3
SCBA don and check
Put on SCBA; check air supply (min 20 min); pressure test mask seal.
STEP 4
Fully encapsulating suit
Step into suit with buddy assistance; route SCBA through suit; zip and seal.
STEP 5
Outer gloves & boots
Chemical-resistant outer gloves taped at wrist; boot covers over suit.
STEP 6
Final buddy check
Verify all seals, zippers, connections. Log entry time. Communicate air supply limit.
HEAT STRESS & DURATION LIMITS
🌡️Level A PPE dramatically reduces heat dissipation. Heat stress is the primary cause of PPE-related casualties during incident response.
| AMBIENT TEMP | LEVEL A LIMIT | LEVEL B LIMIT | LEVEL C LIMIT |
|---|---|---|---|
| <10°C (50°F) | >3 hrs | >4 hrs | Unrestricted |
| 21°C (70°F) | ~60 min | ~90 min | ~3 hrs |
| 32°C (90°F) | ~30 min | ~45 min | ~60 min |
| >38°C (100°F) | ~20 min | ~30 min | ~45 min |
MODULE 14 — SHELTER-IN-PLACE
SHELTER-IN-PLACE PROTOCOLS
Decision criteria, effectiveness factors, and procedural guidance for shelter-in-place as a protective action during CBRN events.
SHELTER VS EVACUATE DECISION
| FACTOR | SHELTER PREFERRED | EVACUATE PREFERRED |
|---|---|---|
| Event duration | <4–6 hours | Long-term/persistent |
| Weather | Low wind speed | Wind shifting toward shelter |
| Building type | Masonry/concrete | Mobile homes / trailers |
| Agent type | Chemical vapor | Radiological fallout (long-term) |
| Exposure time | Plume passes quickly | Contamination area expanding |
| Road conditions | Evacuation routes blocked | Clear routes available |
SHELTER EFFECTIVENESS FACTORS
Sealed concrete building90%
Brick building (sealed)80%
Wood-frame house (sealed)60%
Wood-frame house (normal)30%
Automobile (windows closed)25%
Tent / outdoor cover5%
SHELTER-IN-PLACE PROCEDURE
- Immediately go inside; close all doors and windows
- Turn off HVAC, fans, and ventilation — seal with duct tape if available
- Go to interior room, above ground floor (for denser-than-air vapors, go higher)
- Use wet towels to seal door gaps; plastic sheeting over windows
- Tune to emergency broadcast (EAS) for official guidance
- Avoid telephone lines (keep clear for emergency services)
- Do not use elevators during emergency
- Account for all personnel; record names and condition
- Monitor air quality / symptoms; if inside contaminated, evacuate immediately
- Do not break shelter until official all-clear is issued
- Nuclear fallout: shelter 24–48 hrs reduces dose by 80–90% for most fallout
- Potassium Iodide (KI) if radioiodine release confirmed
MODULE 15 — DISPERSION MODELING
HAZARD DISPERSION MODELING
Gaussian plume model with geographic city overlay — showing real-scale hazard footprint on urban terrain. Adjust meteorological parameters to see how agent cloud evolves downwind.
GAUSSIAN PLUME SIMULATOR — GEOGRAPHIC OVERLAY
METEOROLOGICAL PARAMETERS
Wind Speed (m/s)5
Wind Direction (°)W
Stability ClassC
Source Height (m)0
Source Strength (Q)30
CITY / LOCATION OVERLAY
AGENT TYPE
■ IDLH zone
■ Injury zone
■ Discomfort zone
■ Detectable
→ Wind direction
ℹ️Simplified Gaussian model for training visualization. Real operations use CAMEO/ALOHA, HPAC, or NARAC with live MET data. City street grids are schematic — not exact GIS data.
PASQUILL-GIFFORD STABILITY CLASSES
| CLASS | CONDITIONS | DISPERSION | HAZARD ZONE |
|---|---|---|---|
| A (Very Unstable) | Strong sun, low wind | Rapid vertical spread | Smallest |
| B (Unstable) | Moderate sun, <4 m/s | Good vertical mixing | Small |
| C (Slightly Unstable) | Slight instability | Moderate mixing | Moderate |
| D (Neutral) | Overcast, any wind | Limited mixing | Moderate-large |
| E (Slightly Stable) | Clear, <6 m/s night | Poor mixing | Large |
| F (Stable) | Clear, low wind night | Very poor mixing | Largest — most dangerous |
OPERATIONAL DISPERSION TOOLS
- CAMEO/ALOHA — EPA/NOAA chemical plume tool for first responders; free civilian tool
- HPAC — Hazard Prediction and Assessment Capability; DoD military tool
- NARAC — National Atmospheric Release Advisory Center; nuclear/radiological specialist
- D2PC / CASPER — Chemical Agent Plume Estimation for Response; tactical military
- WebEOC / CHEMTREC — Emergency response coordination and chemical data
- All operational models require current MET data: wind speed, direction, stability, temperature, humidity
MODULE 16 — DECONTAMINATION
DECONTAMINATION PROTOCOLS
Immediate, operational, and thorough decontamination procedures for personnel, equipment, and facilities across all CBRN hazard types.
🚿Golden rule of decon: The faster contamination is removed, the better the outcome. M8 paper + immediate action beats hospital decon by 30+ minutes. Immediate decon within 1 minute can reduce absorption by 80%.
☣️ HOT ZONE
Immediately dangerous to life and health (IDLH). Contamination source. Level A/B PPE required. ENTRY = trained responders only.
⚠️ WARM ZONE
Decontamination corridor. Reduction of contamination transfer. Level B/C PPE. Casualties processed through decon line here.
✅ COLD ZONE
Safe zone. Medical treatment. No PPE required beyond standard precautions. Command post, staging, media.
MASS CASUALTY DECON LINE
STATION 1
Triage & Emergency Treatment
Life-saving interventions only. Antidotes (atropine, 2-PAM) before decon if nerve agent. Remove patient from source.
STATION 2
Clothing Removal
Remove and bag all clothing and jewelry — eliminates ~80% of contamination. Preserve evidence chain.
STATION 3
Rinse
Large volume tepid water flush — head to toe. 3–5 min minimum. Do NOT scrub (drives contamination deeper).
STATION 4
Soap & Rinse
Dilute soap wash (pH neutral). Rinse thoroughly. Special attention to eyes, groin, underarms, wounds.
STATION 5
Verification & Drying
Survey with appropriate detector. Dry with clean towels. Wrap in blanket. Transfer to cold zone for medical treatment.
AGENT-SPECIFIC DECON METHODS
| AGENT | PRIMARY DECON | NOTES |
|---|---|---|
| Nerve agents (G/V) | Soap + water; M291 kit | Avoid bleach — activates some agents; antidote first |
| Mustard (HD) | Soap + water; M291 kit | Delayed; blot do not rub; bleach (0.5%) for surfaces |
| Lewisite | Soap + water; BAL antidote | British Anti-Lewisite (BAL) topical for skin |
| Biological | 0.5% hypochlorite; soap | Avoid aerosolizing during decon; full body wash |
| Radiological | Soap + water (remove particles) | Do NOT use bleach; survey to confirm decon; FRPG |
| Unknown | Water flush; clothing removal | Treat as most dangerous agent; confirm with detector |
MODULE 17 — MEDICAL COUNTERMEASURES
MEDICAL COUNTERMEASURES
Antidotes, prophylaxis, vaccines, and supportive care protocols for all CBRN agent categories. Strategic National Stockpile (SNS) assets and distribution frameworks.