Contamination & surveys
Wipe testing, direct frisking, skin contamination screening worksheets, and basic gross−background survey statistics. Physics lives in lib/physics/contamination.ts; exports use the contaminationReport extension on the shared report payload.
Help: /help/contamination · Tab hashes: #wipe, #direct-frisk, #skin-screening, #survey-statistics (legacy #frisk / #skin still open the same tabs)
Data audit & export readiness
Enter valid inputs on this tab to populate the audit snapshot.
Roadmap: contamination & surveys. Training Academy: /training — domain-specific Training Academy scenarios may grow over time; general modules already cover fundamentals.
Active: #wipe · Wipe test (removable contamination)
Removable contamination (wipe)
Enter gross and background as cpm, or as counts with live time (seconds).
Results
- Gross cpm
- 120.000
- Background cpm
- 40.0000
- Net cpm
- 80.0000
- dpm
- 320.000
- dpm / 100 cm²
- 320.000
- Declared wipe efficiency is treated as a single scalar; nuclide-specific counting efficiency, removable vs fixed partitioning, and energy-dependent response are not modeled.
- Nonuniform activity across the wiped template can bias dpm/100 cm² versus the nominal wiped area assumption.
net cpm = gross cpm − background cpm; dpm = net cpm / efficiency; dpm/100 cm² = dpm × (100 / wiped area cm²) ÷ geometry correction (default 1).