References

NDT glossary

Thirty field terms with their German and French equivalents. Definitions are written here in one sentence, so they work on site or in a report.

NDT glossary
Français	Deutsch	English	Definition
CND — contrôle non destructif	ZfP — zerstörungsfreie Prüfung	NDT — non-destructive testing	Examining a part or structure without destroying it, to find defects.
Radiographie industrielle	Industrielle Radiographie	Industrial radiography	Imaging with X- or gamma rays that pass through the material and expose a detector.
Gammagraphie	Gammagraphie	Gamma radiography	Radiography using a sealed radioactive source (Ir-192, Se-75, Co-60) instead of a tube.
Radiographie X	Röntgenprüfung	X-ray radiography	Radiography from an electrical generator, whose emission stops when switched off.
Film radiographique	Röntgenfilm	Radiographic film	Radiation-sensitive emulsion, chemically developed to reveal the internal image.
Densité optique	optische Dichte	Optical density	Film blackening after development; it is what the exposure time targets.
IQI — indicateur de qualité d’image	Bildgüteprüfkörper	IQI — image quality indicator	Reference object placed on the part to prove the sensitivity of the resulting image.
Flou géométrique (Ug)	geometrische Unschärfe	Geometric unsharpness	Loss of sharpness caused by focal spot size and source-object-film geometry.
DSO — distance source-objet	Fokus-Objekt-Abstand	Source-to-object distance	Distance from the focal spot to the part face turned towards the source.
DSF — distance source-film	Fokus-Film-Abstand	Source-to-film distance	Distance from focal spot to film; it drives the dose rate reaching the detector.
CDA — couche de demi-atténuation	Halbwertsschicht	Half-value layer	Material thickness that halves the dose rate of a beam.
Activité	Aktivität	Activity	Number of disintegrations per second of a source, expressed in becquerels.
Becquerel	Becquerel	Becquerel	SI unit of activity: one disintegration per second.
Curie	Curie	Curie	Older activity unit equal to 3.7 × 10¹⁰ Bq; still used on source certificates.
Constante gamma	Gammakonstante	Gamma-ray constant	Dose rate produced by a given activity at one metre, specific to each isotope.
Débit de dose	Dosisleistung	Dose rate	Dose per unit time; the quantity a survey meter measures for zoning.
Dose absorbée	Energiedosis	Absorbed dose	Energy deposited per unit mass, in gray; it describes the physical effect.
Dose équivalente	Äquivalentdosis	Equivalent dose	Absorbed dose weighted by radiation type, in sievert; it describes the risk.
Sievert	Sievert	Sievert	SI unit of equivalent and effective dose.
Zone surveillée	Überwachungsbereich	Supervised area	Area where exposure stays low but must be monitored and signposted.
Zone contrôlée	Kontrollbereich	Controlled area	Area where exposure may exceed public limits; access is controlled and marked.
Balisage	Absperrung	Barriering	Physical boundary and signage of the area where dose rate exceeds a threshold.
Collimateur	Kollimator	Collimator	Device that narrows the beam; it strongly reduces the on-axis dose rate.
Source scellée	umschlossene radioaktive Stoffe	Sealed source	Radioactive source enclosed tightly, handled without contact with the material.
Ir-192 — iridium 192	Iridium-192	Ir-192 — iridium-192	Common gamma radiography isotope, half-life around 74 days; it needs close tracking.
Se-75 — sélénium 75	Selen-75	Se-75 — selenium-75	Lower-energy isotope suited to thin sections; half-life around 120 days.
Co-60 — cobalt 60	Cobalt-60	Co-60 — cobalt-60	Highly penetrating isotope for thick sections; half-life around 5.3 years.
PCR — personne chargée de la radioprotection	Strahlenschutzbeauftragter	Radiation protection officer	Person appointed by the establishment to ensure radiation protection rules are followed.
ERP — expert en radioprotection	Sachverständiger für Strahlenschutz	Radiation protection expert	External expert who advises the establishment and takes part in checks and acceptance testing.
Dosimétrie individuelle	Personendosimetrie	Individual dosimetry	Measurement of a worker dose, recorded on a named dosimeter.

Definitions are deliberately short and operational. For a normative definition, refer to the applicable standards and to the text of your authorisation.