ISO 8769-2020 PDF

Full title and description

ISO 8769:2020 — Measurement of radioactivity — Alpha-, beta- and photon emitting radionuclides — Reference measurement standard specifications for the calibration of surface contamination monitors. This International Standard specifies the characteristics and preferred reference radiations of reference measurement standards (large-area sources) used for calibration of surface contamination monitors, with emphasis on traceability to national measurement standards and on alpha, beta and photon emitters (photon energy ≤ 1.5 MeV).

Abstract

Specifies characteristics of reference measurement standards of radioactive surface contamination, expressed in terms of surface emission rate and activity where required, for the calibration of surface contamination monitors. Covers alpha-, beta- and photon-emitting radionuclides (photons of maximum energy not greater than 1.5 MeV). Does not prescribe calibration procedures (those are covered in related IEC documents); it also identifies preferred reference radiations and notes considerations for filtered photon standards.

General information

• Status: Published (International Standard); last reviewed and confirmed as current in 2025.
• Publication date: 22 June 2020.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 17.240 — Radiation measurements.
• Edition / version: Edition 4 (2020).
• Number of pages: 13 pages.

Scope

Defines the specification and preferred radiations for reference measurement standards (large-area sources) used to calibrate surface contamination monitors. Applies to alpha-emitters, beta-emitters and photon emitters where the emitted photons have maximum energy not greater than 1.5 MeV. The document addresses required characteristics, traceability to national measurement standards, and how reference radiations are to be specified (surface emission rate and/or activity). It explicitly does not describe the step-by-step calibration procedures for instruments (see IEC 60325, IEC 62363 and related procedural standards).

Key topics and requirements

• Specification of reference measurement standards for surface contamination in terms of surface emission rate and activity where applicable.
• Coverage of alpha, beta and photon emitting radionuclides (photons ≤ 1.5 MeV) and preferred reference radiations for calibration.
• Traceability requirements to national measurement standards and metrological characterization of large-area sources.
• Guidance on photon standards that include filters (photon energy ranges vs. specific radionuclide emission).
• Definition of quantities and units used for specifying sources (surface emission rate, activity per unit area) relevant to instrument response.

Typical use and users

Used by national metrology institutes, accredited calibration laboratories, instrument manufacturers (surface contamination monitors), radiation protection services, nuclear facility technical teams, regulators and standards bodies. Typical activities include producing and certifying reference sources, performing calibrations of contamination monitors, and establishing traceability chains for surface contamination measurements.

Related standards

Commonly used alongside procedural and instrument standards such as IEC 60325 and IEC 62363 (procedures for calibration and use of contamination monitors). ISO 8769 has earlier editions (2016, 2010, 1988) and is maintained by ISO/TC 85/SC 2 (Radiation protection and nuclear fuel cycle instrumentation). National/adopted versions and regional implementations (for example national adoptions) exist.

Keywords

surface contamination, calibration, reference measurement standard, reference source, large-area source, surface emission rate, activity per unit area, alpha emitter, beta emitter, photon emitter, radionuclide, traceability, radiation measurement, metrology.

FAQ

Q: What is this standard?

A: ISO 8769:2020 specifies the characteristics and preferred radiations of reference measurement standards (large-area sources) for calibrating surface contamination monitors used to detect alpha, beta and low-energy photon emissions.

Q: What does it cover?

A: It covers the properties, specification and metrological traceability of reference sources and reference radiations (expressed as surface emission rates and/or activity per unit area) for alpha, beta and photon emitters up to 1.5 MeV. It does not set out the calibration procedures for instruments.

Q: Who typically uses it?

A: National metrology institutes, accredited calibration laboratories, manufacturers of contamination monitors, radiation protection groups at nuclear facilities, and regulatory bodies overseeing radioactive contamination measurement and compliance.

Q: Is it current or superseded?

A: ISO 8769:2020 is the current International Standard edition (published 22 June 2020) and was reviewed and confirmed as current in 2025. Earlier editions (2016, 2010, 1988) have been withdrawn and superseded by the 2020 edition.

Q: Is it part of a series?

A: It is the ISO series for reference sources used in calibration of surface contamination monitors (successive editions of ISO 8769). It is associated with other standards and technical reports dealing with calibration procedures and instrument performance (for example IEC calibration procedure standards).

Q: What are the key keywords?

A: Surface contamination, reference source, large-area source, calibration, surface emission rate, activity per unit area, alpha, beta, photon, traceability, radiation metrology.