Development of an Assessment Method for Building Materials Under Euratom Scope

Area of Science:

• Radiation Protection
• Materials Science
• Environmental Health

Background:

• The European Commission's Council Directive 2013/59/Euratom (EU-BSS) now includes raw materials with elevated activity concentrations in building materials.
• Compliance with the 1-mSv/y reference radiation exposure level is required for these materials.
• Traditional gamma-spectrometry for assessment is resource-intensive, especially for materials with low radiation risk.

Purpose of the Study:

• To develop an alternative assessment method for building materials under EU-BSS.
• To exempt compliant building materials from extensive gamma-spectrometric testing.
• To propose a composition-based compliance strategy linked to surface density.

Main Methods:

• Defined maximum permitted weight percentages for specific raw materials (Annex XIII of EU-BSS).
• Established the permitted content as a function of the building product's surface density.
• Validated the proposed method through comprehensive testing and analysis.

Main Results:

• A method allowing assessment based on material composition rather than direct radiation measurement.
• Permitted raw material content varies inversely with surface density (e.g., ~100% for low density, ~15% for high density).
• Building materials meeting composition criteria are exempt from routine testing.

Conclusions:

• The composition-based method offers a practical and efficient approach to EU-BSS compliance for building materials.
• This strategy reduces unnecessary testing for materials posing minimal radiation risk.
• The study provides a framework for regulatory implementation of the new assessment approach.