ISO 19226:2017
Nuclear energy - Determination of neutron fluence and displacement per atom (dpa) in reactor vessel and internals

Standard No.

ISO 19226:2017

Release Date

2017

Published By

International Organization for Standardization (ISO)

Latest

ISO 19226:2017

Scope

This document provides a procedure for the evaluation of irradiation data in the region between the reactor core and the inside surface of the containment vessel, through the pressure vessel and the reactor cavity, between the ends of active fuel assemblies, given the neutron source in the core. NOTE These irradiation data could be neutron fluence or displacements per atom (dpa), and Helium production. The evaluation employs both neutron flux computations and measurement data from in-vessel and cavity dosimetry, as appropriate. This document applies to pressurized water reactors (PWRs), boiling water reactors (BWRs), and pressurized heavy water reactors (PHWRs). This document also provides a procedure for evaluating neutron damage properties at the reactor pressure vessel and internal components of PWRs, BWRs, and PHWRs. Damage properties are focused on atomic displacement damage caused by direct displacements of atoms due to collisions with neutrons and indirect damage caused by gas production, both of which are strongly dependent on the neutron energy spectrum. Therefore, for a given neutron fluence and neutron energy spectrum, calculations of the total accumulated number of atomic displacements are important data to be used for reactor life management.

ISO 19226:2017 Referenced Document

• ANSI/ANS 19.10-2009 Methods for Determining Neutron Fluence in BWR and PWR Pressure Vessel and Reactor Internals*， 2024-04-20 Update
• ASTM E1005-16 Standard Test Method for Application and Analysis of Radiometric Monitors for Reactor Vessel Surveillance*， 2024-04-20 Update
• ASTM E1297-08 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Niobium
• ASTM E170-16 Standard Terminology Relating to Radiation Measurements and Dosimetry*， 2024-04-20 Update
• ASTM E181-10 Standard Test Methods for Detector Calibration and Analysis of Radionuclides
• ASTM E2006-16 Standard Guide for Benchmark Testing of Light Water Reactor Calculations*， 2024-04-20 Update
• ASTM E261-16 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques*， 2024-04-20 Update
• ASTM E263-13 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron*， 2024-04-20 Update
• ASTM E264-08 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel*， 2024-04-20 Update
• ASTM E523-16 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
• ASTM E526-08 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium*， 2024-04-20 Update
• ASTM E704-13 Standard Test Method for Measuring Reaction Rates by Radioactivation of Uranium-238*， 2024-04-20 Update
• ASTM E705-13 Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237*， 2024-04-20 Update
• ASTM E854-03 Standard Test Method for Application and Analysis of Solid State Track Recorder (SSTR) Monitors for Reactor Surveillance, E706(IIIB)*， 2024-04-20 Update
• ASTM E910-07 Standard Test Method for Application and Analysis of Helium Accumulation Fluence Monitors for Reactor Vessel Surveillance, E706 (IIIC)*， 2024-04-20 Update
• ISO 8529-1:2001 Reference neutron radiations - Part 1: Characteristics and methods of production

ISO 19226:2017 history

• 2017 ISO 19226:2017 Nuclear energy - Determination of neutron fluence and displacement per atom (dpa) in reactor vessel and internals