Standard Practice for Surveillance Testing of High-Temperature Nuclear Component Materials

Importancia y uso:

4.1 The practice contained herein can be used as a basis for establishing conditions for the safe operation of critical structural components. The practices provide for general plant assessment and verification that materials continue meet design criteria and may in addition be of use for asset protection or life extension. The test specimens and procedures presented in this practice are for guidance when establishing a surveillance program.

4.2 This practice for high-temperature materials surveillance programs is used when nuclear reactor component materials are monitored by specimen testing. Periodic testing is performed through the service life of the components to assess changes in selected material properties that are caused by neutron irradiation, thermal effects, chemical reactions, and mechanical stress. The properties of interest are those used as design criteria for the respective nuclear components or well correlated to said criteria (see 5.1.6). The need for surveillance arises from the need to assess predictions of aging material performance to ensure adequate component performance.

4.3 This practice describes specimens and procedures required for the surveillance of multiple components. A surveillance program for a particular component will not necessarily require all test types described herein.

Subcomité:

E10.02

Volúmen:

12.02

Número ICS:

13.280 (Radiation protection), 17.200.01 (Thermodynamics in general), 77.040.01 (Testing of metals in general)

Palabras clave:

irradiation; nuclear reactor vessels and components (high temperature); radiation exposure; surveillance (of nuclear reactor vessels and components);