Verfahren zur Beurteilung der Bestrahlungsschädigung von Kernreaktordruckgefässen

Details

Veröffentlichungs-Nr.

EP4760749

Anmeldetag

12. Dezember 2024

Veröffentlichung

17. Juni 2026

Rechtsraum

EP

IPC

G21C17/00, // G01N3/42

Abstract

A method for the assessment of the irradiation embrittlement in a nuclear reactor pressure vessel RPV (10) comprises the steps (a): cutting a specimen (20, 40) from an un-irradiated RPV (10); (b): measuring grain size D_g of each grain (30) on a region (21, 41) of the specimen (20, 40); (c): performing several indentation tests at a temperature on this region; (d) to (g): for each test, calculating for each grain (30) the slip band number density N/D_g from equations; (h): repeating steps (c) to (g) at different temperatures to obtain an un-irradiated curve around the ductile-brittle transition temperature DBTT; (i): submitting specimen (40) to an irradiation dose and repeating steps (b) to (g) at different temperatures to obtain an irradiated curve around the DBTT; (j) and (k): assessing the irradiation embrittlement in the RPV from the ductile-brittle transition shift between the un-irradiated and irradiated curves.

Anmelder

Firmen

Commissariat à l'Energie Atomique et aux Energies Alternatives
Sun Yat-Sen University

Land

🇫🇷 Frankreich

Fachgebiete