Effects of neutron dose, dose rate, and irradiation temperature on the irradiation embrittlement of a low-copper reactor pressure vessel steel

Ryuta Kasada, Takeshi Kudo, Akihiko Kimura, Hideki Matsui, Minoru Narui

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

A series of irradiation experiments to investigate the effects of neutron tluence and flux on reactor pressure vessel (RPV) steels has been performed using the Japan Material Testing Reactor (JMTR). The irradiation temperature has been precisely controlled at 290°C within an error of ±2°C during reactor operation. The neutron fluence and tlux ranged from 9.3 × 1017 to 1.1 × 1020 n/cm2 and from 1.4 × 1011 to 6.3 × 1013 n/cm2/s, respectively. The material used in the present study was an A533B RPV steel in which the copper and phosphorous concentrations are 0.03 and 0.002 wt%, respectively. Charpy impact test results with one-third sized specimens showed no dose-rate dependence. Microstructural observation revealed that a higher irradiation temperature at around 340°C resulted in formation of rather large dislocation loops and smaller microvoids.

Original languageEnglish
Title of host publicationEffects of Radiation on Materials
Subtitle of host publication22nd Symposium
PublisherAmerican Society for Testing and Materials
Pages225-235
Number of pages11
ISBN (Print)0803134010, 9780803134010
Publication statusPublished - 2006
Event22nd Symposium on Effects of Radiation on Materials - Boston, MA, United States
Duration: 2004 Jun 82004 Jun 10

Publication series

NameASTM Special Technical Publication
Volume1475 STP
ISSN (Print)0066-0558

Conference

Conference22nd Symposium on Effects of Radiation on Materials
Country/TerritoryUnited States
CityBoston, MA
Period04/6/804/6/10

Keywords

  • Charpy impact test
  • Dose rate effects
  • Irradiation embrittlement
  • Irradiation hardening
  • Reactor pressure vessel steel

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