The paper reviews and analyses the effects of gamma irradiation dose on the properties of ferritic steels used in reactor pressure vessels (RPVs). It explains factors that affect the embrittlement of a RPV steel induced by combinations of fast neutrons, thermal neutrons, and, arnma irradiation. TAGSI were asked to consider the effects of gamma irradiation dose on the properties of steels used in reactor pressure vessels. TAGSI endorsed the use of the MCBEND code to calculate gamma fluxes and energetic gamma ray displacement cross-sections calculated using either Baumann or Alexander methods. TAGSI endorsed the calculation of the materials property changes due to an additional gamma dose using trend curves based on empirical correlation to neutron-induced damage (where k gamma similar to 1 +/- 0.25). (c) 2004 Elsevier Ltd. All rights reserved.
|Number of pages||12|
|Journal||International Journal of Pressure Vessels and Piping|
|Publication status||Published - 1 Dec 2005|
- gamma ray damage
- embrittlement mechanisms
- irradiated ferritic reactor pressure vessel steels
- trend curve development