Selection of specimen types for irradiation surveillance programs

Conference · Thu Oct 01 00:00:00 EDT 1981 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:6476203

Varga, T; Njo, D H

Recent trends in coping with embrittlement problems in reactor pressure vessels (RPVs) show two main directions of development: (1) improvement of the vessel materials and (2) limitations of fluence over the design life of the RPV. For several reasons, however, adequate irradiation surveillance programs are still considered to be necessary in the future, despite possible improvements resulting from such research activities. Since the introduction of linear elastic fracture mechanics (LEFM) and elastic-plastic fracture mechanics, (EPFM), irradiation surveillance programs show a trend towards direct measurement of fracture toughness, in addition to relying on the conventional nil-ductility transition temperature (NDTT) shift as a relative measure of embrittlement. Some basic considerations concerning the selection of specimen types for irradiation surveillance programs and some technical aspects of currently used speciment types are discussed.

• Research Organization: Inst. for Testing and Research in Materials Technology, Technical Univ. of Vienna, Vienna
• OSTI ID: 6476203
• Report Number(s): CONF-8110312-
• Journal Information: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Vol. STP-819; Conference: Meeting on nuclear technology and applications, Vienna, Austria, 19 Oct 1981
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
PRESSURE VESSELS
EMBRITTLEMENT
FRACTURE MECHANICS
REACTOR COMPONENTS
FRACTURE PROPERTIES
MATERIALS TESTING
MEASURING METHODS
MONITORING
PHYSICAL RADIATION EFFECTS
SAMPLING
CONTAINERS
MECHANICAL PROPERTIES
MECHANICS
RADIATION EFFECTS
TESTING
220200* - Nuclear Reactor Technology- Components & Accessories