Brittle Fracture:

Personnel required knowing brittle fracture. This category of fracture occurs under specific conditions without warning and could cause main damage to plant materials.

DEFINE the subsequent terms:

a. Ductile fracture  c. Nil-ductility Transition

b. Brittle fracture (NDT) Temperature

DESCRIBE the two modifications made to reactor pressure vessels to decrease NDT.

STATE the effect grain size and irradiation have on a material's NDT.

LIS T the three conditions essential for brittle fracture to occur.

STATES the three conditions which tend to mitigate crack initiation.

LIST  the  five  factors  which determine  the  fracture  toughness  of  a material.

Given a stress-temperature diagram and IDENTIFIES the following points:

a. NDT (with no flaw) c. Fracture transition elastic point

b. NDT (with flaw)  d. Fracture transition plastic point