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EPRI EF Nuclear Power Plant Materials Certification Exam Questions and answers with 100% Complete Solutions | verified &updated 2024 $13.49   Add to cart

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EPRI EF Nuclear Power Plant Materials Certification Exam Questions and answers with 100% Complete Solutions | verified &updated 2024

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EPRI EF Nuclear Power Plant Materials Certification Exam Questions and answers with 100% Complete Solutions | verified &updated 2024

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  • October 26, 2024
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EPRI EF Nuclear Power Plant Materials
Certification Exam Questions and answers
with 100% Complete Solutions | verified
&updated 2024



Strain - ✔✔Whenever a stress (no matter how small) is applied to a metal, a

proportional dimensional change or distortion must take place. Such a

proportional dimensional change (intensity or degree of the distortion) is called

strain and is measured as the total elongation per unit length of material due

to some applied stress.




Strength - ✔✔A measure of the ability of a material to support an applied load.

It is the ability of a material to resist deformation.




Stress - ✔✔-The internal resistance, or counterforce, of a material to the

distorting effects of an external force or load. These counterforces tend to return

the atoms to their normal positions. The total resistance developed is equal to

the external load. This resistance is known as stress.

,-expressed in pounds per square inch.




Toughness - ✔✔A combination of strength and ductility, i.e., the ability or

capacity of material to absorb energy and deform plastically before fracturing.

Toughness describes the way a material reacts under sudden impacts.




Water hammer - ✔✔Water hammer (or, more generally, fluid hammer) is a

pressure surge or wave caused by the kinetic energy of a fluid in motion when it

is forced to stop or change direction suddenly. It depends on the fluid

compressibility where there are sudden changes in pressure. For example, if a

valve is closed suddenly at an end of a pipeline system a water hammer wave

propagates in the pipe. Moving water in a pipe has kinetic energy proportional to

the mass of the water in a given volume times the square of the velocity of the

water.




Why is degradation of materials important? - ✔✔The principle concern with

degradation of materials is nuclear safety. Corrosion that weakens the walls of

, piping can allow the release of high energy fluids that not only challenge the

performance of nuclear safety-related systems, but can also cause significant

personnel injury. Degradation of the reactor coolant pressure boundary can

lead to the release of radioactive materials from the reactor coolant system,

thereby reducing the defense-in-depth for the plant


workers and the general public from exposure to radiation.




Materials degradation can... - ✔✔cause costly outages, increase regulatory


oversight, and create losses due to the impact of cost, time, and effort of

station management and personnel.




PWR - ✔✔pressurized water reactor




BWR - ✔✔boiling water reactor




Stress Corrosion Cracking (SCC) - ✔✔Stress corrosion cracking can occur under

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