ECCS

Question 1

What are the ECCS Acceptance Criteria?

Answer 1

Peak Clad temp <=2200dFMax Clad Oxidation <= 17%Max Hydrogen production <=1% of max Maintain coolable core geometryLong term cooling with no operator actions

Question 2

What methods can be used for adequate core cooling?

Answer 2

Core SubmergenceSteam cooling w/injectionSteam cooling w/o injection2/3 core height with 5000gpm of core spray

Question 3

What controls the amount of heat available for the Zr+2H20 reaction?

Answer 3

Operating within APLHGR limits

Question 4

What controls the core uncovery time for accident analysis?

Answer 4

ECCS response time

Question 5

What is ECCS response time?

Answer 5

Time from when a parameter exceeds ECCS initiation set point until ECCS performs safety function

Question 6

What is the difference between Deflagration and Detonation?

Answer 6

Both burn with intense heatDeflagration - flames travel at subsonic speedsDetonation - flames travel at super sonic speeds