ECG misc.

Question 1

ECG 4.1 AMSAC

What are the two transients that AMSAC is designed to protect against?

Answer 1

• Loss of feedwater ATWIS
• Loss of load ATWIS

Question 2

ECG 23.3 Cnmt Vent

Why are the Cnmt purge/ exhaust or press/ vacuum relief valves limited to be open < 200 hrs/ yr?

Answer 2

• Minimize probability of LOCA occurring while valves are open
• therefore minimize offsite boundary doses

Question 3

ECG 7.4 Chemistry

When are the chemistry limits of DO2, Cl and Fl applicable?

Answer 3

DO2 >250 deg F

Cl / Fl at all times

Question 4

ECG 0.3 Motherhood

When is ECG 0.3 entered?

Whose permission should be obtained prior to entering this ECG?

Answer 4

ECG 0.3 is enterred when ECG AND actions not met OR actions not provided.

Station director approval should be obtained prior to entry and SHALL be obtained w/in 24 hours of entry