E-2 Daily Quiz

Question 1

Define a small and intermediate sized secondary break

Answer 1

Small - MFW system maintains levels

Inter - RX trip will occur ~5 min

Question 2

What secondary breaks will not result in a safety injection with proper operator action?

Answer 2

Downstream of MSSV

Upstream of FW Check Valve

Question 3

Procedure flow paths for secondary break with and without SI?

Answer 3

W/O E-0 > E-2 > ES-1.1

W/ E-0 > E-2 > E-1 > ES-1.1

Question 4

UFSAR assumptions to a steamline break

Answer 4

EOL
Most reactive rod stuck out
ECCS injection at 2400ppm
Return to critical

Question 5

Why must AFW flows be lowered periodically following a steamline break?

Answer 5

Lowering decay heat levels

Question 6

Three reasons to limit plant heatup after the faulted generator has finished blowing down

Answer 6

PRZ overfill
Water relief through PORVs
Delta P acrossed SG tubes

Question 7

Major actions of E-2

Answer 7

Main steam line isolation
One non faulted SG
Isolate faulted
Check for SGTR

Question 8

Time critical action to isolate AFW following a faulted SG

Answer 8

30 min

Question 9

One SG has a faulted FW line after isolation is complete the operator realizes that the other three pressures are lowering uncontrollably what must be done?

Answer 9

Transition to ECA-2.1

Question 10

What is the purpose of checking for any SG pressure lowering uncontrollably or RCS pressure rising in E-1?

Answer 10

Once the faulted SG is done blowing down RCS pressure should rise and SI termination criteria met.
If not SBLOCA is suspected

Question 11

What signal will generate an SI during an uncontrolled depressurization of a SG?

Answer 11

Low steamline pressure

Question 12

What happens to heat transfer rate as Tavg lowers?

Answer 12

Lowers

Question 13

What is the limiting challenge to the core during an uncontrolled depressurization of a SG?

Answer 13

Pressurized thermal shock

Question 14

What will happen to RCS pressure and cause PRZ level to eventually rise while in E-1 loop for a faulted steam generator that is still blowing down?

Answer 14

ECCS flow > shrinkage rate once cooldown is over

Question 15

Minimum AFW flow when all SGs are faulted?

Answer 15

25k per to prevent dryout

Question 16

While in ECA-2.1 it is noted that the cooldown was >100 degrees in 60 min what must be done with AFW flow?

Answer 16

Lower to 25k to each

Question 17

Major action categories of ECA-2.1?

Answer 17

Establish secondary pressure boundary
Control feed flow to:
-limit cooldown
-prevent overfill
Terminate SI
Cooldown to place RHR in service
Cooldown to cold shutdown

Question 18

What actions are taken if SG level is rising uncontrollably while in ECA-2.1?

Answer 18

E-3

Question 19

What must be met to transition from ECA-2.1 to E-2?

Answer 19

Pressure boundary restored unless terminating SI in steps 10-20

Question 20

When will SI pumps be stopped in ECA-2.1?

Answer 20

SI termination criteria met with RCS pressure > SI pp shutoff head and rising

Question 21

What is the basis for ECA-2.1 Att A?

Answer 21

Complete local check of valves for each SG to restore integrity to at least one as early as possible