EOP SGTR

Question 1

What are the Entry Conditions for E-3?

Answer 1

1. ) SG Tubes Not Intact (E-0)2. ) Secondary Rad Abnormal 3. ) SG Level Rises Uncontrollably 4. ) In ECA-3.3 when PRZ Pressure control is restored.

Question 2

E-3 Major Action Categories?

Answer 2

1. ) 1. Identify / Isolate Ruptured SG2. ) Cooldown to get margin for Subcooling3. ) Depressurize to match S/G press and restore RCS level 4. ) Terminate SI5. ) Prepare to Cool Down to RHR.

Question 3

What are the E-3 Transitions?

Answer 3

All 3 Series ECA and ES Procedures.

Question 4

What is The DP Maintained Between Intact and Ruptured SG in E3?

Answer 4

250lbs DP is maintained to ensure SC while the primary to secondary leakage is stopped.

Question 5

What is the preferred order for INITIALLY depressurizing in E3?

Answer 5

1. ) Normal Spray 2. ) PRZ PORV3. ) Aux Spray (IF LD In Service)

Question 6

What is the preferred order for BALANCING SG and RCS Pressure in E3?

Answer 6

1. ) Normal Spray2. ) Aux Spray3. ) PRZ PORV

Question 7

What is the Radiological concern with Iodine in a SGTR?

Answer 7

Iodine concentrates in the SG while steaming. (Iodine Partitioning) This becomes an even larger problem if the SG is overfilled.

Question 8

How is SG Overfilling Prevented in E-3?

Answer 8

Isolating Ruptured SG, Cool Down and Depressurize RCS, and then Terminate SI.

Question 9

What are the concern with overfilling a SG?

Answer 9

• • MS Line not designed for weight of water and water hammer. - - PORVs, Safeties, and TDAFP NOT designed for water.

Question 10

What is done to the Ruptures SG PORV?

Answer 10

The ruptured SG PORV setpoint is raised to 1040lbs to limit the release and maintain DP to intact SGs.

Question 11

What is the minimum lvl establish in a ruptured SG?

Answer 11

13% NR to ensure the SG tubes are covered. This also ensures a separation of the steam space from the tubes to prevent condensation and SG Pressure from lowering.

Question 12

What is the cool down rate in E-3?

Answer 12

MAXIMUM. - -Dumps (If available)- -Intact SG PORVS

Question 13

What is unique about the RCP Trip Criteria in E-3?

Answer 13

RCPs are not tripped when RCS Press <1300lbs IF Cool Down has been started.

Question 14

What is the basis for the target temperatures for the cool down in E-3?

Answer 14

Maintain at least 20 Deg Sub Cooling for SI Reinitiation.

Question 15

What is the Concern with The cold Leg Temps on Nat Circ?

Answer 15

There is a possibility of false CL indications on Loops with a SGTR. Tcold indication on this loop is disregarded for Integrity CSF.

Question 16

Then in CSFST For integrity disregarded in E-3?

Answer 16

ONLY when on NAT circ for the associated CL indicated for a loop with a STGR. This is ONLY applicable in E-3.

Question 17

What is an indication of RX Head Voiding in E-3?

Answer 17

Rapidly rising Prz Lvl while depressurizing RCS.

Question 18

What are the Indications of a SGTR?

Answer 18

• NR Lvl Rising uncontrollably.- Secondary Rad (BD 31/32, SJAE 19, GS 18) PORVs (If Open)- FF/SF Miss Match- NO RCP Provides false indication of SGTR. (MONITOR)

Question 19

The is the Definition of a SG Tube Leak?

Answer 19

Leak capacity is within the capacity of a charging pump in normal alignment.

Question 20

What is a SGTR?

Answer 20

Leak is GREATER than the capacity of a CCP with max flow and no LD. TRIP and SI required.