Q77 — LOCA Containment Spray vs FRP Purple Path Priority
T1G1 EPE 11 G2.4.14 (4.5)
Given:
- A LOCA is in progress on Salem Unit 2.
- The crew is implementing 2-EOP-LOCA-1, Loss of Reactor or Secondary Coolant, and is currently at Step 7.4 for assessing conditions for stopping containment spray pumps.
- Containment pressure is 23 psig.
Then:
- A valid PURPLE path exists on Thermal Shock
- Containment pressure is below 13 psig.
In accordance with OP-SA-108-101-2002, EOP Users Guide, which of the following is required and why?
Note: FRP = Functional Restoration Procedure(s)
- A LOCA is in progress on Salem Unit 2.
- The crew is implementing 2-EOP-LOCA-1, Loss of Reactor or Secondary Coolant, and is currently at Step 7.4 for assessing conditions for stopping containment spray pumps.
- Containment pressure is 23 psig.
Then:
- A valid PURPLE path exists on Thermal Shock
- Containment pressure is below 13 psig.
In accordance with OP-SA-108-101-2002, EOP Users Guide, which of the following is required and why?
Note: FRP = Functional Restoration Procedure(s)
A. Step 7.4 may be performed if the CRS determines there is no conflict with implementing the FRP.
B. Immediately perform Step 7.4; a Note step in EOP-LOCA-1 specifically states NO FRPs are to be implemented during performance of EOP-LOCA-1.
C. Immediately perform Step 7.4; Step 7.4 is a continuous action step and still in effect.
D. DO NOT perform Step 7.4; transition to FRP for PURPLE path.
▶ Show Answer & Explanation
✓ D. Correct. Per OP-SA-108-101-2002 step 2.16.2, a continuous action step should not be performed when a Red or Purple path FRP is in progress. Therefore, even though conditions of LOCA-1 step 7.4 are met, the crew should not stop CS pumps.
✗ A. Plausible because the operator may believe that if a conflict arises between actions of an EOP and FRP that the CRS will always have the option to determine the best path to take, for example "Thinking Compliance".
✗ B. Plausible because EOP-LOCA-3 has a Note (N1-1) that does state to NOT implement FRPs while performing actions to establish cold leg recirculation.
✗ C. Plausible because step 7.4 is a continuous action step and would be performed when conditions are met. Incorrect in that continuous actions are not performed when transitions are made to a Red or Purple path FRP.
Ref: OP-SA-108-101-2002 (R0), 2-EOP-CFST-1 (R41) | LO: NOS05TRP001-09, Objective 10 | Source: Bank - Salem | Cognitive: Fundamental/Memory
Connections
- Related systems: Containment Spray, Containment
- Related EOPs: EOP-LOCA-1 — Loss of Reactor or Secondary Coolant
- Related procedures: OP-SA-108-101-2000 — Emergency/Abnormal Operating Procedure Program
- Related exam: 2023 NRC Written Exam