SALEM
SALEM STUDY SYSTEM
Exams > 2018 Q74 — EOP-FRCE-2 Containment Sump Level and CFCU SW Isolation

2018 Q74 — EOP-FRCE-2 Containment Sump Level and CFCU SW Isolation

⚠️ DRAFT
Q74 — EOP-FRCE-2 Containment Sump Level and CFCU SW Isolation W/E15 Containment Flooding-EA1.2 (2.7)
Given:
• The crew is performing 2-EOP-FRCE-2 (Response To High Containment Sump Level)
• SW flow to 25 CFCU is abnormally high
• 25 CFCU has just been stopped

Which ONE of the following completes the statements below?

In accordance with 2-EOP-CFST-1 (Critical Safety Function Status Trees), the crew entered 2-EOP-FRCE-2 when Containment Sump Level reached a minimum of _(1)_ %.

In accordance with 2-EOP-FRCE-2, the crew will close 25SW58 (Inlet Water Valve) _(2)_.
A. _(1)_ 75 _(2)_ and 25SW72 (Outlet Water Valve)
B. _(1)_ 75 _(2)_ ONLY
C. _(1)_ 78 _(2)_ and 25SW72 (Outlet Water Valve)
D. _(1)_ 78 _(2)_ ONLY
▶ Show Answer & Explanation
✓ C. Correct. For Part 1, IAW 2-EOP-CFST-1, the crew entered 2-EOP-FRCE-2 when Containment Sump Level reached a minimum of 78% (75% adverse). Since the question stem indicates containment pressure is normal, the crew entered 2-EOP-FRCE-2 when Containment Sump Level reached a minimum of 78%. For Part 2, in accordance with 2-EOP-FRCE-2 Step 1, the crew will close 25SW58 (Inlet Water Valve) and 25SW72 (Outlet Water Valve).
✗ A. For Part 1, Containment Sump Level of 75% is the adverse level in which EOP-CFST-1 requires performance of EOP-FRCE-2. Consequently, the candidate could incorrectly conclude for the given plant conditions that 2-EOP-FRCE-2 is entered when Containment Sump Level reached a minimum of 75%. Part 2 is correct.
✗ B. For Part 1, Containment Sump Level of 75% is the adverse level in which EOP-CFST-1 requires performance of EOP-FRCE-2. Consequently, the candidate could incorrectly conclude for the given plant conditions that 2-EOP-FRCE-2 is entered when Containment Sump Level reached a minimum of 75%. For Part 2, when 25 CFCU was stopped, 25SW223 automatically closed. 25SW223 is directly downstream of 25SW72. Consequently, the candidate could incorrectly conclude that 2-EOP-FRCE-2 only requires the affected CFCU's SW Inlet valve (SW58) to be closed.
✗ D. Part 1 is correct. For Part 2, when 25 CFCU was stopped, 25SW223 automatically closed. 25SW223 is directly downstream of 25SW72. Consequently, the candidate could incorrectly conclude that 2-EOP-FRCE-2 only requires the affected CFCU's SW Inlet valve (SW58) to be closed.
Ref: 2-EOP-FRCE-2 (Response To High Containment Sump Level) | LO: NOS05FRCE00-06 (EOP-FRCE-1, 2, AND 3 CONTAINMENT ENVIRONMENT) | Source: New | Cognitive: Lower

Connections