Q32 — Containment Internal Pressure / TS 3.6.1.4
029 CPS-A2.01 (2.9)
Given:
• Unit 2 is at 25% Reactor Power and stable
• Emergent maintenance activities are ongoing inside containment
• Containment pressure is slowly rising due to the maintenance activities
In accordance with Unit 2 Technical Specifications, which ONE of the following completes the statements below?
LCO 3.6.1.4 (CONTAINMENT INTERNAL PRESSURE) will NOT be met when containment pressure is greater than a MINIMUM of + _(1)_ psig.
When LCO 3.6.1.4 is NOT met, the crew is required to restore containment internal pressure within limits within a MAXIMUM of _(2)_ minutes or place the Unit in HOT STANDBY within the next 6 hours.
• Unit 2 is at 25% Reactor Power and stable
• Emergent maintenance activities are ongoing inside containment
• Containment pressure is slowly rising due to the maintenance activities
In accordance with Unit 2 Technical Specifications, which ONE of the following completes the statements below?
LCO 3.6.1.4 (CONTAINMENT INTERNAL PRESSURE) will NOT be met when containment pressure is greater than a MINIMUM of + _(1)_ psig.
When LCO 3.6.1.4 is NOT met, the crew is required to restore containment internal pressure within limits within a MAXIMUM of _(2)_ minutes or place the Unit in HOT STANDBY within the next 6 hours.
A. _(1)_ 0.2 _(2)_ 30
B. _(1)_ 0.2 _(2)_ 60
C. _(1)_ 0.3 _(2)_ 30
D. _(1)_ 0.3 _(2)_ 60
▶ Show Answer & Explanation
✓ D. Correct. For Part 1, LCO 3.6.1.4 (INTERNAL PRESSURE) will NOT be met when containment pressure is greater than a minimum of +0.3 psig. For Part 2, when LCO 3.6.1.4 is NOT met, the crew is required to restore containment internal pressure within limits within a MAXIMUM of 60 minutes or place the Unit in HOT STANDBY within the next 6 hours.
✗ A. For Part 1, the BEZEL Hi CNTMT Pressure Alarm is 0.2 psid. Consequently, the candidate could incorrectly determine that LCO 3.6.1.4 will NOT be met when containment pressure is greater than a minimum of +0.2 psig. For Part 2, there are other LCOs with 30 minutes REQUIRED ACTION (LCOs 3.2.1, 3.2.4, 3.4.10.2 and 3.7.2). Consequently, the candidate could incorrectly conclude that the restoration time is 30 minutes.
✗ B. For Part 1, the BEZEL Hi CNTMT Pressure Alarm is 0.2 psid. Part 2 is correct.
✗ C. Part 1 is correct. For Part 2, there are other LCOs with 30 minutes REQUIRED ACTION (LCOs 3.2.1, 3.2.4, 3.4.10.2 and 3.7.2). Consequently, the candidate could incorrectly conclude that the restoration time is 30 minutes.
Ref: NOS05CONTMT-15 (Containment and Containment Support Systems) | LO: NOS05CONTMT-15 Obj 9 — Given a Containment situation, apply the appropriate Tech Spec action | Source: Modified Bank | Cognitive: Lower
Connections
- Related systems: Containment
- Related tech specs: TS 3/4.6 — Containment
- Related exam: 2018 NRC Written Exam