Q54 — Containment Internal Pressure TS 3.6.1.4
T2G1 103 K6.15 (3.1)
Given:
• Salem Unit 2 is at 100% power
Then:
• A steam leak is occurring inside containment
• Containment pressure is slowly rising
Based on the above condition, which of the following completes both statements in accordance with TS 3.6.1.4, Containment Systems - Internal Pressure?
1. If containment pressure exceeds a MINIMUM of (+) (1) psig, then containment DESIGN LIMITS could be exceeded during a Design Based Accident.
2. Containment internal pressure must be restored to within the limits within (2).
• Salem Unit 2 is at 100% power
Then:
• A steam leak is occurring inside containment
• Containment pressure is slowly rising
Based on the above condition, which of the following completes both statements in accordance with TS 3.6.1.4, Containment Systems - Internal Pressure?
1. If containment pressure exceeds a MINIMUM of (+) (1) psig, then containment DESIGN LIMITS could be exceeded during a Design Based Accident.
2. Containment internal pressure must be restored to within the limits within (2).
A. (1) 1.5 (2) 1 hour
B. (1) 1.5 (2) 15 minutes
C. (1) 0.3 (2) 15 minutes
D. (1) 0.3 (2) 1 hour
▶ Show Answer & Explanation
✓ D. Correct. Based on TS bases for TS 3.6.1.4, Internal Pressure must be maintained between -1.5 and +0.3 psig during Modes 1-4. Limitation on containment internal pressure ensure that (1) the containment structure is prevented from exceeding its design negative pressure differential with respect to the outside atmosphere of 3.5 psig, and (2) the containment peak pressure does not exceed the design pressure of 47 psig during the limiting pipe break condition. The pipe breaks considered are LOCA and steam line break. Containment Pressure must be restored within limits within 1 hour.
✗ A. Incorrect. Plausible because the operator may confuse this value with the TS value of (-) 1.5 psig.
✗ B. Incorrect. Plausible because the operator may confuse this value with the TS value of (-) 1.5 psig.
✗ C. Incorrect. Plausible because there are other TS LCO with less than one hour limits.
Ref: TS 3.6.1.4 and Bases | Source: New | Cognitive: Fundamental/Memory
K/A: 103 K6.15 — Knowledge of the effect of the following plant conditions, system malfunctions, or component malfunctions on the Containment System: MRSS
K/A: 103 K6.15 — Knowledge of the effect of the following plant conditions, system malfunctions, or component malfunctions on the Containment System: MRSS
Connections
- Related systems: Containment, Main Steam
- Related tech specs: TS 3/4.6 — Containment
- Related exam: 2023 NRC Written Exam