Q26 — SW122 Fail Position
076 Service Water System (SWS)-K4.03 (3.9)
Given:
Considering ONLY the following plant conditions below:
1. A loss of control air to 21SW122 (21 CC Hx Control Valve)
2. SEC Mode III Operation
3. A loss of 125 VDC power to 21SW122 (21 CC Hx Control Valve)
Which ONE of the following completes the statement below?
Condition(s) ___ will cause 21SW122 to go FULLY OPEN.
Considering ONLY the following plant conditions below:
1. A loss of control air to 21SW122 (21 CC Hx Control Valve)
2. SEC Mode III Operation
3. A loss of 125 VDC power to 21SW122 (21 CC Hx Control Valve)
Which ONE of the following completes the statement below?
Condition(s) ___ will cause 21SW122 to go FULLY OPEN.
A. 1 ONLY
B. 2 ONLY
C. 2 and 3 ONLY
D. 1 and 3 ONLY
▶ Show Answer & Explanation
✓ A. Correct. ONLY a loss of control air to 21SW122 will cause 21SW122 to go FULLY OPEN.
✗ B. Incorrect but plausible. ALL 3 possible conditions listed in the question stem will cause 21SW122 to either go fully closed or fully open. Consequently, all of the distractors are plausible.
✗ C. Incorrect but plausible. ALL 3 possible conditions listed in the question stem will cause 21SW122 to either go fully closed or fully open. Consequently, all of the distractors are plausible.
✗ D. Incorrect but plausible. ALL 3 possible conditions listed in the question stem will cause 21SW122 to either go fully closed or fully open. Consequently, all of the distractors are plausible.
Ref: NOS05SWONUC-14 (SERVICE WATER - NUCLEAR HEADER) | LO: Describe the function of Component Cooling Heat Exchangers and SW122, SW127, SW380/383, SW376/379 and how their normal and abnormal operation affects the Service Water - Nuclear Header System | Source: New | Cognitive: Lower
Connections
- Related systems: Service Water, CCW, Control Air, SECs
- Related exam: 2019 NRC Written Exam