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Exams > 2023 Q62 — Area Radiation Monitoring / CAV / 1R1A

2023 Q62 — Area Radiation Monitoring / CAV / 1R1A

⚠️ DRAFT
Q62 — Area Radiation Monitoring / CAV / 1R1A T2G2 072 A4.02 (3.4)
Given:
- Salem Units 1 and 2 are at 100% power
Then:
- 1R1A, Control Room Area, Radiation Monitor is in Alarm

Which of the following actions is required?

Note: CAV = Control Room Area Ventilation
AP = Accident Pressurized
A. Verify automatic actuation of ONLY Unit 1 CAV in AP Mode.
B. Verify automatic actuation of ONLY Unit 2 CAV in AP Mode.
C. Manually press AP pushbutton at 1RP2 panel to actuate BOTH units CAV in AP Mode.
D. Manually press AP pushbutton at 2RP2 panel to actuate BOTH units CAV in AP Mode.
▶ Show Answer & Explanation
✓ C. Correct. Per the ARP for 1R1A radiation monitor in alarm, the control room crew will be required to place the Control Room Ventilation (CAV) System into Accident Pressurized (AP) Mode. Since the area radiation monitor is alarm sensing radiation on Salem Unit 1 side, the crew will actuate CAV in AP Mode from Unit 1 which will actuate both units CAV into AP Mode and open the emergency intake dampers on the unaffected unit, in this case unit 2.
✗ A. Plausible because the operator may confuse the 1R1A with the 1R1B radiation monitors and believe that it will actuate CAV in AP Mode only on the affected unit. Incorrect in that 1R1A area radiation monitors will not actuate CAV in AP Mode.
✗ B. Plausible because the operator may confuse the 1R1A with the 1R1B radiation monitors and believe that it will actuate CAV in AP Mode only on the affected unit. Incorrect in that 1R1A area radiation monitors will not actuate CAV in AP Mode.
✗ D. Plausible because the operator may confuse which unit to actuate CAV in AP Mode to align the emergency intake dampers on the unaffected unit, in this case unit 2.
Ref: S2.OP-AB.RAD-0001 (R30), S2.OP-SO.CAV-0001 (R43) | LO: NOS05REFUEL-13 | Source: New | Cognitive: Comprehension/Analysis

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