Q51 — SGBD Rad Monitor Warning Setpoint
073000K4.01 (4.0)
Which ONE of the following describes the AUTOMATIC actuations, if any, that will occur if a R19, Steam Generator Blowdown Radiation Monitor reaches its WARNING setpoint?
A. Causes NO automatic actuations on either unit. The R19 warning setpoint is an early warning function only.
B. On Unit 1, causes NO automatic actions. On Unit 2, will automatically close ALL GB10s, GB185s, and 2GB50.
C. On Unit 2, causes NO automatic actions. On Unit 1, will automatically close ALL GB10s, GB185s, and 1GB50.
D. On Unit 1, closes ALL GB4s, GB8s, GB10s, GB185s, and 1GB50. On Unit 2, isolates blowdown from the affected SGs by closing the associated GB4.
▶ Show Answer & Explanation
✓ B. Correct. The warning setpoint on Unit 1 does not result in any automatic actuations. The warning setpoint on Unit 2 will close 21-24GB10, 21-24GB185, and 2GB50.
✗ A. Plausible because the warning does not have any automatic functions on Unit 1 and the candidate may believe this is true for both Units. Incorrect as automatic actions do occur on Unit 2.
✗ C. Plausible because the candidate may forget which Unit has or does not have automatic actuations at the warning setpoint. Incorrect as this is opposite of the actual correct answer.
✗ D. Plausible because these statements are correct for the "ALARM" setpoint. Candidate may confuse warning & alarm actions.
Ref: S1(2).OP-AB.RAD-0001(Q), Abnormal Radiation | LO: N/A | Source: Bank, Salem Vision Database | Cognitive: Fundamental
Connections
- Related systems: Radiation Monitoring, Steam Generator & Blowdown
- Related procedures: AB.RAD-0001 — Radiation Monitor Abnormality
- Related exam: 2020 NRC Written Exam