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Exams > 2022 Q59 — Containment IRU Operation

2022 Q59 — Containment IRU Operation

⚠️ DRAFT
Q59 — Containment IRU Operation 027 A4.03 (3.3)
Which ONE of the following completes the statement regarding operation of the Containment Iodine Removal Units (IRUs)?

The Containment IRUs should only be placed in service when directed by _(1)_ and can be operated from the _(2)_.
A. 1) the EOPs
2) Control Room OR Hot Shutdown Panel
B. 1) the EOPs
2) Control Room ONLY
C. 1) Radiation Protection
2) Control Room ONLY
D. 1) Radiation Protection
2) Control Room OR Hot Shutdown Panel
▶ Show Answer & Explanation
✓ C. Correct. Per S2.OP-SO.CBV-0001, section 4.3 note states "IRUs should only be run when iodine is present in Containment, when requested by Radiation Protection, OR at the discretion of the SM/CRS to support testing." The IRUs can only be operated from the main control room.
✗ A. Part 1 is incorrect. Plausible because the operator may believe that only EOPs give the direction to start IRUs during an accident condition. Part 2 is incorrect. The IRUs can only be operated from the control room, but plausible because equipment can be operated from the Hot Shutdown Panel.
✗ B. Part 1 is incorrect. Plausible because the operator may believe that only EOPs give the direction to start IRUs during an accident condition. Part 2 is correct.
✗ D. Part 1 is correct. Part 2 is incorrect. The IRUs can only be operated from the control room, but plausible because equipment can be operated from the Hot Shutdown Panel.
Ref: NOS05CONTMT-14, S2.OP-SO.CBV-0001 (R36) | LO: NOS05CONTMT-14, Obj 7.b — Identify and describe Control Room controls, indications, and alarms for Containment and Containment Support Systems | Source: Bank — Salem 2010 NRC RO48 | Cognitive: Fundamental/Memory

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