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Exams > 2023 Q22 — High RCS Activity / Maximize Letdown Flow

2023 Q22 — High RCS Activity / Maximize Letdown Flow

⚠️ DRAFT
Q22 — High RCS Activity / Maximize Letdown Flow APE 76 AK3.04 (3.3)
Given:
• Unit 2 at 100%
• High RCS activity
• Performing AB.RC-0002
• Chemistry confirms elevated activity below TS limit

What is the required action?
A. Reduce letdown flow to minimize aux building exposure
B. Perform hourly RCS sampling
C. Maximize letdown flow to accelerate cleanup through demineralizers
D. Shutdown within 6 hours to minimize SGTR release potential
▶ Show Answer & Explanation
✓ C. Correct. Per S2.OP-AB.RC-0002, following confirmation of elevated activity below TS limits, maximize letdown flow to accelerate RCS cleanup through the demineralizers.
✗ A. Procedure directs increasing letdown flow, not reducing it. Maximizing letdown accelerates cleanup through demineralizers.
✗ B. Step 3.20 does direct hourly sampling, but maximizing letdown is the NEXT action and is the primary response to reduce activity.
✗ D. This is the basis for TS 3.4.9 Specific Activity, but activity is below TS limit so shutdown is not required.
Ref: S2.OP-AB.RC-0002 (R12) | LO: NOS05ABRC02-07, Obj 2 | Source: Bank - Salem | Cognitive: Comprehension/Analysis

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