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Exams > 2018 Q13 — Containment Spray NaOH Additive

2018 Q13 — Containment Spray NaOH Additive

⚠️ DRAFT
Q13 — Containment Spray NaOH Additive 026 CSS-G2.1.27 (3.9)
Given:
Which ONE of the following completes the statements below?

_(1)_ is added to Containment Spray flow to remove elemental iodine from the containment atmosphere _(2)_.
A. (1) Sodium Hydroxide    (2) ONLY
B. (1) Sodium Hydroxide    (2) and to reduce corrosion of containment components
C. (1) Hydrazine    (2) ONLY
D. (1) Hydrazine    (2) and to reduce corrosion of containment components
▶ Show Answer & Explanation
✓ B. Correct. NaOH is added to Containment Spray flow to remove elemental iodine from the containment atmosphere and to prevent corrosion of containment components.
✗ A. Part 1 is correct. For Part 2, the candidate may fail to recall that NaOH is also used to prevent corrosion of containment components.
✗ C. Hydrazine is a familiar chemical added to the RCS to scavenge oxygen. The candidate may incorrectly conclude Hydrazine is added to Containment Spray flow. For Part 2, the candidate may fail to recall that NaOH is also used to prevent corrosion of containment components.
✗ D. Hydrazine is a familiar chemical added to the RCS to scavenge oxygen. The candidate may incorrectly conclude Hydrazine is added to Containment Spray flow.
Ref: NOS05CSPRAY-06 (Containment Spray System) | LO: NOS05CSPRAY-06 — Describe the purpose and design bases of the Containment Spray System | Source: Modified Bank | Cognitive: Lower (Memory)

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