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Exams > 2020 Q98 — Waste Gas Release Restrictions

2020 Q98 — Waste Gas Release Restrictions

⚠️ DRAFT
Q98 — Waste Gas Release Restrictions G2.3.11 (4.3)
Given:
  • Unit 1 is shutdown during a refueling outage.
  • A normal release of 14 Waste Gas Decay Tank to the plant vent is scheduled to be performed on day shift in accordance with S1.OP-SO.WG-0011, Discharge of 14 Gas Decay Tank (WGDT).

When reviewing the schedule, which of the following activities is procedurally allowed to be scheduled during the period 14 WGDT is being released?
A. Aligning Unit 2 Vent Header to Unit 1 Waste Gas Compressor suction.
B. Transfer of gas between 12 and 13 WGDTs.
C. Release of 11 WGDT.
D. Initiation of Unit 1 VCT Purge.
▶ Show Answer & Explanation
✓ D. Correct. S1.OP-SO.WG-0011 does not prohibit the purging of the VCT while a GDT release is in progress. S1.OP-SO.WG-0005(Q), VCT Purge to the Plant Vent specifically allows it (step 1 of the VCT Purge Radioactive Gaseous Release Form).
✗ A. Plausible because the candidate may believe that waste gas can be transferred between the units just like liquid waste.
✗ B. Plausible because the candidate may believe that transfers between other tanks are possible. Incorrect as the discharge procedure, S1.OP-SO.WG-0011 specifically states on P&L 3.3; "DO NOT transfer Waste Gas from one GDT to another during the GDT Release."
✗ C. Plausible because the candidate may believe that the release of more than one GDT at a time is allowed. Incorrect as the discharge procedure, S1.OP-SO.WG-0011 specifically states on P&L 3.2; "DO NOT release more than one GDT at a time."
Ref: S1.OP-SO.WG-0011(Q), Discharge of 14 Gas Decay Tank to Plant Vent and S1.OP-SO.WG-0005(Q), VCT Purge to the Plant Vent | LO: N/A | Source: Bank – Salem 2016 NRC Exam – Q98 | Cognitive: Fundamental

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