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Exams > 2018 Q83 — Unplanned Gaseous Release / Gas Decay Tank Rad Monitor

2018 Q83 — Unplanned Gaseous Release / Gas Decay Tank Rad Monitor

⚠️ DRAFT
Q83 — Unplanned Gaseous Release / Gas Decay Tank Rad Monitor 060 Accidental Gaseous-Waste Release-AA2.04 (3.4)
Given:
• An unplanned gaseous radioactive release from the 11 Gas Decay Tank is in progress

Which ONE of the following completes the statements below?

An alarm on _(1)_ will alert the crew to the unplanned gaseous radioactive release.

The crew will perform S1.OP-AB.RAD-0001 (Abnormal Radiation) _(2)_ to ensure the unplanned gaseous radioactive release is stopped.

NOTE:
• S1.OP-AB.RAD-0001 Attachment 1 (Process Radiation Monitors)
• S1.OP-AB.RAD-0001 Attachment 2 (Process Filter Radiation Monitors)
A. _(1)_ 1R12A-B (Cont or Vent Gas Effluent/Iodine)    _(2)_ Attachment 1
B. _(1)_ 1R41D (Plant Vent Noble Gas Release Rate)    _(2)_ Attachment 1
C. _(1)_ 1R12A-B (Cont or Vent Gas Effluent/Iodine)    _(2)_ Attachment 2
D. _(1)_ 1R41D (Plant Vent Noble Gas Release Rate)    _(2)_ Attachment 2
▶ Show Answer & Explanation
✓ B. Correct. For Part 1, the 11 GDT discharges to the plant vent. Consequently, an alarm on R41D will alert the crew to the unplanned gaseous radioactive release. For Part 2, the crew will perform S1.OP-AB.RAD-0001 (Abnormal Radiation) Attachment 1 to ensure the unplanned gaseous radioactive release is stopped.
✗ A. For Part 1, 1R12A-B is a gaseous process radiation monitor. Consequently, the candidate could incorrectly conclude that an alarm on 1R12A-B (Cont or Vent Gas Effluent/Iodine) will alert the crew to the unplanned gaseous radioactive release. Part 2 is correct.
✗ C. For Part 1, 1R12A-B is a gaseous process radiation monitor. Consequently, the candidate could incorrectly conclude that an alarm on 1R12A-B (Cont or Vent Gas Effluent/Iodine) will alert the crew to the unplanned gaseous radioactive release. For Part 2, most gaseous systems have some type of filter arrangement. Consequently, the candidate could incorrectly conclude that 1R41D monitors a filter and S1.OP-AB.RAD-0001 (Abnormal Radiation) Attachment 2 will be used to ensure the unplanned gaseous radioactive release is stopped.
✗ D. Part 1 is correct. For Part 2, most gaseous systems have some type of filter arrangement. Consequently, the candidate could incorrectly conclude that 1R41D monitors a filter and S1.OP-AB.RAD-0001 (Abnormal Radiation) Attachment 2 will be used to ensure the unplanned gaseous radioactive release is stopped.
Ref: S1.OP-AB.RAD-0001 | LO: NOS05ABRAD1-06 (ABNORMAL RADIATION) — 2. Describe, in general terms, the actions taken in S2.OP-AB.RAD-0001 (Q) and the bases for the actions in accordance with the Technical Bases Document | Source: New | Cognitive: Higher

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