Q84 — RCS Specific Activity LCO 3.0.4.c
076 High Reactor Coolant Activity - AA2.03 (3.0)
REFERENCE PROVIDED
Given:
• A plant heat up is in progress
• TAVG is 470 °F
• 2R31 (Letdown Line-Failed Fuel) is in alarm
• RCS Sampling has confirmed LCO 3.4.9 (Specific Activity) is NOT met
At time 12:00
• Periodic sampling of the RCS verifies the RCS Specific Activity is lowering but it is still above the LCO limit
In accordance with Technical Specifications, which ONE of the following completes the statement below?
The LCO 3.4.9 specific activity limit for DOSE EQUIVALENT I-131 is less or equal to a MINIMUM of _(1)_ µCi/gram.
At 12:00 and in accordance with Technical Specifications, the crew _(2)_ permitted to raise TAVG ≥ 500 °F while RCS activity is still above the LCO 3.4.9 limit.
Given:
• A plant heat up is in progress
• TAVG is 470 °F
• 2R31 (Letdown Line-Failed Fuel) is in alarm
• RCS Sampling has confirmed LCO 3.4.9 (Specific Activity) is NOT met
At time 12:00
• Periodic sampling of the RCS verifies the RCS Specific Activity is lowering but it is still above the LCO limit
In accordance with Technical Specifications, which ONE of the following completes the statement below?
The LCO 3.4.9 specific activity limit for DOSE EQUIVALENT I-131 is less or equal to a MINIMUM of _(1)_ µCi/gram.
At 12:00 and in accordance with Technical Specifications, the crew _(2)_ permitted to raise TAVG ≥ 500 °F while RCS activity is still above the LCO 3.4.9 limit.
A. (1) 1.0 (2) is NOT
B. (1) 1.0 (2) is
C. (1) 100 (2) is NOT
D. (1) 100 (2) is
▶ Show Answer & Explanation
✓ B. Correct. For Part 1 and IAW LCO 3.4.9, the LCO 3.4.9 specific activity limit for DOSE EQUIVALENT I-131 is less or equal to a MAXIMUM of 1.0 µCi/gram. For Part 2, LCO 3.0.4.c gives an allowance for LCO 3.4.9 to allow going up in MODE or other specified condition when LCO 3.4.9 is NOT met.
✗ A. Incorrect but plausible. Part 1 is correct. For Part 2, the candidate could fail to recognize or misunderstand the LCO 3.0.4.c exemption for LCO 3.4.9 and incorrectly conclude that the crew is NOT permitted to raise TAVG ≥ 500 °F while RCS activity is still above the LCO 3.4.9 limit.
✗ C. Incorrect but plausible. For Part 1, 100 µCi/gram is another limit specified in LCO 3.4.9. For Part 2, the candidate could fail to recognize or misunderstand the LCO 3.0.4.c exemption for LCO 3.4.9 and incorrectly conclude that the crew is NOT permitted to raise TAVG ≥ 500 °F while RCS activity is still above the LCO 3.4.9 limit.
✗ D. Incorrect but plausible. For Part 1, 100 µCi/gram is another limit specified in LCO 3.4.9. Part 2 is correct.
Ref: LCO 3.4.9, LCO 3.0.3 | LO: NOS05TECHSPEC-12 — Describe the general requirements associated with Specifications 3.0.1 through 3.0.6 | Source: Bank — ILOT 16-01 AUDIT SRO Q8 | Cognitive: Higher
Connections
- Related systems: CVCS, Radiation Monitoring
- Related tech specs: TS 3/4.4 — Reactor Coolant System, TS 3/4.0 — Applicability
- Related exam: 2019 NRC Written Exam