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Exams > 2022 Q91 — TS POPS Inoperable MODE 4 Entry

2022 Q91 — TS POPS Inoperable MODE 4 Entry

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Q91 — TS POPS Inoperable MODE 4 Entry 002 G2.2.40 (4.7)
Given:

• Salem Unit 2 is in MODE 5 with a unit startup in progress.
• A review of surveillance paperwork found that the setpoint for POPS Channel I is out of tolerance.
• Channel I POPS has been declared INOPERABLE.

In accordance with Technical Specification 3.4.10.3, Overpressure Protection Systems, which ONE of the following statements is correct regarding MODE 4 entry?

[REFERENCE PROVIDED]
A. Mode change can be made. The channel must be restored to OPERABLE status within 7 days following the mode change.
B. Mode change can be made after a risk assessment is performed.
C. Mode change can be made. The channel must be restored to OPERABLE status within 24 hours following the mode change.
D. Mode change can NOT be made until the channel is OPERABLE.
▶ Show Answer & Explanation
✓ D. Correct. MODE 4 entry may NOT be performed. TS 3.4.10.3 action "e" states that LCO 3.0.4.b is not applicable when entering MODE 4. TS Reactor Coolant System bases also states that there is an increased risk associated with entering MODE 4 from MODE 5 with an inoperable LTOP system. It further states that performance of a risk assessment should not be applied in this circumstance. In order to make the mode change, the LTOP channel needs to be restored to operable status.
✗ A. Incorrect. Plausible because the SRO may incorrectly apply TS 3.4.10.3 action "a" and believe that you can make the mode change so long as you restore the channel within 7 days following entering Mode 4. Mode change cannot be performed until the channel is restored to operable status.
✗ B. Incorrect. Plausible because TS 3.0.4.b does allow the use of a risk assessment to make a mode change. However, this is prohibited by TS 3.4.10.3 action "e".
✗ C. Incorrect. Plausible because the SRO may incorrectly apply TS 3.4.10.3 action "b" and believe that you can make the mode change so long as you restore the channel within 24 hours following entering Mode 4. Mode change cannot be performed until the channel is restored to operable status.
Ref: TS 3.4.10.3 and bases | LO: NOS05TECHSPEC-14, Obj 14 — Describe the general component and parameter categories that are addressed by Technical Specification Sections 3/4.1 through 3/4.12 | Source: New | Cognitive: Comprehension/Analysis

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