Q32 — Hydrogen Recombiner Power Setting
028 HRPS-K5.04 (2.6)
Given:
REFERENCES PROVIDED
• A LOCA has occurred
• 22 Hydrogen Recombiner is inoperable
• The crew is preparing to place 21 Hydrogen Recombiner in service
• Containment Temperature PRIOR to the LOCA was 90°F
• CURRENT Containment Temperature is 120°F
• CURRENT Containment pressure as indicated on 2PI-948A is 4.0 psig
Which ONE of the following completes the statement below?
The crew will set the 21 Recombiner Power setting to __ KW.
REFERENCES PROVIDED
• A LOCA has occurred
• 22 Hydrogen Recombiner is inoperable
• The crew is preparing to place 21 Hydrogen Recombiner in service
• Containment Temperature PRIOR to the LOCA was 90°F
• CURRENT Containment Temperature is 120°F
• CURRENT Containment pressure as indicated on 2PI-948A is 4.0 psig
Which ONE of the following completes the statement below?
The crew will set the 21 Recombiner Power setting to __ KW.
A. 56
B. 54
C. 52
D. 50
▶ Show Answer & Explanation
✓ B. Correct. IAW S2.OP-SO.CAN-0001 Attachment 1 and Attachment 2: Reference Power for 21 Hydrogen Recombiner is 43.68 KW. Power Correction Factor (Cp) per Attachment 2 (RECOMBINER POWER CORRECTION FACTOR CURVE) is 1.21. Power setting = Reference Power x Power Correction Factor (Cp) = 43.68 x 1.21 = 52.85 which is rounded to 54 KW.
✗ A. Incorrect but plausible. 56 KW is the calculated setting if the candidate correctly used the 21 Hydrogen Recombiner Reference Power (43.68 KW) and incorrectly read Attachment 2 to determine a Power Correction Factor (Cp) of 1.24.
✗ C. Incorrect but plausible. 52 KW is the calculated setting if the candidate incorrectly used the 22 Hydrogen Recombiner Reference Power (42.63 KW) and correctly read Attachment 2 to determine a Power Correction Factor (Cp) of 1.21.
✗ D. Incorrect but plausible. 50 KW is the calculated setting if the candidate correctly used the 21 Hydrogen Recombiner Reference Power (43.68 KW) and incorrectly read Attachment 2 to determine a Power Correction Factor (Cp) of 1.15.
Ref: S2.OP-SO.CAN-0001 Attachment 1 and Attachment 2 | Reference provided: S2.OP-SO.CAN-0001 Attachment 1 and Attachment 2 | LO: NOS05CONTMT-15 (CONTAINMENT AND CONTAINMENT SUPPORT SYSTEMS), Obj 3.g — Describe how the Hydrogen Recombiner System impacts Containment Systems | Source: Modified Bank | Cognitive: Comprehension/Analysis
Connections
- Related systems: Containment
- Related procedures: S2.OP-SO.CAN-0001 — Hydrogen Recombiner Operation
- Related exam: 2019 NRC Written Exam