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Exams > 2022 Q60 — Hydrogen Recombiner Power Setting

2022 Q60 — Hydrogen Recombiner Power Setting

⚠️ DRAFT
Q60 — Hydrogen Recombiner Power Setting 028 A4.01 (4.0)
Given:

• A LOCA has occurred
• 21 Hydrogen Recombiner is inoperable
• The crew is preparing to place 22 Hydrogen Recombiner in service
    ○ Containment Temperature PRIOR to the LOCA was 90°F
    ○ Containment Temperature is currently 120°F
    ○ Containment pressure peaked at 10 psig
    ○ Containment pressure is currently 5 psig as indicated on 2PI-948A

Which ONE of the following completes the statement below?

The crew will set the 22 Hydrogen Recombiner Power Setting to _____ KW.

REFERENCE PROVIDED
A. 62
B. 60
C. 54
D. 52
▶ Show Answer & Explanation
✓ C. Correct. IAW S2.OP-SO.CAN-0001, Attachment 1 and 2, for 22 Hydrogen Recombiner the power setting is calculated as follows: Power Correction factor (Cp) x Reference Power = Recombiner Power Setting; Cp at 5 psig and 90°F (Cp=1.24) and Reference Power = 42.63 KW; therefore Power Setting = 1.24 x 42.63 = 52.86 KW; per step 5 of Attachment 1 round off to next higher setting which can be read on meter which would be 54 KW.
✗ A. This is power setting if you use Cp at 10 psig and 90°F (Cp=1.425). 1.425 x 42.63 = 60.74 KW or rounded off the next higher setting would be 62 KW.
✗ B. This is power setting if you use Cp at 10 psig and 120°F (Cp=1.4). 1.4 x 42.63 = 59.68 KW or rounded off the next higher setting would be 60 KW.
✗ D. This is power setting if you use Cp at 5 psig and 120°F (Cp=1.21). 1.21 x 42.63 = 51.58 KW or rounded off the next higher setting would be 52 KW.
Ref: S2.OP-SO.CAN-0001 (R9) | Reference provided: S2.OP-SO.CAN-0001; embedded reference 22 Hydrogen Combiner Control Power Out KW Meter | LO: NOS05CONTMT-17, Obj 3.g — Describe how Hydrogen Recombiner System impacts Containment Systems during normal and abnormal conditions | Source: Modified Bank — Salem 2019 NRC RO32 | Cognitive: Comprehension/Analysis

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