Q93 — Condensate Pump Trip Actions
056A2.04 (2.8)
Given:
• Unit 2 is at 100% Power.
• All Condensate Pumps are in service.
• All Heater Drain Pumps are in service.
• The Condensate Polisher is in service.
Subsequently, 21 Condensate Pumps trips.
Complete the following statement regarding the required actions the CRS will direct in accordance with S2.OP-AB.CN-0001(Q), Main Feedwater / Condensate System Abnormality;
The CRS will direct the opening of the 21-23CN108, Polisher Bypass Valves if SGFP Suction Pressure is less than ___(1)___ and reduce Reactor Power to a MAXIMUM of ___(2)___.
• Unit 2 is at 100% Power.
• All Condensate Pumps are in service.
• All Heater Drain Pumps are in service.
• The Condensate Polisher is in service.
Subsequently, 21 Condensate Pumps trips.
Complete the following statement regarding the required actions the CRS will direct in accordance with S2.OP-AB.CN-0001(Q), Main Feedwater / Condensate System Abnormality;
The CRS will direct the opening of the 21-23CN108, Polisher Bypass Valves if SGFP Suction Pressure is less than ___(1)___ and reduce Reactor Power to a MAXIMUM of ___(2)___.
A. (1) 265 psig
(2) 75%
(2) 75%
B. (1) 320 psig
(2) 75%
(2) 75%
C. (1) 320 psig
(2) 85%
(2) 85%
D. (1) 265 psig
(2) 85%
(2) 85%
▶ Show Answer & Explanation
✓ C. Correct. S2.OP-AB.CN-0001(Q), Main Feedwater/ Condensate System Abnormality directs the opening of 21-23CN108, Polisher Bypass Valves if SGFP suction pressure is less than 320 psig. S2.OP-AB.CN-0001(Q), Attachment 2 directs a power reduction to 85% or less.
✗ A. The first part is plausible because the CN47 will control in automatic to maintain a minimum of greater than 265 psig SGFP suction pressure. Incorrect as S2.OP-AB.CN-0001(Q), Main Feedwater/ Condensate System Abnormality directs their opening if SGFP suction pressure is less than 320 psig. The second part is plausible as 75% is the power level where the third condensate pump is started in accordance with IOP-4 during a power accession.
✗ B. The first part is correct. The second part is plausible as 75% is the power level where the third condensate pump is started in accordance with IOP-4 during a power accession.
✗ D. The first part is plausible because the CN47 will control in automatic to maintain a minimum of greater than 265 psig SGFP suction pressure. Incorrect as S2.OP-AB.CN-0001(Q), Main Feedwater/ Condensate System Abnormality directs their opening if SGFP suction pressure is less than 320 psig. The second part is correct.
Ref: S2.OP-AB.CN-0001(Q), Main Feedwater/ Condensate System Abnormality and Bases. | LO: N/A | Source: New | Cognitive: Fundamental
Connections
- Related systems: Feed & Condensate
- Related procedures: AB.CN-0001 — Condensate System Abnormality
- Related exam: 2020 NRC Written Exam