SALEM
SALEM STUDY SYSTEM
Systems > Spent Fuel Pool

Spent Fuel Pool

⚠️ DRAFT

Spent Fuel Pool

Function

Provides storage and cooling for spent fuel assemblies. Includes SFP cooling and cleanup system.

Spent Fuel Pool Cooling System

Removes decay heat from spent fuel stored in the spent fuel pool. Maintains pool water temperature and clarity. Two cooling trains per unit with heat exchangers cooled by CCW. (UFSAR 9.1.3)

Anti-Siphon Design Features

Exam — 2020 Q62
The SFP is designed to prevent fuel from becoming uncovered due to loss of system integrity: SFP cooling pump suction is approximately 4 feet below the pool surface (inlet located above the top of fuel). The SFP pump return line discharges approximately 6 feet above the top of the fuel assemblies. A 1/2 inch anti-siphon hole located below the pool surface on the discharge (return) pipe prevents draining due to return line failure. The anti-siphon hole is on the return (discharge) line, NOT on the suction pipe. There are no drain lines in the spent fuel pit. There are no check valves on the pump discharge or low-level cut-off switches.

SFP Routine Makeup Water Sources

Exam — 2018 Q33
Per S2.OP-SO.SF-0001, the following water sources are allowed for ROUTINE makeup to the Spent Fuel Pool: 1) Demineralized Water System, 2) Primary Water Storage Tank, 3) CVCS Holdup Tanks, 4) Refueling Water Storage Tank. The Fresh Water and Fire Protection Water Storage Tank is NOT an allowed ROUTINE makeup source.

SFP Alarms and Level Setpoints

Exam — 2018 Q92
SFP Low Level alarm setpoint: 128 feet, 0 inches. Per S2.OP-AB.SF-0001, when the pool is boiling (212 °F) and level is at the Low Level alarm, the crew must initiate makeup until the HI LEVEL ALARM actuates — not just until the LOW LEVEL ALARM clears (which occurs at 128 feet, 2 inches). Both S2.OP-SO.SF-0006 (Emergency Fill) and S2.OP-SO.SF-0001 (Fill and Transfer) are acceptable procedures for restoring level.

Connections