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Details

Hydrogen Seal Oil (H2 Oil)
BWR Systems
11
Other
Not Applicable
07/16/2012

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Cards

Term
H2 Oil

Describe the dP between H2 and seal oil.
Definition
-Seal oil pressure kept 3-8psid greater than generator H2 pressure.
-Alarm at 2.5psid.
Term
H2 Oil

Describe the power supply to the emergency seal oil pump.
Definition
17 battery.
Term
H2 Oil

Describe the main seal oil pump motor and H2 seal oil vacuum pump power supply.
Definition
MCC-131
Term
H2 Oil

Describe the MSOP relief valve setpoint and what happens.
Definition
-90#.
-Recircs oil back to vacuum tank using recirc pump line.
Term
H2 Oil

Describe the auto start feature of the ESOP.
Definition
-Starts at 78#.
Term
H2 Oil

Describe any concerns when using the ESOP.
Definition
H2 purity will degrade over time since the vacuum tank is bypassed by the ESOP.
Term
H2 Oil

Describe the supply when all oil pumps cannot be used.
Definition
-Use oil from the bearing oil header.
-This is normally makeup and cooling to the seal oil.
-Gen pressure limited to 8# in this case.
Term
H2 Oil

Describe pressure control in seal oil.
Definition
dP control valve maintains seal oil press 3-8# greater then gen H2 press.
Term
H2 Oil

Describe the setpoint in the liquid detector.
Definition
-1.5 pints get alarm.
-Indicates excessive leakage past seals and float cannot keep up (float failure).
Term
H2 Oil

Describe the vacuum tank pressure and purpose.
Definition
-28"Hg.
-Remove air and moisture.
-H2 purity > 97%.
Term
H2 Oil

Describe the H2 pressure in the generator.
Definition
Roughly 45#.
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