Shared Flashcard Set

Details

Off Gas Storage (OGS)
BWR Systems
17
Other
Not Applicable
07/06/2012

Additional Other Flashcards

 


 

Cards

Term
OGS

Describe the function of OGS.
Definition
-Allow for decay of radionuclides (Xenon/Krypton) prior to release.
-Remove particulates and iodine from off gas stream.
-Long term hold up for unusually high rad levels or event.
-Controlled release of decayed off-gas.
Term
OGS

Describe the compressor cycling pressures and alarms.
Definition
-Loads at 5"Hg vac.
-Unloads at 10.2" Hg vac.
-High vac alarm at 2" Hg vac.
-Low vac alarm at 13.2" Hg vac.
-Controls 42"(30min) hold up line pressure (10.4 - 12.5 psia).
Term
OGS

Describe the compressor suction filter purpose and alarms.
Definition
-Remove particulate and iodine.
-10" H2O.
Term
OGS

Describe the compressor low oil pressure trip setpoint.
Definition
-18psig.
-Bypassed for 15secs on s/u.
Term
OGS

Describe the compressor temp alarms/trips.
Definition
-Discharge temp of 150F causes alarm.
-2nd stage discharge temp of 375F causes alarm and compressor trip.
Term
OGS

Describe compressor sealing air.
Definition
-Normally supplied by plant air system.
-Backed up by sealing air compressors.
Term
OGS

Describe sealing air compressor low pressure alarm setpoint.
Definition
20psig.
Term
OGS

Describe the sealing air compressor inner high pressure setpoint.
Definition
10psig.
Term
OGS

Describe the full tank alarms and interlocks.
Definition
-280psig get alarm on C-07.
-285psig get alarm on C-252 and compressor trips.
-310psig get alarm on C-252 and white light on C-07.
Term
OGS

Describe tank storage requirements and timers.
Definition
-Normally fill for 12 hours.
-Placed in store cannot discharge for time of timer (set at 12 hours).
-Normally let sit for 36 hours and set discharge rate at 12 hours.
Term
OGS

Describe function of radioactive liquid drainage system.
Definition
Collects, stores and transfers for disposal the liquid leakage and moisture condensation from components in OG system.
Term
OGS

Describe the compressor power supplies.
Definition
MCC-115/124.
Term
OGS

Describe OG storage tank interlocks.
Definition
-Prevent simultaneous opening of both fill and discharge valves on same tank.
-Prevent opening of discharge on tank until 12 timer is up.
Term
OGS

Describe the compressor trips.
Definition
-2nd stage temp at 375F.
-Compressor oil pressure < 18psig.
-Motor overload.
-Hydrogen analyzer INOP or >4% H2 with desuperheater condenser outlet (AO-7557A/B) open.
Term
OGS

Describe the chiller trips.
Definition
-Freon compressor suction < 10psig or discharge > 250psig.
-Oil pressure < 11psig.
-Chilled water < 35F.
-Motor overload.
Term
OGS

Describe the aux compressor trips.
Definition
-Sealing air compressor discharge temp > 115F.
-Motor overload.
Term
OGS

Describe teh off gas discharge solenoid valve trips.
Definition
Off gas temp discharge station < 32F.
Supporting users have an ad free experience!