Term
OGS
Describe the function of OGS. |
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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. |
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Term
OGS
Describe the compressor cycling pressures and alarms. |
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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). |
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Term
OGS
Describe the compressor suction filter purpose and alarms. |
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Definition
-Remove particulate and iodine.
-10" H2O. |
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Term
OGS
Describe the compressor low oil pressure trip setpoint. |
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Definition
-18psig.
-Bypassed for 15secs on s/u. |
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Term
OGS
Describe the compressor temp alarms/trips. |
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Definition
-Discharge temp of 150F causes alarm.
-2nd stage discharge temp of 375F causes alarm and compressor trip. |
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Term
OGS
Describe compressor sealing air. |
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Definition
-Normally supplied by plant air system.
-Backed up by sealing air compressors. |
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Term
OGS
Describe sealing air compressor low pressure alarm setpoint. |
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Definition
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Term
OGS
Describe the sealing air compressor inner high pressure setpoint. |
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Definition
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Term
OGS
Describe the full tank alarms and interlocks. |
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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. |
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Term
OGS
Describe tank storage requirements and timers. |
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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. |
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Term
OGS
Describe function of radioactive liquid drainage system. |
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Definition
| Collects, stores and transfers for disposal the liquid leakage and moisture condensation from components in OG system. |
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Term
OGS
Describe the compressor power supplies. |
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Definition
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Term
OGS
Describe OG storage tank interlocks. |
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Definition
-Prevent simultaneous opening of both fill and discharge valves on same tank.
-Prevent opening of discharge on tank until 12 timer is up. |
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Term
OGS
Describe the compressor trips. |
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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. |
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Term
OGS
Describe the chiller trips. |
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Definition
-Freon compressor suction < 10psig or discharge > 250psig.
-Oil pressure < 11psig.
-Chilled water < 35F.
-Motor overload. |
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Term
OGS
Describe the aux compressor trips. |
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Definition
-Sealing air compressor discharge temp > 115F.
-Motor overload. |
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Term
OGS
Describe teh off gas discharge solenoid valve trips. |
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Definition
| Off gas temp discharge station < 32F. |
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