Term
| When does shaft driven pump operate? |
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Definition
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Term
| Power supply to aux oil pump |
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Definition
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Term
| Power supply to Turning gear oil pump |
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Definition
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Term
| Power supply to Emergency Bearing oil pump |
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Definition
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Term
| When will aux oil pump auto start? |
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Definition
| With handswitch in auto, when oil header pressure falls below 201 psig. (must be manually tripped after auto start) |
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Term
| With respect to vapor extractor, when should the aux oil pump be started? Why? |
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Definition
| Two minutes before the vapor extractor to preclude drawing oil into the oil reservoir vapor extractor fan. |
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Term
| What does aux oil pump supply? |
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Definition
| Both bearing header and hydraulic operating oil header at 180 psig. |
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Term
| What does main shaft oil pump supply? |
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Definition
| Both bearing and hydrualic oil. |
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Term
| What does turning gear oil pump supply? |
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Definition
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Term
| When will turning gear oil pump auto start? |
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Definition
With handswitch in auto, when main oil pressure falls below 136 psig, providing a backup to the aux oil pump. (must be manually tripped after auto start) |
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Term
| What does emergency bearing oil pump supply? |
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Definition
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Term
| When will emergency bearing oil pump auto start? |
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Definition
| Whenever bearing header pressure falls to 21 psig. (must be manually tripped after auto start) |
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Term
| What is the indication in the control room of a loss of continuity in the emergency bearing oil pump motor start circuitry? |
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Definition
| Loss of indicating lights on C-07 |
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Term
| Purpose of the bearing lift pumps |
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Definition
| Supply high pressure oil (500 psig) to the recessed areas on the bottom halves of bearings 3, 4, 5, 6, 7 and 8; lifts the shaft approximately 2 to 5 mils. |
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Term
| When do bearing lift pumps start? |
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Definition
| At turbine shutdown and turing gear engagement, the lift pumps automatically start if sufficient suction pressure is available. |
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Term
| Describe the oil vapor extractor |
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Definition
| Takes suction from lube oil tank detraining section. Exhausted vapors and gases are discharged through a separator where gases are vented to the roof and any condensed vapors are returned through a loop seal to the oil conditioner auxiliary drain tank. |
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Term
| Purpose of steam sealing system |
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Definition
| Prevents air in leakage to condenser and radioactive steam out leakage to atmosphere. |
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Term
| During startup above 150 psig reactor pressure below approximately 50% of rated, what supplies the steam seal regulator? |
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Definition
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Term
| Above approximately 50% of rated, what supplies sealing steam? What role does steam seal regulator play at this time? |
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Definition
| Supplied from steam leakoff from the high pressure turbine seal leakoffs and steam admission valve seal leakoffs. The steam seal regulator continues in service, automatically unloading the excess steam while maintaining the seal header pressure at 4 psig. |
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Term
| How is sealing steam provided below 150 psig? |
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Definition
| A 5 inch header that branches off from the turbine bypass valves provides the steam. The steam is bypassed around the steam seal regulator. During this mode, if excess steam is being supplied, the seal regulator will automatically unload excess steam to a lower extraction point (12th stage). |
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Term
| What cools the steam packing exhauster? |
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Definition
| Condensate water. 90% of the condensate passes through the heat exhcnager. |
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Term
Purpose of steam packing exhauster exhaust blowers |
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Definition
One of two maintains exhaust header at a negative pressure (at least 10-12 inches vacuum water). |
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Term
| Where does steam packing exhauster exhaust blower discharge? |
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Definition
| 1 and three-quarter minute holdup line. |
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Term
| Power supply to #11 steam packing exhauster blower |
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Definition
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Term
| Power supply to #12 steam packing exhauster blower |
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Definition
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