Term
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Definition
A. Provide OSP to both units auxiliaries for normal operations.
B. Provide OSP to each protection and safety systems during abnormal and accident conditions |
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Term
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Definition
Operability of the AC and DC Power sources and associated distribution systems during operation ensures sufficient power supplying safety related equipment required for:
1. Safe Shutdown
2. mitigation and control of accident conditions |
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Term
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Definition
All SPT have radiators, cooling fans and oil pumps.
They are arranged in cooling groups
They have Manual/Auto operation
Auto: first group @ 70 second @85 winding temp
Manual: All cooling groups run continuously |
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Term
| Name the 13 KV north ring bs breakers and their normal alignments. |
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Definition
1-2 NC, 3-4 NC, 4-5 NC, 1-6 NC
5-6 NO, 2-3 NO |
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Term
| For the 5-6 or the 2-3 cross tie breakers to close what interlocks must be satisfied? |
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Definition
5-6: either the 1-6 or 4-5 must be open
2-3: either the 1-2 or 3-4 must be open |
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Term
| Which SPT's feed the 13KV north ring bus and what are their feed breakers? |
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Definition
#1 and #2 SPT feed the 13KV ring bus
#1 SPT feeds the 1-6 and the 1-2
Which feeds the 11SPT and the 21SPT
Group Buses
#2 SPT feeds the 4-5 and the 3-4
Which Feeds the 12SPT and the 22SPT
Group Buses |
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Term
| Which SPT's feed the 13KV South Ring bus and what breakers do they feed? |
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Definition
#3 SPT and #4 SPT
#3 SPT feed Breakers A-F (13SPT) and
A-B (24 SPT) Vital Buses
#4 SPT feed Breakers C-D (14SPT) and
D-E (23SPT) Vital Buses |
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Term
| What type of breaker is used in the 13KV Ring Bus? What are some of its characteristics? |
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Definition
13KV GE Magnablast Breaker
Similar to the 4KV version the closing springs charge upon 125 VDC Control power application and upon breaker closing.
A lack of spring charge will be alarmed in the MCR |
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Term
| What type of breaker feeds the 13KV South Bus and what are some of it characteristics? |
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Definition
13 KV Siemens SF6 style Breakers
Provide Auto and Manual SPT/Section Isolation
Local clear tube style Position indicator on the side of the cabinet |
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Term
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Definition
Static electrification causes damage to MPT:
High oil flow rates of cold oil can build up Static Charge. This could ignite the oil within the Transformer and create a Fire |
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