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CONVERSION OF INDIAN POINT UNITS 2 & 3 TO A CLOSED-LOOP COOLING WATER CONFIGURATION Attachment 5

Attachment 5 Electrical Distribution Model Output Reports

Section 1:

ETAP Results Evaluation

Section 2:

One Line Diagrams

CONVERSION OF INDIAN POINT UNITS 2 & 3 TO A CLOSED-LOOP COOLING WATER CONFIGURATION Attachment 5, Section 1: ETAP Results Evaluation Purpose:

This attachment is provided to model the anticipated electrical distribution system required to support the conversion of Indian Point Units 2 and 3 to a closed loop condenser cooling water configuration using ETAP 7.0.0C electrical analysis software. This analysis will account for the expected electrical parasitic losses due to the new components required for the proposed cooling towers. The following documents are included in this attachment (for Indian Point 2 and Indian Point 3): 

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138kV One Line Distribution with short-circuit contributions One Line Distribution for 6.9kV and below with expected parasitic loads ETAP Load Flow results for Full-Load Hybrid Operation and Wet Load Operation ETAP Short Circuit results showing fault contributions from each bus

Methodology:

Analytical evaluations for the anticipated distribution system required to power the proposed cooling towers were done by the use of ETAP 7.0.0C. The ETAP model that was used in the 2003 study was converted from ETAP version

CONVERSION OF INDIAN POINT UNITS 2 & 3 TO A CLOSED-LOOP COOLING WATER CONFIGURATION Attachment 5, Section 1: ETAP Results Evaluation 138kV bus are shown on page 73 of the ETAP Short-Circuit output report and are included in the One Line Distribution shown on page 4 of this analysis. 

Short-Circuit contributions with each bus faulted for Unit 2 and Unit 3 proposed cooling tower loads (6.9kV and lower). This configuration also shows contributions from parasitic loads (booster pumps, wet fans, and dry fans) as well.

Table 1: Short-Circuit ratings for Buchanan 138kV utility MVAsc

X/R

kAsc

3‐Phase

3998

31.25

16.726

1‐Phase

1132

11.84

4.736

Assumptions:

The software model was developed and run using the following assumed parameters: 

Motors, cables, and transformer characteristics were sized based upon preliminary vendor information of tower configuration and required horsepower. Subsequent analytical parameters were assumed based

CONVERSION OF INDIAN POINT UNITS 2 & 3 TO A CLOSED-LOOP COOLING WATER CONFIGURATION Attachment 5, Section 1: ETAP Results Evaluation buses and Unit 2 and 3 tower loads distribution. Reviewing the one line diagrams, the current load on the faulted buses by IPEC is 16.73 kA. The additional loads added by conversion to closed-loop cooling would increase this load by 1.75kA, or approximately 10%. Per discussions with site personnel, the faulted bus has a capacity on the order of 60kA, supplying significant margin against a short-circuit event. Due to the magnitude of this margin, and due to the relatively small increase of load, no modifications to the switchyard would be expected by conversion of IPEC to closed-loop cooling; however, additional electrical distribution analysis would be required in the detailed design phase to completely ensure adequate margin is present.

CONVERSION OF INDIAN POINT UNITS 2 & 3 TO A CLOSED-LOOP COOLING WATER CONFIGURATION Attachment 5, Section 2: One Line Diagrams

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CONVERSION OF INDIAN POINT UNITS 2 & 3 TO A CLOSED-LOOP COOLING WATER CONFIGURATION Attachment 5, Section 2: One Line Diagrams

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CONVERSION OF INDIAN POINT UNITS 2 & 3 TO A CLOSED-LOOP COOLING WATER CONFIGURATION Attachment 5, Section 2: One Line Diagrams

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