ML20170A410

Independent Spent Fuel Storage Installation Updated Decommissioning Safety Analysis Report, DSAR-8.2, Rev. 0, Electrical Systems Network Interconnections

ML20170A410
Person / Time
Site:	Fort Calhoun, 07100256
Issue date:	04/30/2020
From:	Omaha Public Power District
To:	Office of Nuclear Reactor Regulation, Office of Nuclear Material Safety and Safeguards
Shared Package
ML20170A380	List: LIC-20-0005, Independent Spent Fuel Storage Installation, Technical Specification Basis ML20170A382 ML20170A383 ML20170A384 ML20170A385 ML20170A387 ML20170A388 ML20170A389 ML20170A390 ML20170A391 ML20170A392 ML20170A393 ML20170A394 ML20170A395 ML20170A396 ML20170A397 ML20170A398 ML20170A399 ML20170A400 ML20170A401 ML20170A402 ML20170A403 ML20170A404 ML20170A405 ML20170A406 ML20170A408 ML20170A409 ML20170A410 ML20170A411 ML20170A412 ML20170A414 ML20170A415 ML20170A416 ML20170A417 ML20170A418 ML20170A419 ML20170A420 ML20170A421 ML20170A422 ML20170A423 ML20170A424 ML20170A425 ML20170A426 ML20170A427 ML20170A428 ML20170A429 ML20170A430 ML20170A431 ML20170A432 ML20170A433 ... further results
References
LIC-20-0005
Download: ML20170A410 (5)

Text

Page 1 of 5 DSAR 8.2 Electrical Systems Network Interconnections Rev 0 Safety Classification: Usage Level:

Safety Information Change No.: EC 69283 Reason for Change: This section is being updated to reflect the permanent cessation of operations of Fort Calhoun Station. The contents of this section have been changed to remove any information which is not applicable during decommissioning.

Preparer: T. McDonald Fort Calhoun Station

DSAR-8.2 Information Use Page 2 of 5 Network Interconnections Rev. 0 Table of Contents 8.2 Network Interconnections ............................................................................................. 4 8.2.1 Deleted............................................................................................................... 4 8.2.2 Station Service Power Supply ............................................................................ 4

DSAR-8.2 Information Use Page 3 of 5 Network Interconnections Rev. 0 List of Figures The following figures are controlled drawings and can be viewed and printed from the listed aperture card.

Figure No. Title Aperture Card 8.2-1 Electrical Network Interconnections .................................................. 36564 8.2-2 Transmission Line Routing ............................................................... 36565

DSAR-8.2 Information Use Page 4 of 5 Network Interconnections Rev. 0 8.2 Network Interconnections The station is supplied by the 345-kV and 161-kV transmission systems through the substation located at the plant site. Figure 8.2-1 is a one-line diagram of the transmission system in the vicinity of the plant site.

8.2.1 Deleted 8.2.2 Station Service Power Supply The 345-kV and the 161-kV lines entering the switchyard are shown in Figure 8.2 2.

The 345 kV substation switching power (breaker control and operation) is provided by one of two batteries.

Each battery is connected to a battery charger fed from the switchyard 13.8 KV distribution system in normal and emergency operation.

The 161-KV substation uses two batteries in an arrangement similar to the 345-KV substation where both the normal and emergency battery charger power feed are from the switchyard 13.8-KV distribution system.

The 345-kV line 3423 and 161-kV line 1587 run from the switchyard to the plant. The points of minimum separation between the two lines, including one crossing, were established by the location of the main generator step up transformer and the two station 161 kV to 4.16 kV transformers, and by the orientation of equipment in the switchyard.

In all, 345-kV line 3423 crosses 161-kV line 1587 at one location. Should a failure of either a conductor or shield wire on the 345-kV line occur the 161 kV line breakers would trip, thus preventing damage to electrical equipment.

Power for the 4.16-kV station auxiliary system is available from two separate systems, either of which has sufficient capacity for plant auxiliaries. One source is the 22-kV bus, which is connected to disconnect switch, DS-T1, and the 22-345 kV generator transformer; the other source is the 161-kV system.

Three 161-kV transmission lines connect the on-site 161-kV switchyard using a breaker and a half scheme to OPPDs 161-kV system via Substation 1297, OPPD Substation 1305 (at Cargill) and OPPD Substation 1298. The 161-kV system is also connected to the 345-kV system via two 345-kV to 161-kV autotransformers located in the FCS switchyard.

DSAR-8.2 Information Use Page 5 of 5 Network Interconnections Rev. 0 Auxiliary power is provided by the 345-kV system via the main transformer and the 22-4.16-kV auxiliary transformers.

Should loss of offsite power occur, undervoltage relays together with auxiliary relays will operate to trip bus loads.

Protective relays will operate through lockout relays to disconnect buses 1A3 and 1A4 from a fault on circuit 1587 or the associated 161-kV to 4.16-kV transformers. Restoration of 4.16-kV power is manually performed in the event of a loss of power..

A 13.8-kV power system is available from the 13.8-kV Distribution system to provide power to plant auxiliaries.