ML20099J072
| ML20099J072 | |
| Person / Time | |
|---|---|
| Site: | 05000601 |
| Issue date: | 11/30/1984 |
| From: | WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | |
| Shared Package | |
| ML19269B210 | List:
|
| References | |
| NUDOCS 8503190585 | |
| Download: ML20099J072 (1) | |
Text
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l APPENDIX BA ELECTRIC POWER - INTERFACES O 8A.2 0FFSITE POWER SYSTEM
- 1. Electrical power f rom the power grid to the plant site shall be supplied by two physically independent circuits designed and located so as to minimize the likelihood of simultaneous failure, i
- 2. Each of these independent circuits shall have the capability to safely shutdown the unit. The first preferred circuit shall be connected via a main transformer and unit auxiliary transformer, and shall have the capacity to supply the startup and all the auxiliary loads (both group 1 and group 2) simultaneously.
- 3. The second preferred power circuit shall supply power to the standby O transformer and shall have the capacity to supply all the safety-related ,
I loads and all the _ auxiliary loads (both group 1 and group 2) simultaneously. In addition, an ESF transformer will be provided to supply Class lE busses only. This will require independent connection to the offsite source.
- 4. The loss of the nuclear unit or the most critical unit on the grid shall not result in the loss of offsite power to the Class 1E busses.
- 5. The switchyard power circuit breaker control shall be designed with
, duplicate and redundant systems, i.e., two independent battery systems, two trip coils per breaker, and two independent protective relay schemes.
O O i WAPWR-I&C/EP 8A.2-1 NOVEMBER, 1984 8267B:ld
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