ML20072D233
| ML20072D233 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 08/12/1994 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20072D237 | List: |
| References | |
| TAC-M86241, NUDOCS 9408180278 | |
| Download: ML20072D233 (2) | |
Text
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6 W ELECTRICAL POWER,jiyj;i2Dffs e
BASES 3/4.8/1 AND 3/4.8.2 A.C.
SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety-related equipment required for 1) the safe shutdown of the facility and 2) the mitigation and control of accident conditions within the facility.
The minimum specified independent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR 50.
The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources is consistent with the initial condition assumptions of the safety analyses and is based upon maintaining at least one redundant set of onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident ccnditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C.
source.
The OPERABILITY of the minimum specified A.C.
and D.C. power sources and associated distribution systems during shutdown and refueling ensures that 1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.
The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guide 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Supplies,' March 10, 1971.
The criteria of NUREG/CR 0660, " Enhancement of On Site Diesel Generator Reliability," February 1979, the manufacturer's recommendations, and operating experience have been utilized to develop a diesel reliability program which provides an extremely high confidence in diesel operability.
The surveillance test frequency is based on Regulatory Guide 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977, with adjustments made to preclude over testing which has been verified by the manufacturer to be detrimental to diesel generator reliability.
The Surveillance Requirements for demonstrating the OPERABILITY of the Station batteries are based on the recommendations of IEEE Standard 450-1980,
'IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."
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9408100278 940812 PDR ADOCK 05000348 p
PDR FARLEY-UNIT 1 B 3/4 8-1 changed by letter dated 8/12/94
s 3/4.8 ELECT E AL POWER SYSTEMS BASES 3/4.B.1 AND 3/4.8.2 A.C.
SOURCES AND CNSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety-related equipment required for 1) the safe shutdown of the facility and 2) the mitigation and control of accident conditions within the facility.
The minimum specified independent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR 50.
The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources is consistent with the initial condition assumptions of the safety analyses and is based upon maintaining at least one redundant set of onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.
The OPERABILITY of the minimum specified A.C.
and D.C. power source" associated distribution systems during shutdown and refueling ensures that 1) tr..
facility can be maintained in the shutdown or refueling condition for extenow-time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.
The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Supplies,' March 10, 1971, and 1.108, ' Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants,' Revision 1, August 1977.
The Surveillance Requirements for demonstrating the OPERABILITY of the Station batteries are based on the recommendations of IEEE Standard 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations.'
l 3/4.8.3 ELECTRICAL EOUIPMENT PROTECTIVE DEVICES
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Containment electrical penetrations and penetration conductors are protected by either deenergizing circuits not required during reactor operation or by demonstrating the OPERABILITY of overcurrent protection circuit breakers during periodic surveillance.
1 FARLEY-UNIT 2 B 3/4 8-1 changed by letter dated 8/12/94
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