ML18047A381
| ML18047A381 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 06/25/1982 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML18047A378 | List: |
| References | |
| NUDOCS 8206290132 | |
| Download: ML18047A381 (3) | |
Text
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PROPOSED TECHNICAL SPECIFICATION CHANGES CONSUMERS POWER COMPANY PALISADES PLANT
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4.7 EMERGENCY POWER SYSTEM PERIODIC TESTS Applicability Applies to periodic testing and surveillance requirements of the emer-gency power system.
Objective To verify that the emergency power system will respond promptly and properly when required.
Specifications 4.7.1 Diesel Generators
- a.
Each diesel generator shall be manually started each month and dem-onstrated to be ready for loa~ing within 10 seconds.
The signal in-itiated to start the diesel shall be varied from one test to another to verify all starting circuits are operable.
The generator shall be synchronized from the control room, and loaded to 2400 +/- 100 kW.
- b.
A test shall be.conducted during each refueling outage to demon-strate the overall automatic operation of the emergency power system.
The test shall.be initiated by a simulated simultaneous loss of normal and standby power sources and a simulated SIS signal.
Proper operations shall be verified by bus load shedding and automatic starting of selected motors and equipment to establish that restoration with emergency power has been accomplished within 30 seconds.
- c.
Each diesel generator shall be subjected to an inspection, in ac-cordance with procedures prepared in conjunction with the manu-facturer's recommendations for this class of standby service, at least once per 18 months during plant shutdown.
The licensee shall utilize his best efforts to conduct additional major diesel gener-ator inspections and overhauls during shutdown periods.
- d.
Diesel generator electric loads shall not be, inc.reased beyond* the continuous rating of 750 amp at 2400 volts.
- e.
The fuel transfer pumps shall be verified to be operable each month.
4.7.2 Station Batteries
- a.
Every month, the voltage of each cell (to the nearest 0.01 volt),
the specific gravity and the temperature of a pilot cell in each battery shall be measured and recorded.
4-42 Proposed nu0682-0448a-43-13
- 4. 7 EMERGENCY POWER SYSTEM PERIODIC TESTS (Contd)
- b.
Every three months, the specific gravity of each cell, the tempera-ture reading of every fifth cell, the height of electrolyte, and the amount of water added shall be measured and recorded.
4.7.3 Emergency Lighting The correct functioning of the emergency lighting system shall be veri-fied at least once each year.
Basis The emergency power system provides power requirements for the engineer-ed. safety features in the event of a DBA.
Each of the two diesel gener-ators is capable of supplying minimum required safeguards equipment from independent bu~es. (l, 2)
This redundancy is a factor in establishing testing intervals.
The monthly tests specified above will demonstrate operability and load capacity of the diesel generator.
The fuel supply and various controls are continuously monitored and alarmed for abnormal
. conditions.
Starting on complete loss of off-site power will be veri-fied by simulated loss*-of-power tests at approximately yearly intervals (during refueling shutdowns).
Considering system redundancy, the speci-fied testing intervals for the station batteries should be adequate to detect and correct any malfunction before it can result in system malfunction.
Batteries will deteriorate with time, but precipitous failure is extremely unlikely.
The surveillance specified is that which has been demonstrated over the years to provide an indication of a cell becoming unserviceable long before it fails.
The emergency diesel generator limit of 750 amperes at 2400 volts corresponds to the manufacturer's nameplate kVA and kW rating of these machines.
- References (1)
FSAR, Section 8.4.1.
(2)
FSAR, Section 8.5.2.2.
4-43 nu0682-0448a-43-13 Proposed