ML18051B394

Proposed Tech Spec 4.7.2 Change,Revising Frequency of Periodic Station Battery Svc & Discharge Tests from 18- & 60-month Intervals,Respectively,Per SEP Topic VIII-3.A, Station Battery Capacity Test Requirements.

ML18051B394
Person / Time
Site:	Palisades
Issue date:	05/13/1985
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18051B390	List: ML18051B389 ML18051B391 ML18051B394
References
TASK-08-03.A, TASK-8-3.A, TASK-RR NUDOCS 8505170521
Download: ML18051B394 (2)

Text

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ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 PROPOSED.PAGES PROPOSED TECHNICAL SPECIFICATION CHANGE REQUEST STATION BATTERY SERVICE AND DISCHARGE TESTS May 13, 1985

~5~ 51 lB5~~ ~;g5~~~il .L-P 1 Page NU0585-0002C-NL02

4.7 EMERGENCY POWER SYSTEM PERIODIC TESTS (Contd)

b. Every three months, the specific gravity of each cell, the temperature reading of every fifth cell, the height of electrolyte, and the amount of water added shall be measured and recorded.

c. At least once per refueling cycle, during shutdown, each station battery shall be demonstrated operable by verifying that the battery capacity is adequate to supply and maintain in OPERABLE status all of the actual emergency loads for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> when the battery is subjected to a battery service test.

d. At least once every three refueling cycles, during shutdown, each station battery shall be demonstrated operable by verifying that the battery capacity is at least 80% of the manufacturer's rating when subjected to a performance discharge test. This performance discharge test shall be performed subsequent to the satisfactory completion of the required battery service test.

4.7.3 Emergency Lighting The correct functioning of the emergency lighting system outside of containment shall be verified at least once each year. The emergency lighting system inside containment shall be verified operable prior to each removal of the reactor head.

Basis The emergency power system provides power requirements for the engineered safety features in the event of a DBA. Each of the two diesel generators is capable of supplying the minimum required safeguards equipment from independent buses. (1) 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 verified by simulated loss-of-power tests during refueling shutdowns. Considering system redundancy, the specified 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 for every month and every three months is that which has been demonstrated over the years to provide an indication of a cell becoming unserviceable long before it fails. The surveillance specified for each refueling cycle and for every three refueling cycles will provide an adequate demonstration of batter capacity. The battery service test will verify that the battery capacity is adequate to deliver the design requirements of its connected emergency de load. The battery discharge test will verify that the battery capacity is at least 80% of the manufacturer's rating. Results of these tests reflect all factors which determine battery capability.

References (1) FSAR, Section 8.4 Proposed TS0585-0002D-NL02