ML18081B247
| ML18081B247 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 03/17/1980 |
| From: | Public Service Enterprise Group |
| To: | |
| Shared Package | |
| ML18081B245 | List: |
| References | |
| NUDOCS 8003260635 | |
| Download: ML18081B247 (3) | |
Text
PROPOSED CHANGE D.C. SOURCES SALEM UNIT NO. 1 TECHNICAL SPECIFICATIONS Description of Change Changing the individual cell voltage minimum value for surveillance requirements of the 125 Volt and 28 Volt vital batteries.
Reason for Change The objective of this change is to align the battery surveillance requirements with realistic operating conditions of a lead-calcium acid storage battery.
The existing higher value of the individual cell voltage places an unnecessary restriction on the operability status of the 125 Volt and 28 Volt D.C. systems.
After performing any of,the surveillance tests that require a discharge of the batteries, one or two cells in each battery group may not get back to the 2.17 volt level as quickly as the rest of the cells, reaching 2.'16 Volts in the same time but requiring extraordinary means to reach 2.17 Volts.
This change to an individual cell voltage of 2.13 Volts minimum will insure a batteries' operability while reducing the man-hours presently required to accomplish the same objective at the higher individual cell voltage.
Safety Evaluation The present ipdividual cell voltage of 2.17 Volts minimum is conservative and is in excess of IEEE-450 as well as manufacturer's recommendations.
The individual cell voltage of 2.13 Volts minimum does not reduce the performance of the 125 Volt D.C. or 28 Volt D.C. vital buses.
Even if each of the 60 cells on a 125 Volt battery were to reach this minimum value of 2.13 V/cell, the battery would still be at 127.8 Volts.
Similarly, if each of the 13 cells in a 28 Volt battery were to reach this minimum of 2.13 V/cell, the battery would still be at 27.69 Volts which is in excess of Technical Specifications.
gOOS260 b3f:'T
"\\I....
. e Sheet 1 of 2 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)
- 2.
The pilot cell specific gravity, corrected to 77°F, and full electrolyte level, is~ 1.200.
- 3.
The pilot cell voltage is*~ 2.08 volts.
- 4.
The overall battery voltage is~ 27 volts.
- b.
At least once per 92 days by verifying that:
. 2...13
~0
- l.
The voltage of each connected cell is >~volts~urudlfe!..l=r~--~--r C\\.,,j2.7 float charge and has not decreased more than~~Oits
~~
from the value observed during the original acceptance test.
- 2.
The specific gravity, corrected to 77°F and full electro-lyte level, of each connected cell is> 1.200 and has not decreased more than 0.02 from the value observed during the previous test.
- 3.
The electrolyte level of each connected cell is between the minimum and maximum level indication marks.
- c.
At least once per 18 months by verifying that:
- l.
The cells, cell plates and battery racks show no visual indication of physical damage or abnormal deterioration.
- 2.
The cell-to-cell and terminal connections are clean, tigh~,
and coated with anti-corrosion material,
- 3.
The battery charger will supply at least 150 amperes at 28 volts for at least 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
- d.
At least once per 18 months, during shutdown, by verifying that the battery capacity is adequate to supply and maintain in OPERABLE status all of the actual emergency loads for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> when the battery is subjected to a battery service test.
- e.
At least once per 60 months, during shutdown, by ve.ri fyi ng that the. battery capacity is at least 80% of the manufacturer's rating when subjected to a perfonnance discharge test. This perfonnance discharge test shall be perfonned subsequent to the satisfactory completion of the required battery service test.
SALEM-UNIT 1 3/4 8-12
I L
Page 2 of 2 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)
- b.
- 2.
The pilot cell specific gravity, corrected to 77°F and full electrolyte level, is> 1.200.
- 3.
The pilot cell voltage is~ 2.08 volts
- 4.
The overall battery voltage is ~ 125 volts.
At least once per 92 days by verifying that:
Z.13 f-~~
The voltage of each connected cell is ~volts""under:~
float charge and has not decreased more than ~volts from the value observed during the original acceptance
- l.
test.
- 2.
The specific gravity, corrected to 77°F and full electrolyte level, of each connected cell is> 1.200 and has not decreased more than 0.02 from the-:--value observed during the previous test.
- 3.
The electrolyte. level of each connected cell is between the minimum and maximum level indication marks.
c,.
At least once per 18 months by verifying that:
- 1.
The cells, ~ell plates and battery racks show no visual indication of physical damage or abnormal *deterioratio*n.
- 2.
The cell-to-cell and terminal connections are clean, tight,*
and coated with anti-corrosion material.
- 3.
The battery charger will supply at least 200 amperes at 125 volts for at least 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
- d.
At least once per 18 months, during shutdown, by verifying that the battery capacity is adequate to supply and maintain in OPERABLE status all of the actual emergency loads for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> when the battery is subjected to a battery service test.
- e.
At least once per 60 months, during shutdown, 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.
SALEM-UN IT l 3/4 8-9