ML20046C386
| ML20046C386 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 07/16/1993 |
| From: | Chan T Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20046C387 | List: |
| References | |
| NUDOCS 9308100237 | |
| Download: ML20046C386 (14) | |
Text
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S UNITED STATES i%
NUCLEAR REGULATORY COMMISSION t,g
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WASHINGTON, D.C. 20555-0001 l
NEBRASKA PUBLIC POWER DISTRICT DOCKET NO. 50-298 COOPER NUCLEAR STATION AMENDMENT TO FACILITY OPFRATING LICENSE Amendment No.165 i
License No. DPR-46 I
l l
1.
The Nuclear Regulatory Commission (the Commission) has found that:
l A.
The application for amendment by Nebraska Public Power District (the licensee) dated September 2, 1992, as supplemented by letter dated June 23, 1993, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission:
C.
There is reasonable assurance:
(i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be I
conducted in compliance with the Commission's regulations; l
D.
The issuance of this license amendment will not be inimical to the
~
common defense and security or to the health and safety of the public; and E..
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
9308100237 930716 PDR ADOCK 05000298 P
~
9
. 2.
Accordingly, the license is amended by changes to the Technical Specifi-cations as indicated in the attachment to this license amendment and Paragraph 2.C.(2) of Facility Operating License No. DPR-46 is hereby amended to read as follows:
2.
Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No.165, are hereby incorporated in the license.
The licensee shall operate the facility in accordance with the Technical Specifications.
3.
The license amendment is' effective 30 days after its date of issuance.
FOR THE NUCLEAR REGULATORY COMMISSION J
Terence L. Chan, Acting Director Project Directorate IV-1 Division of Reactor Projects III/IV/V l
Office of Nuclear Reactor Regulation
Attachment:
Changes to the Technical Specifications Date of Issuance: July 16, 1993 I
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ATTACHMENT TO LICENSE AMENDMENT NO.165 FACILITY OPERATING LICENSE NO. DPR-46 l
DOCKET NO. 50-298 Replace the following pages of the Appendix A Technical Specifications with the enclosed pages. The revised pages are identified by Amendment number and contain vertical lines indicating the area of change.
REMOVE PAGES INSERT PAGES 191 191 193 193 194 194 195 195 196 196 197 197 198 198 199 199 200 200
-201, 202-201 and 202 l
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LIMITING CONDITIONS FOR OPERATION SURVEILIANCE REOUIREMENTS 3.9 AUXILIARY ELECTRICAL SYSTEM 4.9 AUXILIARY "LECTRICAL SYSTEM Aeolicability:
Applicability:
Applies to the auxiliary electrical Applies to the periodic testing power system.
requirements of the auxiliary electrical systems.
Objective:
Obiective:
To assure an adequate supply of Verify the operability of the electrical power for operation of auxiliary electrical system.
those systems required for safety.
Soecification:
Specification:
A.
Auxiliary Electrical Eculoment A.
Auxiliary Electrical Eculoment 1.
The reactor shall not be made 1.
Emerrency Buses Undervoltage Relays critical from a
Cold Shutdown Condition unless all of the a.
Loss of voltage relays following conditions are satisfied:
Once every 18 months, loss of a.
Both off-site sources (345 KV and voltage on emergency buses is 69 KV) and the startup transformer simulated to demonstrate the and emergency transformer are load shedding from emergency available and capable of buses and the automatic start automatically supplying power to the of diesel generators.
4160 Volt emergency buses IF and 1G.
b.
Undervoltage relays b.
Both diesel generators shall be 3
operable and there shall be a Once every 18 months, low
}
minimum of 48,000 gal, of diesel voltage on emergency buses is fuel in the fuel oil storage tanks.
simulated to demonstrate disconnection of the emergency c.
The 4160V critical buses IF and 1G buses from the offsite power and the 480V critical buses IF and source.
The undervoltage 1G are energized.
celays shall be calibrated once every 18 months.
1.
The loss of voltage relays and their auxiliary relays are operable.
2.
The undervoltage relays and their auxiliary relays are operable.
d.
The four unit 125V/250V batteries and their chargers shall be operable.
e.
The power monitoring system for the inservice RPS MG set or alternate source shall be operable.
I Amendment No. S0.S2,SS,95,25';, 165
-191-
LIMITING CONDfTIONS FOR OPERATION SURVEILIANCE REOUIREMENTS 3.9.B (cont'd.)
4.9.A (cont'd.)
2.
Diesel Generators 2.
Diesel Generators a.
From and after the date that one of a.
Each diesel-generator shall be the diesel generators or an asso-started manually and loaded to not ciated critical bus is made or found less than 50% of rated load for no to be inoperable for any reason, less than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> once each month to continued reactor operation is per-demonstrate operational readiness.
missible in accordance with Specifi-cation 3.5.F.1 if Specification During the monthly generator test 3.9.A.1 is satisfied, the diesel generator starting air compressor shall be checked for b.
From and after the date that both operation and its ability to diesel generators are made or found recharge air receivers.
The to be inoperable for any reason, operation of the diesel fuel oil continued reactor operation is transfer pumps and fuel oil day tank permissible only during the level switches shall be demon-succeeding 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in accordance strated, and the diesel starting with specification 3.5.F.2 if time to reach rated voltage and Specification 3.9.A.1 is satisfied.
frequency shall be logged, c.
From and after the date that one of b.
Once every 18 months the condition the diesel generators or assceinted under which the diesel generator is critical buses and either the emer-required will be simulated and a gency or startup transformer power test conducted to demonstrate that source are made or found to be it will start and accept the inoperable for any reason, continued emergency load within the specified reactor operation is permissible in time sequence. Ihe results shall be accordance with Specification logged.
3.5.F.1, provided the other off-site source, startup transformer or emer-c.
Once a month the quantity of diesel gency transformer is available and fuel available shall be logged, capable of automatically supplying power to the 4160V critical buses d.
At least once per month the and the NRC is notified within 24 particulate concentration level of hours of the occurrence and the the Diesel Fuel Oil Storage Tanks plans for restoration of the shall be determined in accordance inoperable components.
with ASTM D2276-1989, Method A.
The total particulate concentration in d.
From and after the date that the the diesel fuel oil storage tanks, diesel fuel oil particulate shall have a limit of less than concentration level defined in 10 mg/ liter when checked in Surveillance Requirement 4.9.A.2.d accordance with ASTM-D2276-1989, cannot be met, restore the diesel Method A.
fuel oil total particulate concentration to within the e.
New fuel oil sampling vill be acceptable limits within 7 days, or performed in accordance with declare the associated Diesel ASTM-D4057-1989 within 30 days upon Generator inoperable.
delivery. Fuel oil testing will be performed in accordance with the e.
From and after the date that the new following:
l diesel fuel oil properties defined in Surveillance Requirement 1.
By verifying in accordance with the tests specified in
- 4. 9. A.2.e.2 cannot be met, restore ASTM-D975-1989a prior to i
the stored diesel fuel oil addition to the storage tanks properties to within acceptable that the sample has:
limits within 30 days, or declare I
the associated Diesel Generator a)
An API Gravity of within j
O.3de[reesat60'F, ora
,pecig c gravity of within 0.0016 at 60/60*F, AmendmentNo.S0g,S?,95,105,125,122,
-193-
4 LIMITING CONDITIONS FOR OPERATION SURVEILIANCE REOUIREMENTS 3.9.B 4.9.A (cont'd.)
t when compared to the supplier's certificate, or an absolute-specific gravity at 60/60*F of greater than or equal to 0.83 but less than or equal to 0.89, or an API gravity of greater than or equal to 26 degrees but less than or equal to 38 degrees; b)
A Kinematic viscosity at 40'C of greater than or equal ' to 1.9 centistokes, but less than or equal'to 4.1 centistokes (alternately.
Saybolt viscosity,han SUS at 100'F of greater t or equal to 32.6, but less dan or equal t.
40.1), if gravity was-not determined by comparison within supplier's certification; c)
' A flash point egual to or
-l greater than 125 F; l
d)
A clear and bright appearance with proper color when tested in accordance with i
ASTM-D4176-1991.
Failure to meet any of the above limits specified in e.1 above is cause for rejecting the new fuel' oil-but does not represent a stored diesel fuel oil concern since this fuel has not been-added to the storage. tanks.
2.
By verifying within 30 days of obtaining the sample that the other-properties specified in i
Table 1 of ASIM-D975-1989a are met when tested in accordance with ASTM-D975-1989a except that -
the analysis for sulfur may be performed in accordance with ASTM-D1552-1990 or ASTM-D2622-1992.
f.
At least once per month check for and remove-accumulated water from the diesel generator fuel oil day tanks.
l g.
At least once per month check for and remove accumulated water from the i
diesel generator fuel oil storage tanks.
h.
At least once per 18 months, during '~
~
shutdown, each diesel generator shall be given an inspection in accordance with instructions based on the manu-facturer's recommendations.
Amendment No.165
-194
f LIMITING CONDITIONS FOR OPERATION SURVEILIANCE REOUIREMENTS 3.9.B (cont'd.)
4.9.A (cont'd.)
t 3
DC Power 3.
DC Power a.
From and after the date that one of a.
Every week, the following parameters the four unit 125 volt or 250 volt shall be verified:
batteries is made or found to be.
inoperable for any reason, restore 1.
The parameters of each desig-the inoperable battery to OPERABLE nated pilot cell meet the Cat-status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be_in at egory A limits in Table 3.9.1.
least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within 2.
The total terminal voltage for-i the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
each 125-volt battery is greater than or equal to 125 volts on float charge, and for each 250-volt battery the -
terminal voltage is greater than or equal to 250 volts on.
float charge, b.
Every quarter, and within 7. days after a battery discharge causing battery terminal' voltage below 105 volts for a 125-volt battery or.
210 volts for a 250-volt battery, or battery overcharge with battery ter-minal voltage above 140 volts for a 125-volt battery or 280 volts for a r
250-volt
- battery, it shall be verified that:
1.
The parameters for cell-to-cell meet the -Category B
limits in Table 3.9.1.
I 2.
There is no abnormal corrosion at either terminal or connec-tors which could affect con-nection. resistance,_or'the bar connection resistance of these
. items is less than or equal to 150 x 10 ohm, and the inter-rack cable connection resis-tance shall be less than or equal to 280 x 10-' ohn.
3.
The electrolyte temperatures l
in a representative sampleLof_
- cells, has-an
-average' temperature of at-least 70*F.
l c.
Once each operating cycle.
1.
The cells, cell plates, and battery racks _
shall be visually inspected.
' Amendment' No. 32, S 2, S S,10':, n2,1",165 -
-195-J 1
LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS 3.9.B.3 (cont'd.)
4.9.A.3 (cont'd).
b.
From and after the date that a unit 2.
The cell-to-cell and terminal battery charger is made or found to connections shall be verified be inoperable, restore the inoper-to be clean, tight, and free able battery charger to OPERABLE of corrosion, and coated with status or replace with the spare anti-corrosion material.
battery charger within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least HOT SHUTDOWN within the 3.
The resistance of each cell-next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COID SHUTDOWN to-cell and terminal bar within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
connection shall be verified to be less than or equal to 150 x 10-' ohm, and the inter-rack cable connection resistance shall be verified to be less than or equal to 280 x 10-' ohm.
4.
Each 125 volt battery charger will supply 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 />, and each 250 volt battery charger will supply 200 amperes at 250 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.
Once each operating cycle, during shutdown, one of the following tests will be performed:
1.
A battery service test to verify that battery capacity is adequate to supply the emergency load profile.
2.
A performance discharge test,
- in lieu of the above service test, once every five years to verify that battery capacity is at least 90%
of the manufacturer's rating.
3.
A performance discharge test, in lieu of the above service test, when the battery shows signs of degradation or has been in service seventeen years or longer.
i l
Amendment No. 80, S2 SS 10':,122,154.165 196-
LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS 3.9.B (cont'd.)
4.9.A (cont'd).
4.
Power Monitorine System for RPS 4.
Power Monitorine System for RPS System System a.
With one RPS electric power The above specified RPS power monitoring channel for an inservice monitoring system instrumentation RPS MG set or alternate power supply shall be determined operable:
inoperable, restore the inoperable channel to operable status within a.
At least once per operating 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or remove the associated cycle by demonstrating the RPS MG set or alternate power supply operability of over-voltage, from service, under-voltage and under-frequency protective instru-b.
With both RPS electric power mentation by performance of a monitoring channel for an inservice channel calibration including RPS MG set or alternate power supply simulated automatic actuation inoperable, restore at least one to of the protective
- relays, operable status within 30 minutes or tripping logic and output remove the associated RPS MG set or circuit breakers and verifying i
alternate power supply from service.
the following set-points.
1.
Over-voltage $ 132 VAC, with time delay s 2 sec.
2.
Under-voltage 2 108 VAC, with time $elay 5 2 sec.
3.
Under-frecuency 2 57 Hz. with time delay 5 2 sec.
f
'- 10':.??O,25?,165
- 197, Amendment No, 's, o,
TABLE 3.9.1 BATTERY SURVEILIANCE REOUIREMENTS I
CATEGORY Am CATEGORY B(2)
Paraneter (WEEKLY)
(QUARTERLY)
I Limits for each Limits for each A11owablem value for f
designated pilot cell connected cell each connected cell l
l Electrolyte 2 Minimum level 2 Minimum level
, Above top of plates,
(
Level indication mark, and indication mark,
' and not overflowing 5 1/4" above maximum and 5 1/4" above level indication mark maximum level indication mark Float Voltage 22.13 volts 22.13 voltsW 22.10 volts Not more than 0.020 below the average of all connected cells Specific 21.195 W 21.190 m
Gravity Average of all con-Average of all nected cells 21.190 W connected cells 21.200 m
For any Category A parameter (s) outside the limit (s) shown, the battery may be considered OPERABLE provided that within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> all the Category B measurements are taken and found to be within their allowable values, and provided all Category A and B parameter (s) are restored to within limits within the next 6 da;es.
m For any Category B parameter (s) outside the limit (s) shown, the battery may be considered OPERABLE provided that the Category B parameters are within their allow-1 able values and provided that Category B parameter (s) are restored to within limits within 7 days.
m Any Category B parameter not within its allowable value indicates an inoperable battery.
W May be corrected for average electrolyte temperature.
m Corrected for electrolyte temperature and level.
W Or battery charger current is less than 2 amperes when on float charge.
Amendment No.M4,165
-198-
A 3.9 BASES The general objective of this Specification is to assure an adequate source of electrical power to operate the auxiliaries during plant operation, to operate facilities to cool and lubricate the plant during shutdown and to operate the engineered safeguards. following the accident.
There are three sources of ac electrical energy available; namely, the startup transformer, the emergency transformer and two diesel generators. The de supply is required for switch gear and engineered safety feature systems.
This supply consists of two 125V DC and two 250V DC batteries and their related chargers.
Specification 3.9.A states the required availability of ac and de power; i.e.,
active off-site ac sources and the required amount of on-site ac and de sources.
Auxiliary power for CNS is supplied from the startup transformer and the nomal transformer.
Both of these transformers are sized to carry 100% of the station auxiliary load. The emergency transforn'er is about one third the size of these two transformers and is equal in size to both emergency diesel generators.
The startup transformer and the emergency transformers are the offsite power sources.
t Their voltage is monitored by undervoltage relays which provide low voltage protection for the emergency buses.
Whenever the voltage setpoint and time delay limit for the undervoltage relays have been exceeded, the emergency buses are automatically disconnected from the offsite power source.
If the startup or emergency transformer is lost, the unit can continue to operate since the unit auxiliary transformer is in service, and the emergency or startup transformer and the diesels are available.
If both the startup and emergency transformers become inoperable, the power level must be reduced to a value where by the unit can safely reject the load and continue to supply auxiliary electric power to the station.
In the normal mode of operation, the startup and emergency transformers are energized and two diesel generators are operable. One diesel generator may be allowed out of service based on the availability of power from the startup transformer and the fact that one diesel generator carries sufficient engineered safeguards equipment to cover all breakers. With the startup transformer and one diesel generator at of service,.
the off site transmission line corresponding to the emergency transfomer must be available. Upon the loss of one on-site and one off-site power source, power would be available from the other immediate off-site power source and the two operable on-l site diesels to carry sufficient engineered safeguards equipment to cover all breaks.
In addition to these two power sources, removal of the Isolated Phase Bus " quick" disconnect links would allow backfeed of power through the main transformer to-the unit auxiliary transformer and provide power to carry the. full station auxiliary load.
The time required to perform this operation is comparable to the time the reactor could remain on RCIC operation before controlled depressurization need be initiated.
The condition defined in Specification 3 9.B.1.b.4 is entered as a result of failure
-l to meet the acceptance criterion for particulates. Normally, trending of particulate 1evelr. allows sufficient time to correct high particulate levels prior to reaching
.I the limit of acceptability. Poor sampling procedures (bottom sampling), contaminated sampling equipment, and errors in laboratory analysis - can produce failures that do not follow a trend. Since the presence of particulate does not _mean failure of tb fuel to burn properly in the diesel engine, the particulate concentration is unlikely to change significantly between Surveillance Frequency intervals, and proper engine performance has been recently demonstrated (within 1 month), it is prudent to allow seven day period for corrective action prior to: declario-the associated DG a
inoperable. The 7 day completion time allows for further eva b
., Wo resampling, and 4
re-analysis of the DG fuel oil.
~
LAmendment No.
,'^4,122,120,1M,165 199
3.9 BASES (cont'd)
The condition defined in Specification 3.9.B.1.b.5 is entered as a result of failure to meet the acceptance criteria for new diesel fuel properties. A period of 30 days is allowed for restoring the stored diesel fuel oil properties. This period provides sufficient time to test the stored fuel oil to determine that the new fuel oil, when mixed with previously stored fuel oil, remains acceptable, or to restore the stored fuel oil properties.
This restoration may involve feed and bleed procedures, filtering, or a combination of these procedures.
Even if a DG start and load was required during this time interval and the fuel properties were outside the limits, there is high likelihood that the DG would still be capable of performing its intended function.
The D.C. Power Systems allowable out-of-service time is based on NRC Regulatory Guide 1.93, " Availability of Electrical Power Sources."
The two-hour limit to restore battery operability minimizes reactor operation while in a degraded condition.
4.9 BASES The monthly test of the diesel generator is conducted to check for equipment failures and deterioration.
Testing is conducted up to equilibrium operating conditions to demonstrate proper operation at these conditions.
The diesel generator will be manually started, synchronized and connected to the bus and load picked up.
The diesel generator should be loaded to at least 50% of rated load to prevent fouling of the engine. It is expected that the diesel generator will be run for at least two hours. Diesel generator experience at other generating stations indicates that the testing frequency is adequate and provides a high reliability of operation should the system be required.
Each diesel generator has two air compressors and two air receivers for starting.
It is expected that the air compressors will run only infrequently. During the monthly check of the diesel generator, each receiver in each set of receivers will be drawn down below the point at which the corresponding compressor automatically starts to check operation and the ability of the compressors to recharge the receivers.
Diesel fuel oil degradation during long term storage shows up as an increase in particulate, mostly due to oxidation. The presence of particulate does not mean that the diesel fuel oil will not burn properly in the diesel engine. The particulate can cause fouling of filters and fuel oil injection equipment, however, which can cause engine failure.
Particulate concentrations shall be determined in accordance with ASTH-D2276-1989, Method A.
The frequency of this test takes into consideratior fuel oil degradation trends that indicate that particulate concentration is unlikely to change significantly between frequency intervals.
The tests for diesel fuel oil properties defined in Surveillance Requirement (SR) 4.9.A.2.e.1 are a means of determining whether new diesel fuel oil is of the appropriate grade and has not been contaminated with substances that would have an immediate detrimental impact on diesel engine combustion.
If results from the test defined in SR 4.9.A.2.e.1 are within acceptable limits, the diesel fuel oil may be added to the storage tanks without concern for contaminating the entire volume of diesel fuel oil in the storage tanks.
These tests are to be conducted prior to adding the new diesel fuel oil to the storage tanks, but in no case is the time between receipt of new diesel fuel oil and conducting the tests to exceed on month.
Within one month following the initial new diesel fuel oil sample (SR 4.9.A.2.e.1),
the new diesel fuel oil is analyzed to establish that the remaining fuel oil Amendment No. 65,75,SO,E2,95,10';,155,165 200-
4.9 BASES (cont'd) properties defined in SR 4.9.A.2.e.2 are met when tested in accordance with ASTM D975-1989a.
The one month period is acceptable because the diesel fuel oil properties of interest (SR 4.9. A.2.e.2), even if they were not within stated limits, would not have an immediate effect on Diesel Generator operation. This surveillance ensures the continued availability of high quality diesel fuel oil for the Diesel Generators.
Microbiological fouling is a major cause of diesel fuel oil degradation. There are numerous bacteria that can grow in diesel fuel oil storage tanks and cause fouling, but all must have a water environment in order to survive. Frequent checking for and removal of accumulated water minimizes fouling and provides data regarding the water tight integrity of the fuel oil system.
This is the most effective means of controlling microbiological fouling.
In addition, it eliminates the potential for water entrainment in the fuel oil during DG operation.
Water may come from any of several sources, including condensation, ground water, rain water, contaminated fuel oil, and from breakdown of the fuel oil bacteria. This surveillance requirement is for preventive maintenance.
The presence of water does not necessarily represent failure of this SR, provided the accumulated water is removed.
If the presence of water is detected by Surveillance Requirement 4.9. A.2.f the removal of water to the extent practical from the diesel fuel oil day tanks must be accomplished within two days of the discovery of the water.
If the presence of water detected by Surveillance Requirement 4.9. A.2.g is greater than a nominal value of four inches from the bottom of the diesel fuel oil storage tanks, then a maximum of seven days is allowed for removal of the water.
The nominal four inch value is a function of the water that can be practically removed from the diesel fuel oil storage tanks.
The diesel generator fuel consumption rate at full load is approximately 275 gallons per hour.
Thus, the monthly load test of the diesel generators will test the oper; tion and the ability of the fuel oil transfer pumps to refill the day tank and will check the operation of these pumps from the emergency source.
The test of the diesel generator during the refueling outage will be more comprehensive in that it will functionally test the system; i.e, it will check diesel generator starting and closure of diesel generator breaker and sequencing of load on the diesel generator.
The diesel generator will be started by simulation of a loss-of-coolant accident. In addition, an undervoltage condition will be imposed to simulate a loss of off-site power.
Periodic tests between refueling outages verify the ability of the diesel generator to run at full load and the core and containment cooling pumps to deliver full flow.
Periodic testing of the various components, plus a functional test once-a-cycle, is i
sufficient to maintain adequate reliability.
1 When it is determined that some auxiliary electrical equipment is out of service,
)
the increased surveillance required in Section 4.5.F is deemed adequate to provide j
assurance that the remaining equipment will be operable.
l The surveillance requirements for demonstrating the OPERABILITY of the unit batteries are in accordance with the recommendations of NRC Regulatory Guide 1.129, "Mainte-nance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," dated February 1978 and IEEE Std 450-1987, "IEEE Rer.ommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."
Amendment No.SO,100,166,165 201-
9 4.9 BASES (cont'd)
Once each operating cycle, during shutdown, either a service test or performance discharge is performed on the 125 V and the 250 V batteries.
The performance dis-charge test is performed in lieu of the service test when a battery shows signs of degradation. Degradation is indicated when battery capacity drops more than 10% of rated capacity from its average on previous performance tests, or is below 90% of the manufacturer's rating.
Replacement criteria for 125V and 250V station batteries is 5801 capacity factor and the maximum time for replacement should be one (1) year. This will assure that the remaining battery capacity is adequate to meet load requirements.
Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, connection resistance values and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability of the battery to handle high discharge rates and compares the battery capacity at that time with the rated capacity.
Due to the physical configuration of the CNS batteries, two different inter-cell connection resistance values are surveilled.
Each division of the 125V and 250V batteries are configured into two racks, coupled with inter-rack connectors. There-fore, separate resistance values are provided for both the inter-cell (copper-bar type) and inter-rack (cable-type) connectors to demonstrate acceptability of battery connection resistance.
Table 3.9.1 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage and specific gravity. The limits for the designated pilot cells ensure that their float voltage and specific gravity are characteristic of a charged cell with adequate capacity, and ensures the OPERABILITY and capability of the battery.
Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 3.9.1 is permitted for up to 7 days. During this 7-day period:
(1) the allowable values for electrolyte level ensures no physical damage to the plates with an adequate electron transfer capability; (2) the allowable value for the average specific gravity of all the cells, not more than 0.020 below the manufacturer's recommended full charge specific gravity, ensures that the decrease in rating will be less than the safety margin provided in sizing; (3) the allowable value for an individual cell's specific gravity ensures that an individual cell's specific gravity will not be more than 0.020 below the average specific gravity of all connected cells and that the overall capability of the battery will be maintained within an acceptable limit; and (4) the allowable value for an indivi-dual cell's float voltage, greater than 2.10 volts, ensures the battery's capability to perform its design function.
The Reactor Protection System (RPS) is equipped with a seismically qualified, Class 1E power monitoring system.
This system consists of eight Electrical Pro-tection Assemblies (EPA) which isolate the power sources from the RPS if the input voltage and frequency are not within limits specified for safe system operation.
Isolation of RPS power causes that RPS division to fail safe.
Amendment No. S0,105,165,165 202-