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MONTHYEARML0235405232002-12-17017 December 2002 Technical Specification Pages for Amendment Nos. 209 & 100 Modify the Note to Eliminate the Once Per 60 Months Restriction on Replacing the Battery Service Test by the Battery Modified Performance Discharge Test Project stage: Other ML0235402002002-12-17017 December 2002 License Amendments 209 and 190, Modify the Note to Eliminate the Once Per 60 Months Restriction on Replacing the Battery Service Test by the Battery Modified Performance Discharge Test Project stage: Other 2002-12-17
[Table View] |
Technical Specification Pages for Amendment Nos. 209 & 100 Modify the Note to Eliminate the Once Per 60 Months Restriction on Replacing the Battery Service Test by the Battery Modified Performance Discharge TestML023540523 |
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Site: |
McGuire, Mcguire |
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Issue date: |
12/17/2002 |
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From: |
NRC/NRR/DLPM |
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To: |
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References |
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TAC MB6233, TAC MB6234 |
Download: ML023540523 (2) |
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Category:Technical Specifications
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Text
DC Sources - Operating 3.8.4 SURVEILLANCE FREQUENCY SR 3.8.4.7 - - -...-- NOTET-------------------- -------------
S-..-.-----------------
The modified performance discharge test in SR 3.8.4.8 may be performed in lieu of the service test in SR 3.8.4.7. I Verify battery capacity is adequate to supply, and 18 months maintain in OPERABLE status, the required emergency loads for the design duty cycle when subjected to a battery service test.
I SR 3.8.4.8 Verify battery capacity is Ž_80% of the manufacturer's 60 months rating when subjected to a performance discharge test or a modified performance discharge test. AND 12 months when battery shows degradation or has reached 85% of expected life with capacity < 100%
of manufacturer's rating AND 24 months when battery has reached 85% of the expected life with capacity >
100% of manufacturer's rating McGuire Units 1 and 2 3.8.4-3 Amendment Nos. 209 & 190
DC Sources-Operating B 3.8.4 BASES SURVEILLANCE REQUIREMENTS (continued)
SR 3.8.4.6 This SR requires that each battery charger be capable of supplying 400 amps and 125 V for > 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. These requirements are based on the design requirements of the chargers (Ref. 4). According to Regulatory Guide 1.32 (Ref. 11), the battery charger supply is required to be based on the largest combined demands of the various steady state loads and the charging capacity to restore the battery from the design minimum charge state to the fully charged state, irrespective of the status of the unit during these demand occurrences. The minimum required amperes and duration ensures that these requirements can be satisfied.
The Surveillance Frequency is acceptable, given the unit conditions required to perform the test and the other administrative controls existing to ensure adequate charger performance during these 18 month intervals.
In addition, this Frequency is intended to be consistent with expected fuel cycle lengths.
SR 3.8.4.7 A battery service test is a special test of battery capability, as found, to satisfy the design requirements (battery duty cycle) of the DC electrical power system. The discharge rate and test length of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> should correspond to the design duty cycle requirements as specified in Reference 4.
The Surveillance Frequency of 18 months is consistent with the recommendations of Regulatory Guide 1.32 (Ref. 11) with the exception that it is allowable to perform the battery service test with a unit in any Mode.
This SR is modified by a Note. The Note allows the performance of a modified performance discharge test in lieu of a service test.
The modified performance discharge test, as defined by IEEE-450 (Ref.
- 12) is a simulated duty cycle consisting of just two rates; the one minute rate published for the battery or the largest current load of the duty cycle, followed by the test rate employed for the performance test, both of which envelope the duty cycle of the service test. Since the ampere-hours removed by a rated one minute discharge represents a very small portion of the battery capacity, the test rate can be changed to that for the performance test without compromising the results of the performance McGuire Units 1 and 2 B 3.8.4-6 Revision No. 36