ML13324A536
| ML13324A536 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/28/1984 |
| From: | Medford M Southern California Edison Co |
| To: | Zwolinski J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8501020315 | |
| Download: ML13324A536 (5) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 M.O.MEDFORD TELEPHONE MANAGER, NUCLEAR LICENSING December 28, 1984 (818) 302-1749 Director, Office of Nuclear Reactor Regulation Attention:
Mr. 3. A. Zwolinski, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Subject:
Docket No. 50-206 Performance Test for MOV-850C Uninterruptable Power Supply (UPS)
San Onofre Nuclear Generating Station Unit 1
References:
(1) Letter from K. P. Baskin, SCE to D. M. Crutchfield, NRC, dated August 26, 1983 (2) Letter from M. 0. Medford, SCE to D. M. Crutchfield, NRC, dated July 27, 1984 Reference 1 forwarded the results of the sixty month battery performance tests for Battery Banks 1 and 2 and the UPS. Battery Banks 1 and 2 exhibited capacities of 100% while the UPS battery bank exhibited a capacity of 84%. Based on the existing Technical Specification acceptance criterion of 80% minimum capacity, all three battery banks were determined to have acceptable capacities.
As explained in Reference 1, the UPS battery bank test results indicated a capacity of less than full capacity, due to a temporary charger configuration being used at the time of testing.
Your letter of March 9, 1984, indicated the battery bank test results had been evaluated, and due to the 84% capacity of the UPS an annual performance test is necessary in order to conform to IEEE-450, Sec. 5.2(3).
Reference 2 responded to this position and provided further justification for the acceptability of the UPS battery bank. As indicated in Reference 2, information transmitted by our August 26, 1983 letter was not intended to imply that the temporary charging configuration would maintain the battery bank in the same charged state as the normal charger. To demonstrate this 8501020315 841228 PDR ADOCK 05000206 P
Mr. J. A. Zwolinski
-2 position, a service test was performed with the normal charging system utilizing IEEE-450 acceptance criteria. During this test the UPS battery bank exhibited a capacity of 100%. Reference 2 further indicated that a performance discharge test would be conducted in accordance with IEEE-450 methods, and we would advise you of the results.
The purpose of this letter is to inform you that a performance discharge test (with the normal charging configuration) has been completed for the UPS battery bank. The enclosed test results establish that the UPS has an acceptable capacity based on the current Technical Specification acceptance criteria and IEEE-450 acceptance criteria. During the performance discharge test, the UPS battery bank for safety injection valve MOV-850C exhibited a capacity of 100%. In accordance with IEEE-450, an equalizing charge was not applied to the UPS within the seven days prior to the test. Also, checks of battery connections were not performed prior to the test. Accordingly, the performance discharge test conformed to all requirements of IEEE-450 pertaining to such tests.
Based on the acceptable test methods, and acceptable test results the UPS battery bank does not require annual performance testing. Future testing will be conducted in accordance with normal test frequencies as outlined in the Technical Specifications.
If you have any questions or desire additional information, please let me know.
Very truly yours, Enclosure cc:
F. R. Huey (USNRC Senior Resident Inspector, Units 1, 2 and 3)
AN ONOFRE NUCLEAR GENERATING STATION MAINTENANCE PROCEDURE 501-1-2.8 VNIT 1 REVISION 2 PAGE 1 OF 2 UNIT 1ATTACHMENT 9.4 MAINTENANCE DATA RECORD FORM REFUELING INTERVAL BATTERY PERFORMANCE TEST CDM File*No. CJ20CC-008-FE Battery Bank No. el #'-N M.O. No.
Prerequisites Met Signature
'Dike' Data Acceptance Recorder/Verifier Step No.
Data Description Values Criteria Signature/Date 6.1.1 Initial Average Battery N/A Temperature 6.1.30'.2 Rated Load Amperage (LAu) per Att. 9.2
///,
/
6.1.5 Battery Terminal Voltage at L125
'DC 6.1.6.1 Calculated-Load Amperage N/A ft/___
/___
(LAc) 6.1.6.5 Battery Performance Test of N/A a1 Act
/
Start Time 6.1.7.2 Performance Test Termination Data:
.2.1 Time of Completion
- 5.
N/A
.2.2 Low individual cell voltage cell no.
1761.68VDC
.2.3 Battery Terminal Voltage 2
- VDC
.2.4 Test Stopped (manually or K/A automatically
.2.5 Total Elapsed Time to Final per Att. 9.2 I.
cZde
/
/
Voltage
.2.6 Battery Cells Connected at a
hi4P Termination of Test 6.1.7.4 Calculated Battery Capacity kdo
&80%
6.1.8 Connections established in Step 6.1.1 have been returned to Pre-Test Configuration N/A 6.3.5 Restoration and Post-Maintenance Checks, Section 6.3 satisfactorily completed.
ate SignaturkDe
e a
SAN ONOFRE NUCLEAR GENERATING STATION MAINTENANCE PROCEDURE SO1-1-2.8 UNIT 1 REVISION 2 PAGE 2 OF 2 ATTACHMENT 9.4 Test Equipment SCE No.
Calibration Due Datel 3
-3 7
/-36J-y REMARKS, DI REPNCIES AND CORREC VE ACTIONS:
COMPLETED BY:
DATE:
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REVIEWED BY:
DATE: OrT 15 1984 e onsible Mat tenance Supervisor
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