ML20117G106
| ML20117G106 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/27/1996 |
| From: | Terry C TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TXX-96451, NUDOCS 9609050020 | |
| Download: ML20117G106 (2) | |
Text
'.
.Nmmmm, Log # TXX 96451
==
File # 916 (3/4.8)
Ref. # 10CFR50.90 10CFR50.36 j
1UELECTRIC August 27, 1996
- c. Lance Terry Gmup Mce Preudem U. S. Nuclear Regulatory Commission Attn: Document Control Room Washington, DC 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50 445 AND 50 446 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION ON LICENSE i
AMENDMENT REQUEST 96-005 j
INVERTER / BATTERY CHARGER MODIFICATION REF:
1)
TV Electric letter TXX-96432 dated July 31, 1996, from C. L. Terry to the Nuclear Regulatory Commission,
" Submittal of License Amendment Request 96 005 1
pertaining to Inverter / Battery Charger Modification" l
2)
TV Electric letter TXX 96447 dated August 23, 1996, from C. L. Terry to the Nuclear Regulatory Commission,
" Response to request for additional information on License Amendment Request 96 005" 3)
Telephone conference call from Tim Polich and S. K. Mitra of Nuclear Regulatory Commission to Jacob Kulangara of TU Electric on August 26, 1996 Gentlemen:
By Reference 1 TU Electric submitted license amendment request 96 005 to amend the CPSES Unit 1 facility operating license (NPF 87) and CPSES Unit 2 facility operating license (NPF-89). These changes are associated with a plant modification in which the inverters and battery chargers are being replaced and an installed spare inverter is being added for each safety train. Also per Reference 2, TU Electric provided a response to earlier NRC questions on the license amendment request.
Per Reference 3. NRC requested additional information on the Reference 1 submittal as identified below:
Question : NRC requested TU Electric to confirm if the batteries 4
meet the following criteria described in the CPSES Final Safety Analysis Report (FSAR amendment 94) with the inverter / battery charger modification:
p 9609050020 960827
- PDR ADOCK 05000445 P
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Er.ergy Plaza 1601 Bryan Street Dallas. Texas 75201-3411
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TXX96451 Page 2 of 2 FSAR Section 8.3.2.1 states in part, "The Class 1E 125 V battery systems supply power to Class 1E loads without interruption during normal operations or DBA conditions."
FSAR Section 8.3.2.1.2.a states in part, "Each Class 1E 125 VDC system has the capacity to continuously supply all the connected normal running load while maintaining its respective battery in a fully charged condition.
Each battery is capable of carrying the essential load continuously for a period of four hours in the event of a total loss of onsite and offsite AC power."
Footnote to FSAR Tabics 8.3-4 and 8.3-48 states that, the battery loads are bounded by maximum battery sizing loads which include 15%
design margin.
Response: TU Electric confirms that the CPSES Class 1E 125 VDC system continues to satisfy the above criteria with the inverter / battery chiirger modification.
The DC system capacity as described above has been verified in calculation EE(B) 053 Revision 5 CCN No. 7 which is available for NRC review or audit.
Should you have any questions, please contact Mr. Jacob M. Kulangara at (817) 897-0124.
Sincerely, C. L. Terry By:
D. R. Woodlan Docket Licensing Manager JMK/jmk i
c-Mr. L. J. Callan, Region IV Ms. L. J. Smith, Region IV Resident Inspectors, CPSES Mr. T. J. Polich, NRR Mr. Arthur C. Tate Bureau of Radiation Control Texas Department of Public Health 1100 West 49th Street Austin, Texas 78704
,