ML041410481
| ML041410481 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/11/2004 |
| From: | Rosalyn Jones Duke Power Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML041410481 (10) | |
Text
_ Duke R.
A.
JONES rSPowere Vice President A Duke Energy Company Duke Power 29672 / Oconee Nuclear Site 7800 Rochester Highway Seneca, SC 29672 May 11, 2004 864 885 3158 864 885 3564 fax U. S. Nuclear Regulatory Commission Washington, D. C. 20555-0001 Attention: Document Control Desk
Subject:
Oconee Nuclear Station Docket Numbers 50-269, 270, and 287 Response to Request for Additional Information License Amendment Request (LAR) for Technical Specification (TS) 3.4.9, "Pressurizer," TS Change (TSC) Number 2003-07 Please find attached the Duke Energy Corporation (DEC) response to the Staff's request for additional information. This information depicts the switchgear, load centers, and motor control centers that feed the pressurizer heater groups for each unit. The worst-case scenario would consist of losing the switchgear with the highest total kilowatts (kWs) leaving the maximum kWs available for heater use as the sum of the remaining switchgear.
It should be noted that these values are a "snapshot in time" and will change slightly as heaters bum-out or are recovered during future refueling outages. As of April 13, 2004, the total heater capacity for units 1, 2, and 3 is approximately 1386, 1050, and 1078 kWs.
Assuming the failure of the highest worth switchgear, the remaining existing heater capacity is 882, 602, and 672 kW for units 1, 2, and 3, respectively (See attached diagrams). These amounts satisfy the greater than 400 kW value proposed in the TS 3.4.9 LAR.
In addition, whenever there is inadequate power from the generating units, the 230 kV switching station, and the hydro units, power is available to the standby power buses either directly from the 100 kV Central Tie Substation or from Lee Steam Station via a 100 kV transmission line connected to 12/16/20 MVA Transformer CT5 located on the opposite side of the station from the 230 kV facilities. This single 100 kV circuit is connected to the 100 kV transmission system through the substation at Central located eight miles from Oconee. Central Substation is connected to Lee Steam Station twenty-two miles away through a similar 100 kV line.
www. duke -energy.com
U. S. Nuclear Regulatory Commission May 11, 2004 Page 2 If there are any questions regarding this information, please contact Stephen C. Newman at (864) 885-4388.
Very t yo, R.
. Jones, Vice President Oconee Nuclear Site Attachment
U. S. Nuclear Regulatory Commission May 11, 2004 Page 3 cc:
Mr. L. N. Olshan, Project Manager Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 0-14 H25 Washington, D. C. 20555 Mr. L. A. Reyes, Regional Administrator U. S. Nuclear Regulatory Commission - Region II Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, Georgia 30303 Mr. M. C. Shannon Senior Resident Inspector Oconee Nuclear Station cc %v/o attachment:
Mr. Henry Porter, Director Division of Radioactive Waste Management Bureau of Land and Waste Management Department of Health & Environmental Control 2600 Bull Street Columbia, SC 29201
Attachment Oconee Nuclear Station Pressurizer Heater Coordination Diagram
Unit 1 kW Available Switchgear ITD Switchgear I Load Center 1X5 Load Center Group A-126 kW Group K-42 kW Group B-126 kW Group I-168 Group H-168 kW Tal=504 kW Toa 2 WTotal
= 322 Total Available = 1386 kW Worst Case: 126 kW + 322 kW + 434 kW = 882 kW Available
Pressurizer Heater Capacity Available as of 4/13/04 Unit 1:
Bank #
Group #
Existing Capacity (kW) 1 A
126 1
K (Bias) 42 2
D 98 2
B 126 3
E 168 3
G 168 3
F (Controlling) 154 4
H 168 4
I 168 4
J (Controlling) 168 Total Capacity for Unit 1 1386
Unit 2 kW Available Switchgear 2TD Switchgear 2TE Load Center 2X5
.1111 Load Center 2X6
',II;I Group F-98 kW Group I-154kW Group D-O kW Group G-98 kW Group J-126 kW Ttal = 252 kW tat = 224 kW Total Available = 1050 kW Worst Case: 126 kW + 252 kW + 224 kW = 602 kW Available 4
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Pressurizer Heater Capacity Available as of 4/13/04 Unit 2:
Bank #
Group #
Existing Capacity 1
A 126 1
K (Bias) 42 2
D 0
2 B
126 3
E 112 3
G 98 3
F (Controlling) 98 4
H 168 4
I 154 4
J (Controlling) 126 Total Capacity for Unit 2 l
1050
Unit 3 kW Available I
Switchgear 3TC Switchgear 3TE Load Center 3X4 Load Center 3X6 Group A-126 kW Group K-42 kW Group E-84 kW Group H-154 kW Group D-14 kW Group G-84 kW Group J-140 kW Toal = 406 kW tal = 238 kW Total Available = 1078 kW Worst Case: 126 kW + 308 kW + 238 kW= 672 kW Available
Pressurizer Heater Capacity Available as of 4/13/04 Unit 3:
Bank #
Group #
Existing Capacity (kW) 1 A
126 1
K (Bias) 42 2
D 14 2
l B
126 3
E 84 3
G 84 3
F (Controlling) 140 4
H 154 4
I 168 4
J (Controlling) 140 Total Capacity for Unit 3 l
1078