ML081560395
| ML081560395 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 05/28/2008 |
| From: | Brandi Hamilton Duke Energy Carolinas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML081560395 (8) | |
Text
Vice President
- Enuker BRUCE McGuireH HAMILTON Nuclear Station Duke Energy Corporation MG01 VP / 12700 Hagers Ferry Road Huntersville, NC 28078 704-875-5333 704-875-4809 fax bhhamilton@duke-energy.corn May 28, 2008 U. S. Nuclear Regulatory Commission Washington, D.C. 20555 ATTENTION: Document Control Desk
Subject:
Duke Energy Carolinas, LLC (Duke)
McGuire Nuclear Station, Units 1 and 2 Docket Nos. 50-369 and 50-370 License Amendment Request for Full Scope Implementation of the Alternative Source Term Revisions to Control Room Atmospheric Dispersion Factors Reference 1: Duke letter to NRC dated March 20, 2008 Attachment 1 to this letter supplements McGuire Nuclear Station's Alternative Source Term License Amendment Request (LAR) dated March 20, 2008 (Reference 1). Corrected meteorological data-files and revised control room atmospheric dispersion factors are provided in the attachment.
The meteorological data files are a component of the input to the ARCON96 computer code used to calculate control room atmospheric dispersion factors.
During an April 24, 2008 conference call between NRC Staff and Duke personnel, questions about the meteorological data files were discussed, and the need to reformat the 2004 meteorological data file for proper utilization by the ARCON96 code was identified. The meteorological data files have been corrected and updated in response to this discussion. The updated files were then used to re-compute the control room atmospheric dispersion factors. The revised meteorological data files and the replacement dispersion factor tables for the LAR are provided in Attachment 1.
www. duke-energy, corn
U.S. Nuclear Regulatory Commission Page 2 May 28, 2008 In comparison to the values originally submitted, the re-computed control room atmospheric dispersion factors were' minimally impacted. Thus, incorporation of the revised dispersion factors into the radiological consequence models did not result in a material change to the control room doses reported in Sections 4.9 and 4.10 of Reference 1. contains the corrected control room atmospheric dispersion factors in revised Tables 15, 16, 17, and B-3. Appendix D is also included to transmit the revised meteorological data files (CID format).
The conclusions reached in the original determination that this License Amendment contains No Significant Hazards Considerations and the basis for the categorical exclusion from performing an Environmental/Impact Statement have not changed as a result of these revisions.
Please contact Lee A. Hentz at 704-875-4187 if additional questions arise regarding this License Amendment Request.
Sincerely, Bruce H. Hamilton Attachment
U.S. Nuclear Regulatory Commission Page 3 May 28, 2008 cc: w/attachment L. A. Reyes Regional Administrator, Region II U.S. Nuclear Regulatory Commission Sam Nunn Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, GA 30303 J. F. Stang, Jr. (addressee only)
Senior Project Manager U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Mail Stop 0-8 G9A Washington, D.C. 20555 J. B. Brady NRC Senior Resident Inspector McGuire Nuclear Station B. 0. Hall Section Chief Division of Radiation Section 1645 Mail Service Center Raleigh, NC 27699
U.S. Nuclear Regulatory Commission Page 4 May 28, 2008 OATH AND AFFIRMATION Bruce H. Hamilton affirms that he is the person who subscribed his name to the foregoing statement, and that all the matters and facts set forth herein are true and correct to the best of his knowledge.
Is4mee2Z Bruce H. Hamilton, Site Vice President Subscribed and sworn to me:
Date Notary Public My commission expires: JO!
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Date
Attachment 1 Table 15 Maximum Control Room Atmospheric Dispersion Factors (sec/rn 3 )
Equipment Refueling Time Unit Vent. Hatch Water Hatch Storage Tank M1UVi M1EQ1PTM (arc) M2FWST2 0 -2 hours 1.67E-03 4.06E-03 1.84E-03 0 - 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> 1.51 E-03 3.76E-03 1.75E-03 0 - 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 1.42E-03 3.51 E-03 1.63E-03 2 - 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 1.33E-03 3.33E-03 1.57E-03 4 - 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 1.33E-03 3.26E-03 1.51 E-03 8 - 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 6.77E-04 1.60E-03 7.68E-04 1 - 4 days 5.25E-04 1.23E-03 5.68E-04 4 - 30 days 4.18E-04 9.73E-04 4.48E-04 Not adjusted for dual intakes or VC System flow split.
See footnote in Table B-3 of Appendix B for explanation of source receptor nomenclature.
Table 16 McGuire LOCA Control Room Atmospheric Dispersion Factors (Unadjusted for Control Room Area Ventilation System Intake Flow Split, sec/m 3)
Eqipet Refueling Time Unit Vent Equipment Water Storage Tank 0 - 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 1.67E-03 4.06E-03 1.84E-03 2 - 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 1.33E-03 3.33E-03 1.57E-03 8 - 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 6.77E-04 1.60E-03 7.68E-04 1 - 4 days 5.25E-04 1.23E-03 5.68E-04 4 - 30 days 4.18E-04 9.73E-04 4.48E-04
Attachment 1 Table 17 Control Room Atmospheric Dispersion Model for VC Alignments (sec/M 3 , 65/35 flow split)
Eq nt Refueling Time Unit Vent1 Eqipen Water Storage Tank 0 - 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 3 1.09E-03 2.64E-03 1.20E-03 2- 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 8.65E-04 2.16E-03 1.02E-03 8 - 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 4.40E-04 1.04E-03 4.99E-04 1 - 4 days 3.41 E-04 8.OOE-04 3.69E-04 4 - 30 days 2.72E-04 6.32E-04 2.91 E-04 1 Upper and lower containment bypass leakage flow path. Release point for other discharges.
2 Upper containment bypass leakage flow path.
3 Values to be used during 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> period of maximum activity release
Attachment 1 Table B-3 McGuire Maximum (X/Q)s per Source (McGuire 2001-2005 Meteorology) 0-2 Hr 0-4 Hr 0-8 Hr 2-8 Hr 4-8 Hr 8-24 Hr 1-4 day 4-30 day EQM1EQ1PTM(arc) 4.06E-03 3.76E-03 3.51 E-03 3.33E-03 3.26E-03 1.60E-03 1.23E-03 9.73E-04 FUEL 7.97E-04 7.20E-04 6.62E-04 6.18E-04 6.04E-04 2.83E-04 2.32E-04 1.90E-04 NDOG 1.16E-03 9.45E-04 8.25E-04 7.38E-04 7.13E-04 3.00E-04 2.40E-04 1.96E-04 M2NDOG2 (arc) M2NDOG2 (arc) M2NDOG2 (arc) M1NDOG1 (arc) MINDOG1 (arc) M2NDOG2 (arc) M2NDOG2 (arc) M2NDOG2 (arc)
VNDOG 1.54E-03 1.31 E-03 1.16E-03 1.05E-03 1.01 E-03 4.17E-04 3.25E-04 2.65E-04 M2VNDOG2 (arc) M1VNDOG1 (arc) M1VNDOG1 (arc) MlVNDOG1 (arc) M1VNDOG1 (arc) M1VNDOG1 (arc) M2VNDOG2 (arc) M2VNDOG2 (arc)
ODOG 4.99E-03 4.37E-03 4.03E-03 3.71 E-03 3.69E-03 1.79E-03 1.49E-03 1.20E-03 V2ODOG VODOG 1.73E-02 1.52E-02 1.40E-02 1.30E-02 1.28E-02 6.23E-03 5.12E-03 4.05E-03 M2VODOG2 RX- Murphy-Campe 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 M1RX1; M2RX2 FWST M2FWST2 1.84E-03 1.75E-03 1.63E-03 1.57E-03 1.51 E-03 7.68E-04 5.68E-04 4.48E-04 UV MiUVi 1.67E-03 1.51 E-03 1.42E-03 1.33E-03 1.33E-03 6.77E-04 5.25E-04 4.18E-04 VP M2VP2(arc 1.57E-03 1.43E-03 1.30E-03 1.21E-03 1.17E-03 5.26E-04 4.14E-04 3.45E-04 AGIN (arc) 2.92E-03 2.80E-03 2.60E-03 2.49E-03 2.40E-03 1.17E-03 8.72E-04 6.72E-04 A 1AINOUrc AGOUTM2AGOUT2 1.75E-02 1.63E-02 1.50E-02 1.41 E-02 1.37E-02 6.45E-03 4.85E-03 3.64E-03 PORVin 2.60E-03 2.38E-03 2.20E-03 2.07E-03 2.02E-03 9.77E-04 7.45E-04 5.70E-04 M1PORVnl M2PORVo2 1.07E-02 9.89E-03 8.99E-03 8.42E-03 8.09E-03 3.75E-03 2.98E-03 2.43E-03 MVSSVin 5.77E-04 M1MSSVni 2.90E-03 2.64E-03 2.42E-03 2.26E-03 2.20E-03 1.02E-03 7.69E-04 MVSSVOut Murphy-Campe 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 1.26E-03 M1 MSSVol ;M2MSSVo2 AFW 3.30E-03 2.74E-03 2.47E-03 2.19E-03 2.20E-03 1.07-03 7.90E-04 6.23E-04 M1AFWnls M1AFWnls M1AFWnls M1AFWnls M1AFWnls MlAFWla (arc) M1AFWla (arc) M1AFW1a (arc)
Receptor/source nomenclature lists the receptor first, followed by source. For example, "M1 UVl" represents a release from the Unit 1 unit vent
("UVl") to the McGuire unit one control room area ventilation system inlet location ("MV").
Attachment 1 Appendix D The attached compact disc (CD) contains McGuire meteorological data for each year from 2001 through 2005. Five data files are included. Each file corresponds to the year indicated in the file name. These files (*.met) are text files. They can be opened into any standard text, spreadsheet, or word processing software.