NL-09-1838, CFR 50.46 ECCS Evaluation Model Annual Reports for 2008

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CFR 50.46 ECCS Evaluation Model Annual Reports for 2008
ML093510914
Person / Time
Site: Hatch, Vogtle, Farley  Southern Nuclear icon.png
Issue date: 12/17/2009
From: Ajluni M
Southern Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-09-1838
Download: ML093510914 (18)
v • d • e


Text

Southern Nlielea' Opl;)rnting Cumpany, In:,

December 17, 2009 SOUTHERN'\

COMPANY Docket Nos: 50-321 50-348 50-424 50-366 50-364 50-425 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Joseph M. Farley Nuclear Plant Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Reports for 2008 Ladies and Gentlemen:

Southern Nuclear Operating Company (SNC) is the licensed operator for the Edwin I. Hatch Nuclear Plant (Hatch), the Joseph M. Farley Nuclear Plant (Farley), and the Vogtle Electric Generating Plant (Vogtle). The requirements of 10 CFR 50.46(a)(3){ii) include an annual report by licensees of changes to or errors in acceptable emergency core cooling system (ECCS) models that affect the temperature calculation and the estimated effect of changes or errors on the limiting ECCS analysis. Accordingly, the reports required by 10 CFR 50.46(a){3)(ii) for Hatch, Farley, and Vogtle are provided in Enclosures 1, 2, and 3, respectively. The resulting peak cladding temperature (PCT) for Hatch, Farley, and Vogtle continues to meet the criterion of 10 CFR 50.46{b){1) (Le., :s; 2200°F).

This letter contains no NRC commitments. If you have any questions, please advise.

Sincerely, f!l.J ~ Uif-'

M. J. Ajluni Nuclear Licensing Manager MJAfCL T flac

U. S. Nuclear Regulatory Commission NL-09-1838 Page 2

Enclosures:

1. Edwin I. Hatch Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008
2. Joseph M. Farley Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008
3. Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 cc: Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. J. R. Johnson, Vice President - Farley Mr. D. R. Madison, Vice President - Hatch Mr. T. E. Tynan, Vice President - Vogtle Ms. P. M. Marino, Vice President - Engineering RType: CFA04.054; CHA02.004; CVC7000.

U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Mr. R. E. Martin, NRR Project Manager - Farley Ms. D. N. Wright, NRR Project Manager - Hatch Ms. D. N. Wright, NRR Project Manager - Vogtle Mr. E. L. Crowe, Senior Resident Inspector - Farley Mr. J. A. Hickey, Senior Resident Inspector - Hatch Mr. M. Cain, Senior Resident Inspector - Vogtle

Edwin I. Hatch Nuclear Plant Joseph M. Farley Nuclear Plant Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Reports for 2008 Enclosure 1 Edwin I. Hatch Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008

Enclosure 1 Edwin I. Hatch Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Edwin I. Hatch Nuclear Plant Unit 1 SAFERIGESTR-LOCA Analysis Model I Table 1-la Summary of Changes/Errors (2008)

Estimated Description Effect

(~ PCT)

None affecting PCT N/A Table 1-lb Cumulative Impact of Changes/Errors  !

GE14 Description

~IPCTI (OF)

  • Changes/Errors Previously Reported (Reference 1) 5
  • Current Year - 2008 (Reference 2) 0 5

Cumulative Total Page 1 of 3

Enclosure 1 Edwin I. Hatch Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Edwin I. Hatch Nuclear Plant Unit 2 SAFERIGESTR-LOCA Analysis Model Table 1-2a - Summary of Changes/Errors (2008)

Estimated Description Effect (Ll Pcn None affecting PCT N/A i

Table 1-2b - Cumulative Impact of Changes/Errors GE14 Description LlIPCTI (OF)

  • Changes/Errors Previously Reported (Reference 1) 5
  • Current Year 2008 (Reference 3) 0 5

Cumulative Total Page 2 of 3

Enclosure 1 Edwin I. Hatch Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008

References:

1. Letter from Mark J. Ajluni to USNRG (NL-08-1735), "Edwin I. Hatch Nuclear Plant, Joseph M. Farley Nuclear Plant, Vogtle Electric Generating Plant 10 GFR 50.46 EGGS Evaluation Model Annual Reports for 2007," dated December 19, 2008
2. Global Nuclear Fuel Supplemental Reload Licensing Report for Edwin I.

Hatch Nuclear Power Plant Unit 1 (Report Number 0000-0067-2863-SRLR),

Revision 0, dated December 2007

3. Global Nuclear Fuel Supplemental Reload Licensing Report for Edwin I.

Hatch Nuclear Power Plant Unit 2 (Report Number 0000-0083-5389-SRLR),

Revision 0, dated December 2008 Page 3 of 3

Edwin I. Hatch Nuclear Plant Joseph M. Farley Nuclear Plant Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Reports for 2008 Enclosure 2 Joseph M. Farley Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008

Enclosure 2 Joseph M. Farley Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Joseph M. Farley Nuclear Plant - Unit 1 ASTRUM Best Estimate Large Break LOCA Evaluation Table 2-1a - Summary of Changes/Errors (2008)

Estimated Description Effect

(~ PCT)

Reactor Coolant PumRs InRuts Error Several errors were discovered in the pump two-phase degraded homologous curve. In addition, minor errors were also found in the pump inputs resulting in a slight loop to loop asymmetry. The 18°F corrected pump inputs have been evaluated. The result from the plant specific WCOBRAfTRAC runs yielded an estimated PCT increase of 18°F for Farley Unit 1.

Table 2-1 b - Cumulative Impact of Changes/Errors

~IPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 0
  • Current Year - 2008 (Reference 2) 18 Cumulative Total 18 Page 1 of 5

Enclosure 2 Joseph M. Farley Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Joseph M. Farley Nuclear Plant - Unit 1 NOTRUMP Appendix K Small Break LOCA Evaluation Table 2-1c - Summary of Changes/Errors (2008)

Estimated Description Effect (L'l PCT)

None affecting PCT N/A Table 2-1d - Cumulative Impact of Changes/Errors L'lIPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 42
  • Current Year - 2008 (Reference 2) 0 Cumulative Total 42 Page 2 of 5

Enclosure 2 Joseph M. Farley Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Joseph M. Farley Nuclear Plant - Unit 2 ASTRUM Best Estimate Large Break LOCA Evaluation Table 2-2a - Summary of Changes/Errors (2008)

Estimated Description Effect (b. PCT)

Reactor Coolant Pumes IDeuts Error Several errors were discovered in the pump two-phase deg raded homologous curve. In addition, minor errors were also found in the pump inputs resulting in a slight loop to loop asymmetry. The 18°F corrected pump inputs have been evaluated. The result from the plant specific WCOBRNTRAC runs yielded an estimated PCT increase of 18°F for Farley Unit 2.

Table 2-2b - Cumulative Impact of Changes/Errors b.IPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 0
  • Current Year - 2008 (Reference 2) 18 Cumulative Total 18 Page 3 of 5

Enclosure 2 Joseph M. Farley Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Joseph M. Farley Nuclear Plant - Unit 2 NOTRUMP Appendix K Small Break LOCA Evaluation Table 2-2c - Summary of Changes/Errors (2008)

Estimated Description Effect (L1 PCT)

None affecting PCT N/A I

Table 2-2d - Cumulative Impact of Changes/Errors L1IPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 0
  • Current Year - 2008 (Reference 2) 0 Cumulative Total 0 Page 4 of 5

Enclosure 2 Joseph M. Farley Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 References

1. Letter from Mark J. Ajluni to USI\IRG (I\IL-08-1735), "Edwin I. Hatch Nuclear Plant, Joseph M. Farley Nuclear Plant, Vogtle Electric Generating Plant 10 GFR 50.46 EGGS Evaluation Model Annual Reports for 2007,"

dated December 19, 2008

2. Westinghouse Letter LTR-LlS-09-75, "J. M. Farley Units 1 and 2 10 GFR 50.46 Annual Notification and Reporting for 2008," dated January 29, 2009 Page 5 of 5

Edwin I. Hatch Nuclear Plant Joseph M. Farley Nuclear Plant Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Reports for 2008 Enclosure 3 Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008

Enclosure 3 Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Vogtle Electric Generating Plant - Unit 1 BASH Large Break LOCA Evaluation Table 3-1 a - Summary of Changes/Errors (2008)

Estimated Description Effect

(<'1 PCT)

None affecting PCT N/A Table 3-1 b - Cumulative Impact of Changes/Errors

<'1IPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 40
  • Current Year - 2008 (Reference 2) 0 Cumulative Total 40 Page 1 of 5

Enclosure 3 Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Vogtle Electric Generating Plant - Unit 1 Appendix K Small Break LOCA Evaluation I

Table 3-1c - Summary of Changes/Errors (2008)

Estimated Description Effect (ll PCT)

None affecting PCT N/A Table 3-1d - Cumulative Impact of Changes/Errors lllPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 0
  • Current Year - 2008 (Reference 2) 0 Cumulative Total 0 Page 2 of 5

Enclosure 3 Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Vogtle Electric Generating Plant - Unit 2 BASH Large Break LOCA Evaluation Table 3-2a - Summary of Changes/Errors (2008)

Estimated Description Effect (t. PCT)

None affecting PCT N/A Table 3-2b - Cumulative Impact of Changes/Errors t.IPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 40
  • Current Year - 2008 (Reference 2) 0 Cumulative Total 40 Page 3 of 5

Enclosure 3 Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 Vogtle Electric Generating Plant - Unit 2 Appendix K Small Break LOCA Evaluation Table 3-2c - Summary of Changes/Errors (2008)

Estimated Description Effect (i1 PCT)

None affecting PCT N/A Table 3-2d - Cumulative Impact of Changes/Errors i1IPCTI Description (OF)

  • Changes/Errors Previously Reported (Reference 1) 0
  • Current Year 2008 (Reference 2) 0 Cumulative Total 0 Page 4 of 5

Enclosure 3 Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2008 References

1. Letter from Mark J. Ajluni to USNRC (NL-08-1735), "Edwin I. Hatch Nuclear Plant, Joseph M. Farley Nuclear Plant, Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Reports for 2007," dated December 19, 2008
2. Westinghouse Letter LTR-LlS-09-91, "Vogtle Units 1 and 2 10 CFR 50.46 Annual Notification and Reporting for 2008," dated January 29, 2009 Page 5 of 5
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