NOC-AE-07002175, Control Room Inleakage Testing Results
| ML072820396 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 09/27/2007 |
| From: | Gerry Powell South Texas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| GL-03-001, NOC-AE-07002175, TAC MB9859 | |
| Download: ML072820396 (3) | |
Text
Nuclear Operating Company South Tcxas Procd Electnc GencratingStation P0. Box 289 Wadswvrth, Tkrs 77483 AAAA September 27, 2007 NOC-AE-07002175 10CFR50, Appendix A U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 South Texas Project Unit 2 Docket No. STN 50-499 Unit 2 Control Room Inleakage Testing Results (TAC NO. MB9859)
References:
- 1. Letter from David W. Rencurrel, STP Nuclear Operating Company, to the NRC Document Control Desk, dated June 6, 2006 (NOC-AE-06002018)
- 2. Letter from David W. Rencurrel, STP Nuclear Operating Company, to the NRC Document Control Desk, dated March 22, 2007 (NOC-AE-07002127)
In Reference 1, the STP Nuclear Operating Company (STPNOC) made the following commitment to the Nuclear Regulatory Commission (NRC).
In response to NRC Generic Letter 2003-01, control room envelope inleakage will be determined for South Texas Project Unit 2 using tracer gas methods and the results will be reported to the Nuclear Regulatory Commission.
Testing for control room envelope inleakage in Unit 2 using tracer gas methods was completed on February 14, 2007. The test results were as follows:
[
Train Combination Tested 1 Unfiltered Inleakage Trains A and B 11 +-6 scfm Trains A and C 0 +/- 9 scfm Trains B and C 64 +/- 8 scfm IThe Control Room Filtration and Cleanup Recirculation System consists of three 50 - per cent capacity trains.
2 scfm is standard cubic feet per minute.
STI: 32170436 r4,o ý9
NOC-AE-07002175 Page 2 The test results are greater than the unfiltered inleakage assumed in the current licensing basis accident analysis. Compensatory measures have been implemented to ensure that regulatory limits for meeting control room dose requirements are not exceeded. As a permanent resolution to this non-conforming condition, STPNOC submitted a license amendment request (Reference 2) to apply the Accident Source Term pursuant to 10 CFR 50.67 to allow for higher unfiltered inleakage.
This letter completes the STPNOC commitment discussed above. There are no new commitments in this letter.
If you have any questions or require additional information, please contact Ken Taplett at (361) 972-8416 or me at (361) 972-7566.
G. T. Powell Manager, Site Engineering KJT/
NOC-AE-07002175 Page 3 cc:
(paper copy) (electronic copy)
Regional Administrator, Region IV A. H. Gutterman, Esquire U. S. Nuclear Regulatory Commission Morgan, Lewis & Bockius LLP 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mohan C. Thadani U. S. Nuclear Regulatory Commission Mohan C. Thadani Thad Hill Senior Project Manager Eddy Daniels U.S. Nuclear Regulatory Commission Marty Ryan One White Flint North (MS 7 D1) Harry Holloway 11555 Rockville Pike Steve Winn Rockville, MD 20852 NRG South Texas LP Senior Resident Inspector Ed Alarcon U. S. Nuclear Regulatory Commission J. J. Nesrsta P. 0. Box 289, Mail Code: M1N116 R. K. Temple Wadsworth, TX 77483 Kevin Pollo City Public Service C. M. Canady Jon C. Wood City of Austin Cox Smith Matthews Electric Utility Department 721 Barton Springs Road C. Kirksey Austin, TX 78704 City of Austin Richard A. Ratliff Bureau of Radiation Control Texas Department of State Health Services 1100 West 49th Street Austin, TX 78756-3189
Text
Nuclear Operating Company South Tcxas Procd Electnc GencratingStation P0. Box 289 Wadswvrth, Tkrs 77483 AAAA September 27, 2007 NOC-AE-07002175 10CFR50, Appendix A U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 South Texas Project Unit 2 Docket No. STN 50-499 Unit 2 Control Room Inleakage Testing Results (TAC NO. MB9859)
References:
- 1. Letter from David W. Rencurrel, STP Nuclear Operating Company, to the NRC Document Control Desk, dated June 6, 2006 (NOC-AE-06002018)
- 2. Letter from David W. Rencurrel, STP Nuclear Operating Company, to the NRC Document Control Desk, dated March 22, 2007 (NOC-AE-07002127)
In Reference 1, the STP Nuclear Operating Company (STPNOC) made the following commitment to the Nuclear Regulatory Commission (NRC).
In response to NRC Generic Letter 2003-01, control room envelope inleakage will be determined for South Texas Project Unit 2 using tracer gas methods and the results will be reported to the Nuclear Regulatory Commission.
Testing for control room envelope inleakage in Unit 2 using tracer gas methods was completed on February 14, 2007. The test results were as follows:
[
Train Combination Tested 1 Unfiltered Inleakage Trains A and B 11 +-6 scfm Trains A and C 0 +/- 9 scfm Trains B and C 64 +/- 8 scfm IThe Control Room Filtration and Cleanup Recirculation System consists of three 50 - per cent capacity trains.
2 scfm is standard cubic feet per minute.
STI: 32170436 r4,o ý9
NOC-AE-07002175 Page 2 The test results are greater than the unfiltered inleakage assumed in the current licensing basis accident analysis. Compensatory measures have been implemented to ensure that regulatory limits for meeting control room dose requirements are not exceeded. As a permanent resolution to this non-conforming condition, STPNOC submitted a license amendment request (Reference 2) to apply the Accident Source Term pursuant to 10 CFR 50.67 to allow for higher unfiltered inleakage.
This letter completes the STPNOC commitment discussed above. There are no new commitments in this letter.
If you have any questions or require additional information, please contact Ken Taplett at (361) 972-8416 or me at (361) 972-7566.
G. T. Powell Manager, Site Engineering KJT/
NOC-AE-07002175 Page 3 cc:
(paper copy) (electronic copy)
Regional Administrator, Region IV A. H. Gutterman, Esquire U. S. Nuclear Regulatory Commission Morgan, Lewis & Bockius LLP 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mohan C. Thadani U. S. Nuclear Regulatory Commission Mohan C. Thadani Thad Hill Senior Project Manager Eddy Daniels U.S. Nuclear Regulatory Commission Marty Ryan One White Flint North (MS 7 D1) Harry Holloway 11555 Rockville Pike Steve Winn Rockville, MD 20852 NRG South Texas LP Senior Resident Inspector Ed Alarcon U. S. Nuclear Regulatory Commission J. J. Nesrsta P. 0. Box 289, Mail Code: M1N116 R. K. Temple Wadsworth, TX 77483 Kevin Pollo City Public Service C. M. Canady Jon C. Wood City of Austin Cox Smith Matthews Electric Utility Department 721 Barton Springs Road C. Kirksey Austin, TX 78704 City of Austin Richard A. Ratliff Bureau of Radiation Control Texas Department of State Health Services 1100 West 49th Street Austin, TX 78756-3189