ND-19-1388, Preliminary Amendment Request (Par): Tornado Missile Protection for Main Steam Vent Stacks and Wall 11 (PAR-19-014)
| ML19317F386 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 11/13/2019 |
| From: | Whitley B Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| ND-19-1388, PAR-19-014 | |
| Download: ML19317F386 (7) | |
Text
B. H. Whitley Southern Nuclear Director Operating Company, Inc.
Regulatory Affairs 3535 Colonnade Parkway Birmingham, AL 35243 Tel 205.992.7079 November 13, 2019 Docket No.:
52-025 ND-19-1388 10 CFR 50.90 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Southern Nuclear Operating Company Vogtle Electric Generating Plant Unit 3 Preliminary Amendment Request (PAR):
Tornado Missile Protection for Main Steam Vent Stacks and Wall 11 (PAR-19-014)
Ladies and Gentlemen:
The U.S. Nuclear Regulatory Commission (NRC) issued the Vogtle Electric Generating Plant (VEGP) Units 3 and 4 combined licenses (COLs) (License Numbers NPF-91 and NPF-92, respectively) to Southern Nuclear Operating Company (SNC) on February 10, 2012.
By SNC letter ND-19-0855, dated August 16, 2019, SNC submitted License Amendment Request (LAR), LAR-19-014 (ADAMS Accession Number ML19228A241), to revise information in the VEGP Units 3 and 4 licensing basis documents. The LAR proposes to depart from Tier 2 information in the Updated Final Safety Analysis Report (UFSAR) (which includes the plant-specific Design Control Document (DCD) information) to change the evaluation of the auxiliary building main steam safety valve (MSSV) vent stack openings and the auxiliary building Wall 11 openings for protection from tornado-generated missiles.
SNC is submitting this Preliminary Amendment Request (PAR), PAR-19-014, to minimize construction delays for VEGP Unit 3 during the NRCs evaluation of the related LAR. The determination of whether the NRC has any objection to SNC proceeding with construction based on the proposed licensing basis changes identified in the LAR is requested on or before January 11, 2020. Delayed determination regarding this PAR could result in delay of erection of a steel missile barrier in the turbine building at elevation 100-0 in front of the Wall 11 door to Room 12306.
A description of the proposed change and the reason for the change are contained in the Enclosure to this letter. This PAR has been developed in accordance with guidance provided in the most recent revision to the Interim Staff Guidance on Changes during Construction Under 10 CFR Part 52, COL-ISG-025 [ADAMS Accession Number ML15058A377] and corresponds accurately and technically with the above-mentioned LAR-19-014. The technical scope of this PAR is consistent with the subject LAR. Section 7 of the Enclosure further identifies and details the scope of the no objection finding sought in this PAR.
This letter does not contain any NRC commitments. This letter has been reviewed and confirmed to not contain security-related information.
U.S. Nuclear Regulatory Commission ND-19-1388 Page 2 of 4 Should you have any questions, please contact Mr. Ryan Henderson at (205) 992-6426.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 131h of November 2019.
Respectfully submitted, Brian H. Whitley Director, Regulatory Affairs Southern Nuclear Operating Company
Enclosure:
Vogtle Electric Generating Plant (VEGP) Unit 3-Preliminary Amendment Request:
Tornado Missile Protection for Main Steam Vent Stacks and Wall 11 (PAR-19-014)
U.S. Nuclear Regulatory Commission ND-19-1388 Page 3 of 4 cc:
Southern Nuclear Operating Company / Georgia Power Company Mr. S. E. Kuczynski (w/o enclosure)
Mr. P. P. Sena III (w/o enclosure)
Mr. M. D. Meier (w/o enclosure)
Mr. D. H. Jones (w/o enclosure)
Mr. G. Chick Mr. M. Page Mr. D. L. McKinney (w/o enclosure)
Mr. T. W. Yelverton (w/o enclosure)
Mr. B. H. Whitley Ms. C. A. Gayheart Mr. C. R. Pierce Ms. M. Ronnlund Mr. D. L. Fulton Mr. M. J. Yox Mr. C. T. Defnall Mr. J. Tupik Ms. S. Agee Mr. M. Humphrey Ms. A. C. Chamberlain Mr. S. Leighty Mr. N. Kellenberger Mr. E. Riffle Ms. K. Roberts Mr. J. Haswell Mr. D. T. Blythe Document Services RTYPE: VND.LI.L00 File AR.01.02.06 Nuclear Regulatory Commission Mr. W. Jones (w/o enclosure)
Mr. M. King (w/o enclosure)
Mr. C. Patel Mr. C. Santos Mr. B. Kemker Mr. G. Khouri Ms. S. Temple Mr. F. Brown Mr. C. J. Even Mr. A. Lerch Mr. S. Walker Mr. N.D. Karlovich Ms. N. C. Coovert Mr. C. Welch Mr. J. Gaslevic Mr. V. Hall Ms. K. P. Carrington
U.S. Nuclear Regulatory Commission ND-19-1388 Page 4 of 4 Mr. M. Webb Mr. P.J. Heher State of Georgia Mr. R. Dunn Oglethorpe Power Corporation Mr. M. W. Price Ms. A. Whaley Municipal Electric Authority of Georgia Mr. J. E. Fuller Mr. S. M. Jackson Dalton Utilities Mr. T. Bundros Westinghouse Electric Company, LLC Mr. L. Oriani (w/o enclosure)
Mr. T. Rubenstein (w/o enclosure)
Mr. M. Corletti Mr. D. Hawkins Mr. J. Coward Other Mr. S. W. Kline, Bechtel Power Corporation Ms. L. A. Matis, Tetra Tech NUS, Inc.
Dr. W. R. Jacobs, Jr., Ph.D., GDS Associates, Inc.
Mr. S. Roetger, Georgia Public Service Commission Ms. S. W. Kernizan, Georgia Public Service Commission Mr. K. C. Greene, Troutman Sanders Mr. S. Blanton, Balch Bingham NDDocumentinBox@duke-energy.com, Duke Energy Mr. S. Franzone, Florida Power & Light
Southern Nuclear Operating Company ND-19-1388 Enclosure Vogtle Electric Generating Plant (VEGP) Unit 3 Preliminary Amendment Request:
Tornado Missile Protection for Main Steam Vent Stacks and Wall 11 (PAR-19-014)
(This Enclosure consists of 3 pages, including this cover page.)
ND-19-1388 Enclosure Tornado Missile Protection for Main Steam Vent Stacks and Wall 11 (PAR-19-014)
Page 2 of 3 Pursuant to 10 CFR 52.98(c) and in accordance with 10 CFR 50.90, Southern Nuclear Operating Company (SNC) submitted license amendment request (LAR)-19-014 to change the Vogtle Electric Generating Plant (VEGP) Unit 3 and 4 licensing basis documents associated with Combined License Nos. NPF-91 and NPF-92.
Accordingly, SNC requests the determination of whether the NRC has any objection to SNC proceeding with construction of VEGP Unit 3 Wall 11 tornado missile protection, which is subject to the changes proposed in LAR-19-014. Delayed determination regarding this Preliminary Amendment Request (PAR) will result in delay in the construction completion of VEGP Unit 3, as identified in the PAR provided below, to be provided by the date shown below.
PAR Request Number:
SNC PAR-19-014 Station Name:
VEGP Unit Number(s):
3 4
PAR Request Date:
November 13, 2019
- 1. NRC PAR Notification Requested Date (see Block 7 for basis): January 11, 2020
- 2. License Amendment Request References (as applicable):
LAR submittal date and SNC Correspondence Number: LAR-19-014 - August 16, 2019 / ND-19-0855 Expected LAR submittal date:
- 3. Brief Description of Proposed Change:
The proposed change would revise licensing basis information in the Updated Final Safety Analysis Report (UFSAR) Tier 2 information (plant-specific DCD), to change the evaluation of the auxiliary building main steam safety valve (MSSV) vent stack openings and the auxiliary building Wall 11 openings for protection from tornado-generated missiles. The changes include the evaluation of horizontal missiles targeting the MSSV vent stacks, the evaluation of vertical missiles targeting the MSSV vent stack openings, and the evaluation of missiles targeting the auxiliary building Wall 11 openings. A steel missile barrier is proposed to be added in the turbine building first bay, in support of these evaluations, to eliminate the line of sight into Room 12306 and prevent sphere and artillery missiles from penetration. The missile barrier is designed in accordance with AISC N690-1994 and meets UFSAR Subsection 3.5.3 requirements. The evaluations demonstrate that the tornado missiles will not prevent safe shutdown and will not result in an offsite release exceeding the limits in 10 CFR 50.34.
The proposed change impacts UFSAR Tier 2 information in Subsection 3.5.2 and 10.3.2.2.2, and Table 3.5-1.
- 4. Reason for License Amendment Request:
No change is made to Tier 1, Tier 2*, or COL information; however this change involves a revision to plant-specific Tier 2 information that meets the criteria for a license amendment under 10 CFR Part 52, Appendix D, Section VIII.B.5.b(8) in that it was determined that the proposed change would result in a departure from a method of
ND-19-1388 Enclosure Tornado Missile Protection for Main Steam Vent Stacks and Wall 11 (PAR-19-014)
Page 3 of 3 evaluation described in the plant-specific DCD used in establishing the design bases or in the safety analyses, and thus requires NRC approval for the Tier 2 departures.
Additional details are provided in the referenced LAR (LAR-19-014).
- 5. Is Exemption Request Required?
Yes No If Yes, Briefly Describe the Reason for the Exemption.
No exemption required for the PAR.
- 6. Identify Applicable Precedents:
No precedent identified.
- 7. Impact of Change on Installation and Testing Schedules:
A delayed determination regarding this PAR will result in delay of a steel missile barrier installation in the VEGP Unit 3 turbine building first bay at elevation 100-0 in front of the Wall 11 door to Room 12306, as discussed below.
As such, this PAR requests a no objection finding related to the changes described in LAR-19-014 by the date identified in Block 1 above (or sooner if reasonably achievable) to allow for appropriate notifications and release of further activities dependent on construction of the VEGP Unit 3 turbine building first bay, as noted below.
Specifically, SNC is requesting a no objection finding to allow:
Steel missile barrier installation in the VEGP Unit 3 turbine building first bay at elevation 100-0 in front of the Wall 11 door to Room 12306 Construction holds have been issued for these activities.
A no objection finding for the above activities would allow for VEGP Unit 3 construction activities to proceed.
- 8. Impact of Change on ITAAC:
Not applicable.
- 9. Additional Information:
None