Letter Sequence RAI |
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Initiation
- Request, Request, Request
- Acceptance...
- Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement
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MONTHYEARML12003A0632011-12-16016 December 2011
Tornado and High Energy Line Break (HELB) Mitigation License Amendment Requests (Lars) - Responses to Request for Additional Information, Part 2 of 6
Project stage: Response to RAI
ML12025A1242012-01-20020 January 2012
Tornado and High Energy Line Break Mitigation License Amendment Requests (Lars) - Supplemental Responses to Request for Additional Information (RAI) Nos. 61, 62, and 107
Project stage: Supplement
ML12047A1772012-02-16016 February 2012
Request for Additional Information Regarding the License Amendment Requests for Upgrading the Licensing Basis for High Energy Line Break Mitigation
Project stage: RAI
ML12080A1992012-03-0101 March 2012
Tornado and High Energy Line Break Mitigation License Amendment Requests - Supplemental Responses to Request for Additional Information Nos. 70, 76, and 106
Project stage: Supplement
ML12109A3452012-03-16016 March 2012
Supplement to License Amendment Request for Measurement Uncertainty Recapture Power Uprate, License Amendment Request No. 2011-02, Supplement 2
Project stage: Supplement
ML12144A4442012-06-11011 June 2012
Request for Additional Information Regarding the License Amendment Request for Licensing Basis for the Protected Service Water System (TAC ME7737, ME7738, ME7739, ME7746, ME7747, & ME7748)
Project stage: RAI
ML12188A0712012-07-11011 July 2012
G20120473/ EDATS: OEDO-2012-0404 - Briefing Book - Briefing Package for Meeting with Duke Energy on July 11, 2012
Project stage: Request
ML12312A0312012-11-0202 November 2012
Licensing Basis for the Protected Service Water System - Responses to Request for Additional Information - Supplement 3
Project stage: Supplement
ML12354A2722012-12-20020 December 2012
Request for Additional Information and Suspension of Review of License Amendment Request for Revised Licensing Basis for High-Energy Line Breaks
Project stage: RAI
ML13123A1592013-04-0505 April 2013
Response to Request for Additional Information to Licensing Basis for the Protected Service Water System - Supplement 4
Project stage: Supplement
ML13190A0162013-06-28028 June 2013
Licensing Basis for the Protected Service Water System - Responses to Request for Additional Information - Supplement 5
Project stage: Supplement
ML13228A2682013-08-0707 August 2013
Licensing Basis for Protected Service Water System - Updated Responses to Request for Additional Information Item Nos. 107, 109(a) and 109(b); License Amendment Request (LAR) 2008-07-Supplement 6
Project stage: Supplement
ML13262A3432013-09-19019 September 2013
10/3/2013 Meeting Notice with Duke Energy Carolinas, LLC, to Discuss the Proposed LAR Protected Service Water System Operation for the Oconee Nuclear Station, Units 1, 2, and 3 (TAC Nos. ME7737, ME7738, ME7739, ME7746, ME7747, and ME7748
Project stage: Meeting
ML13281A6972013-10-21021 October 2013
10/3/13 Summary of Meeting with Duke Energy Carolinas, LLC to Discuss the Protected Service Water System Operation - Oconee Nuclear Station Units 1, 2, and 3
Project stage: Meeting
ONS-2013-037, Licensing Basis for Protected Service Water System - Responses to Request for Additional Information Item Nos. 172 Through 189, License Amendment Request (LAR) 2008-07 - Supplement 72013-12-18018 December 2013
Licensing Basis for Protected Service Water System - Responses to Request for Additional Information Item Nos. 172 Through 189, License Amendment Request (LAR) 2008-07 - Supplement 7
Project stage: Supplement
ML14043A2772014-01-28028 January 2014
1/28/14 E-mail from R.Guzman to T.Brown Request for Additional Information - Protected Service Water Modification Calculation OSC-9211
Project stage: RAI
ONS-2014-021, Licensing Basis for the Protected Service Water System - Response to Request for Additional Information (RAI) No. 190; Revised Responses to RAI Nos. 134 and 165; License Amendment Request (LAR) 2008-07 - Supplement 82014-02-14014 February 2014
Licensing Basis for the Protected Service Water System - Response to Request for Additional Information (RAI) No. 190; Revised Responses to RAI Nos. 134 and 165; License Amendment Request (LAR) 2008-07 - Supplement 8
Project stage: Supplement
ONS-2014-048, Licensing Basis for the Protected Service Water (Psw) System - Response to Request for Additional Information (RAI) Nos. 191-194; License Amendment Request (LAR) 2008-07 - Supplement 92014-04-0303 April 2014
Licensing Basis for the Protected Service Water (Psw) System - Response to Request for Additional Information (RAI) Nos. 191-194; License Amendment Request (LAR) 2008-07 - Supplement 9
Project stage: Supplement
ML14099A5172014-04-0909 April 2014
Duke Energy Supplemental Response Protected Service Water LAR - GOTHIC Modeling Questions - 4/9/14 E-mail from R.Gambrell (Duke Energy) to R.Guzman (NRC)
Project stage: Supplement
ONS-2014-056, License Condition for the Unit 3 High Energy Line Break (Helb); License Amendment Request (LAR) 2008-07; Supplement 102014-04-11011 April 2014
License Condition for the Unit 3 High Energy Line Break (Helb); License Amendment Request (LAR) 2008-07; Supplement 10
Project stage: Supplement
ML14157A2402014-04-29029 April 2014
NRR E-mail Capture - Psw Commitments
Project stage: Request
05000269/LER-2014-001, Regarding Unanalyzed Condition Associated with the 13.8kV Emergency Power Cables Located in the Underground Trench2014-05-27027 May 2014
Regarding Unanalyzed Condition Associated with the 13.8kV Emergency Power Cables Located in the Underground Trench
Project stage: Request
ONS-2014-061, Licensing Basis for the Protected Service Water (Psw) System - Response to Requests for Additional Information Regarding Psw Cabling Aging Management Program and Fant Line Supply to Psw Degraded Voltage Protection; License Amendment Req2014-07-24024 July 2014
Licensing Basis for the Protected Service Water (Psw) System - Response to Requests for Additional Information Regarding Psw Cabling Aging Management Program and Fant Line Supply to Psw Degraded Voltage Protection; License Amendment Request
Project stage: Response to RAI
ML14206A7902014-08-13013 August 2014
Issuance of Amendments Regarding Implementation of the Protected Service Water System
Project stage: Approval
2013-04-05
[Table View] |
Text
From:
Guzman, Richard Sent:
Tuesday, January 28, 2014 2:24 PM To:
timothy.brown@duke-energy.com
Subject:
Oconee Protected Service Water - Follow-up Request for Additional Information related to OSC-9211 Categories:
Followup
- Tim, As follow-up to our teleconference on 1/21/14, below are the additional RAI questions related to Calculation OSC-9211 for the subject License Amendment Review.
To support timely completion of the technical staffs review, we request a response to the questions by Feb 14, 2014. We are available this week to go over any clarifications to ensure your group fully understands the questions. Let me know if/when youd like to have a call.
- Thanks, Rich Guzman Sr. Project Manager NRR/DORL/LPL1-1 US NRC 301-415-1030
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RAI-190 (EMCB-11)
Background:
The Oconee UFSAR, Section 3.2.1.1.1 designates portions of the Auxiliary Building that house engineered safeguards systems, control room, fuel storage facilities and radioactive materials as Class 1 structure. Section 3.2.1.1.2 of the UFSAR designates Oconee Turbine and Auxiliary Buildings (except as included in Class 1) as Class 2 structures.
Section 2.0 Design Input of Calculation OSC-9211 references Section 3.2.1.1 of the UFSAR and establishes that the exterior south wall of Unit 3 Auxiliary Building is classified as Class 1 structure.
Section 4.1 Load Combinations of Calculation OSC-9211, references Table 3-23 of the UFSAR for design basis load conditions used in Calculation OSC-9211 for structural evaluation of the exterior south wall of Unit 3 Auxiliary Building. Table 3-23 is referenced in Section 3.8.4.5 of the UFSAR for the design of those portions of the Auxiliary Building housing the facilities listed in Section 3.8.4.1 of the UFSAR.
Section 4.2 Acceptance Criteria of Calculation OSC-9211, references Section 20.2.3 of Specification OSS-0254.00-00-3007, Revision 4 Design Basis Specification of the Auxiliary Building for acceptance criteria for Class 1 reinforced concrete structures. Section 4.2 of Calculation OSC-9211 also references Section 3.8.5 of the UFSAR which is related to non-Class 1 structures and where a 33 percent increase, for wind and seismic load combinations, in allowable stress limits is allowed for the design of Class 2 structures.
Issue:
There is an apparent inconsistency in Section 4.2 of Calculation OSC-9211 where it is established that the exterior south wall of Unit 3 Auxiliary Building is classified as Class 1 and it is acknowledged that structural acceptance criteria for Class 1 structures will be used; but, in contrary, the UFSAR section related to non-Class 1 structures is referenced for use.
Request for Additional Information:
- a. Provide further clarification related to the seismic classification and the structural acceptance criteria applicable to the exterior south wall of Unit 3 Auxiliary Building evaluated in Calculation OSC-9211.
- b. Section 4.1 Load Combinations of Calculation OSC-9211, references Table 3-23 of the UFSAR for design basis load conditions used in Calculation OSC-9211 for structural evaluation of the exterior south wall of Unit 3 Auxiliary Building. Contrary to the UFSAR, Table 3-23, Calculation OSC-9211 excludes design basis earthquake from load combination LC1. Provide further clarification and reconcile the exclusion of design basis earthquake.
- c. Static soil pressure and hydrostatic loads are permanent loading conditions for the exterior south wall of Unit 3 Auxiliary Building evaluated in Calculation OSC-9211.
Provide further clarification and reconcile the exclusion of these loading conditions from Maximum Hypothetical Earthquake load combination LC3.
- d. Calculation OSC-9211 considers self-weight of the wall, self-weight of floor slab at elevation 796-6, and self-weight of concrete masonry wall at elevation 796-6. It is also stated in Calculation OSC-9211 that loads from floors above elevation 796-6 will be transferred through Auxiliary Building columns to the foundation. Confirm that equipment loading plus any other permanent loading, either attached directly to the south wall of Unit 3 Auxiliary Building or supported on the floor slab at Elevation 796-6, have been properly taken into account in Calculation OSC-9211.
- e. As assumed in Calculation OSC-9211, the existing reinforcing bars have been cut/removed to construct the new opening. The Auxiliary Building design basis code of record, ACI 318-63, requires that the calculated tension or compression in any reinforcing bar at any section must be developed on each side of that section by proper embedment length, end anchorage, or hook. Provide further information and demonstrate that there is sufficient embedment length of reinforcing bars to develop the flexural moment demand, in the horizontal and vertical directions, in the areas adjacent to the new opening.
- f.
Provide further information and demonstrate that the flexural and shear capacity of concrete spanning the width of the new opening is adequate to resist the maximum flexural moment and shear force demand.
- Thanks,
Rich Guzman Sr. Project Manager NRR/DORL US NRC 301-415-1030 Richard.Guzman@nrc.gov
