ML17309A071
| ML17309A071 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 06/06/2017 |
| From: | - No Known Affiliation |
| To: | Division of Operating Reactor Licensing |
| References | |
| 17-953-02-LA-BD01 | |
| Download: ML17309A071 (12) | |
Text
1 SeabrookLANPEm Resource From:
Carley, Edward <Edward.Carley@nexteraenergy.com>
Sent:
Tuesday, June 06, 2017 8:38 AM To:
Poole, Justin
Subject:
[External_Sender] FW: overview slides Attachments:
June2017_overviewSlides_SGH_007.ppt
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6/6/2017 8:38:02 AM Received Date:
6/6/2017 8:38:29 AM From:
Carley, Edward Created By:
Edward.Carley@nexteraenergy.com Recipients:
"Poole, Justin" <Justin.Poole@nrc.gov>
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License Amendment Request 16-03 ASR Expansion and Structures Monitoring June 2017
2 Reconciliation of CLB to account for ASR loads The changes in LAR 16-03 include:
Establishes limits for the allowable level of ASR concrete expansion based on the MPR/FSEL large scale test programs to ensure no adverse effects on concrete capacity Revises UFSAR to include ASR as a design basis load that must be evaluated with other loads on seismic Category I structures Defines a process to analyze loads that arise from structural deformation caused by ASR, including limits on the allowable extent of building deformation to maintain margin to design code acceptance limits in ACI 318-71 and the ASME Code Establishes a program to monitor structural deformation and ASR concrete expansion to ensure limits for ASR expansion and structural deformation are not exceeded
3 Building Deformation Analyses Purpose
- Confirm compliance with original design codes considering Impact of ASR on structural capacity and demand Building deformation from ASR expansion Scope
- All seismic Cat I and selected non-Cat I structures
4 Building Deformation Analysis Approach ASR load factors are developed to include ASR loads in design basis load combinations
- ACI 318-71 and 1975 Edition of ASME B&PV Section III Division 2 does not include load factors for ASR
- Developed load factors consistent with ACI 318-71 and ASME 1975 Edition load factor development
- Load factors for ASR are included in Tables 3.8-1 and 3.8-16 of the UFSAR Structures evaluated to demonstrate that additional ASR expansion is permissible
- Margin is included in the acceptance criteria for each stage to ensure that additional deformation does not challenge design limits
- A higher level of deformation is analyzed relative to current measurements to set the threshold for monitoring
5 Building Deformation Analyses Passes Evaluation
?
No Yes Threshold Monitoring Every 36 Months Original design calculations Supporting Stage 1 Calculation Stage One:
Screening Evaluation Start Passes Evaluation
?
No Yes Threshold Monitoring Every 18 Months Original design calculations Supporting Stage 2 Calculation Stage Two:
Analytical Evaluation Start Threshold Monitoring Every 6 Months Stage 3 Design Evaluation Calculation Stage Three:
Detailed Evaluation Start Note: For more complex structures, the evaluation may start at Stage Two or Stage Three.
6 Building Deformation Analyses - Status Summary Methodology Documents Criteria Document for deformation analyses (160268-CD-01):
Rev. 0 issued on 20 Oct. 2016 Rev. 1 issued on 12 Jan. 2017 (NextEra FP101083)
Incorporates revisions suggested during 26 Oct. 2016 audit meetings with NRC, including:
- Adds checklist & guidelines for parameters monitored
- Adds checklist for documents to review
- Adds guidelines for selection of starting stage Emphasizes use of expansion measurements rather than CI for threshold monitoring (subsequent to establishing baseline expansion) for increased accuracy Clarifies procedure to compute ASR strain when some of the cracks at a Cracking Index location are caused by mechanisms other than ASR Load factors for ASR expansion Rev. 0 of summary report (160268-R-01, FP101039) issued on 27 July 2016 Rev. 0 of basis calculation (160268-CA-01, FP101042) issued on 27 July 2016
7 Building Deformation Analyses (1 of 2)
Structure Criteria Schedule Percent Complete Condensate water storage tank Rev. 0 Complete 100%
Containment enclosure building Complete 100%
Containment enclosure ventilation area Rev. 1 Complete 100%
Containment structure Rev. 1 Complete 100%
Equipment hatch missile shield Rev. 0 Complete 100%
Steam generator recovery blowdown bldg.
Rev. 1 Complete 100%
Control room make-up air intake Rev. 1 2Q2017 95%
Electrical cable tunnels Rev. 1 2Q2017 30%
Pre-action valve building Rev. 1 2Q2017 70%
RHR equipment vault Rev. 1 2Q2017 90%
Containment internal structures Rev. 1 3Q2017 20%
Main steam and feed water east pipe chase Rev. 1 3Q2017 10%
Hydrogen recombiner structure Safety-related electrical duct banks and manholes Rev. 1 3Q2017 40%
Emergency feedwater pump building Rev. 1 3Q2017 Fuel storage building Rev. 1 3Q2017 50%
Structures that are/expected to be Stage 3
- Criteria document 150252-CD-03 Rev. 0 was used for the CEB evaluation, all other calculations use criteria document 160268-CD-01.
8 Building Deformation Analyses (2 of 2)
Structure Schedule Control Building 4Q2017 Diesel Generator Building Mechanical Penetration 4Q2017 Personnel hatch area Main steam and feed water west pipe chase Primary auxiliary building 4Q2017 Intake transition structure (Non-Category I) 4Q2017 Service water cooling tower including switchgear rooms 1Q2018 Service water access (inspection) vault 1Q2018 Discharge transition structure (Non-Category I) 1Q2018 Circulating water pumphouse (below el. 21')
2Q2018 Service water pumphouse Piping (RCA) Tunnels 2Q2018 Tank farm area 2Q2018 Waste processing building 2Q2018 Structures that are/expected to be Stage 3
9 Deformation Evaluations Calculations Issued Since Submittal of LAR Structure Calculation Site Visit Report Status Containment Enclosure Building (CEB)*
150252-CA-02 Rev. 0 150252-SVR-01 Rev. 1 150252-SVR-02 Rev. 1 160268-SVR-03 Rev. 0 150252-SVR-03 Rev. 0 150252-SVR-05 Rev. 0 Complete Containment Equipment Hatch Missile Shield 160268-CA-02 Rev. 0 160268-SVR-01 Rev. 0 Complete Condensate Storage Tank (CST) Enclosure 160268-CA-03 Rev. 0 160268-SVR-02 Rev. 0 Complete Containment Building 160268-CA-04 Rev. 0 160268-SVR-04 Rev. 0 Complete Containment Enclosure Ventillation Area (CEVA) 160268-CA-05 Rev. 0 160268-SVR-05 Rev. 0 Complete Residual Heat Removal (RHR) Equipment Vaults 160268-CA-06 Rev. A 160268-SVR-06 Rev. B Draft Steam Generator Blowdown Recovery Building 160268-CA-07 Rev. 0 160268-SVR-07 Rev. 0 Complete Control Room Makeup Air Intake 160268-CA-08 Rev. A 160268-SVR-08 Rev. A Draft
- CEB evaluation was performed prior to submittal of LAR.
10 Conclusions from Building Deformation Analyses For all completed structural evaluations:
- Used consistent and repeatable methods of analysis Criteria Document technical basis required no update Structures shown to maintain structural integrity
- Monitoring locations and associated threshold limits identified and incorporated into SMP Completed structures have been monitored against threshold limits:
- CEB threshold monitoring:
160268-SVR-03 Rev. 0 (for measurements in Oct. 2016) 170400-SVR-03 Rev. 0 (for measurements in April 2017)
- Equipment Hatch threshold monitoring:
OR18 threshold measurements performed (April 2017)