ML16279A053
| ML16279A053 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 01/28/2015 |
| From: | Bergquist D H MPR Associates |
| To: | NextEra Energy Seabrook, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML16279A047 | List: |
| References | |
| SBK-L-16153 0326-0074-CLC-02, Rev 0 | |
| Download: ML16279A053 (13) | |
Text
c --Non-Proprietary Version --Compressive Strength of Concrete at Seabrook Station This appendix includes MPR Calculation 0326-0062-CLC-02, Compressive Strength Values for Concrete at Seabrook Station, Revision 0. MPR-4153 Revision2 C-1
-Non-Proprietary Version -mMPR CALCULATION TITLE PAGE Client: NextEra Energy Seabrook, LLC Project: Title: Approach for Estimating Through-Wall Expansion from Alkali-Silica Reaction at Seabrook Station Compressive Strength Values for Concrete at Seabrook Station MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Page 1 of 8 plus Appendix A Task No. 0326-1405-0074 Calculation No. 0326-0074-CLC-02 Preparer I Date Checker I Date Reviewer & Approver I Date Rev. No. David H. Bergquist January 28, 2015 Christina Hamm January 28, 2015 John W. Simons January 28, 2015 QUALITY ASSURANCE DOCUMENT 0 This document has been prepared, checked, and reviewed/approved in accordance with the QA requirements of I OCFRSO Appendix B and/or ASME NQA-1, as specified in the MPR Nuclear Quality Assurance Program.
- MPR-QA Form QA-3.1-1, Rev. 2
--Non-Proprietary Version -mMPR MPR Associates, Inc. 320 King Street Alexandria, VA 22314 RECORD OF REVISIONS Calculation No. Prepared By Checked By Page: 2 0326-0074-CLC-02 Revision Affected Pages Description 0 All Initial Issue Note: The revision number found on each individual page of the calculation carries the revision level of the calculation in effect at the time that page was last revised. MPR QA Form QA-3.1-2, Rev. 0 mMPR Calculation No. 0326-007 4-CLC-02 Table of Contents -Non-Proprietary Version --Prepared By MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Checked By Page: 3 Revision:
0 1.0 Purpose .................................................................................................................
4 2.0 Summary of Results .............................................................................................
4 3.0 Background
...........................................................................................................
5 4.0 Methodology
.........................................................................................................
6 5.0 Results ...................................................................................................................
6 6.0 References
............................................................................................................
8 A Compressive Strength Data .............................................................................
A-1 MPR QA Form: QA-3.1-3, Rev. 0 mMPR Calculation No. 0326-007 4-CLC-02 1.0 PURPOSE -Non-Proprietary Version -Prepared By MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Checked By Page: 4 Revision:
0 This calculation evaluates available 28-day compressive strength values determined from concrete cylinders during the original construction of Seabrook Station. These values are then displayed on a histogram to show the data distribution, mean, and standard deviation.
Additionally, the data are separated by location and by the strength class of the concrete (i.e. specified compressive strength).
2.0
SUMMARY
OF RESULTS All available 28-day compressive strength data points were compiled to form the histogram given in Figure 1. The average 28-day compressive strength is 5456 psi and the standard deviation is 568 psi. Seventy-five percent of the data fall within one standard deviation of the mean and ninety-four percent of the data fall within two standard deviations of the mean. 60 50 -40 c: 30 a f:! ... 20 10 0 0 0 3184 -40 3752 -30 2 53 Standard Deviation (a) = 568 psi :* . ! ' D I. *c; L_ L __ ---------_ __J -__ J 4320 -2o 4888 -la 5456 Mean 6023 +la 28-DayCompressive Strength (psi) 6591 +2a 7159 +30 2 7727 +40 Figure 1. 28-Day Compressive Strength Values for Concrete Cylinders at Seabrook Station MPR QA Form: QA-3.1-3, Rev. O
-Non-Proprietary Version -mMPR MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Calculation No. Prepared By Checked By Page: 5 0326-007 4-CLC-02 Revision:
0 Table 1 shows the data presented in Figure 1 along with the data categorized by room at Seabrook and by concrete strength class. Table 1. 28-Day Compressive Strength Data for Seabrook Station Mean Standard No. Of Data Min Max % of data % of data Deviation (a) Points within 1 a within 2 a All Data 5456 568 121 4240 7360 75% 94% 3000 PSI 5621 691 50 4270 7360 74% 96% Strength Class 4000 PSI Strength Class 5339 430 71 4240 6150. 70% 99% (Note 1) Containment Enclosure 5426 380 24 4880 6080 67% 100% Building RHR Equipment 5503 491 35 4240 6150 63% 97% Vault EFWPump House 5390 269 12 4950 5870 67% 100% Stairway A RCA Walkway 4891 404 12 4270 5450 50% 100% BEDG 5197 371 21 4600 5840 62% 100% Building B Electrical 6163 705 17 5220 7360 65% 100% Tunnel Note 1: The strength class of 9 samples from the RHR Equipment Room cannot be identified with certainty due to poor resolution of the reference document.
These samples are most likely 4000 psi strength class samples based on their proximity to other 4000 psi strength class samples. See Appendix A for more details. 3.0 BACKGROUND MPR is developing a methodology to determine the through-thickness expansion of concrete structures at Seabrook Station due to the Alkali-Silica Reaction (ASR). The through-thickness expansion is related to the reduction in elastic modulus of the concrete over time. One approach for estimating the original elastic modulus is to calculate it from the 28-day compressive strength of the concrete using an equation from ACI 318 (Reference 1 ). MPR QA Form: QA-3.1-3, Rev. 0 mMPR Calculation No. 0326-007 4-CLC-02 4.0 METHODOLOGY
--Non-Proprietary Version --Prepared By MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Checked By Page: 6 Revision:
0 Seabrook Foreign Print No. 100629 and United Engineers Calculation No. CD-20 (References 2 and 3) include 28-day compressive strength results for concrete used in original construction for the following buildings at Seabrook Station:
- Containment Enclosure Building
- RHR Equipment Vault
- EFW Pump House Stairway A
- RCA Walkway
- B Diesel Generator Building
- B Electrical Tunnel These references provide the 121 data points used in this calculation.
These 28-day compressive strength data points are included in Appendix A. 5.0 RESULTS The average 28-day compressive strength of all data points is 5456 psi and the standard deviation is 568 psi. Seventy-five percent of the data fall within one standard deviation of the mean and ninety-four percent of the data fall within two standard deviations of the mean. Therefore, the mean is a representative value for the 28-day compressive strength of all concrete used at Seabrook.
See Section 2.0 for a histogram of all data points as well as a table of the compressive strength data by room and concrete strength class. Figures 2 and 3 display the data for the 3000 psi and 4000 psi strength class concrete cores, respectively.
MPR QA Form: QA-3.1-3, Rev. o mMPR Calculation No. 0326-007 4-CLC-02 25 20 ,,_ 15 u c QI " cr QI .:.: 10 s 0 0 -Non-Proprietary Version --Prepared By MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Checked By Page: 7 Revision:
0 22 Standard Deviation (o) = 691 psi 3547 4239 4930 5621 6312 7004 7695 28-DayCompressive Strength Figure 2. 28-Day Compressive Strength Values for 3000 psi Strength Class Concrete Cores 30 Standard Deviation (a)= 430 psi 25 25 25 20 > u c: 15 er ... 10 -5 1 0 4479 4909 5339 5769 6199 Strength Figure 3. 28-Day Compressive Strength Values for 4000 psi Strength Class Concrete Cores MPR QA Form: QA-3.1-3, Rev. 0 mMPR Calculation No. 0326-007 4-CLC-02
6.0 REFERENCES
-Non-Proprietary Version -Prepared By MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Checked By Page: 8 Revision:
0 1. ACI 318-71, "Building Code Requirements for Structural Concrete," American Concrete Institute, 1971. 2. Seabrook Foreign Print No. 100629, "Concrete Test Report," Revision 0. 3. United Engineers Calculation No. CD-20, "Design of Mats at El. 20' O" and 0' O" and Walls Below Grade for Electrical Tunnels and Control Building," Revision 4. MPR QA Form: QA-3.1-3, Rev. 0
-Non-Proprietary Version --alMPR MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Calculation No. Prepared By Checked By Page: A-1 0326-007 4-CLC-02 Revision:
0 A Compressive Strength Data Table A-1 contains the 28-day compressive strength data for concrete cores at Seabrook Station. Table A-1: 28-Day Compressive Strengths for Concrete Cores at Seabrook Station Room Sample Compressive Strength Class No. Strength (psi) (psi) 4405 5130 4000 4406 5200 4000 4407 5620 4000 ' 4405A 6080 4000 4406A 5700 4000 4407A 5410 4000 4641 5200 4000 4642 5060 4000 4643 5410 4000 4641A 5980 4000 4642A 6050 4000 Containment Enclosure 4643A 6010 4000 Building 4648 5020 4000 (Reference
- 2) 4649 5090 4000 4650 4950 4000 4655 5380 4000 4656 5240 4000 4657 4880 4000 4648A 5020 4000 4649A 5160 4000 4650A 5360 4000 4655A 5780 4000 4656A 5730 4000 4657A 5770 4000 MPR QA Form: QA-3.1-3, Rev. 0
-Non-Proprietary Version --mMPR MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Calculation No. Prepared By Checked By Page: A-2 0326-0074-CLC-02 Revision:
0 Table A-1: 28-Day Compressive Strengths for Concrete Cores at Seabrook Station Room Sample Compressive Strength Class No. Strength (psi) (psi) 94 6070 3000 95 5780 3000 96 5710 3000 101 5800 3000 102 5730 3000 103 5700 3000 108 6140 3000 109 5960 3000 110 6030 3000 430 5020 4000 1 431 4990 4000 1 432 5060 4000 1 430A 5450 4000 431A 5480 4000 432A 5380 4000 437 6010 4000 RHR Equipment Vault 438 5620 4000 (Reference
- 2) 439 5980 4000 437A 6010 4000 438A 6150 4000 439A 6120 4000 unknown 4670 4000 unknown 4740 4000 unknown 5660 4000 unknown 5450 4000 unknown 5480 4000 unknown 5620 4000 unknown 5700 4000 unknown 5700 4000 unknown 4600 4000 1 unknown 5130 4000 1 unknown 4240 4000 1 unknown 5270 4000 1 unknown 5240 4000 1 1 Concrete strength class cannot be determined with certainty due to poor resolution ofreference document.
-Non-Proprietary Version -mMPR MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Calculation No. Prepared By Checked By Page: A-3 0326-007 4-CLC-02 Revision:
0 Table A-1: 28-Day Compressive Strengths for Concrete Cores at Seabrook Station Room Sample Compressive Strength Class No. Strength (psi) (psi) RHR Equipment Vault unknown 4920 4000 1 590 5700 3000 591 5700 3000 592 5590 3000 590A 4950 3000 591A 5200 3000 EFW Pump House 592A 5240 3000 Stairway A 597A 5290 3000 (Reference
- 2) 598A 5870 3000 599A 5380 3000 604A 5180 3000 605A 5340 3000 606A 5240 3000 489 5310 3000 490 4440 3000 491 4950 3000 489A 5200 3000 490A 5450 3000 RCA Walkway 491A 4880 3000 (Reference
- 2) 484 4470 3000 485 4270 3000 486 4370 3000 484A 5040 3000 485A 5090 3000 486A 5220 3000 unknown 4620 4000 unknown 4700 4000 unknown 4600 4000 unknown 5150 4000 B EOG Building unknown 5660 4000 (Reference
- 2) unknown 5200 4000 315 5520 4000 316 5590 4000 317 5470 4000 315A 5840 4000 MPR QA Form: QA-3.1-3, Rev. o
-Non-Proprietary Version -mMPR MPR Associates, Inc. 320 King Street Alexandria, VA 22314 Calculation No. Prepared By Checked By Page: A-4 0326-0074-CLC-02 Revision:
0 Table A-1: 28-Day Compressive Strengths for Concrete Cores at Seabrook Station Room Sample Compressive Strength Class No. Strength (psi) (psi) 316A 5110 4000 317A 5640 4000 unknown 4600 4000 unknown 4950 4000 B EOG Building unknown 4950 4000 (Reference
- 2) unknown 5380 4000 unknown 5310 4000 unknown 5040 4000 unknown 5340 4000 unknown 5040 4000 unknown 5430 4000 427 5410 3000 428 5220 3000 426A 6560 3000 427A 6490 3000 428A 6100 3000 433 5470 3000 434 5550 3000 B Electrical Tunnel 435 5890 3000 (Reference