ML19301D036

Proposed Exhibit INT050 - Wje Report No. 2014-3453.2 (May 26, 2016)

ML19301D036
Person / Time
Site:	Seabrook
Issue date:	05/26/2016
From:	C-10 Research & Education Foundation, Harmon, Curran, Harmon, Curran, Spielberg & Eisenberg, LLP
To:	Atomic Safety and Licensing Board Panel
SECY RAS
References
50-443-LA-2, ASLBP 17-953-02-LA-BD01, RAS 55389
Download: ML19301D036 (143)

Text

UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION ATOMIC SAFETY AND LICENSING BOARD In the Matter of NEXTERA ENERGY SEABROOK, LLC (Seabrook Station, Unit 1)

Docket No. 50-443-LA-2 ASLBP No. 17-953-02-LA-BD01 Hearing Exhibit Exhibit Number:

Exhibit

Title:

INT050 WJE Report No. 2014-3453.2 (May 26, 2016)

(1) FOREIGN PRINT NO, 1 0 1 0 3 4 000 (6) VENDOR DRAWING OR DOCUMENT NO.

2014 3453.2 (4) PURCHASE ORDER NO COMM. I (SUBT. NO.)

0130003 (9) DESCRIPTION LINE 1 PETROGRAPHIC EXAMINATION OF EQUIPNENT VAULTS LINE 2 CORES (10) VENDORS NAME W J E (11) AR# / REQUESTOR AR 2135300 DESIGN CHKD (12) LOG-IN DATE 0 6 0 1 1 6

/

CE DES (5) JOB NUMBER 9763011 (7) REV.

NO.0 0 0 I(~)szEA (1,4)

DATE (13) -,/CHECK ELEC.

MECH. S MECH.

STRUCT INST.

PIPING (17) FINAL DISTRIBUTION DATE.-~-~

7_,

(15) 1 ~APPROVED 2 [] APPROVED, SUBMIT REVISED DOC.

(18)

(16) DESCRIPTION Sea]3rooL~ Station INITIAL ISSUE SBK00005881

RHR AND CS EQUIPMENT VAULT AT NEXTERA ENERGY SEABROOK STATION Petrographic Examination of Concrete Cores Seabrook, New Hampshire NExTera Final Report May 26, 2016 WJE No. 2014.3453.2 Prepared for."

Mr. Brian Brown N Engineering Supervisor NextEra Energy Seabrook, LLC P.O. Box 300 Lafayette Road Seabrook, New Hampshire 03874 Prepared by."

Wiss, Janney, Elstner Associates, Inc.

9511 North Lake Creek Parkway Austin, Texas 78717 512.257.4800 telI 512.219.9883 fax Texas Registered Engineering Firm F-0093 FP101034 Page 1 of 141 SBK00005882

RHR AND CS EQUIPMENT VAULT AT NEXTERA ENERGY SEABROOK STATION Petrographic Examination of Concrete Cores Seabrook, New Hampshire Derek Cong, Ph.D.

Associate Principal and Petrography John Frazcek, PhD Senior Principal Carl J. Larosche, PE (TX)

Principal and Project Manager Final Report May 26, 2016 WJE No. 2014.3453.2 Prepared for.

Mr. Brian Brown N Engineering Supervisor NextEra Energy Seabrook, LLC P.O. Box 300 Lafayette Road Seabrook, New Hampshire 03874 Prepared by:

Wiss, Janney, Elstner Associates, Inc.

9511 North Lake Creek Parkway Austin, Texas 78717 512.257.4800 tel I 512.219.9883 fax Texas Registered Engineering Firm F-0093 FP101034 Page 2 of 141 SBK00005883

TABLE OF CONTENTS Introduction................................................................................................................................................... 1 Samples and Tests......................................................................................................................................... 1 Samples..................................................................................................................................................... 1 Petrographic Examination......................................................................................................................... :2 Damage Rating Index (DRI)..................................................................................................................... 3 Findings........................................................................................................................................................ 3 General Properties..................................................................................................................................... 3 Aggregate............................................................................................................................................... 3 Paste....................................................................................................................................................... 4 Air Void System.................................................................................................................................... 4 Distress...................................................................................................................................................... 5 Core 1.................................................................................................................................................... 5 Core 2.................................................................................................................................................... 5 Core 3.................................................................................................................................................... 6 Core 4.................................................................................................................................................... 6 Core 5.................................................................................................................................................... 6 Core 6.................................................................................................................................................... 6 Core 7.................................................................................................................................................... 7 Core 8.................................................................................................................................................... 7 Core 9.................................................................................................................................................... 7 Core 10.................................................................................................................................................. 7 Core 11.................................................................................................................................................. 8 Core 12.................................................................................................................................................. 8 Core 13.................................................................................................................................................. 9 Core 14.................................................................................................................................................. 9 Core 15.................................................................................................................................................. 9 Core 16.................................................................................................................................................. 9 Core 18................................................................................................................................................ 10 Core 19................................................................................................................................................ 10 Core 20................................................................................................................................................ 10 DN Measurement................................................................................................................................... 10 Core 1.................................................................................................................................................. 11 Core 2.................................................................................................................................................. 11 Core 7.................................................................................................................................................. 11 Core 10................................................................................................................................................ 11 Core 11................................................................................................................................................ 12 Core 12................................................................................................................................................ 12 Core 16................................................................................................................................................ 12 Core 20................................................................................................................................................ 12 Discussion and Conclusions....................................................................................................................... 12 Summary................................................................................................................................................. 12 Distress Mechanism................................................................................................................................ 14 Alkali-Silica Reaction (ASR).............................................................................................................. 14 Delayed E~ringite Formation (DEF)................................................................................................... 15 Conclusions and Reconunendations........................................................................................................ 15 TaN es.......................................................................................................................................................... 17 Figures........................................................................................................................................................ 22 Appendix - Original Petrographic Data Sheets........................................................................................... 91 --Zfl~~

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RHR AND CS EQUIPMENT VAULT AT NEXTERA ENERGY SEABROOK STATION Petrographic Examination of Concrete Cores Seabrook, New Hampshire INTRODUCTION At the request of Mr. Brian Brown of NextEra Energy Seabrook, LLC (Seabrook)0 Wiss, Janney, Elstner Associates, Inc. (WJE) performed a petrographic examination of nineteen of the twenty concrete cores removed fiom the Residual Heat Removal (RHR) and Containment Spray (CS) Equipment Vault Structure (Equipment Vault) at Seabrook Station, located at 626 Lafayette Road, Seabrook, New Hampshire. The objective of the petrographic examination was to assess the general properties of the concrete, to identify the likely causes of cracking detected in the condition assessment previously performed by WJE, and to determine the relative extent of distress in the concrete.

Construction of Seabrook Station began in 1976 and was completed in 1986. The Equipment Vault is a mostly below-grade, rectangular structure with three intersecting interior walls. Two redundant equipment trains (designated Alpha and Bravo) me housed in the RHR "A" and RHR "B" vault, respectively. The exterior walls are reinforced concrete retaining walls 2 feet, 6 inches to 4 feet thick, and the two vaults are separated by an interior, 2-foot, 6-inch thick reinforced concrete wall. Adjacent structures of various depths are located on the north, east, and south ends of the Equipment Vault, whereas backfill concrete is immediately adjacent to the west end of the vaults. A plan view of the vault is shown in Figure 1.

Narrow gaps in the concrete and ground water leakage were reportedly first observed 15 to 20 years ago.

In the last few years, cracking and degradation of the concrete has progressed, predominately at the interior walls of the structure. WJE performed an initial condition assessment and presented its findings in a report dated March 3, 2015 (Seabrook FP 100903). WJE later performed a follow-up condition assessment and presented a final report on Februmy 4, 2016 (Seabrook 101055). Based on recommendations fiom these WJE reports, the current petrographic examination of drilled cores was undertaken.

Based on the information provided, the approved concrete mix designs included the following: 4-AWR-1, cement 636 pounds per cubic yard; 3-AWR-1, cement 457 pounds per cubic yard; 3-AWR-1/2 (#8), cement 516 pounds per cubic yard; 4-AWR-I-I/2, cement 564 pounds per cubic yard; 4-AWR-67 with Melment, cement 560 pounds per cubic yard; where A represents Master Builders air entraining admixture, MB-AE-10, W represents Master Builders water reducer admixture Pozzolan 300 N, and R represents Master Builders retarder, Pozzolan 300R. These concrete mix designs typically included low alkali Portland cement (i.e. < 0.6% total alkali) and were designed to produce either 3,000 psi or 4, 000 psi compressive strengths at 28 days.

SAMPLES AND TESTS Samples Based on Option 1 of WJEs Proposal for Laboratory Evalua/im~ of Collcrete Cores, dated January 22, 2016, WJE performed on-site petrographic examination of nineteen 4-inch diameter concrete cores removed from various locations in the Equipment Vault. The core locations were based on FP101034 Page 5 of 141 SBK00005886

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RHR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 2 recommendations provided in the WJE report dated Februm3, 4, 2016, and the cores were drilled and retrieved by Seabrook. Table 1 lists the approximate core locations and core descriptions. Core 17 was taken for the purpose of verifying rebar corrosion, and no petrography was performed for the core.

Additional information regarding reinforcement corrosion and vault wall observations, which are not germane to the petrographic analysis, will be provided in a subsequent WJE letter report to be issued as a follow-up to this document.

For convenience of this report, the finished ends of the cores are termed "top" and the fractured ends of the cores are termed "bottom," although all cores were drilled horizontally. Therefore, vertical or longitudinal indicates parallel to the axis of a core and horizontal indicates perpendicular to the axis of a core. It should be pointed out, however, a "longitudinal" crack in a core only means the crack is parallel to the axis of the core. The cores were documented based on WJE SOP 1, Logging Samples (Seabrook FP101002).

The top surface of the cores was a formed finish; many cores contained a paint coating on the top surface.

The bottom surfaces of the cores were fractured. Of the twenty cores, six cores, including Cores 3, 5, 6, 9, 13, and 14, had full-depth longitudinal macroscopical cracks (Figures 2 and 3). Cores 8, 10, 15, and 20 had partial-depth longitudinal lnacroscopical cracks (Figure 4). The cracks were epoxy injected using a cleat, low viscosity epoxy before the drilling to maintain the integrity of the cores, and no core was separated along the crack surface. Cores 5, 11, and 16 were broken transversely at approximately 3 to 4 inches as a result of core obstruction. After the broken core was removed, drilling resumed at a new location approximately 1 inch away flom the original location (Figure 5).

No reinforcement was intersected by any core.

Petrographic Examination Petrographic examination was performed for the entire length of every core, based on the guidelines of ASTM C856, Standard Practice for PeOographic Exami~atio~, of Harde~wd Cow, crete, and the WJE Standard Operation Procedure (SOP) X.1, PeOographic Exami~atio~s (Seabrook FP101001). For the petrographic examination, any cores longer than 6 inches were first cut horizontally into approximately 6-inch long sections to accommodate the maximum length the saw could cut longitudinally. Each section was then cut longitudinally using a diamond blade rock saw. When cracks were present, the longitudinal saw-cut surface was always selected to be perpendicular to the crack surface. For convenience in this report, the saw-cut sections were given an ABCDE nomenclature. Ifa core is cut into four sections, AB represents the top most section, BC represents the top middle section, CD represents the third section, and DE represents the bottom section. For example, Core lAB indicates the top section of Core 1 and Core 1DE indicates the bottom section of the core and the core was cut into four sections. If the core was sufficiently short and was not cut into multiple sections, there will be no letters following the core identification, such as Core 3. Many cores were only cut into two and three sections.

One of the longitudinal sections from each core section was lapped with progressively finer grinding media to achieve a smooth surface. Freshly fiactured surfaces were induced for examination fiom the remaining pieces of the cores. The lapped sections and fiactured surfaces were examined using a stereomicroscope at magnifications up to 80X. Powder mounts of the paste and materials of interest were prepared and examined using a petrographic (polarized light) microscope at magnifications up to 630X. Examination of powder mounts using a petrographic microscope allows identification of minerals in the cement paste, aggregates, and secondaU deposits based on their optical properties. Thin section fabrication and examination were outside of our scope of services for this assignment.

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RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examioation of Concrete Cores May 26, 2016 Page 3 The depth of carbonation of the concrete was measured by applying a phenolphthalein solution to a freshly fractured concrete surface located at and perpendicular to the top surface of the core and measuring the depth of color change. The water to cement ratio (w/c) of the concrete was estimated based on the paste color, hardness, porosity, abundance of residual cement pmticles, and abundance and pal~icle size of calcium hydroxide crystals. The cement content and air content of the concrete were estimated based on the experience of the petrographer.

Damage Rating Index (DRI)

DRI was measured for all core sections in order to obtain a quantified assessment of distress induced by alkali-silica reaction (ASR). Selected distress features, such as cracked aggregate particles, presence of gel, cracks in the cement paste, and reaction rims in aggregate particles, are counted in each one centimeter square superimposed on the entire lapped section of each core. The total number of each distress feature is then multiplied by a predetermined weighting factor. The sum of the above product is then divided by the total number of squares covered and multiplied by 100. The ASR distress in a core is thus represented by a single numerical index. The larger the index, the more severe the ASR-induced distress. The distress features counted and the associated weighting factors are given in Table 2. The DRI measuremeut was based on WJE SOP X.2, Damage Rating Index (Seabrook FP 101000).

A detailed discussion of significance and application of DRI is beyond the scope of this report. Compared to the traditional qualitative approach of petrography, DRI measurement provides a semi-quantitative and more accurate approach to assess and compare ASR-induced distress in different locations of the same concrete structure, or to determine the progress of ASR development over time in the same structure. DRI measurement also allows for graphic presentation and comparison of different ASR-induced distress.

However, there is no universal standard procedure on DRI measurement and, in particular, the assignment of weighting factors to different distress features can be subjective. For example, a crack 1 mil (0.001 inch) wide and a crack 1116 inch wide may have the same weighting factor in DRI measurement, but they obviously represent significantly different stages in ASR development. In addition, if the concrete also contains cracks not caused by ASR, the cracks will still be counted, skewing the results. Nevertheless, DRI measurement provides a unique way to analyze and compare ASR development in large projects with multiple cores and the information obtained is significant with respect to this project.

FINDINGS The nineteen cores examined were similar in major composition but differed slightly in mix propot~ions.

The following general descriptions of the concrete applies to all cores, except as noted otherwise. A summmT of findings is given in Tables 3 and 4 for cores from Train Alpha and Train Bravo, respectively.

The separation of cores into different trains was for convenience of handling the data. The concrete in both trains was essentially the same. The description of distress and measurement of DRI are presented in separate sections. The original petrographic data sheets for each core section, a total of foiV-six, are attached as an appendix to this report.

General Properties Aggregate The aggregates were generally sound, well graded, tightly bonded to the paste, and uniformly distributed through the thickness of all cores (Figures 6 to 24). Freshly fractured surfaces induced during the examination propagated primarily through aggregate particles.

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WJE RHR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 4 The fine aggregate was natural siliceous sand containing a major amount of quartz and minor amounts of feldspar, mica, and granite. The fine aggregate was clear to brown, subangular to subrounded, hard, and dense. The fine aggregate did not contain potentially reactive components for ASR in concrete.

The coarse aggregate was crushed siliceous rock having a nominal maximum size of 3/4 inch. The coarse aggregate was gray to dark gray, hard to moderately hard, dense to relatively dense, and mostly angular.

The coarse aggregate was composed of a major amount of fine-grained quartz and minor to trace amounts ofmicrocl2cstalline qum~z, feldspar, mica, pyrite, and calcite. The aggregate palqticles were not uniform and exhibited variability in both texture and composition. Some particles contained less and finer quartz and exhibited a weak foliation, others contained relatively larger and more abundant quartz and exhibited a massive granular texture. While a more accurate identification of the coarse aggregate will require thin section investigation and review of geological data of the quarry, the overall prope~ties of the coarse aggregate suggest that it was a low grade metamorphic rock called quartzite (Figure 25). Due to the metamorphic nature of the quartzite, while the rock may appear massive and uniform in a quarry, it is texturally and compositionally variable on a much smaller scale, such as on a scale of a few inches. Layers, lenses, and inclusions of different composition and texture are co~mnon factors in this type of metamorphic rock. When the rock was quarried and crushed, such layers and inclusion textures would be destroyed and different padicles might appear as different types of rock. Therefore, all cores contained the same coarse aggregate, but the metamorphic nature of the quartzite dictates its variability in composition and texture, fiom particle to pm"dcle, after crushing.

The microc~2cstalline quartz and possible presence of strained quartz in the quartzite indicate that the aggregate may be potentially reactive in concrete and susceptible to deleterious ASR. Evidence of ASR was detected in several cores examined and will be discussed in details in the section entitled, Distress.

Paste The paste was essentially uniform, gray, hard, dense, and had a semiconchoidal texture. A moderately low amount of residual portland cement pm~icles was detected, most of which were ferrite phases. No supplementary cementitious materials, such as fly ash, slag cement, or silica fume, were detected. Calcium hydroxide crystals fiom cement hydration were moderate in size and concentration. The hydration of the cement appeared to be normal for the age of the concrete.

The depth of carbonation of the cores varied flom less than 1/32 inch up to 114 inch (Tables 3 and 4). The variability in the carbonation depth was not due to different quality of the concrete, but rather a result of different exposure conditions arising from the existence of surface coatings and how well the coatings were bonded to the concrete. Typically, concrete without a coating and with a poorly bonded coating tends to have a relatively deeper carbonation depth.

The compositional and textural characteristics of the paste indicated that the concrete had a moderate w/c, estimated to be in the range of 0.43 to 0.50, slightly variable from core to core (Tables 3 and 4). The portland cement content was estimated to be 6 to 6-1/2 bags (564 to 611 pounds) per cubic yard.

Air Void System The concrete was air-entrained with a total air content estimated to be 2-1/2 to 8 percent, variable fiom core to core (Tables 3 and 4). Some cores had a marginally entrained air void system with air content on the lower end of the estimate (Figure 26). Others were well entrained and had air content in the higher end of FP101034 Page 8 of 141 SBK00005889

RHR m~d CS Equip~nent Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 5 the estimate (Figure 27). Air content was not only highly variable among different cores, it also varied significantly within a given core, for some cores (Figure 28). This was likely due to poor distribution of air entraining admixtures in the fiesh concrete. Cores 2, 6, 8, 13, and 16 exhibited internal variation in air content.

Voids were mostly coarse and irregular, consistent with entrapped air voids, when the total air content was low, and became fine and spherical, due to purposeful entrainment, when the air content was high. Voids were uniformly distributed for most cores except for those indicated in Tables 3 and 4. Voids in most cores were flee of secondary deposits, indicating that the concrete in the sampling locations had not been exposed to significant internal moisture migration. These cores typically exhibited no evidence of ASR. For other cores, especially those with significant evidence of ASR, abundant secondary ettringite deposits were detected in air voids (Figures 29 and 30). This observation suggests that concrete represented by cores with evidence of ASR had been exposed to significant moisture movement.

Distress The cores exhibited different types of distress and to different extents, and therefore, are described separately.

Core 1 Core 1 was taken from the south face of the north exterior wall at -61 feet. The core was 19-1/2 inches long and resulted in four lapped sections. The core contained a longitudinal crack at the surface that was up to 5 mils wide. The crack narrowed down at approximately 1/2 inch fiom the top surface and propagated through aggregate particles (Figure 31). No evidence of ASR was detected in the top region of the core represented by Core 1 AB; very limited but unambiguous evidence of ASR was detected in Core 1 BC, CD, and DE, including an isolated case of reaction rims in coarse aggregate and microcracks filled with alkali-silica gel extending out from aggregate into the paste (Figures 32 and 33).

No other distress was detected.

Core 2 Core 2 was taken from the east face of the west exterior wall at -31 feet. The core was 18-1/2 inches long and resulted in thiee lapped sections. The core contained one longitudinal crack that was 3/8 inch long, up to 6 mils wide, and propagated thiough aggregate particles (Figure 34). This crack was likely related to the ASR distress in the core.

Abundant evidence of severe ASR was detected in the core. The evidence was primarily manifested in the forms of very abundant reaction rims around reactive coarse aggregate particles and considerable cracking filled with gel withiu reactive aggregate particles or extending into the paste (Figures 35 to 40), and abundant microcracks in the paste, most of which were filled with alkali-silica gel (Figures 41 to 43). In addition, many air voids were coated or completely filled with gel (Figure 44 and 45). Many aggregate particles exhibited multiple manifestations of ASR, such as reaction rims, cracking, and cracks filled with gel (Figure 46). The cracks in the core were up to 3 inches long and 30 mils wide. While the cracks were essentially randomly oriented, many were subparallel to the top surface of the core. Given the fact that abundant microcracks were present, only limited intersections of microcracks were detected (Figure 47).

Fresh (still soft and sticl~) alkali-silica gel was also detected on the lapped section of the core (Figure 48).

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RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 6 The fiesh gel was formed due to the additional exposure to moisture fiom cutting and lapping of the core, indicating significant potential reactivity of the concrete.

The reactive aggregate in the core was qum~tzite, as discussed in the General Property section.

It was also noted that secondary ettringite deposits were detected in many air voids, sometimes even co-existing with alkali-silica gel in a single void (Figure 49). However, no ettringite deposit was detected in any cracks or aggregate/paste interfaces.

It appeared that the second section of the core contained more cracks with gel than the other sections. A more quantitative comparison of ASR distress in different sections is given in the DRI Measurement section.

No other distress was detected in the core.

Core 3 Core 3 was taken fiom the west face of the east interior wall at -31 feet. The core was 3-1/2 inches long and contained a full-depth longitudinal crack (Figure 8). The crack was up to 100 mils wide near the top surface and branched out at approximately 1-1/4 inch fiom the top surface (Figure 50). The crack propagated through aggregate particles.

No evidence of ASR was detected. No evidence of other deterioration was detected.

Core 4 Core 4 was taken fiom the no~th face of the middle wall at -31 feet. The core was 4-3/4 inches long and contained an approximately 1/2-inch long longitudinal crack that propagated essentially around aggregate particles (Figure 51). The crack was less than 1 rail wide.

No evidence of ASR was detected. No evidence of other deterioration was detected, Core 5 Core 5 was taken from the north face of the middle wall at -31 feet. The core was 12-3/8 inches long and resulted in two lapped sections. The core contained a full-depth longitudinal crack that propagated through aggregate particles (Figure 10). The crack was up to 95 mils wide and exhibited no evidence of narrowing at the bottom end of the core.

No evidence of ASR was detected. No evidence of other deterioration was detected.

Core 6 Core 6 was taken fiom then no~th face of the middle wall at -31 feet. The core was 13-1/2 inches long and resulted in two lapped sections. The core contained a full-depth longitudinal crack that propagated through aggregate particles (Figure 11). The crack was up to 95 nails wide and exhibited no evidence of narrowing down at the bottom end of the core.

No evidence of ASR was detected except a very weak reaction rim around a coarse aggregate pm~ticle. No evidence of other deterioration was detected.

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RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 7 Core 7 Core 7 was taken fiom the south face of the north exterior wall at -31 feet. The core was 18 inches long and resulted in three lapped sections. The core contained no full-depth longitudinal cracks or other macroscopical cracks.

The core exhibited evidence of ASR, including reaction rim in coarse aggregate particles (Figure 52),

cracked reactive aggregate particles with solne crack extending out into the paste (Figures 53 and 54), and gel-filled air voids (Figure 55). The overall extent of ASR distress appeared to be minor, and the extent of ASR was more advanced in sections BC and CD than in section AB.

Similar to Core 2, for which severe ASR was detected, most air voids were coated with secondary ettringite; however, no ettringite was detected in cracks.

No evidence of other distress was detected.

Core 8 Core 8 was taken from the south face of the north exterior wall at -11 feet. The core was 20-3/4 inches long and resulted in four lapped sections. The core contained an 11-inch long longitudinal crack that propagated though aggregate pmqcicles. The crack was up to 30 mils wide in Core 8 AB and Core 8 BC, but was narrowed and terminated at 3/4 inch from the saw-cut top surface of Core 8 CD (Figure 56). While the crack was a continuous single crack, small branches were observed from the main crack (Figure 57).

No evidence of ASR or other distress was detected.

Core 9 Core 9 was taken from the south face of the north exterior wall at -31 feet. This core was 2-1/2 inches long and contained two full-depth longitudinal cracks (Figure 14). The cracks propagated around aggregate particles and were up to 30 mils wide. The crack branched out with shifting locations, where one branch stopped and another continued (Figure 58).

No evidence of ASR was detected. No evidence of other deterioration was detected.

Core 10 Core 10 was taken fiom the south face of the north exterior wall at -9 feet. The core was 18-1/2 inches long and resulted in tluee lapped sections. The core contained one longitudinal crack that propagated through aggregate particles and was up to 30 mils wide. The crack narrowed and terminated at approximately 3-3/4 inches fiom the top surface of the core (Figure 15a). Prior to the termination, the crack propagated tluough a reactive particle with multiple cracks filled with alkali-silica gel (Figure 59).

Moderately abundant evidence of ASR was detected in the core, and became more abundant in Core 10 BC and Core 10 CD than Core 10 AB. The overall extent of ASR was assessed as moderate. Similar to other cores with ASR, the evidence of ASR was primarily manifested in the forms of abundant reaction rims around reactive aggregate particles; considerable cracking of reactive aggregate pm~icles, some filled with gel, within the aggregate particles or extending into the paste (Figures 60 to 62); abundant microcracks in the paste, many of which were filled with alkali-silica gel (Figure 63); and gel-filled voids (Figure 64). In FP101034 Page 11 of 141 SBK00005892

WlEI RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 8 addition, a ball of fiesh clear gel was detected on the lapped section of the core (Figure 65). The flesh gel was formed due to the additional exposure to moisture flom cutting and lapping of the core, indicating significant potential reactivity of the concrete.

While some air voids were coated or filled with alkali-silica gel, many voids were coated with secondary ettringite (Figure 66). Some voids were located next to each other but were coated with either gel or ettringite (Figure 67). In another case, it appeared that a void coated with ettringite was later covered with gel (Figure 68). It was also observed that seconda~2¢ ettringite ctTstals precipitated sparsely in a wide crack (Figure 69).

No other distress was detected in the core.

Core 11 Core 11 was taken fiom the north face of the south exterior wall at -61 feet. The core was 21 inches long and resulted in four cut and lapped sections. It contained multiple surface coatings that were poorly bonded to each other and the concrete (Figure 70). A total of six individual layers could be identified, with each layer having variable thickness. The total thickness of the multiple layers was up to 21 mils.

While the concrete contained no macroscopical cracks, it contained ve~2z abundant microcracks. The microcracks were mostly randomly oriented, with a majority more or less parallel to the top surface. The cracks were up to 3-l/2 inches long and 8 mils wide. These cracks were induced by ASR.

Significant evidence of severe ASR was detected in the core, and appeared to be more or less consistent in different sections of the core. Similar to other cores with ASR, the evidence of ASR was primarily manifested in the forms of abundant reaction rims around reactive aggregate particles; considerable cracking of reactive aggregate particles, some filled with gel, within the aggregate particles or extending into the paste; abundant microcracks in the paste, many of which were filled with alkali-silica gel; and gel-filled voids (Figures 7l to 75).

Similar to other cores with ASR, many voids in the core were coated with secondm2 ettringite. No other distress was detected in the core.

Core 12 Core 12 was taken from the north face of the south exterior wall at -41 feet. The core was 18 inches long and resulted in three lapped sections. Abundant microcracks were detected in the core. The microcracks were up to 3-1/2 inches long and up to 9 mils wide. While most microcracks were randomly oriented, many were subparallel to the top surface of the core (Figure 17). These cracks were due to ASR.

Significant evidence of severe ASR was detected in the core, and it appeared to be more or less consistent in different sections of the core. Similar to other cores with ASR, the evidence of ASR was primarily manifested in the forms of abundant reaction rims around reactive aggregate particles; considerable cracking of reactive aggregate particles, some filled with gel, within aggregate particles or extending into the paste; abundant microcracks in the paste, many of which were filled with alkali-silica gel; and gel-filled voids (Figures 76 to 81).

Unlike other cores with ASR, significant evidence of ASR was detected for Core 12 neat" the surface region (Figures 82 and 83).

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I/~IR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 9 Similar to other cores with ASR, many voids of the core were coated with secondary ettringite. No other distress was detected in the core.

Core 13 Core 13 was taken from the south face of the middle wall at -31 feet. The core was 12-1/4 inches long and resulted in two lapped sections. The core contained a full-depth longitudinal crack that branched out at several locations (Figure 18 and Figure 84). The crack propagated tluough aggregate particles, did not narrow down toward the bottom of the core, and was as much as 95 mils wide in Core 13 BC.

No evidence of ASR was detected. No evidence of other deterioration was detected.

Core 14 Core 14 was taken from the south face of the middle wall at -31 feet. The core was 5 inches long and contained a full-depth longitudinal crack that propagated tl-uough aggregate particles (Figure 19). The crack was 95 rail wide and did not nmrow toward the bottom of the core.

No evidence of ASR was detected. No evidence of other deterioration was detected.

Core 15 Core 15 was taken from the south face of the middle wall at -29 feet. The core was 12 inches long and resulted in two lapped sections. The core contained a longitudinal crack that propagated through aggregate particles (Figure 20). The crack was 95 rail wide and extended out of the core at approximately 5-5/8 inches flom the top surface. Similar to other cores with long longitudinal cracks, the crack often branched out.

No evidence of ASR was detected. No evidence of other deterioration was detected.

Core 16 Core 16 was taken from the east face of the west exterior wall at -31 feet. The core was 18-1/2 inches long and resulted in three lapped sections. No long longitudinal cracks were detected in the core; however, a moderate amount of microcracks were detected. The cracks were up to 3 inches long and 5 mils wide.

Moderately abundant evidence of ASR was detected in the core. The evidence was weak and limited in the top section of the core (Core 16 AB) and significantly increased toward the bottom section (Core 16 CD).

The overall extent of ASR was judged to be moderate. The evidence manifested itself in similar forms as other cores with ASR, including abundant reaction rims around reactive aggregate particles; considerable cracking of reactive aggregate particles, some filled with gel, within aggregate particles or extending into the paste; abundant microcracks in the paste, many of which were filled with alkali-silica gel; and gel-filled voids (Figures 85 to 87).

Similar to other cores with ASR, many voids of the core were coated with secondary ettringite. No other distress was detected in the core.

FP101034 Page 13 of 141 SBK00005894

RHR and CS Equipmeut Vault at NextEra Energy Seablook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 10 Core 18 Core 18 was taken fiom the north face of the middle wall at -61 feet. The core was 2-3/4 inches long with both the top and bottom surface fiactured (Figure 22). The core contained no cracks and no evidence of distress.

Core 19 Core 19 was taken fiom the south face of the middle wall at +3 feet. The core was 11-1/2 inches long and resulted in two lapped sections (Figure 23). No cracks or other forms of distress were detected in the core.

The top surface of the core contained surface paint and was intact (Figure 88).

Core 20 Core 20 was taken from the east face of the west exterior wall at ground level. The core was 18-1/2 inches long and resulted in four lapped sections. The core contained two horizontal cracks that separated the core into three portions. The central portion was then cut into two (Figure 24).

A full-depth longitudinal crack approximately 5 inches long was detected in Core 20 AB, which propagated through aggregate particles. The crack was up to 30 mils wide and contained no alkali-silica gel deposits.

Similar to other long longitudinal cracks, the longitudinal crack also branched out (Figure 89). No longitudinal crack was detected in Core 20 BC.

Core 20 AB exhibited no evidence of ASR. The core was also exposed to very limited moisture movement because most air voids were essentially flee of secondary ettringite.

Limited evidence of ASR was detected in the other three sections of the core, and the evidence appeared to be much more abundant in Core 20 DE than in sections BC and CD. Even so, the overall extent of ASR was judged to be minor.

Similar to other cores with ASR, the evidence of ASR included cracked reactive coarse aggregate, cracks extending out from reactive pm~icles into the paste, cracks in the paste and air voids filled with gel (Figures 90 to 92).

Also similar to other cores with ASR, most voids in Core 20 BC, CD, and DC were coated with secondary ettringite, suggesting that the concrete was exposed to internal moisture movement. In an air void, it was observed that calcium hydroxide and ettringite deposited together (Figure 93).

DRI Measurement The results of the DRI measurement, normalized for each individual core, are given in Table 5 and Figure 94. The results clearly identified eight cores with unambiguous evidence ofASR. Ttnee cores, Cores 2, 11, and l 2, with total DRI values greater than 350, exhibited the most severe ASR. Two cores, Cores 10 and 16, with total DRI greater than 200, exhibited moderate ASR. Two additional cores, Cores 7 and 20, with total DRI greater than 85, also exhibited noticeable ASR, albeit to a much less significant extent. These conclusions are consistent with the results of the petrographic examination. Petrographic examination also indicated that vm2 limited but unambiguous evidence of ASR was detected in Core 1 BC, CD, and DE; the total DRI for the core, however, was only 17. Nevertheless, the total Dill had a contribution of unambiguous evidence of ASR.

FP101034 Page 14 of 141 SBK00005895

WJE RIIR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page l I The other eleven cores had DRI values between 8 and 83. Further examination of the data clearly demonstrated that these values were primarily due to cracks in the paste as well as aggregate pm~icles. Out of the eleven cores, eight cores contained large longitudinal cracks that were either full depth or partial depth. While the cause of these longitudinal cracks in the cores will be fnl~ther discussed in the Discussion section, these cores did not contain distress unambiguously attributable to ASR, such as cracks with gel in the paste or aggregate. Results of the petrographic examination also indicated that theses cores exhibited no evidence of ASR. Since the Dill measurements for these cores were primarily due to the large cracks in the cores, and not obvious ASR-induced distress, the DRI measurements for these eleven cores are not true measurements of ASR distress in these cores. Therefore, no fresher discussion is warranted for these cores.

For the eight cores that exhibited unambiguous evidence of ASR, the DRI data provided detailed depiction of ASR development in each core section. Such details are otherwise unresolvable by typical petrographic examination. Therefore, the DRI data for each core is discussed further below.

Core 1 The total DRI for the core was very low at 17, and distress due to ASR was very minor. The core resulted in four lapped sections, with no ASR-induced distress in the top two sections, except for reaction rims in some aggregate particles in Core I BC. The bottom two sections exhibited unambiguous evidence of ASR, with gel-filled cracks in the paste and reactive aggregate particles (Figure 95).

Core 2 Core 2 exhibited severe ASR with a total DRI of 400. The core resulted in thiee lapped sections, with the top section exhibiting significantly more severe ASR than the middle and bottom sections (Figure 96). The total DRI for the top po~tion was 561, while the total DRI for the middle and bottom portion was 341 and 315, respectively. The most significant contributor to the DRI measurement was gel in cracks in paste, followed by gel in cracked aggregate particles. The unique feature of ASR in the concrete was abundant gel production.

Core 7 The core resulted in three lapped sections and had a total DRI of 86, with the top section exhibiting significantly less ASR than the middle and bottom sections (Figure 97). The total DRI for the top portion was 35, while the total DRI for the middle and bottom portions was 109 and 112, respectively. The most significant contributor to the DRI measurement was gel in cracks in paste, followed by gel in cracked aggregate pm~ticles. In addition, cracks without gel in the cement paste also contributed significantly to the total DRI measurement.

Core 10 The core resulted in tluee lapped sections and had a total DRI of 219, with the top section exhibited significantly less ASR than the middle and bottom sections (Figure 98). The total DRI for the top portion was 102, while the total DRI for the middle and bottom portions was 261 and 267, respectively. The most significant contributor to the DRI measurement was gel in cracks in paste, followed by gel in cracked aggregate particles. In addition, cracks without gel in the cement paste also contributed significantly to the total DRI measurement.

FP101034 Page 15 of 141 SBK00005896

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 12 Core 11 The core resulted in four lapped sections and had a total DRI of 358. While the top portion exhibited the lowest DRI of the four sections, the difference was insignificant (Figure 99). The total DRI for the core, from top to bottom, was 290, 416, 326, and 332, with the middle top section significantly higher than the other three sections. The most significant contributor to the DRI measurement was gel in cracks in paste, followed by gel in cracked aggregate pm~icles. The contribution fiom cracks without gel in the cement paste to the total DRI measurement was negligible. It appeared that more abundant gel was produced as ASR developed further.

Core 12 The core resulted in of three lapped sections and had a total DRI of 383, with the three sections exhibiting very similar total DRI (Figure 100). The total DRI was 379, 387, and 382 for the top, middle, and bottom sections, respectively. The most significant contributor to the DRI measurement was gel in cracks in paste, followed by gel in cracked aggregate particles. Contribution to DRI from cracks without gel in the cement paste was limited. The ASR in the core was also a gel-rich process.

Core 16 The core resulted in three lapped sections and had a total DRI of 203. The DRI exhibited significant increase fiom the top section to the bottom section (Figure 101). The total DRI was 58, 162, and 344 for the top, middle, and bottom sections, respectively. Similar to the other cores, the most significant contributors to the DRI measurement was gel in cracks in paste and gel in cracked aggregate particles.

Core 20 The core resulted in four lapped sections and had a total DRI of 107. Similar to that of Core !6, the Dill of Core 20 also exhibited a significant increase fiom the top section to the bottom section (Figure 102). The total DRI for the core, fiom top to bottom, was 28, 71,107, and 196. The top portion of the core contained no unambiguous evidence of ASR. The measured DR! was primarily due to a longitudinal crack in that core section. Unambiguous evidence of ASR was detected from section BC down. In the bottom section, the most significant contributor to the DRI measurement was gel in cracks in paste, followed by gel in cracked aggregate particles. The core further confirmed that more abundant gel was produced as ASR developed further.

DISCUSSION AND CONCLUSIONS Summary The concrete represented by the nineteen cores (forty-six sections) examined was si~nilar and represented the same concrete mix design. The concrete was air-entrained and contained crushed quartzite coarse aggregate, natural siliceous sand fine aggregate, and portland cement. The estimated w/c was in the range of 0.43 to 0.50. The portland cement content was estimated to be 564 to 611 pounds per cubic yard. The air content varied from 2-1/2 percent to 8 percent. The variability of mix proportions fiom core to core was primarily due to variability that occurred in the batching, mixing, and placement of the fresh concrete, rather than different concrete mix designs. Variable air content was also detected within many individual cores, consistent with this assessment.

FP101034 Page 16 of 141 SBK00005897

RHR and CS Equiplnent Vault at NextEra Energy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 13 Due to tim limited information regarding to the concrete mix design, WJE could not determine whether the mix proportions of the concrete represented by the cores were consistent with the original concrete mix design. However, the overall property of the concrete suggests that it was likely a 4,000- psi class concrete.

The concrete represented by the cores exlfibited significant cracking. Of the nineteen cores examined, only two cores, Core 18 and Core 19, exhibited no detectable cracks. Eight cores, Cores 1, 2, 7, 10, 11, 12, 16, and 20, exhibited various degrees of microcracking, which was due unambiguously to ASR. The evidence of ASR manifested primarily in the forms of abundant random microcracks in the paste and/or reactive quartzite coarse aggregate particles, and the cracks were often filled with abundant alkali-silica gel. The cracks were up to 3-1/2 inches long and 30 mils wide. The extent of ASR varied significantly fiom core to core, or even within individual cores. Core 1 had very limited distress due to ASR with a total DRI of 17.

Core 7 and Core 20 had minor ASR with a total DR! of 86 and 107, respectively. Core 10 and Core 16 had moderate ASR with a total DRI of 219 and 203, respectively. Core 2, Core 11, and Core 12 all exhibited severe ASR with a total DRI of 400,358, and 383, respectively.

All eight cores with ASR were drilled from the exterior walls of the Equipment Vault. While some voids in theses cores were coated or filled with alkali-silica gel, due to ASR, the majority of the air voids in these cores were coated with secondal2¢ ettringite deposits, suggesting that the concrete bad been exposed to internal moisture movement.

Within each core, tile extent of ASR was also different depending on tile locations of the cores. Of the eight cores with ASR, Core 2 was the only one that exhibited the most severe ASR in the top portion of the core.

All other cores either exhibited significantly less ASR in the top portions than the deeper potLions or a similar extent of ASR between the top portions and deeper portions. This observation suggests that ASR in the concrete was likely initiated and controlled by a factor from deep inside the concrete, rather than flom the top surface of the concrete. The development of ASR was controlled by availability of moisture coming from the exterior end of the walls.

Nine cores exhibited craclcs that did not appear to be directly related to ASR distress. Core 4 contained a 1/2-inch long longitudinal crack that was less than 1 rail wide. Six cores, Core 3, Core 5, Core 6, Core 9, Core 13, and Core 14, contained full-depth longitudinal cracks that propagated ttuough aggregate particles and were mostly up to 95 mils wide, except for Core 9, which was 30 ~nils wide. Cracks in these cores did not exhibit a trend of narrowing down as the depth of the cores. Two additional cores, Core 8 and Core 15, had partial-depth longitudinal cracks that were up to 30 mils wide. All these cores also exhibited clean air voids with essentially no secondary deposits, suggesting that the concrete represented by these cores had not been exposed to significant internal moisture movement. Further examination indicates that these cores, except for Core 8 and Core 9, were all extracted from the interior or middle walls and were not exposed to external moisture.

While the possibility of shrinkage-induced or thermal-related volume change could not be completely ruled out for these cores with large cracks, a more logical explanation is that the cracks in these cores were volume change cracks as a result of ASR distress in the adjacent walls. Expansion of the exterior walls due to ASR caused overall volume change of the Equipment Vault, which resulted in the large cracks in tile middle walls of the vault.

FP101034 Page 17 of 141 SBK00005898

WJE I NGI N t I R~

RHR aod CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 14 Distress Mechanism Alkali-Silica Reaction (ASR)

A detailed discussion of the mechanism of ASR is beyond the scope of this report. Briefly, ASR is a chemical reaction occurring between reactive siliceous aggregate pmticles and hydroxyl ions of the pore solution in hardened concrete. The reaction product is an amorphous gelatinous material that contains silicon, alkalis, calcium, and water, which swells when moisture is absorbed and can cause expansion and cracldng in concrete structures. The high concentration of hydroxyls (high pH value) typically found in the pore solution of portland cement concrete is a result of and maintained by the release of alkali ions (potassium and sodium) from the hydration of portland cement. The reactive aggregate is normally an amorphous silica material (lack of long range order at atomic level, such as chert), or a silica whose long range order was destroyed due to strain and stress, such as strained qumlz. Quartz is one of the most stable minerals on emqth, which had an interconnected framework of silicon oxide tetrahedra at atomic level. When qumO~z is exposed to stress, such as during a metamorphic process, the long range framework of tetrahedra is destroyed and replaced with broken bonds of silicon oxides and becomes susceptible to potential ASR.

The quartzite coarse aggregate in the concrete contained two reactive components. One was micromystalline quartz and the other was strained quartz.

ASR will not necessarily occur in concrete with reactive aggregate and high alkali load. Three prerequisites must be met simultaneously for ASR to occur: reactive aggregate, sufficient alkali load in the concrete, and available moisture. Moisture movement within the concrete is the driving force of ASR. ASR is typically initiated as microcracks in the reactive aggregate particles, which extend into the surrounding paste and often are filled with gel. The cracks in turn allow more and easier moisture migration, resulting in more reactive particles to participate in the reaction. The process is typically self-sustained as long as moisture is supplied.

We know low alkali Portland cement was predominately used in the concrete based on the Certified Material Test Reports (CMTRs) provided by the cement manufacturers and independent laboratory testing performed by Pittsburg Testing Laboratory (PTL) on every 1200 tons of Portland cement delivered to Seabrook during the construction phase of the plant. While we do not know the alkali content of the hardened concrete, the occurrence of ASR in the concrete suggests that it was sufficiently elevated for ASR to occur. The reactive aggregate in the concrete was the primau component of the aggregate and was abundant. Even for cores with severe ASR, such as Core 2, Core 11, and Core 12; however, there was stil!

a significant number of quartzite particles that had not exhibited evidence of ASR. Therefore, the concrete represented by the cores should have significant potential for continued development of ASR, as long as the moisture supply is maintained.

All cores with ASR were from the exterior walls with the source of the moisture flom the exterior sides of the walls, or from the bottoms of the cores toward the top surfaces of the cores. Because of the same composition and mix proportions of the concrete for different cores and across the depth of a given core, it is reasonable to assume that the different ASR development in a given core was due to limitation of available moisture. For the three cores with the most severe ASR, Core 2, Core 11, and Core 12, the top pmlions exhibited either more severe ASR (Core 2), or similar ASR as the interior (Core 11 and Core 12).

This observation suggests that the ASR for these cores was at a steady state, unlimited by the availability of moisture. Sufficient moisture had reached to the top surface of the coucrete, and ASR development was only limited by the intrinsic property of the concrete, such as available alkali and reactive aggregate, but was not restrained by the availability of moisture. While the rate of ASR might have been in a steady state FP101034 Page 18 of 141 SBK00005899

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 15 for these cores, the ASR-induced distress would be accumulative and deeper in the walls, much more significant distress is expected.

For the other five cores with moderate and/or minor ASR, Core l, Core 7, Core 10, Core 16, and Core 20, the top portions of the cores always exhibited significantly less development of ASR than the conesponding deeper pollions of the cores. This observation suggests that the ASR development near the top surface of the cores was limited by the availability of moisture. Deeper in the walls where these cores were taken and moisture availability was not an issue, ASR development might have been significantly more advanced than the cores suggest. Therefore, more significant distress induced by ASR is expected for the deeper portions of the walls represented by these cores, due to increased rate of reaction and accumulative effect of distress.

Delayed Ettringite Formation (DEF)

All cores with ASR also contained abundant secondary ettringite deposits in air voids; therefore, it is necessary to discuss the possibility of another internal expansion mechanism that involves seconda~7 ettringite, which is known as delayed ettringite formation (DEF). Ettringite is a normal hydration product of portland cement and is typically innocuous in hardened concrete. The amount of ettringite produced during cement hydration depends on the composition of the cement and curing conditions of fresh concrete.

When the internal temperature of concrete is 70 degrees Celsius (approximately 160 degrees Fal-uenheit) or above, whether due to external high temperature curing or internal heat of hydration, the normal formation ofettringite is interrupted, and no ettringite will form in concrete. After concrete is in service and exposed to moisture, components of ettringite will migrate to convenient locations, such as aggregate/paste interfaces, and precipitate out. This will cause a uniform paste expansion, resulting in peripheral cracking around aggregate particles and network cracking in the paste. The unique characteristics of DEF is peripheral cracking and abundaut ettringite deposits in cracks. We did not detect any peripheral cracking in the concrete. The paste/aggregate bond was typically tight and strong. The microcracks were primarily filled with alkali-silica gel, and not ettringite.

Since ettringite was a typical hydration product of portland cement and has a relatively high solubility, it was often observed as secondary deposits in air voids of concrete, as a result of moisture migration within the concrete. As in the cores examined herein, the ettringite coating of many air voids in the concrete only occurred in cores with evidence of ASR, which was clearly involved with moisture movement. Therefore, the ettringite coating of voids in the concrete was an indication of internal moisture movement, rather than an indication of internal expansion involving ettringite. The concrete represented by the cores exhibited no evidence of DEF, and no DEF is expected in the future.

Conclusions and Recommendations Based on the petrographic examination of nineteen concrete cores retrieved from different locations of the walls of the Equipment Vault, eight cores, all from exterior walls, exhibited variable extent of ASR-induced distress, from minor to severe. ASR-induced expansion may also be responsible for large longitudinal cracks in many cores taken from interior walls. While the extent of ASR distress in the examined cores was variable, more significant ASR-induced distress is expected in the deeper portions of the exterior walls, which have greater access to moisture. Further, ASR is expected to continue to develop unless the moisture supply is interrupted.

FP101034 Page 19 of 141 SBKO0005900

WJE RttR mad CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 16 To further evaluate the ASR development rate and associated distress in the Equipment Vault, additional testing is recommended. In light of the information obtained from the petrographic examination, WJE reconnnend the following tests:

Accelerated Expausion Tests should be performed to assess the potential for additional ASR in the RHR vaults.

o Accordingly, we recommend the following sampling plan:

Six 12-inch long and 3-inch diameter cores should be taken for Alpha and Bravo Train separately. All cores should be taken from the exterior walls in the vicinity of the cores that have exhibited severe, moderate, and minor ASR. Cores should be taken at two severe, two moderate, and two minor ASR locations.

Two additional cores from the middle wall between the trains should be taken and tested in the same way. As the concrete for the middle wall is likely the same as that used for the exterior walls, we expect these cores to undergo ASR expansion once they are provided sufficient moisture.

Once the Invar wire extensometer instrumentation and the core expansion testing have completed a twelve month cycle, we will have data that will provide a greater understanding regarding the rate of ASR expansion and the potential for additional future expansion. DRI could be used to further quantify the results learned fiom the referenced instrumentation and expansion testing by selecting companion cores to some of the cores examined in this study. Accordingly, we recommend the following:

DRI Comparative Study. Take three cores pet train at the vicinity of the cores exhibiting severe, moderate, and minor ASR after twelve months of extensometer and expansion data acquisition and perform DRI measurement to assess the development of ASR in the concrete under in-service conditions.

FP101034 Page 20 of 141 SBK00005901

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 17 ID 1

2 3

4 5

7 8

10 17 18 11 12 13 14 15 16 19 20 TABLES Train Alpha B ravo Eleva-Wall tion North Exterior Wall 0" (South Face)

West Exterior Wall 0" (East Face)

East Interior Wall 0" (West Face)

Middle Wall 0" (North Face)

Middle Wall 0" (North Face)

Middle Wall 0" (North Face)

North Exterior Wall 0" (South Face)

North Exterior Wall

-I 1 -0" (South Face)

North Exterior Wall 0" (South Face)

North Exterior Wall 0" (South Face)

Middle Wall 0" (North Face)

Middle Wall 0" (North Face)

South Exterior Wall 0" (North Face)

South Exterior Wall 0" (North Face)

Middle Wall 0" (South Face)

Middle Wall 0" (South Face)

Middle Wall 0" (South Face)

West Exterior Wall 0" (East Face)

Middle Wall

+3 -2" (South Face)

West Exterior Wall (East Face) 1/2" Table 1. Core Locations and Descriptions Length Field Comments (in.)

8-8" west of wall, 16-7" above -

61 level 3-10" fiom north ext. ~vall 3-8" above -31 grate 7-0" fiom middle, 1-0" above -31 grate 6-6" fiom west interior wall; 3-6" above concrete floor (-31 level) 5<3" fiom west interior wall; 3-7" above concrete floor (-31 level) 6-0" fiom west interior wall; 5-10" above grate floor (-31 level) 1 -6" off west int. wall 2-6" above -31 grating 7-0" west of west ext. wall 5-0" above grating.

7-6" tiom west interior wall; 5-3" above concrete floor (-31 level) 7-8" ftOlll ~vest interior wall; 3-4" above grate floor (-9 level) 1-6" fiom west exterior wall; 2-9" above concrete floor 2-0" fiom west exterior wall; 2-4" above concrete floor 4-4" fiom west exterior wall; 0-10" above concrete floor (-61 level) 6-0" ~vest of west exterior wall and 6" above construction joint.

6-2" from east interior wail; 2-4" above grate floor (-31 level) 4-3" fiom east interior wall; 3-1" above grate floor (-31 level)

Through delaminated area and 30-rail crack. 8 east of west exterior wall and 4 above grating.

4-1" fioln south exterior wall; 0-9" above grate floor (-31 level) 5-8" east of east int. wall 2-4" above 3-2" grating 5-2" south of middle wall 2-2" above 0-0" grating 19-1/2 18-1/2 3-1/2 4-3/4 12-3/8 13-1/2 18 20-3/4 2-1/4 18-1/2 2

2-3/4 21 18 12-1/4 5

12 18-1/2 11-1/2 18-1/2 Description Cut into four sections Cut into three sections Full-depth longitudinal crack Full-depth longitudinal crack, top 4-1/2 inch shafted Full-depth longitudinal crack, broken horizontally into two sections Cut into three sections Partial-depth longitudinal crack Full-depth longitudinal crack, rebar imprint at bottom Longitudinal crack approximately 3 inches Not for petrography, for verifying rebar corrosion Top 2-3/4-inch shafted.

Broken into two at 8 fiom bottom Cut into three sections Frill-depth longitudinal crack Full-depth longitudinal crack 6-inch long longitudinal crack Top 3-1/2-inch shafted.

Broken horizontally into two sections at 11-1/2 inches.

Cut into two sections 5-1/2-inch deep longitudinal crack, broken horizontally into three sections FP101034 Page 21 of 141 SBK00005902

WJE AI~,(:I II [ !:~,: I ~,

M,,\\! I:ltlAI f ~t It N I RHR mid CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 18 Table 2. Distress Features in DRI Measurement and Associated Weighting Factors Distress Code CCA CGCA CAD RCA CCP CGCP GAV Distress Feature Cracks in coarse aggregate Cracks and gel in coarse aggregate Coarse aggregate debonding Reaction rim around coarse aggregate Crack in cement paste Crack and gel in cement paste Air void with gel Weighting Factor 0.25 2.0 3.0 0.5 2.0 4.0 0.5 FP101034 Page 22 of 141 SBK00005903

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 19 Core ID Coarse aggregate Fine ag~egate Paste feature Residual cement Estimated w/c Estimated cement content Air void system Estimated air content (%)

Depth of carbonation (in.)

Surface coating thickness Cracking Crack feature Crack orientation Table 3. Summary of Findin [s of the Petrographic Examination for the Cores from Train Alpha 1 2 3 4 5 6 7 8 9 10 Crushed quartzite with a nominal maximum size of 3/4 inch, dark gray, angular, mostly hard and dense, and uniformly distributed.

Natural siliceous sand consisting of major amount of quartz and minor amount of feldspar, ~anite, and mica.

Gray, uniform, hard, dense, and had a semiconchoidal texture.

Minor amount, mostly ferrite phases, no supplementary cementitious materials 0.45 to 0.43 to 043 to 0.45 to 0.45 to 0.45 to 0.50 0.48 0.48 0.50 0.50 0.50 6 to 6-1/2 bags (564 to 611 pounds) per cubic yard Entrained 4-1/2 to 5-1/2 Entrained

3to6, highly variable 1/32 1/32 to 1/4 10 mils, tightly bonded Abundant micro-Through aggregate Random Entrained 6to 7 Up to 3 inches Up to 30 mils Severe Voids with ettringite 1/32 to 1/4 None One micro-Through aggegate Longitudi nal Marginal 3to4 Up to 100 mils None Voids clean 1/4 None One micro-Around aggregate Longitudi nal at surface 1/2 inch Marginal 3-1/2 to 4-1/2 None Voids clean 1/8 None One macro-Through aggregate Longitudi nal Marginal 3 to4, variable with clusters

<1/32 Up to 95 mils None Voids clean None One macro-Around aggregate Longitudi nal 18 Up to 95 mils None Most voids clean 10 mils, partially debonded One micro-Through aggegate Longitudi nal at surface 1/2 in.

0.45 to 0.45 to 0.45 to 0.45 to 0.43 to 0.50 0.50 0.50 0.50 0.48 Entrained 6to 8 1/32 None Micro-Entrained 4 to 6-1/2 Non-uniform Through aggregate Random 1/16 to 5/16 None Macro-Through ag~egate Longitudi hal Entrained 6-1/2 to 7-1/2 1/16 to 1/8 None Macro-Through aggregate Longitudi nal Crack len~h Full depth Full depth Full depth 11 inches Full depth Crack width

< 1 mil ASR Comment Up to 30 mils None Voids clean except for bottom portion Up to 30 mils None Voids clean Up to 5 mil Limited Voids clean Entrained Marginal 5 to 6 3 to 4 1/32

None, fi-actured None

None, fractured Both None Through aggregate Longitudi nal to random Up to 3-3/4 inches Up to 30 mils Moderate None Voids Voids with clean ettringite Up to 1-1/2 inches Up to 6 mils Minor Voids with ettringite 0

0 0

0

~0 0

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrogaphic Examination of Concrete Cores May 26, 2016 Page 20 Core ID Coarse aggregate Fine aggregate Paste feature Residual cement Estimated w/c Estimated cement content Air void system Estimated air content (%)

Depth of carbonation (in.)

Surface coating thic ~kness Cracking Crack feature Crack orientation Crack len~h Crack width ASR Comment Table 4. Summar~ of Findings of the Petrographic Examination for the Cores from Train Bravo 11 12 I 13 14 15 16 19 Crushed quartzite with a nominal maximum size of 3/4 inch, dark ~ray, angular, mostly hard and dense, and uniformly distributed.

Natural siliceous sand consisting of major amount of quartz and minor amount of feldspar, granite, and mica.

Gray, uniform, hard, dense, and had a semiconchoidal texture.

Minor amount, mostly ferrite phases, no supplementary cementitious materials 0.43 to 0.48 0.43 to 0.48 0.45 to 0.50 0.45 to 0.50 0.45 to 0.50 0.45 to 0.50 6 to 6-1/2 bags (564 to 611 pounds) ?er cubic yard 20 0.43 to 0.43 to 0.48 0.48 Marginal 3 to4 1/32 Multiple layers totaling 21 mils Abundant micro-Through aggregate Random 3-1/2 inches Up to 8 mils Severe Voids with ettringite Marginal 2-1/2 to 4 1/8, partially 10 mils, poorly bonded Abundant micro-Through aggregate Random Up to 3-1/2 inches Up to 9 mils Severe Voids with ettringite Entrained 3 to 5-1/2, variable

<1/32 10 mils, tightly bonded One macro-Through aggregate Longitudinal Full depth Up to 95 mils None Voids clean Marginal 3 to4 3/32 10 mils, poorly bonded One micro-Through aggregate Longitudinal Full depth Up to 95 mils None Voids clean Entrained 3-1/2 to 4-1/2

<1/32 7 mils, tightly bonded One Macro-Through aggregate Longitudinal Up to 5-5/8 inches Up to 30 mils None Voids clean Entrained 3-1/2 to 4-1/2 slightly variable Up to 1/4 partial 10 mils, tightly bonded One macro-And abundant micro-Through aggregate Longitudinal Random Up to 3 inches Up to 5 mils Moderate Voids with ettringite Entrained 4-1/2 to 5-1/2 1/8 to 1/4 10 mils, tightly bonded None None Voids mostly clean Entrained 4-1/2 to 5-1/2 1/8 10 mils, tightly bonded Both type of cracks Through aggregate Longitudinal to random Up to 5 inches for the V-crack, 1/2 for random cracks.

Up to 30 mils for the V-crack, 1 mil for the others Minor Voids with ettringite 0

0 0

0

~0 0

.aJ\\CI I! lliC[ ~

RttR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26. 2016 Page 21 Table 5. Summar i Results of DRI Measurement for Each Core Core ID 1

2 3

4 5

6 7

8 9

10 11 12 13 14 15 16 18 19 20 Cracked 3 5 1 4 2 2 4 2 3 4 4 3 5 0 2 4 3 3 7 CA Cracked 2 82 0 0 0 0 14 0 0 39 78 69 0 0 0 36 0 0 25 CA w/gel Reaction 2 7 0 0 1 1 9 3 1 9 3 9 1 1 0 10 5 1 9 Rim in CA Cracks in 1 33 54 4 42 25 14 20 78 46 7 20 55 29 16 21 11 0 18 paste Cracks w/gel in 9

265 0

0 0

0 43 0

0 115 260 277 0

0 0

126 0

0 47 paste Gel in void 0

8 0

0 0

0 3

0 0

4 6

5 0

0 0

8 0

0 1

Total 17 400 55 8

44 27 86 25 83 219 358 383 60 30 19 203 18 4

107 0

0 0

0

~0 0

O~

ENGI Nl.l:lkS AR~IIII [ECI S M&l I:I~,IAI S SCI liB! I I ~, I S RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 22 FIGURES

-.SOUTH WALL FIRE RATED ABOVE EL/-)26".O" Figure 1. Plan view of Equipment Vault at Elevation 10 ". Plan view taken fiom Fire Protection Drcnvings.

FP101034 Page 26 of 141 SBK00005907

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 23 Figure 2. As-received Core 6 showing the full-depth longitudinal crack (arrow).

Figure 3. As-received Core 13 showing the full-depth longitudinal crack (arrow).

FP101034 Page 27 of 141 SBK00005908

I!NGI NI:I:RS RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 24 Figure 4. As-received Core 10 showing a partial-depth crack (arrow).

Figure 5. As-received Core 16 showing the shifting of the core, FP101034 Page 28 of 141 SBK00005909

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 25 Figure 6. The four lapped sections of Core 1 with the top section at the top left and bottom section on the lower right, showing uniform distribution of aggregate particles.

FP101034 Page 29 of 141 SBK00005910

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 26 Figure 7a. Lapped section of Core 2 top portion showing the uniform distribution of aggregate particles and abundant microcraeks due to ASR (arrows).

FP101034 Page 30 of 141 SBK00005911

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 27 Figure 7b.. Lapped section of Core 2 middle portion showing the uniform distribution of aggregate particles and abundant microcraeks due to ASR (arrows).

FP101034 Page 31 of 141 SBK00005912

RHR mad CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 28 Figure 7c.. Lapped section of Core 2 bottom portion showing the uniform distribution of agg~egate particles and abundant microcracks due to ASR FP101034 Page 32 of 141 SBK00005913

li N G I N 1: [i ARCI II ]-I!C RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 29 Figure 8. Lapped section of Core 3 showing the uniform distribution of aggtegate particles and the full-depth cracks.

FP101034 Page 33 of 141 SBK00005914

WJE A R(.]I I II"I!Lil S RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 30 Figure 9. Lapped section of Core 4 showing the uniform disttibution of aggregate particles.

FP101034 Page 34 of 141 SBK00005915

A P,(.;I I l I It(.] 1%

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 31 Figure 10. Lapped sections of Core 5 showing the uniform distribution of aggregate particles and a full-depth longitudinal crack, The top portion is on the left.

FP101034 Page 35 of 141 SBK00005916

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 32 Figure 11. Lapped sections of Core 6 showing the uniform disOibution of aggregate particles and the fitll-depth longitudinal crack. Top portion is on the left.

FP101034 Page 36 of 141 SBK00005917

ARCI I I1"1:C 1 S MAI I:RIA[S gCII:N IlhlS RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 33 Figure 12. Lapped sections of Core 7 showing the uniform dist~ibution of aggregate particles. The top portion is at the top left and the bottom portion is at the bottom left.

FP101034 Page 37 of 141 SBK00005918

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 34 Figure 13. Lapped Seetion of Core 8 showing the uniform dist~ibution of aggregate particles. Also note the longitudinal cracks in the two top portions (arrows).

FP101034 Page 38 of 141 SBK00005919

RHR mad CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 35 Figure 14. Lapped section of Core 9 showing the uniform disoibution of aggregate particles and the longitudinal cracks (arrow).

FP101034 Page 39 of 141 SBK00005920

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 36 Figure 15a. Lapped section of the top portion of Core 10 showing the uniform distribution of aggregate and cracks due to ASR (arrow).

FP101034 Page 40 of 141 SBK00005921

WJE IiNG I N I:ERS AP, CI I I FE{£TS

~All I:P.IA[ S SCIEN I 1~, I S RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exanaination of Concrete Cores May 26, 2016 Page 37 Figttre 15b. Lapped section of the middle portion of Core 10 showing the zmiform distribzttion of aggregate and cracks due to ASR (arrow).

FP101034 Page 41 of 141 SBK00005922

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exanfination of Concrete Cores May 26, 2016 Page 38 Figure 15e. Lapped section of the bottom portion of Core 10,

showing the uniform distribution of aggregate and cracks due to ASR (arrow).

FP101034 Page 42 of 141 SBK00005923

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examhlation of Concrete Cores May 26, 2O 16 Page 39 Figure 16. Lapped sections of Core 11 showing the uniform distribution of aggregate particles. The top portion is at the top left and the bottom portion at bottom right.

FP101034 Page 43 of 141 SBK00005924

RHR and CS Equipment Vault at NextEra Euergy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 40 Figure 17a. Lapped section of the top portion of Core 12 showing the uniform distribution oJ aggregate and cracks due to ASR (arrows).

FP101034 Page 44 of 141 SBK00005925

RHR aud CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 41 Figztre 17b. Lapped section of the middle portion of Core 12 showing the ztniform distribution of aggregate and cracks due to ASR (arrows).

FP101034 Page 45 of 141 SBK00005926

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 42 Figure 17c. Lapped section of the bottom portion of Core 12 showing the uniform distribution of agg~egate and cracks due to ASR (arrows).

FP101034 Page 46 of 141 SBK00005927

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 43 Figure 18. Lapped sections of Core 13 showing the uniform distribution of agg~egate pctrticles and the fidl-depth longitudinal cracks. Top portion is on the left.

FP101034 Page 47 of 141 SBK00005928

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2O 16 Page 44 Figure 19. Lapped section of Core 14 showing the uniform distribution of aggtegate particles and the full-depth longitudinal cladk.

FP101034 Page 48 of 141 SBK00005929

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 45 Figure 20. Lapped sections of Core 15 showing the uniform distribution of agg~egate p~ticles and a longitudinal crack in the top portion of the core (arrows).

FP101034 Page 49 of 141 SBK00005930

~ NGINI2t£RS ARCI I I II~C1 S MAI I:I{IA[S SCIIN IIS I S RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 46 Figure 21. Lapped sections of Core 16 showing the uniform distribution of aggregate particles. Note the top portion of the core location was shafted.

FP101034 Page 50 of 141 SBK00005931

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 47 Figure 22. Lapped section of Core 18 showing the ztniform distribzttion of aggregate particles. The top szttface of the core was f~actured FP101034 Page 51 of 141 SBK00005932

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 48 Figure 23. Lapped sections of Core 19 showing the uniform distribution of aggregate particles.

FP101034 Page 52 of 141 SBK00005933

WJE RHR and CS Equipment Vault at NextEra Euergy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 49 Figure 24. Lapped sections of Core 20 showing the uniform distribution of aggregate particles.

FP101034 Page 53 of 141 SBK00005934

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 50 Figure 25. A f!actured sulface of a quartzite in Core 12 BC, showing the granular texture.

Figure 26. Lapped section of Core 4 showing low air content.

FP101034 Page 54 of 141 SBK00005935

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 51 Figure 27. Lapped section of Core 3 showing relatively high air content. Note that most voids were free of secondaty deposits.

Figure 28. Lapped section of Core 6 AB (left) and Core 6 BC O"ighO showing significantly different air content of the two sections of the core.

FP101034 Page 55 of 141 SBK00005936

RHR and CS Equipmeut Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 52 Figure 29. Lapped section of Core 2 BC showing ettringite deposits in air voids (arrows).

Figure 30. Lapped section of Core l lDE showing secondary etOingite in an air void FP101034 Page 56 of 141 SBK00005937

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 53 Figure 31. Lapped section of Core 1 AB showing a longitudinal crack terminating at approximately 1/2 inch fiom the top sutfaee (arro~O.

FP101034 Page 57 of 141 SBK00005938

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 54 Figure 32. Reaction rim in a coarse aggtegate in Core 1 BC.

Figure 33. Lapped section of Core 1 CD showing a crack with gel extendingfiom aggregate to paste (arrow).

FP101034 Page 58 of 141 SBK00005939

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 55 Figure 34. Lapped section of Core 2AB showing a longitudinal crack without secondaty deposits.

Figure 35. Lapped section of Core 2 AB showing a coarse aggregate particle with reaction rim.

FP101034 Page 59 of 141 SBK00005940

IN{ IINI.I:RS ARCI II IF~)) S RHR aud CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 56 Figure 36. Lapped section of Core 2 BC showing cracks partially filled with gel extending into the paste (arrows).

Figure 37. Lapped section of Core 2 BC showing a cracked coarse aggregate with no geljTlling the cracks.

FP101034 Page 60 of 141 SBK00005941

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 57 Figure 38. Lapped section of Core 2 AB showing gel filled cracks extendingfiom aggregate particle on the left into the paste (arrows).

Figure 39. Lapped section of Core 2 BC showing a gel-filled crack extending f!om a coarse aggregate pcwticle on the right into the paste (arrouO.

FP101034 Page 61 of 141 SBK00005942

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 58 Figure 40. Lapped section of Core 2 CD showing multiple cracks filled with gel extendingfiom a coarse aggregate particle on the left into the paste (arrows).

Figure 41. A fractured sutfaee along a crack in Core 2 AB showing abundant white gel deposit.

FP101034 Page 62 of 141 SBK00005943

RHR mid CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 59 Figure 42. A fiactured su#face along a crack in Core 2 BC showing abundant white gel deposit.

Figure 43. Lapped section of Core 2 CD showing a craek filled with gel in the paste (arrow).

FP101034 Page 63 of 141 SBK00005944

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 60 Figure 44. Lapped section of Core 2 AB showing an entrapped air void filled with white gel Figztre 45. Lapped section of Core 2 CD showing an enOapped void

/~lled with clear gel.

FP101034 Page 64 of 141 SBK00005945

WJE liNG 1NI.IiI~,S ARCI I I 1-l!C[ S

~AAI I:IUAI.S SCII!N 1"15 I~

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 61 Figure 46. Lapped section of Core 2 AB showing a reactive aggregate particle with both reaction rim and cracking.

Figure 47. Lapped section of Core 2 AB showing branched crack in the paste (arrows).

FP101034 Page 65 of 141 SBK00005946

WJE RHR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 62 Figure 48. Lapped section of Core 2 AB showingfiesh and clear gel l~orms in a crack with an aggtegate particle (arrouO.

Figure 49. A jS"aetured smface of Core 2 CD showing an air void coated with ettringite (bhte arro~O and ASR gel Oed arro~,~O next to another void coated with gel.

FP101034 Page 66 of 141 SBK00005947

I:Nt;INI tiRS ARCI I I I[:C 1:4 RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 63 Figure 50. Lapped section of Core 3 showing the branch out of the longitudinal crack. Some areas of the crack are f!lled with clear epoxy (arrows).

Figure 51. Lapped section of Core 4 showing the longitudinal crack (a row).

FP101034 Page 67 of 141 SBK00005948

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 64 Figure 52. Lapped section of Core 7 AB showing a reactive aggregate particle with reaction rim.

Figure 53. Lapped section of Core 7 BC showing a gel-filled crack extending out fiom a reactive aggregate particle on the right (arro.O, FP101034 Page 68 of 141 SBK00005949

M,.\\I I:I~.[AI ~, SCII f\\! I1~ I k RHR aqd CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination o f Concrete Cores May 26, 2016 Page 65 Figure 54. Lapped section of Core 7 BC showing a gel-filled crack linking two reactive particles (arrows).

Figure 55. A fiactured swface of Core 7 BC showing a white gel-filled air void (arro,~O.

FP101034 Page 69 of 141 SBK00005950

WJEI RHR and CS Equipment Vault at NextEra Euergy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 66 Figure 56. Lapped section of Core 8 CD showing the termination of the longitudinal crack (arrows),

Figure 57. Lapped section of Core 8 AB showing branch out of the longitudinal crack (arrow).

FP101034 Page 70 of 141 SBK00005951

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 67 Figure 58. Lapped section of Core 9 showing branch out of the longitudinal crack (arrows).

Figure 59. Lapped section of Core 10 AB showing the interaction of the longitudinal crack and a cracked reactive agg~egate particle with multiple cracks (arroyO.

FP101034 Page 71 of 141 SBK00005952

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 68 Figure 60. Lapped section of Core 10 AB showing a coarse aggregate particle with reaction rim and cracking into paste (a,,ow).

Figure 61. Lapped section of Core 10 BC showing an internal crack in a reactive aggregate partially filled with white gel.

FP101034 Page 72 of 141 SBK00005953

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 69 Figme 62. Lapped of Core 10 CD showing two gel-filled cracks linking two reparative agg~egate particles (arrow).

Figure 63. Lapped section of Core 10 CD showing multiple crack filled with gel extending out fiom an aggregate particle in to the paste (arrows). Also note a gel-filled air void (blue arro~O.

FP101034 Page 73 of 141 SBK00005954

RHR and CS Equiplnent Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 70 Figure 64. Lapped section of Core 10 CD showing gel-filled air voids.

Figure 65. A lapped section of Core 10 AB showing a ball of clear gel formed on the lapped surface of the core (arro~,~O.

FP101034 Page 74 of 141 SBK00005955

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 71 Figure 66. Lapped section of Core 10 AB showing ettringite-coated air voids (arrows).

Figure 67. A fiactured smfaee of Core 10 BC showing air voids coated with etOingite (blue arrows) and alkali-silica gel Oed arro~O.

FP101034 Page 75 of 141 SBK00005956

MAI I:IUA! g SCI[:N IIS I fi RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2O 16 Page 72 Figure 68. A f!actured sutface of Core 10 BC showing a gel-covered void that was likely coated with ethingite previously (arrow).

Figure 69. Lapped section of Core 10 BC showing ettringite deposit in a crack (arrow).

FP101034 Page 76 of 141 SBK00005957

kL,\\! I:l,~],,\\l ~ ~(.]1 I h! IlY, ! ~

RHR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 73 Figure 70. Lapped section of Core 11 AB showing the poorly bonded multiple layers of paint coats. Six individual layers could be identiJied.

Figure 71. A fiactured sutface of Core 11 BC showing a reactive coarse aggregate with reaction rim and white gel deposit.

FP101034 Page 77 of 141 SBK00005958

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 74 Figure 72. A fiactured swfaee of Core 11 BC showing abundant gel deposit between two reactive aggregate particles.

Figure 73. A f!actured surface of Core 11 AB showing a craek filled with gel leading into a void coated with gel (arrows).

FP101034 Page 78 of 141 SBK00005959

WlEI RHR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 75 Figure 74. A lapped section of Core 11 BC showing a gel-filled crack through a non-reactive quaTtz particle (arrortO.

Figure 75. A lapped section of Core 11 CD showing a gel-filled crack extendingf!om a reactive agg~egate on the right into the paste FP101034 Page 79 of 141 SBK00005960

AIU, :1 [ I It(]

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 76 Figure 76. Lapped section of Core 12 CD showing a crack filled with gel extendingfiom a reactive aggregate on the left into the paste (arrow).

Figure 77. Lapped section of Core 12 CD showing a gel-filled crack linking to two reactive agg~egate particles (arrows).

FP101034 Page 80 of 141 SBK00005961

RHR and CS Equipment Vault at NextEra Energy Seablook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 77 Figure 78. Lapped section of Core 12 BC showing a reactive aggregate particle with narrow reaction rim and abundant internal cracks, some of which extended into the paste (arrows).

Figure 79. Lapped section of Core 12 CD showing a cracked reactive aggtegate particle with cracks extending into the paste FP101034 Page 81 of 141 SBK00005962

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 78 Figure 80. Lapped section of Core 12 CD showing two air voids qlled with white gel and connected with a crack (arrows).

Figure 81. Lapped section of Core 12 AB showing multiple cracks extending out J~om a reactive agg~egate on the right (arrows).

FP101034 Page 82 of 141 SBK00005963

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 79 Figure 82. Lapped section of Core 12 AB showing a gel-filled crack extendingfiom a reactive aggregate particle on the bottom to the top surface of the core (arrows).

FP101034 Page 83 of 141 SBK00005964

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 80 Figure 83. A fiactured surface along a longitudinal crack at 1/4 inch fiom the top surface of Core 12 AB showing abundant white gel deposits.

Figure 84. Lapped section of Core 13AB showing branching out of the longitudinal crack. Note the epoxy in the cracks (arrows).

FP101034 Page 84 of 141 SBK00005965

WJEI I!NGINLIsRS A P,{ ]t I t1"1!C1 S MAI I:I{IA[ ~ StII~N IIS IS RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 81 Figure 85. Lapped section of Core 16 BC showing cracks filled with gel extending)5"om a reactive aggregate on the right into the paste (a rows).

Figure 86. Lapped section of Core 16 CD showing a gel-filled crack extendingf!om a reactive aggvegate particle on the left into the paste Oed arrow). Also note an air void eoatedwith ettringite (blue FP101034 Page 85 of 141 SBK00005966

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 82 Figure 87. Lapped section of Core 16 BC showing multiple voids filled or coated with alkali-silica gel (arrows).

Figure 88. Lapped section of Core 19 AB showing the intact smface coating (arrow).

FP101034 Page 86 of 141 SBK00005967

RHR ~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 83 Figure 89. Lapped section of Core 20 AB showing branching out of the longitudinal crack (arro~O.

Figure 90. Lapped section of Core 20 BC showing a gel-coated air void next to a reactive aggregate with reaction rim (arrow).

FP101034 Page 87 of 141 SBK00005968

I b-.t ;INI I: I.,:~

RHR and CS Equipment Vault at NextEra Euergy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 84 Figure 91. Lapped section of Core 20 DE showing a gel-filled crack extending out f!om a reactive aggregate on the right into the paste (anow).

Figure 92. Lapped section of Core 20 DE showing a gel-filled crack extending out fom one reactive aggregate to cmother (arrows FP101034 Page 88 of 141 SBK00005969

AI~.~:I II I1{(] 1"~

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 85 Figure 93. Lapped section of Core 20 DE showing a void with calcium hydroxide deposit (red arrow) on the bottom and ettringite on top (blue arro~O.

FP101034 Page 89 of 141 SBK00005970

WJEI ENGINEI:RS AR(:I I iIEC I S M,,\\I I:KIA[S St21 I:N I1 S I ~

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 86 Core 20 Core 19 Core 18 Core 16 Core 15 Core 14 Core 13 Core 12 Core 11 Core 10 Core 9 Core 8 Core 7 Core 6 Core 5 Core 4 Core 3 Core 2 Core 1 0

50 100 150 200 250 300 Damage Rating Index 350 400

- Cracked CA

- Cracked CA w/gel Reaction Rim in CA

- Cracks in paste Cracks w/gel in paste Gel in void Figure 94. Diagram showing the DRI tneasurement for all cores.

Top Middle Top Middle Bottom Bottom

- Cracked CA (CCA)

[] Cracked CA w/gel (CGCA)

- Reaction rim in CA(RCA)

[] Cracks in paste (CCP)

[] Cracks w/gel in paste (CGCP)

Gel in void (GAV) 0 10 20 30 40 50 Damage Rating Index Figure 95. Diag,am showing the comparison of DRI measurement of different sections for Core 1.

FP101034 Page 90 of 141 SBK00005971

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exanaination of Concrete Cores May 26, 2016 Page 87 Top Middle Bottom 0

50 100 150 200 250 300 350 400 450 500 550 600

[] Cracked CA (CCA)

- Cracked CA w/gel (CGCA)

[] Reaction rim in CA(RCA)

[] Cracks in paste (CCP)

Cracks w/gel in paste (CGCP)

Gel in void (GAV)

Damage Rating Index Figure 96. Diagram showing the comparison of DRI measurement of different sections for Core 2.

Top Middle Bottom

[] Cracked CA (CCA) m Cracked CA w/gel (CGCA)

[] Reaction rim in CA(RCA)

[] Cracks in paste (CCP)

[] Cracks w/gel in paste (CGCP)

~. Gel in void (GAV) 0 20 40 60 80 100 120 140 Damage Rating Index Figure 97. Diag,am showing the comparison of DRI measurement of different sections for Core 7.

FP101034 Page 91 of 141 SBK00005972

AR(it I ITI!CI S RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 88 Top Middle Bottom

- Cracked CA (CCA)

- Cracked CA w/gel (CGCA)

- Reaction rim in CA(RCA)

- Cracks in paste (CCP)

- Cracks w/gel in paste (CGCP)

_~ Gel in void (GAV) 50 100 150 200 250 300 Damage Rating Index Figure 98. Diagram showing the comparison of DRl measurement of different sections for Core 10.

Top Vliddle Top Middle Bottom Bottom

- Cracked CA (CCA)

- Cracked CA w/gel (CGCA)

- Reaction rim in CA(RCA)

- Cracks in paste (CCP)

- Cracks w/gel in paste (CGCP)

Gel in void (GAV) 0 S0 100 150 200 250 300 350 400 450 Damage Rating Index Figure 99. DiagJam showing the comparison of DRI measurement of different sections for Core 11.

FP101034 Page 92 of 141 SBK00005973

I£NGIN LI:RS ARCI I II[.C l S MAI I:KIAI S S{£1 I!N IIS IS RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exanfination of Concrete Cores May 26, 2016 Page 89 Top Middle Bottom

- Cracked CA (CCA)

- Cracked CA w/gel (CGCA)

- Reaction rim in CA(RCA)

- Cracks in paste (CCP)

- Cracks w/gel in paste (CGCP)

Gel in void (GAV) 0 50 100 150 200 250 300 350 400 Damage Rating Index Figure 100. Diagvam showing the comparison of DRl measmement of different sections for Core 12.

- Cracked CA (CCA)

Top

[] Cracked CA w/gel (CGCA)

- Reaction rim in Middle CA(RCA)

[] Cracks in paste (CCP)

Bottom - Cracks w/gel in paste (CGCP)

~] Gel in void (GAV) 0 50 100 150 200 250 300 350 Damage Rating Index Figure 101. Diag.am showing the comparison of DRI measurement of different sections for Core 16.

FP101034 Page 93 of 141 SBK00005974

k,AI I:IUAI S SCII:~,~ Ilh 1 ~

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 90 Top Middle Top Middle Bottom Bottom 0

50 100 150 200

[] Cracked CA (CCA)

I~ Cracked CA w/gel (CGCA)

- Reaction rim in CA(RCA)

- Cracks in paste (CCP)

Cracks w/gel in paste (CGCP)

Gel in void (GAV)

Damage Rating Index Figure 102. Diag.am showing the comparison of DRI measurement of different sections for Core 20.

FP101034 Page 94 of 141 SBK00005975

RHR m~d CS Equipment Vault at NextEra Energy Seabrook Statiou Petrographic Examination o1-" Concrete Cores May 26, 2016 Page 91 APPENDIX - ORIGINAL PETROGRAPHIC DATA SHEETS FP101034 Page 95 of 141 SBK00005976

I NCANI I:1~

AR~I]I[ I[~C 1 ~

RtLR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 92 Date 03/29/2016 Sample I.D. # 1 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: Paint Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial deptb [] Length: 1/2 in. Width: 1 mil Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: possible ASR Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Colin: brown[] gray-buft~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] ] Bonding: tight [] fair [] poor []

Fractured surface around a~g. [] Through a~g. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft~ soft [] uniform [] gradual change [] variable on a microscale []

Texture of flesh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] ] yes [] ]thickness:

harder [] softer []

darker l-I lighter[]

Alite [] belite [] ferrite []

Estimated volume:

up to 10 % of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] string~ []

Estimated volume:

1

% of paste advanced []

normal []

poor []

Built w/cm: 0.45-- 0.50 retempering: yes [] no []

w/era near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/32" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-1/2-- 5-1/2%

Coarse [] fineNl spherical [] irregular [] bleed channels [] water gains [] unifurm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)z [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR detected, voids clean Photograph: yes [] no []

Photo: Lapped [] flactured [] thin section [] Otber [] caption:

FP101034 Page 96 of 141 SBK00005977

WlEi RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 93 Date 03/29/2016 Sample I.D. # 1 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: Paint SteeD: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder ffl Chunk [] Size: DXL 4 X 5-1/2 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1/2 in. Width:

Plastic shrinkage[] Early d~3,ing stu-inkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect 1 mil Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Colin: brown[] gray[] bufflZl Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] [ Grading: well [] poor [] gap [] [ Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dmk gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[~ soft [] uniform [] gradual change [] variable on a microscale []

Texture of flesh flacture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] thickness:

harder [] softer []

darker[-1 lighter[]

Alite [] belite [] ferrite []

Estimated volume:

up to 10 % of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] Typell/V[] TypellI[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

w/c~n near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy

[ SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-- 5%

Coarse [] fineU1 spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR detected, voids clean Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 97 of 141 SBK00005978

WJE I Nt~IN[ l:Rq RHR and CS Equipmeot Vault at NextEra Eoergy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 94 Date 03/29/2016 Sample I.D. # 1 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: Paint Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

[ Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Tluough agg [] Pmtial depth [] Length: 1/2 in. Width:

Plastic shrinkage[] Early drying sbainkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect 1 rail Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcwstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angulm" [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around a~g. [] Through ag~. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[~ moderately hard[-] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fiesh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcimn Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] I thiclmess:

harder [] softer []

darker I-1 lighter []

Alite [] belite [] fenite []

Estbnated volume:

up to 10 % of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] Typell/V[] TypelII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Built w/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm neat" top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

] Cementitious Materials 6 -- 6-1/2 bags/cy

] SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] uon-entrained

[]

air content: 4-- 5%

Coarse [] fine[] spherical [] irregulm" [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)._ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] FFF [] Other:

No ASR detected, voids clean Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 98 of 141 SBK00005979

AItCI I[llt;l~

RHR mid CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 95 Date 03/29/2016 Salnple I.D.

1. 1 CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: Paint Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 3-5/8 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1/2 in. Width: 1 nail Plastic shrinka gel-1 Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: possible ASR Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buffl~ Shape: angular[] subangular [] subroundedl-I rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angular [] subangular [] suhrounded[] rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface aiound a~g. []

Through agg. []

Fibers: no [] yes [] dialneter:

mils width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardNl moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a rnicroscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] I thiclaless:

harder [] softer []

darker[] lighter[-]

Alite [] belite [] ferrite []

Estimated volume:

up to 10 % of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeIIiV[] TypeIII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

w/era near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4 -- 5%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unilbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)a [] Other [] thin coat [] thick coat [] full [] somel-1 most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sultate attack [] FIT [] Other:

Isolated ASR.

Photograph: yes [] no []

Photo: Lapped [] flactured [] thin section [] Other [] caption:

FP101034 Page 99 of 141 SBK00005980

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 96 Date 03/29/2016 Sample I.D. # 1 DE Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: Paint Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder" [] Chunk [] Size: DXL 4 X 5-1/2 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1/2 in. Width: 1 nail Plastic shrinkageU1 Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: possible ASR Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[Z] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around ag~. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hardl-I moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Textme of flesh fracture surfaces:

no N]I yes []

Alite []

angular Calcium Hydroxide:

Hydration:

subconchoidal []

semiconchoidal [] finely granular []

thickness:

harder [] softer []

darker" [] lighter []

belite [] ferrite []

Estimated volume:

up to 10 % of paste

[]

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIlI[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher" fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-- 5%

Coarse [] fine[] spherical [] inegular [] bleed channels [] water gains [] unifurm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Isolated ASR Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 100 of 141 SBK00005981

RHR and CS Equipment Vault at NextEra Energy Seablook Station Petrog,aphic Examination of Concrete Cores May 26, 2016 Page 97 Date 03/25/2016 Sample I.D. # 2 AB Finishing: brooln [] trowel []

tine [] formed [] cut []

coating [] other: Paint Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-3/8" T0pi intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Throughagg [] Partial depth [] Length: 3 in. Width: up to 1/32" Plastic slminkage[] Early d~Ting shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: possible ASR Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microc~Tstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] bufI~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around ag~. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of flesh fiacture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] I thickness:

barder [] softer []

darker[] lighter[]

Alite [] belite [] fenire []

Estimated volume:

up to 10 % of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size: p,m Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w]cm: 0.43 -- 0.48 Carbonation depth:

Top:

Estimated Paste:

Fly ash: [] --

entrained []

Coarse [] fine-voids: clean []

retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

1/32-1/4" bottom:

Crusher fines: No [] Yes [] :

25 to 27 % ] Cementitious Materials 6 -- 6-1/2 bags/cy ] SCM: no [] yes []

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System marginal [] non-entrained

[]

air content: 3-1/2-4-1/2%

spherical [] irregular [] bleed channels [] water gains [] uniform [] clusters [] around CA []

2nd deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] FiT [] Other:

Severe ASR. Air not uniform.

Surface sluinkage crack 3/8" deep, vertical.

White paint 10 nails thick.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 101 of 141 SBK00005982

RHR m~d CS Equip~nent Vault at NextEra Energy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 98 Date 03/24/2016 Sample I.D. # 2 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6-7/8" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3 in. Width: 0.152ram Plastic shrinkage[] Early d~2cing stuinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] grayNl buff[] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hardl-I moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated ce~nent particles:

Texture of fresh fracture surfaces:

no ~I Calcium Hydroxide:

Hydration:

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker [] lighter U1 Alite []

belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.43 -- 0.48 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 5-6%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sultiate attack [] F/T [] Other:

Moderate to severe ASR.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 102 of 141 SBK00005983

RIIR and CS Equiplnent Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 99 Date 03/24/2016 Sample I.D. # 2 CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/4" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Pmtial depth [] Length: 2-112 in. Width:

Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect 0.13mm Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: mica

% natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through ag~. []

Fibers: no [] yes [] diameter: nails width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no ~1 Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal []

semiconchoidal [] finely granular []

yes [] I thickness:

harder [] softer []

darker[] lighter[]

Mite [] belite [] ferrite []

Estimated volume:

~5% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypelII[] White[] Other[]

p.m Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.43-- 0.48 retempering: yes [] no []

w/era near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy

] SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

~narginal []

non-entrained

[]

air content: 5-6 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2rid deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] F/T [] Other:

Severe ASR. Gel in cracks in CA, in paste, and voids Ettringite also in some voids. No DEF.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 103 of 141 SBK00005984

RHR and CS Equiplnent Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 100 Date 03/24/2016 Sample I.D. # 3 Finishing: broom [] tro~vel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL Top: intact [] delaminated [] scaled []

eroded severely [] eroded slightly []

popout [] other:

Cover depth:

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: in. Width:

Plastic shrinkage[] Early drying sba-inkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Made by: DXC 4X 3-3/4" Bottom: rough [] formed []

cm [] fiat [] fractured []

barrier [] other:

I Corrosion: no [] moderate [] severe []

2.5mm Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] bufll:] Shape: angular-subangular [] subroundedl-I rounded []

Fine manufactured []

Major: limestone [] quartz[] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] [ Grading: well [] poor [] gap [] I Bonding: tight [] fail [] pool" []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fiesh fiacture surfaces:

no []1 Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

I subconchoidal []

semiconchoidal [] finely granular []

yes [] I thickness:

harder [] softer []

darker[] lighter[]

Alite [] belite [] ferrite []

Estimated volume:

~5% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypeIII[] White[] Other[]

gm Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

pOOl" []

Bulkw/cm: 0.43--0.48 retempering:yes []no []

w/cm near top l-l or bottom []: 0. --0.

same[]

Carbonation depth: Top: 1/32-1/4" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] nou-entraiued

[]

air content: 6-7 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unifurm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)a [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] FFF [] Other:

Cracks branch out at 1-1/4" fiom top surface. No ASR Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 104 of 141 SBK00005985

WJE RHR and CS Equipmeut Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 101 Date 03/28/2016 Sample I.D. # 4 Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4-3/4" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1/2 in. Width:

Plastic shrinkage[] Early dtTing shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect

<lmils Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microc~3,stalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brownU1 gray[] bufllZI Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded-rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardN] moderately hard[] moderately soft[Z] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

yes [] I thickness:

harder [] softer []

darker[] lighter I-1 Alite [] belite [] ferrite []

Estimated volume:

~5% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

pm Conteut: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

~v/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/4" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste:

25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-4 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] smnel-I most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR. Voids clean.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 105 of 141 SBK00005986

WlEI AR~]Ill 11 CI I RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 102 Date 03/25/2016 Sample I.D. # 5 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: Width: 1/16" Plastic shrinkage[] Early drying stuinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcwstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray-buff[Z] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fresh fracture surfaces:

no ~I Calcium Hydroxide:

H~dration:

Size:

Shape: tabular []

subconchoidal [] semiconchoidal [] finely granular []

yes [] ] thickness:

harder [] softer []

darker[] lighter[]

Alite [] belite [] ferrite []

Estimated volume:

~15% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypellI[] White[] Other[]

btm Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

xv/cm near top [] o1" bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/8" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

~narginal [] non-entrained

[]

air content: 3-112-4-1/2 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)._ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR. Voids very clean. Full-depth crack shrinkage or ASR in other places.

Plmtograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 106 of 141 SBK00005987

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 103 Date 03/25/2016 Sample I.D. # 5 BC Finishing: broom [] tro~vel []

tine [] formed [] cut []

coating [] other: Fractured Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 7-3/4 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] flactured []

popout [] other:

barrier [] other:

Cover depth:

] Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Pmtial depth [] Length: Width: 3/32" Plastic shrinkage[] Early d@ng shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microc~Tstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brownU1 gray[] buff[] Shape: angularN] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand [] Shape: angulm [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] [ Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through ag~. []

Fibers: no [] yes [] diameter: nails width: in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated ce~nent particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] ] yes []

thickness:

harder [] soft.er []

darker[] lighter[]

Alite []

belite [] ferrite []

Estimated volume:

~15% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/em: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste:

25 to 27 %

I Cementitious Materials 6 -- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

~narginal [] non-entrained

[]

air content: 3-1/2-4-1/2 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] ~vater gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)a [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] FFF [] Other:

No ASR. Full-depth crack due to ASR in other places or shrinkage.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 107 of 141 SBK00005988

WJE

~d..\\l l:l.,Ii:I S ~( II:,! II~ IS RHR and CS Equiplnent Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 104 Date 03/28/2016 Sample I.D. # 6 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder[] Chunk [] Size: DXL 4 X 7-3/4 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: Width: 3132" Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microclTstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] bufiq~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: nails width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fiesh fracture surfaces:

Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

I subconchoidal []

semiconchoidal [] finely granular []

yes [] I thickness:

harder [] softer []

darker I-1 lighter l-I Alite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIlI[] White[] Other[]

gm Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/c~n near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: <1/32" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

] Cementitious Materials 5-1/2-- 6 bags/cy

] SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void Syste~n entrained []

margiual [] non-entrained

[]

air content: 3-4 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unilbrm [] clusters [] around CA []

voids: clean []

2rid deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Inforlnalion Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] FIT [] Other:

Most voids clean. No ASR detected.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 108 of 141 SBK00005989

WJE AR( ]I t[ tICI ~

RHR and CS Equipmeut Vault at NextEra Euergy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 105 Date 03/28/2016 Sample I.D. # 6 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: Fractured Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

baMer [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

CraeMng: None[] Micro [] Horizontal [-] Around agg [] Full depth [] Random[] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: Width: 3/32" Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angularN] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular[] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractmed surface around agg. [] Through agg. []

Fibers: no [] yes [] dimneter: mils ~vidtb:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fresh fracture surfaces:

Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

I subconchoidal []

semiconchoidal [] finely granulm" []

yes [] I thielcness:

hmder [] softer []

darker[] lighter[]

Mite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

1. m Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste:

25 to 27 %

I Cementitious Materials 5-1/2-- 6 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-4 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2rid deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] FIT [] Other:

No ASR detected. Weak rim detected in one CA.

Crack full depth, not narrowing with depth.

Poorly mixed due to air clusters.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 109 of 141 SBK00005990

,\\IAi I:I:,tA[ ~ 5i.]11 ?,i Il ~ [ ~,

RHR and CS Equip~nent Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 106 Date 03/30/2016 Sample I.D. # 7AB Finishiug: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2 Top: intact [] delalninated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Cmrosion: no [] inoderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1/2 in Width:

Plastic shrinkage[] Early drying stuinkage [] Later drying stu-inkage [] thermal [] Crazing [] Other: ASR Other defect

] rail Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angular-subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] qual~z [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded-rounded []

Distribution: uniform [] segregated [] Grading: well [] pool" [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around ag~. [] Through agg. []

Fibers: no [] yes [] diameter: nails width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fiesh fiacture surfaces:

no -l Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal []

semiconchoidal [] finely granular []

yes [] I thickness:

harder [] softer []

darker[] lighter I-1 Alite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypeIII[] White[] Other[]

pm Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

norlnal []

pool" []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbouation depth: Top: 1/32" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal []

non-entrained

[]

air" content: 6-7 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unifurm [] clusters [] around CA []

voids: dean []

2nd deposits [] ettringite [] Ca(OH)._ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Limited ASR. Isolated.

One void filled with gel. Most void coated with very thin layer of ettringite.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 110 of 141 SBK00005991

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exanfination of Concrete Co,es May 26, 2016 Page 107 Date 03/30/2016 Sample I.D. # 7 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Pro,ieet No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

bahlet [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

CracMng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1-1/2 in Width:

Plastic shrinkageVl Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect 0.147ram Aggregate Coarse NMS:

Gravel []

Ma~jor: limestone [] quartzite [] granite [] che~t [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angular[] subangular [] subroundedl-I rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] ] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through a~. []

Fibers: no [] yes [] diameter: nails width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fresh fracture surfaces:

no ~I Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker I-1 lighter []

Alite []

belite [] fenite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypelII[] White[] Other[]

pin Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

] Cementitious Materials 6-- 6-1/2 bags/cy

] SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

~narginal [] non-entrained

[]

air content: 7-8 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] uniform [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

Some ASR. Not severe.

ASR [] DEF [] Sulfate attack [] FIT [] Other:

Some voids contain ettringite.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 111 of 141 SBK00005992

WJE I: i(!,INt. I!R5 RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examhmtion of Concrete Cores May 26, 2016 Page 108 Date 03/30/2016 Sample I.D. # 7CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6 Top: intact [] delaminated [] scaled []

Bottom: rough [] furmed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

ban-let [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1-1/2 Width: 0.147mm Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microm3,stalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Colin: brown[] gray[] buft~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribntion: uniform [] segregated [] Grading: well [] poor [] gap [] [ Bonding: tight [] fail" [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardN] moderately hard[] moderately sofW1 soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no []1 Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal []

semiconchoidal [] finely granular []

yes [] I thickness:

harder [] softer []

darker[] lighter I-1 Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

w/era near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 to 27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void S~¢stem entrained []

marginal [] non-entrained

[]

air content: 7-8 %

Coarse [] fineNl spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No photos due to poor lapping.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 112 of 141 SBK00005993

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 109 Date 03/29/2016 Sample I.D. # 8AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: Width: 1/64" Plastic shrinkagel-I Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buft~ Shape: angularN] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no []l Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal []

semiconchoidal [] finely granular []

yes [] ] thickness:

harder [] softer []

darker l-I lighter I-1 Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] Type Ill[] White[] Other[]

Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk xv/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/16-5/16" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27% %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly asia: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained []

air content: 5-1/2-6-1/2 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulthte attack [] F/T [] Other:

No ASR. Crack due to other causes.

Crack branch out, shifted.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 113 of 141 SBK00005994

WJE I: !-.(

t,A?,.l I:I,.IAI S :~CII ?.! II RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 110 Date 03/29/2016 Sample I.D. # 8CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4-1/4 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactmed []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3/4in. Width: 1 rail Plastic shrinkagef-1 Early drying stuinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Colin: brown[] gray[] buff[:] Shape: angular[] subangular [] subroundedl-I rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand [] Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: rnils width: in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: bard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no []

Different Surface layer:

Unhydrated cement particles:

Calcimn Hydroxide:

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker [] lighter I-1 Alite []

belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size:

I.tm Content: abundant []

moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Hydration:

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no [] I ~v/cm near top [] or bottom [] : 0. -- 0. same []

Carbonation depth: Top: N/A bottom:[ Crusher fines: No [] Yes [] : %

Estimated Paste: 25 - 27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-5 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] uni~brm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)_, [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Crack branch out and stops.

No ASR. Air more uniform than BC.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 114 of 141 SBK00005995

RHR aad CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 111 Date 03/29/2016 Sample I.D. # 8DC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: No Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None[] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partialdeptb [] Length: in. Width: mil Plastic sl-uinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other" defect Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buft~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[-] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fiesh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

yes [] I thickness:

harder [] so,el" []

darker[] lighter[]

Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypeIII[] White[] Other[]

gm Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/era: 0.45-- 0.50 retempering: yes [] no []

xv/c~n neat" top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste:

25 - 27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-5 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR. More secondary deposits in voids.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 115 of 141 SBK00005996

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 112 Date 03/29/2016 Sam[ale I.D.

1. 9 Finishing: broom [] trowel []

tine [] 1brined [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 2-1/4 Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

2-114 I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: in. Width: 32 mils Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse

-MS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] bufflZ] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: darkgray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] rnoderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no ~[

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape: tabular []

subconchoidal [] semiconchoidal [] finely granular []

[] I thickness:

harder [] softer []

darker~l lighter[]

yes Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypellI[] White[] Other[]

b~m Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Hydration:

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth:

Top:

1/8 - 1/16" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste:

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-eutrained

[]

air content: 6-112 112 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unilbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR. Voids clean Plmtograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 116 of 141 SBK00005997

WJE RHR and CS Equipment Vault at NextEra Energy Seabroak Station Petrographic Examination of Concrete Cores May 26, 2016 Page 113 Date 03/28/2016 Sample I.D. # 10 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3-3/4 in. Widtb: 1/32" Plastic shrinkage[] Early drying sNinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Many random fine cracks Aggregate Coarse NMS:

Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Calm: brown[] gray[] buft]~ Shape: angularNl subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica

% natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Calm: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no []1 Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

]

subconchoidal []

semiconchoidal [] finely granular []

yes [] ] thielca~ess:

harder [] softer []

darker I-1 lighter[]

Alite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypeIII[] White[] Other[]

pm Content: abundant [] moderate [] rare []

tabular [] patch~ [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/32" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials 6-- 6-1/2 bags/cy

] SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 5-6 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional hlfornmtion Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] F/T [] Other:

Moderate ASR. Vertical cracks (3-3/4/" long)

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 117 of 141 SBK00005998

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 114 Date 03/30/2016 Sample I.D.

1. 10 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

CracMng: None[:] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3 ins. Width: 0.25ram Plastic shrinkage[] Early d~3,ing stu-inkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect /

Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

1%

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray-buft~l Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

1%

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width: in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardN] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fresh fracture surfaces:

no []l Calcium Hydroxide:

Hydration:

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker[] lighter[]

Alite []

belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

~v/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cemeutitious Materials 6-- 6-1/2 bags/cy I scM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entraiued []

marginal [] non-eutrained

[]

air content: 5-6 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional hfformation Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Moderate severe ASR.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 118 of 141 SBK00005999

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 115 Date 03/28/2016 Sam[de I.D. # 10 CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 7" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1-1/2 in. Width: 0.14ram Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microc~3~stalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angular[] snbangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dmk gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fresh fracture surfaces:

no []l Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

I subconchoidal [] semiconchoidal [] finely granular []

[] I thickness: harder [] softer [] darker U1 lighter[]

yes Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] Typell/V[] TypeIII[] White[] Other[]

lam Content: abundant [] moderate [] rare []

patchy [] string), []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

~v/cm neat" top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

[ Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 5-6 %

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2rid deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] FiT [] Other:

More severe ASR than #10 AB. Most voids are coated with ettringite or Ca(OH)~_. A few with gel.

Photograpb: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 119 of 141 SBKO0006000

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 116 Date 03/28/2016 Sample I.D. # 11 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 2-1/2" Top: intact [] delaminated [] scaled []

Bottmn: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

[ Corrosion: no [] moderate [] severe []

CracMng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 1 in. Width: 1 nails Plastic shrinkage[] Early d~Ting shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: darkgray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fiesh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] [ yes [] I thickness: harder [] softer [] darker K1 lighter 1-1 Afire [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypeIII[] White[] Other[]

Size: ~m Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] string), []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.43 -- 0.48 retempering: yes [] no []

w/era near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/32" bottom:

Crusher fines: No [] Yes [] :

Esti~nated Paste: 25 - 27 %

I Cementitious Materials 6-- 6-l/2 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-4%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)a [] Other [] thin coat [] thick coat [] full [] some[-1 most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulfate attack [] F/T [] Other:

Multiple paint layer total 0.521mm. 4-5 layer. Voids coated with gel. Few ettringite. Severe ASR.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 120 of 141 SBKO0006001

WJE RHR aad CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exmniuation of Concrete Cores May 26, 2016 Page 117 Date 03/28/2016 Sample I.D. # 11 BC Finishing: broom [] tro~vel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 2-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

] Corrosion: no [] moderate [] severe []

CracMng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3-1/2 in. Width: 0.2 mm Plastic sl~-inkage[] Early d~;cing stuinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width: in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard~l moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh flacture surfaces:

no -l Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal [] semiconchoidal [] finely granular []

[] I thickness: harder [] Softer [] darker I-1 lighter[]

yes Alite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypeIII[] White[] Other[]

Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

pool" []

Bulkw/cm: 0.43-- 0.48 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :.

Estimated Paste: 25-27 %

] Cementitious Materials 6-- 6-1/2 bags/cy

] SCM: no [] yes []

Fly asia: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-4%

Coarse [] fine-spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)a [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sulthte attack [] FFT [] Other:

Severe ASR. Wide cracks with gel. All reaction CA is quartzite..

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 121 of 141 SBKO0006002

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 118 Date 03/29/2016 Sample I.D. # 11 CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 2-3/4-5" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3-1/2 in. Width: 0.15 rrma Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buffl~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fractme surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] ] thicluless: harder [] softer [] darker[] lighter[]

Alite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] Type Ill[] White[] Other[]

Size: /am Content: abundant [] moderate [] rare []

Shape: tabular [] patch~ [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.43-- 0.48 retempering: yes [] no []

w/cm near top [] o1" bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

[ Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly asb: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

~narginal [] non-entrained

[]

air content: 3-4%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sultate attack [] F/T [] Other:

Severe ASR.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 122 of 141 SBKO0006003

RHR and CS Equipment Vault at NextEra Euergy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 119 Date 03/29/2016 Sample I.D. # 11 DE Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 2-5" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

CracMng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3-1/2 in. Width: 0.1 mm Plastic shrinkage[] Earl), drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray-bufl~ Shape: angular[] subangular [] subrounded{-I rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal []

semiconchoidal [] finely granular []

yes [] I thickness:

harder [] sofl.er []

darker V1 lighter l-I Alite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIlI[] White[] Other[]

gm Content: abundant [] moderate [] rare []

tabular [] patch~ [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cln: 0.43-- 0.48 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica franc: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-4%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] uniform [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Informatiow Thin section [] Point count []

ASR [] DEF [] SuH~.te attack [] F/T [] Other:

Severe ASR.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 123 of 141 SBK00006004

[ b~ iI N 1.1:t~

At\\(II tl IICI B RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 120 Date 03/30/2016 Sample I.D. # 12 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder[] Chunk [] Size: DXL 4 X 5-3/4" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Covet" depth:

I Cmrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Pmtial depth [] Length: 3-1/2 in. Width: 0.204 nma Plastic shrinkage[] Early dlTing shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrTstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Colin: brown[] gray[] buff[] Shape: angular[] subangular [] subroundedl-1 rounded []

Fine manufactured []

Major: limestone [] qumlz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fiesh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] [ thickness: harder" [] softer [] darker[] lighter I-1 Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypelII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] string), []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk~v/cm: 0.43-- 0.48 retempering: yes [] no []

~v/em near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: partial 1/8" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

[ Cementitious Materials 6-- 6-1/2 bags/cy

] SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal []

non-entrained

[]

air content: 3-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)z [] Other [] thin coat [] thick coat [] full [] someN] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Relatively severe ASR Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 124 of 141 SBKO0006005

AI~ I IIll:t:l\\

MAIt:I.,IAI~ 1i-ItF!l!~,l~,

RHR and CS Equipment Vatflt at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 121 Date 03/31/2016 Sample I.D. # 12 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2" Top: intact [] detaminated [] scaled []

Bottmn: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 3-1/2 in. Width: 0.146 mm Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microc~Tstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Colin: brown[] gray[] bufflZ] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded-rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: darkgray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] I thiclmess: harder [] softer [] darker I-1 lighter []

Afire [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypelII[] White[] Other[]

Size: ~tm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.43-- 0.48 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

] Cementitious Materials 6-- 6-1/2 bags/cy

] SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void S~¢stem entrained []

marginal [] non-entrained

[]

air content: 2-1/2 1/2%

Coarse [] fine[] spherical [] inegular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional hlfonnation Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] FFF [] Other:

Relatively severe ASR Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 125 of 141 SBKO0006006

WJE RHR~d CS Equipment VaultatNextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 122 Date 03/31/2016 Sample I.D. # 12 CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 4 in. Width: 0.236 mm Plastic slninkage[] Early do, ing stuinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angularNI subangular [] subrounded[] rounded []

Fine manu~actured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fractme surfaces:

Different Surface layer: no [] I Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal []

semiconchoidal [] finely granular []

yes [] I thickness:

harder [] softer []

darker[] lighter[]

Afire [] belite [] fertile []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

gm Content: abundant []

moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.43-- 0.48 retempering: yes [] no []

w/era near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 2-1/2-3-1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Relatively severe ASR Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 126 of 141 SBKO0006007

At((IIIII(II~

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 123 Date 03/28/2016 Sample I.D. # 13 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6-1/2" Top: intact [] delalninated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 4 in. Width: 1/16" Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microerystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[-] gray[] bufi~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] pool []

Fractured surface around a~. [] Through a~. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Colin: darkgray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] vmiable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fi-esh fi-acture surfaces:

no ~1 Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

subconchoidal []

semiconchoidat [] finely granular []

yes []

thickness:

harder [] softer []

darker I-1 lighter []

Alite []

belite [] ferrite []

Estimated volume:

~15% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

lain Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0, 45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: <1/32 bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void S~¢stem entrained []

marginal [] non-entrained

[]

air content: 4-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] uniform [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count [] ASR [] DEF [] Sullhte attack [] F/T [] Other:

Surface paint greenish to white. 0264mm thick.

Voids clean. Non-uniform with some clusters.

Cracks branch out at 5" fiom top surface.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 127 of 141 SBKO0006008

RHR and CS Equip~nent Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 124 Date 03/28/2016 Sample I.D.

1. 13 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/8" Top: intact [] delaminated [] scaled[]

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Pmtial depth [] Length: in. Width: 3/32" Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buft~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] qua(tz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular[] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. []

Through ag~. []

Fibers: no [] yes [] diameter:

nfils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] unifurm [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

no []

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

I yes [] I thickness:

harder [] softer []

darker[] lighter I-1 Alite [] belite [] ferrite []

Estimated volume:

~15% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelIiV[] TypeIII[] White[] Other[]

Size: lain Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/era: 0.45-- 0.50 retempering: yes [] no []

w/era near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-4%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~ [] Other [] thin coat [] thick coat [] full [] somel-1 most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sultate attack [] FiT [] Other:

Cracks getting wider through CA. Cracks branch out.

No evidence of ASR except for some rims.

Less air. Also clean.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 128 of 141 SBKO0006009

RHR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 125 Date 03/25/2016 Sample I.D. # 14 Finishing: broom [] trovvel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4-3/4" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactmed []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: in. Width: 3/32" Plastic shrinkagel-q Early drying sluinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcustalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buff[] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around ag~. [] Through ag~. []

Fibers: no [] yes [] diameter: mils width:

in. Other compmlents:

Paste Luster: vitreous [] semi viUeous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fiesh fracture surfaces:

Different Surface layer:

no []

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker[] lighter[]

Alite []

belite [] fenire []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

Typel [] TypelI/V[] Type Ill[] White[] Other[]

pm Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor i-1 Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

~v/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 3/32" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials 6-- 6-1/2 bags/cy I SCM: no [] yes []

Fly asia: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-4%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)a [] Other [] thin coat [] thick coat [] full [] somel-1 most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 129 of 141 SBKO0006010

WJE RHR and CS Equipmeut Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 126 Date 03/28/2016 Sannple I.D. # 15 AB Finishiug: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6-318" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactmed []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

CracMng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partialdepth [] Length: 5-3/8 in. Width: 1/32" Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microc~Tstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] bufI~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] qua(tz [] feldspar [] chetq. [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around ag~. [] Through ag~. []

Fibers: no [] yes [] dimneter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardN] moderately hard[] moderately softl-1 soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcimn Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] [ yes [] I thickness: harder [] soltel [] darker I-1 lighter[]

Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size: ~m Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/era: 0.45-- 0.50 retempering: yes [] no []

w/cm neat" top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: <1/32" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 2~- 27 %

] Cementitious Materials 1/2-- 6 bags/cy

] SCM: no [] yes []

Fly asia: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System eutrained []

margiual [] non-entrained

[]

air content: 3-1/2-4-1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unilbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Infornlation Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] FfF [] Other:

No ASR. Surface paint 0.17mm.

Air void clean.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 130 of 141 SBKO0006011

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 127 Date 03/28/2016 Sample I.D. # 15 BC Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5-1/4" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

[ Cmrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 5-3/8 in. Width: 1/32" Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buft~ Shape: angular[] subangular [] subrounded[-1 rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angula, [] subangular [] subroundedN rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width: in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardN] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fiesh fracture surfaces:

Different Surface layer: no [] I Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker[] lighter[]

Alite []

belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypelII[] White[] Other[]

i_tm Content: abundant []

moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials 1/2-- 6 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void SysCem entrained []

marginal [] non-entrained

[]

air content: 4-5%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] uniform [] clusters [] around CA []

voids: clean []

2rid deposits [] ettlingite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR.

Some CA had internal cracking, not extending into paste.

Void clean.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 131 of 141 SBK00006012

RHR and CS Equipment Vault at NextEra Euergy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 128 Date 03/29/2016 Sample I.D. # 16 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Throughagg [] Partial depth [] Length: 1/4 in. Width: 1 rail Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray-buffl~ Shape: angular[] subangulm" [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded-rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. I Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hardl-I moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texture of fresh fracture surfaces:

no NI Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker[] lighter []

Alite []

belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

gm Content: abundant [] moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/era near top [] or bottom [] : 0.

-- 0.

same []

Carbonatiou depth: Top: 1/4 (partial) bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials 16-- 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

Mild ASR.

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Voids had small clusters.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 132 of 141 SBK00006013

WJE I:N~,I NI.I:t(S AI~.~II tl IIC I ~.

RtLR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 129 Date 03/29/2016 Sample I.D. # 16 BC Finishing: broom [] trmvel []

tine [] formed [] cnt []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

[ Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: 2 in. Width: 0.1ram Plastic shrinkage[] Early dccing shrinkage [] Later dr),ing shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray-buflI] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] ] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: nails width:

in. Other components:

Paste Luster: vitreous [] senti vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no -l Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal [] semiconchoidal [] finely granular []

[] I thickness: harder [] softer [] darker[] lighter[]

yes Alite [] belite [] ferrite []

Estimated votume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

p.m Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45--0.50 retempering:yes []no []

w/cm near top [] or bottom []: 0. --0.

sameN]

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials - 6-1/2 bags/c),

I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 3-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unilbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[~ most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sultate attack [] F/T [] Other:

Mild ASR.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 133 of 141 SBK00006014

WJE

~,,I:\\ i I I,IAL~, ~,ill ~\\! llhlh RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 130 Date 03/29/2016 Sanlple I.D. # 16 CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: Fractmed Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 6" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Craeldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Pmtial depth [] Length: 3 in. Width: 0.107ram Plastic shrinkagel-I Early drying stninkage [] Later drying shriukage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buffl~ Shape: angular-subangulm" [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hardl-I moderately softV1 soft [] uniform [] gradual change [] variable on a microscale []

Different Surface layer:

Unhydrated cement particles:

Texlure of fresh fiacture surfaces:

no ~I Calcium Hydroxide:

Hydration:

Size:

Shape: tabular []

subconchoidal []

semiconchoidal [] finely granular []

yes []

thickness:

harder [] softer []

darker [] lighter []

Atite []

belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] Type Ill[] White[] Other[]

lam Content: abundant []

moderate [] rare []

patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.45-- 0.50 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials - 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

~narginal [] non-entrained

[]

air content: 3-1/2 I/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

Moderate ASR.

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Air void contains secondary deposit.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 134 of 141 SBK00006015

WJE AIb~:! II If~:1 ~

RHR and CS Equipment Vault at NextEra Euergy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 131 Date 03/30/2016 Sample I.D.

1. 18 Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 2-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

] Corrosion: no [] moderate [] severe []

CracMng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: in. Width: mm Plastic shrinkage[] Early &Ting shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chm~ [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[-I gray[] buffl~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dmk gray [] gray [] light gray [] buff [] other:

Hardness: hard~ moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no ~I Different Surface layer:

Unhydrated cement particles:

Calcimn Hydroxide:

Size:

Shape:

H)~dlation:

I subconchoidal [] semiconchoidal [] finely granular []

[] I thickness: harder [] softer [] darker[] lighter[]

yes Alite [] belite [] ferrite []

Estimated volume:

~I0% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

gm Content: abundant [] moderate [] rare []

tabular [] patchy [] string~ []

Estimated volume:

% of paste advanced []

nomml []

poor []

Bulkw/cm: 0.43-- 0.48 retempering: yes [] no []

~v/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

] Cementitious Materials - 6-1/2 bags/cy

] SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entraiued []

~narginal [] non-entrained

[]

air conteut: 3 - 4%

Coarse [] fine[] spherical [] irregular [] bleed cbatmels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

No ASR.

Voids clean.

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Photograph: yes [] no []

Photo: Lapped [] fiactured [] tbin section [] Other [] caption:

FP101034 Page 135 of 141 SBK00006016

RHR and CS Equipment Vault at NextEra Energy 8eabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 132 Date 03/30/2016 Sample I.D. # 19 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder I~ Chunk [] Size: DXL 4 X 6" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactmed []

popout [] other:

barrier [] other:

Coved" depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: in. Width: mm Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microc~2cstalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buffl~] Shape: angular[] subangu[ar [] subrounded[-I rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width: in. Other components:

Paste Lusted: viUeous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no []l Different Surface layer:

Unhydrated cement particles:

Calcimn Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal []

semiconchoidal [] finely granular []

yes [] [ thickness:

harder [] softer []

darker[] lighter[]

Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

gm Content: abundant [] moderate [] rare []

tabular [] patchy [] string~ []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.43-- 0.48 retempering: yes [] no []

xv/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/8-1/4" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials - 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

aid" content: 4-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unifurm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)z [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional hfformation Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

No ASR.

Clean voids. Only one void with Ca(OH)z Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 136 of 141 SBK00006017

RHR m~d CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 133 Date 03/30/2016 Sample I.D. # 19 BC Finishiug: broom [] tro~vet []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fiactured []

popout [] other:

bahlet [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

CracMng: None[] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: in. Width: mm Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] grayNl buft~] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] qua(tz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] unifurm [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

no NII Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

I subconchoidal [] semiconchoidal [] finely granulm" []

[] ] thickness: harder [] softer [] darker l-I lighter[]

yes Alite [] belite [] fenite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] Typell/V[] TypelII[] White[] Other[]

pm Content: abundant [] moderate [] rare []

tabular [] patchy [] string)~ []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0.43 -- 0.48 retempering: yes [] no []

w/era neat-top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials - 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] --

GGBFS: [] --

% Silica fume: []

Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-1/2-5-1/2%

Coarse [] fineN] spherical [] irregular [] bleed channels [] water gains [] unilbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)~_ [] Other [] thin coat [] thick coat [] full [] someNl most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] FiT [] Other:

No ASR.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 137 of 141 SBK00006018

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 13,1 Date 03/25/2016 Sample I.D.

1. 20 AB Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] flat [] fractured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Pmtial depth [] Length: in. Width: 1132:

Plastic shrinkage[] Early dr},ing shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other:

Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] grayN] buff[] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] Bonding: tight [] fair [] poor []

Fractured smface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardN] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] I thickness: harder [] softer [] darker[] lightelU1 Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypelII[] White[] Other[]

Size: pm Conteut: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk w/cm: 0.43-- 0.48 retempering: yes [] no []

w/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: 1/8" bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials - 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

~nargiual [] non-entrained

[]

air content: 4-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unHbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some~ most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sultate attack [] F/T [] Other:

No ASR.

Crack discontinuous and shifted.

Photograph: yes [] no []

Photo: Lapped [] flactured [] thin section [] Other [] caption:

FP101034 Page 138 of 141 SBK00006019

WJE RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 135 Date 03/25/2016 Sample I.D. # 20 BC Finisbing: bromn [] trowel []

tine [] formed [] cut []

coating [] other: Fractured Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around egg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through egg [] Partial depth [] Length: <1 in. Width: <1 mil Plastic shrinkage[] Early drying sbxinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: browni-1 gray[] buff[] Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedN] rounded []

Distribution: uniform [] segregated [] Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hardl-I moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fractnre surfaces:

no ~I Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Size:

Shape:

Hydration:

] subconchoidal [] semiconchoidal [] finely granular []

[] ] thickness: harder [] softer []

darker[] lighter[]

yes Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] Typelll[] White[] Other[]

I_tm Content: abundant [] moderate [] rare []

tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk~v/cm: 0.43-- 0.48 retempering: yes [] no []

~v/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials - 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unilbrm [] clusters [] around CA []

voids: clean []

2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Very minor ASR detected.

Photograph: yes [] no []

Photo: Lapped [] fiactured [] thin section [] Other [] caption:

FP101034 Page 139 of 141 SBKO0006020

RHR and CS Equipment Vault at NextEra Energy Seabrook Station Petrographic Examination of Concrete Cores May 26, 2016 Page 136 Date 03/25/2016 Sample I.D. # 20 CD Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other:

Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 5" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactuled []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracldng: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Length: <112 in. Width: <1 mil Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Color: brown[] gray[] buft~ Shape: angular[] subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subroundedNl rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractmed surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: nails width:

in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hardl~ moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

no []

Unhydrated cemeut particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

I yes [] I thickness:

harder [] sorer []

darker[] lighter[]

Alite [] belite [] ferrite []

Estimated volume:

-10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypelI/V[] TypelII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulk~v/cm: 0.43-- 0.48 retempering: yes [] no []

~v/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25 - 27 %

I Cementitious Materials - 6-1/2 bags/cy I SCM: no [] yes []

Fly asia: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

margiual [] non-entrained

[]

air content: 4-1/2 1/2%

Coarse [] fine-spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)_~ [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Very mild ASR.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

FP101034 Page 140 of 141 SBK00006021

.,\\t(( :1 II I1{~ : I t

,\\IAt I:I,:IAI ! *,CIIX I I~ ! i RHR and CS Equiplnent Vault at NextEra Energy Seabrook Station Petrographic Exmnination of Concrete Cores May 26, 2016 Page 137 Date 03/25/2016 Sample I.D. # 20 DE Finishing: broom [] trowel []

tine [] formed [] cut []

coating [] other: fiactured Steel: imprint Project No: 2014.3453.2 Made by: DXC

==

Description:==

Core [] Cylinder [] Chunk [] Size: DXL 4 X 4-1/2" Top: intact [] delaminated [] scaled []

Bottom: rough [] formed []

eroded severely [] eroded slightly []

cut [] fiat [] fiactured []

popout [] other:

barrier [] other:

Cover depth:

I Corrosion: no [] moderate [] severe []

Cracking: None [] Micro [] Horizontal [] Around agg [] Full depth [] Random [] Peripheral []

Yes [] Macro [] Vertical [] Through agg [] Partial depth [] Lengtb: 1/2 in. Width: 1 nail Plastic shrinkage[] Early drying shrinkage [] Later drying shrinkage [] thermal [] Crazing [] Other: ASR Other defect Aggregate Coarse NMS: Gravel []

Major: limestone [] quartzite [] granite [] chert [] sandstone [] Other:

3/4" Composition: Fine and microcrystalline quartz, mica, feldspar, pyrite, and calcite Crushed []

Colin: brown[] grayNl buft~ Shape: angular-subangular [] subrounded[] rounded []

Fine manufactured []

Major: limestone [] quartz [] feldspar [] chert [] granite [] Other:

combined []

Minor: limestone [] quartz [] feldspar [] chert [] granite [] Other: Mica natural Sand []

Shape: angular [] subangular [] subrounded[] rounded []

Distribution: uniform [] segregated [] I Grading: well [] poor [] gap [] I Bonding: tight [] fair [] poor []

Fractured surface around agg. [] Through agg. []

Fibers: no [] yes [] diameter: mils width: in. Other components:

Paste Luster: vitreous [] semi vitreous [] dull [] Color: dark gray [] gray [] light gray [] buff [] other:

Hardness: hard[] moderately hard[] moderately soft[] soft [] uniform [] gradual change [] variable on a microscale []

Texture of fresh fracture surfaces:

Different Surface layer:

Unhydrated cement particles:

Calcium Hydroxide:

Hydration:

subconchoidal [] semiconchoidal [] finely granular []

no [] I yes [] I thickness: harder [] softer [] darker [] lighter[]

Alite [] belite [] ferrite []

Estimated volume:

~10% of paste angular []

subangular []

subrounded []

hydration rims []

TypeI [] TypeII/V[] TypeIII[] White[] Other[]

Size: gm Content: abundant [] moderate [] rare []

Shape: tabular [] patchy [] stringy []

Estimated volume:

% of paste advanced []

normal []

poor []

Bulkw/cm: 0, 43-- 0,48 retempering: yes [] no []

xv/cm near top [] or bottom [] : 0. -- 0.

same []

Carbonation depth: Top: N/A bottom:

Crusher fines: No [] Yes [] :

Estimated Paste: 25-27 %

I Cementitious Materials - 6-1/2 bags/cy I SCM: no [] yes []

Fly ash: [] -- % GGBFS: [] -- % Silica fume: [] -- % Other: []

Air Void System entrained []

marginal [] non-entrained

[]

air content: 4-1/2 1/2%

Coarse [] fine[] spherical [] irregular [] bleed channels [] water gains [] unitbrm [] clusters [] around CA []

voids: clean [] 2nd deposits [] ettringite [] Ca(OH)2 [] Other [] thin coat [] thick coat [] full [] some[] most []

Additional Information Thin section [] Point count []

ASR [] DEF [] Sulfate attack [] F/T [] Other:

Mild ASR.

Photograph: yes [] no []

Photo: Lapped [] fractured [] thin section [] Other [] caption:

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