ML102870979

Email - from: Thomas, George to: Naus, Dan J. CC: Lake, Louis Dated Tuesday, January 12, 2010 3:59 PM Subject: FW: Petrographic Report

ML102870979
Person / Time
Site:	Crystal River
Issue date:	01/12/2010
From:	George Thomas Office of New Reactors
To:	Naus D Oak Ridge
References
FOIA/PA-2010-0116
Download: ML102870979 (17)

Text

-Sengupta, Abhijit From:

Thomas, George Sent:

Tuesday, January 12, 2010 3:59 PM To:

Naus, Dan J.

Cc:

Lake, Louis-

Subject:

FW: Petrographic Report Attachments:

MACTEC Petro Chunk..pdf From: Miller, Craig L [1]

Sent: Tuesday, January 12, 2010 2:30 PM To: Thomas, George

Subject:

FW: Petrographic Report Third and last one.

From: Miller, Craig L Sent: Tuesday, January 12, 2010 2:23 PM To: 'Thomas, George'

Subject:

RE: Petrographic Report

George, Attached are the various test reports from MACTEC and S&ME (excluding the first two reports that you already have).

There have also been some tests that PHI had performed at Photometrics and the University of Colorado. I will send you those final reports as I get them from P11.

Let me know if you have any questions.

Thanks, Craig From: Thomas, George [2]

Sent: Tuesday, January 12, 2010 1:15 PM To: Miller, Craig L

Subject:

RE: Petrographic Report Yes, Craig. I would like to also have the additional test reports that you have.

Thanks.

George From: Miller, Craig L [3]

Sent: Tuesday, January 12, 2010 11:02 AM To: Thomas, George

Subject:

RE: Petrographic Report Hi George, We do have a couple more petrography reports, but we also have a number of additional test reports (strength, density, modulus of elasticity, etc.). Would you like all of the test reports that we currently have?

P 105-

Let me know and I will send them asap.

Thanks, Craig From: Thomas, George [4]

Sent: Tuesday, January 12, 2010 10:19 AM To: Miller, Craig L

Subject:

RE: Petrographic Report Hello Craig, You had previously provided us with a Mactec Petrography report dated 11-11-09 and a CTL Petrography Report dated 11-2-09. Could you please email me other petrographic reports that have come in since then.

Thanks.

George Thomas Special Inspection Team - USNRC 301-415-6181 From: Miller, Craig L [5]

Sent: Saturday, November 21, 2009 6:20 PM To: Thomas, George

Subject:

FW: Petrographic Report

George, Here is the reply I received regarding your question on core 2. I have not yet determined if the report will be revised to correct the misleading statements.

Thanks, Craig From: Wilson, David [mailto: DWILSON@mactec.com]

Sent: Thursday, November 19, 2009 11:04 AM To: Miller, Craig L

Subject:

RE: Petrographic Report HI Craig-I did do some limited observations on this core but I didn't see anything that would really help in our analysis. The control sample was submitted for comparison, but to compare the existing fracture to a new fracture we made some fresh fractured surfaces in our lab in sample 5 to compare fresh vs. the existing fractured surface. Do you need us to provide a report on the core #2?

Thank you

-David 2

From-: Miller, Craig L [6]

Sent: Wednesday, November 18, 2009 9:27 AM To: Wilson, David

Subject:

Petrographic Report

David, A question was raised by the NRC on the petrographic report. It mentions that core 2 (MACTEC # 21270) was a "control sample" used for limited observations. However, there is no discussion of how it was used or what was observed in the report. Can you provide any details on this core?

Thanks, Craig 3

' MACTEC engineering and constructing a better tomorrow December 23, 2009

ýý f rAx P4 Mr. Craig Miller Progress Energy

Subject:

Report of Petrographic Observations Crystal River Containment, Wall Steam Generator Replacement Project..

Crystal River Nuclear Generating Facility, Florida MACTECProject 6468-09-2535 Dear Mr. Miller MACTECý Engineering: and Consulting, Inc. (MACTEC)' is pleased to present this report of our petrographic: observations performed on a concrete chunk that was shipped to, our laboratory under chain of custody. It is our understanding the: chunk is from an area of. the containment wall where a fracture was discovered running parallel to the surface at a depth of approximately 8 to.9 inches. We understand the submitted, chunk contains the subject fractured surface and a portion of the concrete that was cast, against a tendon duct.

The purpose of our work was to perform a petrographic analysis of the sample to observe the fractured.

surface. and the, surface that was cast, against the tendon. duct for depth of carbonation 'nd other, similarities or differences.

PETROGRAPHIC OBSERVATIONS:

A Petrographic Analysis is a visual and microscopic analysis of cementitous, materials perfofmed by a qualified petrographer. Petrographic examinations are typically performed on polished sections or thin sections. Polished sections are generally ýcut sections that, have been, lapped (ground flat and, smooth) and polished.and. are observed using reflected polarized light: microscopes at magnifications of up to 80X.

Thin. sections are samples mounted to glass slides and ground to specific thicknesses (generally 20, 30. or 40 microns depending on the application) and. observed using transmitted polarized light microscopes at magnifications of up to 600X.

A petrographic evaluation may be performed to identify and describe a specific item of interest such as.

the presence or extent of distress in concrete, or to provide a general characterization and measure of MACTEC Engineering and Consulting, Inc..

9177 Sky Park:Court, San Diego, CA 92123 T Phone: 858-278-3600 - Fax: 858-278-5300 www.ma(ctec.com

Crystal RiverConcrete Core Observations December 23, 2009 Report of Petrographic Observations MACTEC Project No, 6468-09-2535 Crystal River Nuclear Generating Facility, Florida quality of the, materials being evaluated.

The petrographic evaluation of concrete examines the; constituents, of the concrete including coarse aggregates, fine aggregates, embedded; items, hardened paste, and air void structure. The examination identifies cracking present in the concrete, indications of corrosion, extent of damage from external.sources, aggregate reaction, chemical. attack, sulfate attack,.

freeze thaw cracking,. acid attack, and other mechanisms of deterioration. The petrographic examination can also estimate the water to cement ratio, look for indications of mineral additives and unhydrated cement particles in the paste, look for indications of bleed water. and excess porosity in the concrete, look for indications of curing procedures used and methods of finishing, observe micro cracking present and other conditions within the concrete which might give information on the overall quality or the quality of any particular constituent material. Aggregate mineralogy, rock types, and mineral crystal. structure can be identified when thin sections are viewed under a transmitted polarized light microscope.

TEST RESULTS AND OBSERVATIONS PETROGRAPHIC OBSERVATIONS-The petrographic analysis was performed in general accordance. with the applicable.sections of ASTM C 856-04 Standard Practice for Petrographic. Examination of Hardened Concrete.

The results of our petrographic analysis are on the attached sheets, Summary of Petrographic Observations of Hardened Concrete.

Photographs from our examination are attached.

A summary of our observations and discussion areas follows.

Aggregate The coarse, aggregate generally consisted of a natural carbonate crushed. rock with a maximum size of. 3/4 inch.. The rocks types observed included limestone and fossiliferous limestone. The particles were generally angular to.sub-rounded in shape and fairly evenly distributed. The coarse aggregate appeared to compriseapproximately 50% of the total aggregate quantity with the remaining fraction being fine.

aggregate.

The fine aggregate was observed to be a: natural siliceous sand consisting mostly: of quartz. Theý particles.

were generally sub-angular to sub-rounded in shape and fairly evenly distributed.

Cement Paste' The cement paste, was medium light: gray (Reference, colors from The Geological Society of America:

Rock-Color Chart, 1991). The paste appeared moderately hard and not easily scratched with a hardened steel point... The concrete: appeared to have been placed at. a moderately low. water to cement ratio, 2

Crvstal River Concrete Core Observations:

December 23, 2009 Report of Petrographic Observations MACTEC Project No. 6468-09-2535 Crystal River Nuclear Generating Faciliiy, Florida possibly in the range of 0.4 to 0.5. Indication of placement at a high water to cement ratio such as significant bleed channels and water gain voids were not observed.

The fractured surface and the surface that was cast against the tendon duct showed surficial carbonation that may be dueto exposure to the atmosphere after removal from the structure. Significant carbonation or differences in the distribution of hydrated and partially. hydrated cement particles was not: observed between the two surfaces.

Air Voids. Voids, and Cracks The concrete appearedto be air entrainedland had a total air content estimated to be around.2 to 3%. The:

voids were generally small and spherical. Some air void clustering was observed around a few coarse aggregate particles.. The air voids distribution was moderately un-eveni and some. small areas lacked air entrainment.. There was limited mineral growth. observed in some of the air voids. Calcium hydroxide:

was observed lining some air voids.

Some limited minor fractures were observed on the fractured surface-and the surface cast against the duct.

One lone hairline fracture was observed and shown in photograph 6.

SUMMARY

The fractured. surfaceand the, surface that was cast: against the tendon duct showed surficial, carbonation that may be due to exposure to the atmosphere after removal from the structure. Significantucarbonation or differences in the distribution of hydrated-and partially hydrated cement particles was not observed between the two surfaces.

Sincerely MACTEC ENGINEERING AND CONSULTING, INC.

David C. Wilson Ufu ilek, PhD., P.E.

Senior Principal Professional

'Principal Engineer by with permission Attachments:

Photographs.#1 -#14 Summary of Petrographic Observations for Cores 21 269A and 21271 A 3

Crystal River Concrete Core Observations Report of Petrographic Observations Crystal River Nuclear Generating Facility, Florida December 23, 2009 MACTEC Project No. 6468-09-2535 U

I Photozranh #1 Remarks Sample as received.

Photograph #2 Remarks Sample as received.

I

Crystal River Concrete Core Observations Report of Petrographic Observations Crystal River Nuclear Generating Facility, Florida December 23. 2009 MACTEC Project No. 6468-09-2535 Photograph #3 1

Remarks 9 A cut section of the sample after staining one area with phenolphthalein to observe for carbonation (only the pink area was treated with the phenolphthalein).

Carbonated areas remain clear and non-carbonated areas turn pink. The portion of the surface cast against the tendon duct is shown by the red arrow. The fractured surface is shown by the yellow arrow.

Photorph #4 Remarks A cut section of the sample after staining one area with phenolphthalein to observe for carbonation (only the pink area was treated with the phenolphthalein).

Carbonated areas remain clear and non-carbonated areas turn pink. The portion of the surface cast against the tendon duct is shown by the red arrow. The fractured surface is shown by the yellow arrow.

2

Crystal River Concrete Core Observations Report of Petrographic Observations Crystal River Nuclear Generating Facility, Florida December 23, 2009 MACTEC Project No. 6468-09-2535 Photograph #5 Remarks The polished section prepared from the sample.

Photograph #6 Remarks The red line shows the approximate location of the hairline crack that was observed in the polished section.

3

Crystal River Concrete Core Observations Report of Petrographic Observations Crystal River Nuclear Generating Facility, Florida December 23, 2009 MACTEC Project No. 6468-09-2535 I

p Photograph #8 Remarks Photograph #8 Remarks S Photomicrograph in plane polarized light showing the fractured surface. Width of view is approximately 0.05 inch.

i 4

Crystal River Concrete Core Observations Report of Petrographic Observations Crystal River Nuclear Generating Facility, Florida December 23, 2009 MACTEC Project No. 6468-09-2535 Phooph #9 Remarks Photomicrograph in plane polarized light showing the fractured surface. Width of view is approximately 0.05 inch.

Photograph #10 Remarks Photomicrograph in plane polarized light showing the fractured surface. Width of view is approximately 0.05 inch.

5

Crystal River Concrete Core Observations Report of Petrographic Observations Crystal River Nuclear Generating Facility, Florida December 23, 2009 MACTEC Project No. 6468-09-2535 Photog-aph #11 Remarks Photomicrograph in plane polarized light showing the fractured surface. Width of view is approximately 0.05 inch.

Photograph #12 Remarks Photomicrograph in plane polarized light showing the fractured surface. Width of view is approximately 0.05 inch.

6

Crystal River Concrete Core Observations Report of Petrographic Observations Crystal River Nuclear Generating Facility, Florida December 23, 2009 MACTEC Project No. 6468-09-2535 Photograph #13 Remarks Photomicrograph in plane polarized light showing the fractured surface. Width of view is approximately 0.05 inch.

Photograph #14 Remarks Photomicrograph in plane polarized light showing the fractured surface. Width of view is approximately 0.05 inch.

7

JAiMACTEC t_-ý I _

11 --- 1

-1 ME

SUMMARY

OF PETROGRAPHIC OBSERVATIONS OF HARDENED CONCRETE"- ASTM C-856-04-. Ii PROJECT NAME Crystal River Core Petrography Project PROJECT NUMBER 6468-09-2535 DATE SAMPLED RECEIVED 12-2-09 SAMPLE I.D.

21378 SAMPLE SIZE AND DESCRIPTION' Chunk of Concrete identified as "small AS RECEIVED piece adjacent to sleeve". The chunk has a section that appears to have been cast against a tendon duct and reportedly has a section of the subject fractured surface adjacent to the surface cast -against the duct.

OBSERVATIONS BY David Wilson ICHARACTE.RISTIC.S........ION COARSE AGGREGATE:

Shape Angular to sub rounded.

Grading Approximately 3/3/4 maximum size Distribution Even. Approximately 50% of the aggregates appeared to be coarse aggregates with the remaining fraction being the fine aggregate.

Texture, Fine Composition Carbonate Rock Types Limestone, fossiliferous limestone Alteration:

Not observed Degree Products Coatings Not observed Rims Not observed Internal Cracking:

Generally not observed except in the vicinity of the fractured surface.

Contamination Not observed FINE AGGREGATE:

Shape Generally sub-rounded to sub-angular Grading

1. 4 and smaller' Petrographic Observations, Sample LD. 21378 Page I of 4 Form Reviewed and Approved for Use on Crystal River Cores Project 6468-09-2535 J. Allan Tice, Project Principal.

A MACTEC Distribution Even Texture Fine Composition Siliceous Rock Types Quartz Alteration:

Not Observed Degree Products Coatings Not Observed Rims Not Observed Internal Cracking A few internal fractures were observed Contamination, Not observed ICHARACTERISTICS OBSERVATIONS CONCRETE:

Air-Entrained or Not Appeared to have some air entrainment.* Total air content based on visual.observations appeared to beý 2 to 3%

Air Voids:

Mostly small and spherical. Some air, Shape void clustering was observed around a:

Size-few coarse aggregate particles. The Distribution air void distribution was moderately un-even, some small areas lacked air:

entrainment. There was somelimited,.

mineral growth observed in some of the.

air voids. Calcium hydroxide was.

observed lining some air voids.

Bleeding Not Observed Segregation Not. Observed..

Aggregate-Paste Bond...

Coarse and fine aggregates appeared to have a good bond to the cement paste with few openings. Some.

aggregate particles had increased calcium hydroxide in the paste surrounding the perimeter of~the particle.

Fractures One long hairline crack was observed and is shown in the attached photograph #6.

Some:minor fractures were observed near the portion that was cast against the duct and the portion that contained the fractured surface.

Embedded Items Not observed Shape

• Petrographic Observations, Sample LD. 21378 Page2 of 4 Form Reviewed and Approved for Use on'Crystal River Cores Project 6468-09-2535 J. Allan Tice, Project Principal

_"i MACTEC

_ Size Location Type Alteration:

Not observed Degree &Type Reaction Products

- Location:

- Identification Nature and Condition of Surface Not-observed Treatments Estimated water-cement ratio (based Appeared to have a moderately low w/c on visual observations only) ratio possibly in the range of 0.4 to 0.5ý Estimated cement content (based on Appeared to have a moderately high

-visual observations only) cement content PASTE:

Color (GSA rock color chart 1991)

Medium light gray Hardness.

Appeared moderately hard when.

scratched with a hardened steel point.

Porosity-Did not appear very porous. It took from 10 minutes to over 20 minutes to absorb 15 micro liter drops of water.

Carbonation The fractured surface and the portion that was cast against the duct did not show significant carbonation when stained with phenolphthalein. Some surf icialcarbonation was observed in

thin section observations.

Residual un-hydrated Cement:.

Some un-hydrated/partially hydrated Distribution cement particles were observed.

Particle-.Size*

There was even distribution throughout, Abundance.

the: sample.

Composition Mineral Admixtures:,

Fly-ash was not observed Size Abundance Identification Contamination:

Not observed Size Abundance Identification Petrographic Observations, SampleI.D. 21378 Page 3of4 Form Reviewed and Approved for Use on Crystal River Cores Project 6468-09-2535 J. Allan Tice, Project Principal

-,MACTEC Equipment Used:

Cannon EOS Digital, Rebel with 50mm macro lens and microscope adapters AmScope 7X.to 45X stereo zoom microscope (with and without polarized light)

Olympus BH-2 polarized light microscope Zeiss Photomicroscope IH polarized light microscope Starrett 6 inch rule SN 109000003..

Note: No M&TE used is subject to calibration requirements..

Petrographic Observations, Sample I.D. 21378 Page 4 of 4 Form Reviewed and Approved for Use on Crystal.River Cores Project 6468-09-2535 J. Allan Tice, Project Principal