ML20138N868

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Effects of 'Mudcracking' on DBA Performance of Nutec 11S
ML20138N868
Person / Time
Site: Comanche Peak, 05000000
Issue date: 04/30/1978
From:
COASTAL SCIENCE ASSOCIATES, IMPERIAL PROFESSIONAL COATINGS
To:
Shared Package
ML20138M609 List: ... further results
References
FOIA-85-59 249-78-G, NUDOCS 8511060088
Download: ML20138N868 (6)
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Y TECHNICAL REPORT i

NUMBER 249-78-G

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~ TITLE Effects of "Muderacking" on DBA performance of NIMEC tilS FOR S.R.91401 CUSTOMER Brown & Root, Inc.

Comanche Peak Submitted by: science Associates l j Approved. ,

Date: 4/78 SOIRHERN IMPERJAL COATINGS CORPORATION. LNC. )

P. O. Box 29077,

  • New Orleans, l.ouisiana 70189 l Phone: (504) 254 1433 )

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5fl T.R.9249-78-G Page 1.

Staegutra me purpose of this test was to determine what effects cracking l of the Nutec tus film has on the performance of the concrete coating system.

.j No defects were noted on the test specimen following DBA testing.

dn zwfnDoocTzou: "macracking of mutec fuS has been noted on two occasions: in the laboratory and at the Pa==aaha peak jobsite. The "mudcracking" phanammaan was observed when rapid changes in surface or air temperature took place, immediately fonowing application of the Nutec Gus. E1cometer adhesion and Designed Basis Accident tests were candneted on the laboratory specimen to assure that this phana==aaa was not deleterious to the performance of the coating sysp. No defects were noted on the test specimen followAng DBA testing at 307 F. and 58 peig. E1cometer adhesion was also demonstrated to be excellent at 650 psi and 100% failure in the concreta. The laboratory data was further supplemented by tests conducted by Brown & Root Quality Control at the Comanche Peak jobsite.

E1cometer adhesion tests were performed with values greater than 500 psi.

WfEDos: Lab. panel #3795, a concrete coupon measuring 2" x 4" x 2" was I coated with Nutec tils. The concrets had been previously coated with a concreta curing membrane, Res E. The specimen was placed,under running water, in search of water heads which would indicate the presence of a mas E surface film.

5 Satisfied that such a surfacg film was not present on the concrete, the specimen was placed in an oven at 120 F. for 15 minutes in order to expedite the applica-l tion. The concretg was still warm when the Nutec #113 was applied. The room temperature was 58 F. and dropping due to a heater an1 function, overnight the temperature in the laboratory plunged to 28 F.

The Nutec 9113 film (which had mudcracked overnight) was cured for an additional 5 daye G 70-40 F. An E1cometer Adhesion test was conducted on the mudcracked 0118 film.

l l Shortly after the mudcracking incident at Comanche Peak, the Elcometer' Adhesion damage was repaired with Nutec ells and the entire coupon topcoated with l Reactic 01201. Design Basis Accident testing was performed at Cogstal Science i j Associates with the ===4==== temperature and pressure reaching 307 F. and 58 psig.

j The DBA test was conducted over a. 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period and performed in accordance wita Mouston Lighting a Power, movision 0, 10/22/75.

l I Refer to attached Test Panel Preparation Data sheet for details of surface preparation, coating application, and curing.

REStE.TS :

a. E1cometer Adhesion - 650 psi with 1004 breakage in concrete
b. DBA testing - No defects: all sides (See attached Results sheet from Coastal Science Assoc.)

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T.R.4249-78-G

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CoucLusIcess: The "muderacked" film exhibited excellent adhesion to the concrete substrate and demonstrated the ability to withstand the high taeperature test.

and pressures of a Designed Basis Accident test. h laboratory results were further ag ported by on-site E1cometer Adhesion tests

  • conducted by Brown a moot guality control. The lowest value obeniw in.

these tests was 500 psi.

The - -*4 7' 7- -- -- is believed to occur because of large differences in surface and air toeparatures resulting in varying -4:: of e r ==iaa or contrac-tion within the thick ells film itself. Such changes can occur denever space heaters are used and also as in the case of the laboratory application, accause of its density, the concreta eahibits- a greater resistance to tempera-ture change than does the surrounding air. h temperature of the 9113 film in proximity with the concrete, closely approximates that of the concrete, whereas the tils exposed .

to the air, more closely approximates the air temperature.

REFERENCES:

Iab. Notebook #56, pp. 35,58 4 *e >=

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PHYSICAL PROPERTIES .

BECHTEL CP-954 and A.N.S.I. N-5.12 M DOCT TESTED: Nutac #11S 1 1

, M TPE SUBSTRATE: 2" x 4" x 2" concreto coupon

3. SURFACE PREPARATION: Sandswept with Crosblast #4 blasting sand.

4 PRODUCT DATA: SAMPI.E NOS. 3795

., PRODUCT APPLICATION CONDITIONS _. THICENESS DETE NT PRODUCT CODES BATCE # METHOD R/M( F)4K!N. (ins.) APPLIE3 1 Ras I Brush 70 F/48% 200. ft / gal. 12/8/77 2 NUTEC 6113 , 3386/3388/LB149 Squeegee 58 F/38% .015 .025 12/10/77 First day curing temperature ranged from 28-58 F.

5. M URING DATA:

AMBIENT TEMP.

  • 70-90 F REL. HUMIDITY: 45-60 % MIN. CURE TI.E 5 DAYS
6. TEST PROCEDURE: Bechtel Standard CP-954 and A.N.S.I. N-5.12
7. TEST RESULTS:

7.1 ABRASION

Federal Test Method Standard 141 Test Method 6192, 1000 cycles with a CS-17 Wheel and a 1000 gram lacd.

IM - N/A HIGH - N/A AVERAGE - N/A

7.2 ADEESION

Determined by use of the ELCOMETER ADEESION TESTER

... 650 psi 7.3 DIRECT IMPACT RESISTANCE: N/A i

1 APPRO r 7 -

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TEST REPORT NO. 249-[8-G

{ PREPARED BY: 4.Ih C.

i DATE: 4/78 l I  :

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DBA AND RADIATION TOLERAA f * -

  • EST PANEL PREPARATICN DATA I L

O PRODUCT TU BE TESTED: NOTEC #11S/REACTIC #1201 2- TYPE SUBSTRATEs_ Concrete SIZE: 2"'x 4" x 2"

3. StmFACE PREPARATION (Describe): Sandswept with Crosblast #4 blasting sand.

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4'. PM3 DUCT DATA: SAMPLE W. (s) : 3795

  • L. 1 DAM AND TIME CDRING CGtPCOND CR PRIMER APPLIED: 12/8/77 -

1 PM3 DUCT APPLICATION CONDITIONS COAT PN3DOCT MICENESS TIME & DATE

_ CODES BATCH # METIE3D R/M(CF) %R.E. ' ' (ins.) APPLIED 1 RES 1 Brush 9 70Fh48% 200 f t / gal. 10/8/77 2 NUTEC ells 3386/3388/. Squeegee l 58 F/38% .015 .025 10/10/77 LB149 3 REACTIC $1201 3952/3953 Spray 62 F/664 .003. .004 3/3/78 Total Dry Film Thickness: .018 .029" -

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6. CURING CDNDITICNS: AMBIENT TEMP. 70-80 F REL. HUMIDITT 40-65 g MINIMUM CURE 8 DAYS l7". TEST PRCCEDURE: DBA per Houston Lighting & Power, Revision 0, 10/22/75 4

.8 TESTING PERFORMED BY: cm .,,3 m4 ne. Am maci a te s DA':2 SCBMIM 3/10/78 APPR3VED BY: , ,

DATE: 4/19/78 [

PREPARED BY: Id ((M_

DATE: 4/19/78 TEST REPORT NC. : ua_7a_c 4

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COASTAL SCIENCE ASSOCIA"Sr INC. -

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- - 6900 CANAL BLVD. -

1 NEW ORLEANS, LOUISIANA 70124.'

TEL. 504-283-7251 ,

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SUBJECT:

DESIGN BASIS ACCIDENT CDATINGS T' EST' REPORT.

l 4 DATE: 3/13/78

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DBA TEST CONDITIONS: ABREVhATEDHLSP(24 HOURS)

HIGHEST TEMPERATURE DURING RUN..... 307 DEG.-F. - -~ -- - - - - - -

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HIGHEST PRESSURE DURING RUN..... 58 LBS./ SG. IN.

SAMPLE NUMBER: 3795 SAMPLE TYPE: CONCRETE COUPON SAMPLE 4 DESCRIPTION -

SIDE 1: NO DEFECTS

3795 SIDE 2: NO DEFECTS.

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@;~l SIDE 3: NO DEFECTS SIDE 4: NO DEFECTS 1

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-REPORT WRITTEN FOR: SOUTHERN IMPERIAL COATINGS REPORT 4 068031 8 APPROVED BY. .... ... .... ........

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