ML20140F151

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Rev 6 to Procedure QI-QP-11.4-24, Reinsp of Protective Coatings on Concrete Substrates for Which Documentation Is Missing or Discrepant
ML20140F151
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 07/14/1983
From: Williams H
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20140F059 List:
References
FOIA-84-487 QI-QP-11.4-24, NUDOCS 8507080166
Download: ML20140F151 (5)
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INSTRUCTION ISSUE gTEXAS UTILITIES GENERATING CO. NUMBER REVISION DATE EAOI

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QI.QP 11.4 24 6 l 1 of 5 I JUI.14 IS83

, i REINSPECTION OF PREPAREDBY:/ y/),/s ~

,6 y[/g DATE PROTECTIVE COATINGS ON CONCRETE SUBSTRATES APPROVED BY: ~

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FOR WHICH DOCUMENTATION 4 IS MISSING OR DISCREPANT APPROVED BY: / [

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REFERENCES

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1-A Nonconformance Report Numbers C-81 01613 and C-81 01823 18 ,, CP QP.18.0, " Inspection Reports" 1.C CCP.40, " Protective Coating of Concrete Surfaces" 10 QI.QP.11.4<10, " Inspection of Concrete Substrate Surface le Preparation and Coatings Application and Repair" ,.

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,,5 1.E CP.QP.15.0, " Tagging System" , . [-/.? :@. P v y .. ' .'

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[ 2.0 GENERAL r i " r',. J v~j s'a #,

.c 2.1 PURPOSE AND SCOPE b

V This instruction shall describe methods to be utilized by

,- Quality Control in the measurement of dry film thickness 6 (DFT) and adhesion to concrete substrates of existing

,y concrete coating applications described in Reference 1.A  !

[ , using the Mark II Tooke Gage and the Elcometer 106 Adhesion j

.ij Tester respectively. The above tests are destructive in nature which will necessitate a repair of the coating system e at each test location.

[ 3.0 INSTRUCTION For all coated concrete surfaces for which documentation is missing or discrepant, the inspection activities discussed in Paragraphs 3.1 through 3.2 shall be performed as

. indicated therein.

3.1 TOOKE TEST (SCRATCH TEST)

The scratch test of the REACTIC 1201 finish coat shall be perforTned using a Mark II Tooke Inspection Gage equipped I. with a 2x tip. Five separate readings spaced randomly over

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i INSTRUCTION REVISION I

PAGE I-* , TEXAS UTILITIES GENERATING CO. NUMBER l CPSES i QI.QP 11.4 24 6 g g 1983 2 of 5 t,

R a each finish coated area of 100 square feet or less shall be

taken.

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, NOTE: Tooke tests are not required to be perfonned on areas of concrete which have not been finish

.'2 coated with REACTIC 1201.

51 g Acceptance Criteria

The acceptable range for dry film thickness of the REACTIC 1201 finish coat is 3 mils minimum and 16 mils maximum.

/ In the event that any reading (s) is found to be outside of the acceptable finish coat thickness range, additional readings shall be taken to determine the' extent of the

unacceptable area. Results of additional testing shall be 3 documented on Attachment 1.

g In the event that the average of the area is, unacceptable due to unacceptable spot readings, the unacceptable spots shall be isolated as described above. Additional spot j readings shall be taken equal to the number of unacceptable

$ spot readings and the average recalculated. Results of these h1 additional readings shall be documented in the "Rema rk s" dj area of the IR. If the recalculated average is acceptable, y the IR shall be so narked with an explanation in " Remarks" Ev stating that " average recalculated - now accep tabl e", or X wording to that effect. If the recalculated average is-4 unacceptable, the unacceptable spots shall be isolated 2 (as described above) and the above re. averaging process j '. repeated.

f lt 3.2 ADHESION (PATCH TEST)

The QC Inspector shall perform an Adhesion (Patch) Test on d each 500 square feet or less of concrete surfaces which have 2- been previously coated with surfacer only (NUTEC 11 or 11S) or with surfacer and finish coat (REACTIC 1201). A

ca'librated Elcometer 106 Adhesion Tester shall be used to verify that the minimum acceptable tensile strength of A adhesion of the coating to the concrete substrate has bee 0

/ ob tained. For test areas of 300 square feet or less, eact; test shall consist of three (3) dollies randomly spaced and

.; tested to failure. For test areas greater than 300 square

, feet but less than or equal to 500 square feet, each test

.; shall consist of one (1) dolly tested to failure for each 100 square feet or fraction thereof.

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INSTRUCTION REVISION ISSUE PAGE NUMBER DATE TEXAS UTILITIES GENERATING CO.

o- QI.QP.11.4 24 6 y4 3 of 5 EXAMPLES: 1. For test area of 450 square feet, test J 5 dollies to failure.

O 2. For test area of 350 square feet, test 4 dollies to failure.

3. For test area of.100 square feet, t.est 3 dollies to failure.

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Acceptance Criteria:

The minimum acceptable strength per dolly shall be 200 psi.

If a dolly should fail the minimum strength criteria, the '

following additional testing shall be performed:

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Four (4) additional dollies shall be adhesion tested at approximately one foot from the failing dolly and spaced radially at approximately 90 degree' intervals. If any of

(- the additional dollies fail the minimum strength criteria, additional dollies shall be .placed and tested as indicated

above, until area of loss of adhesion is isolated; this f.' area (s) shall be removed to the substrate, and new coatings 0 applied in accordance with Reference 1.C.

Q NOTE 1: In' the case in which all of the additional dollies pass the minimum strength criteria, test failures 1 on any of the original three (3) dollies shall

$ nevertheless be cocumented as " unsatisfactory" on

." thd IR.

N 3.3 STATUS INDICATORS

" During backfit activities when items are unsatisfactory and could inadvertently be recoated wi th . the unsatisfactory s condition remaining, a reject tag shall be used in accordance with Reference 1.E. A reject tag shall be placed on the

!j ' area referencing the unsatisfactory Inspection Report number j,

and applicable NCR number.

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'. 3.4 REPAIRS l

l Repairs of each ~ coated area which has been destructively tested per Sections 3.1 and 3.2 shall be perfonned in accordance with Reference 1.C and inspected in accordance

_! with Reference 1.D.

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k INSTRUCTION ISSUE PAGE

' REVISION TEXAS UTILITIES GENERATING CO.

CPSES QI.QP.11.4 24' 6 4 of 5 4

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. 3.5 DOCUMENTATION Results of all inspections; described in Sections 3.1 through 3.2 shall be documented on an Inspection Report, Attachment i

2 1, in accordance with Reference 1.B.

1 3.6 MAPPING ,

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For each IR generated in accordance with Section 3.4, a sketch shall be attached to indicate the location and size of the

' applicable coated concrete aiea (See Note 1). The individual

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sketches from each IR shall be used to prepare composite maps which shall cover _ in , scope a specific room, compartment, quadrant, or cavity within th5 Reactor Containment Buildings.

i The IR number shall be transferred to the applicable area on

? the composite map in order to provide traceability to the. IR.

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_ The composite maps shall be maintained by the QC Supervisor, or his designee, until all surfaces applicable to this

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- instruction within a given area have been reinspected and a inapped. Each completed ccitposite map shall be transmitted

' to the ?cnnanent Plant Records Vault.

NOTE 1: The following parameters (as necessary) should be considered for descriptions of test areas on the sketch.

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a. Bottom and Top Elevations (vertical and
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diagonal surfaces) or Elevation of Surface

' (horizontal surfaces),

b. Dimensions in relation to Azimuths, column

- S lines, reactor centerline or other components

- of known location.

c. Whether concrete substrate is wall, ceiling, floor, beam or, column.
d. Quadrant, compartment, cavity or room in

. which inspection area is located.

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- e. Unit number.

f. Rel .stion of surface to Cardinal Directions (i .e. North, South, etc. ) .

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INSTRUCTION REVISION ISSUE PAGc-

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TEXAS UTILITIES GENERATING CO.

CPSES  ! l QI-QP-il.4-24 6 JUL 141583 5 of 5 I

ATTACHMENT 1

! . COMANCHE PEAK STEAM ELECTRIC STATION INSPECTION REPORT je ,

arts otsant:ca .cu r . car.ca no. ar PROTECTIVE COATINC, _

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inseECTion ATraisurEs g j o.rt.l ,,,*c ut I O SURFACER ONLY OFINISH Cf1AT l ll l i I . Iii  !

'! 1. I Perfem Tooke test oer Para. 3.1 to detemine tnickness l l1 l

  • l in mils of finish coat. (Occument cne set of readings l l l l

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l for each 100 square feet or .ess.) l l l l j I RECCRD: l l l l I i 1 2 3 4 5 I II i .

I Min. crT I III i

', i Max. CFT i l l l I i Avg. CFT l l l 1l l

[ I l 1 l' l l Circle individual unacceptable readings. l -l l l 1 I I lI i

2. l Perform Adhesion Test per Para. 3.2. (Occument three l ll l l readings for esen 300 so. f t. or less. Document one l l l addf tional reading for each 100 sq. f t. or fraction l l.l l thereof in excess of 300 sq. f t.) l l l l cou.Y #1: I II I I Ocu.Y #2: 1 II i
  • I cou.Y 43: l I l l cou.Y es: l l 00u.f e5: y l

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