ML20140F168

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Rev 4 to Procedure QI-QP-11.4-24, Reinsp of Protective Coatings on Concrete Substrates for Which Documentation Is Missing or Discrepant
ML20140F168
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 03/01/1983
From: Williams H
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20140F059 List:
References
FOIA-84-487 QI-QP-11.4-24, NUDOCS 8507080182
Download: ML20140F168 (5)
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q REVISICN

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I IQI-QP-11.4-24l 4 MAR 01 ISE3 !

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PREPARED BY: gad d_/r

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REINSPECTION OF .

PROTECTIVE COATINGS APPROVED BY:

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. ON CONCRETE SUBSTRATES

' FOR WHICH DOCUMENTATION I / GA i:: / .

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1 IS MISSING OR DISCREPAN1' /

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1.0 REFERENCES

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, 1-A Nonconformance Report Numbers C-81-01613 and C-81-0182}  ;

1-B CP-QP-18.0, " Inspection Reports"  !

! 1-C CCP-40, " Protective Coating of Concrete Surfaces" ,

1-0 QI-QP-11.4-10 " Inspection of . Concrete Substrate Surface  !

Preparation and Coatings Application and Repair" 7.9 ?5$ [ f 2.0 GENERAL 5 2.1 PURPQSE AND SCOP a

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. Th1s instruction shall describe methods to be utilized by

Quality Control in the measurement of dry film thickness i (DFT) and adhesion to concrete substrates of existing j O concrete coating applications described in Reference 1-A

-- using the Mark II Tooke Gage and the E1cometer 106 Adhesion Tester respectively. The above tests are destructive in nature which will necessitate a repair of the coating system at each test location.

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! 3.0 INSTRUCTION f I

For all coated concrete surfaces for which documentation is missing or discrepan.t. the inspection activities discussed l

, in Paragraphs 3.1 through 3.2 shall be perfomed as

, indicated therein.

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HUGE 84-487 PDR

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INSTRUCTION lSSUE

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PAGE TEXAS UTILITIES GENERATING CO.

QI-QP-11.4-24 4 MAR 01 1o33 2 of 5

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t 3.1 TOOKE TEST (SCRATCH TEST)

The scratch test of the REACTIC 1201 finish coat shall be performed using a Mark II Tooke Inspection Gage equipped with a 2x tip. Five separate readings spaced randomly oter each finish coated area of 100 square feet or less shall be taken.

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

coated with REACTIC 1201.

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- 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 documented in the " Remarks" section of Attachment 1.

3.2 ADHESION (PATCH TEST)

The QC Inspector shall perfom an Adhesion (Patch) Test on each 500 square feet or less of concrete surfaces which have

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been previously coated with surfacer only (NUTEC 11 or 115)

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. 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 adhesion of the coating to the concrete substrate has been obtained. For test areas of 300 square feet or less, each

. 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.

EXAMPLES: 1. For test area of 450 square feet, test 5 dollies to failure.

2. For test area of 350 square feet, test 4 dollies to failure.
3. For test area of 100 square feet, test 3 dollies to failure.

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q INSTRUCTION REVISION ISSUE 1 ^ PAGE TEXAS UTILITIES GENERATING CO.

^ CPSES t

QI-QP-11.4-24 4 h1AR 01 1583 3 of 5 l

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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 s following additional testing shall be performed:

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

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

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

NOTE 1: In the case in which all of the additional dollies j~ pass the minimum strength criteria, test failures s

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on any of the original three (3) dollies shall nevertheless be documented as " unsatisfactory" on j,- the IR.

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. 3.3 STATUS INDICATORS During backfit activities when items are unsatisfactory and

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could inadvertently be recoated with the unsatisfactory i^ condition remaining, a hold tag shall be used. A hold tag shall be placed on the area referencing the unsatisfactory ,

Inspection Report number and applicable NCR number.

3.4 REPAIRS Repairs of each coated area which has been destructively tested 'per Sections 3.1 and 3.2 shall be performed in accordance with Reference 1-C and inspected in accord?.nce 9 with Reference 1-0.

3.5 00CUMENTATION Results of all inspections described in Sections 3.1 through 1.2 shall be documented on an Inspection Report, Attachment 1, in accordance with Reference 1-B.

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  • INSTRUCTION ISSUE i NUMBER SION DATE AGE

. TEXAS UTILITIES GENERATING CO.

! -i QI-QP-11.4-24 4 f.!AR 0 1 iS33

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3.6 MAPPING For each IR generated in accordance with Section 3.4, a sketch shall be attached to indicate the location and size of the applicablecoatedconcretearea(SeeNote1). The individual sketches fra each IR shall be used to prepare composite maps which shall cover in scope a specific room, compartment, quadrant, or cavity within the Reactor Containment Buildings.

The IR number shall be transferred to the applicable area on the composite map in order to provide traceability to the IR.

The composite maps shall be maintained by the QC Supervisor, or his designee, until all surfaces applicable to this instruction within a given area. have been reinspected and mapped. Each completed compos,ite map shall be transmitted to the Pemanent 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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J. a.- Bottom and Top Elevations (vertical and diagonal surfaces) or Elevation of Surface (horizontal surfaces).

b. Dimensions in relation to Azimuths, column 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,
e. Unit number.
f. Relation of surface to Cardinal Directions (i .e. North, South, etc.) .

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INSTRUCTION ISSUE PAGc SlON NUMBER DATE .

TEXAS UTILITIES GENERATING CO.

CPSES QI-QP-il.4-24 4 MAR 01 icd 3 5 of 5 l

ATTACHMENT 1 l COM AN CHE PEAK STEAM ELECTRIC STATICN

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4 INSPECT 1CN ATTRf80TES 1

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1. I Perfons Tooke test eer Para. 3.1 to detemine thickness i il 1

- l in mils of fintsn coat. (Occument one set of reactngs l } l l I for each 100 souare feet or less.) l l l l 1 RECORD: 1 Ii l l

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2. l Perfore Adhesion Test per Para. 3.2. (Occureent three l l { l 1 readings for e4cn 300 so. f t. or less. Occument one l l 6 ( -

l addittenal reading for each 100 so, f t. or f raction l l l ) '

l thereof in excess of 360 sa. f t.4 l l l j l DOLLY #1: I I I ) l l OCLLY 82: I l l t l DOLLY #3: 1 i l l l 00LLY #4 l l l l 6 GCLLt e5: p. l l l 0 !l l I a aa= io a,mes. cru i

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