ML20140F114

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Rev 5 to Procedure QI-QP-11.4-23, Reinsp of Seal-Coated & Finish-Coated Steel Substrates for Which Documentation Is Missing or Discrepant
ML20140F114
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 04/05/1982
From: Williams H
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20140F059 List:
References
FOIA-84-487 QI-QP-11.4-23, NUDOCS 8507080140
Download: ML20140F114 (5)
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+.dSER REVISICN PAGE p"

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QI-QP-11.4-23 5

l APR 0 5 IC32 1of5j t

i PRE?ARED BY:f Mdk!/ Ym

//z/M EE REINSPECTION OF SEIL I'

COATED AND FINISH APPROVED SY:

COATED STEEL SUBSTRATES "I

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FOR WHICH 00CUMENTATION g

APPROVED BY:

72-IS MISSING OR DISCREPANT CATE 1.0 RE~ERENCES l

1-A Nonconformance Report Numbers C-81-01370 through C-81-01373 and C-81-01567 1-B CP-QP-18.0, " Inspection Reports" 1-C CCP-30, " Coating Steel Substrates Inside Reactor Buildings and Radiation Areas" 1-0 CCP-30A, " Coating Steel Substrates Inside Reactor, Buildings and Radiation Areas"

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1-E QI-QP-11.4-1,

" Inspection of Steel Substrate Surface Preparation and Primer Application" 1-F QI-QP-11.4-5, " Inspection of Steel Substrate Primer Repair and Seal and Finish Coat Application and Repair" hh 2.1 PURPOSE AND SCOPE ( t.J g @ g h ilg d a

h u s This instruction sha11' describe methods utilized by Quality Control in the measurement of the dry film thickness (DFT) and adhesion to steel substrates of existing seal or finish coat applications described in Reference 1-A using the Mark II Tooke Gage and the Elcometer 106 Adhesion Tester respectively.

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

i 3.0 INSTRUCTION l

For each seal or finish coated steel item or component for which documentation is missing or dis:repant, the tests discussed in Paragraphs 3.1 and 3.2 shall be perfonned at the frequencies indicated therein.

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3.1 TOOKE TEST (SCRATCH TEST) j' The scratch test shall be perfomed by using a Mark II i

Tooke Inspection Gage using a 2X tip.

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l A daily confidence check shall be perfomed to insure accuracy n.:

of the Tooke Gage.

The gage shall be inspected for damage, tip ware and a scratch shall be made with the Tooke Gage and compared to a reading obtained using a calibrated Elecmeter

.R Inspection DFT Gage or equivalent.

The reading obtained with the 2X tip of the Tooke Gage shall not vary by more than t 0.5 mils from that obtained with the Eciometer i

Inspection DFT Gage.

Five separate Tooke readings spaced evenly over each eal or 5

finish coated item (See Note 1) shall be taken.

Dry film thickness shall be as follows:

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Any Single Reading of Five j

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l CZ 11 Primer 1.5 - 5.5 2.0 - 5.5 l

06 1.5 - 5.5 2.0 - 5.5 i

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Total Coating System 7.0 - 11.5 7.0 - 11.0 I

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j; In the event that any reading (s) is found to be outside of j

the acceptable ~ primer thickness range, additional readings j

i shall be taken to detemine the extent of the unacceptable "i

area.

Dimensions and locations of unacceptable areas and 9

results of additional testing shall be. documented 'in the

" Remarks" section of Attachment 1.

.7 NOTE 1:

For small areas of seal or finish coated surfaces, l

five separate readings shall be 'taken. For items with less than 5 square feet of exposed coating, a minimum of three separate readings shall be T..

taken.

For larger seal or finish coated areas

{i such as containment liner plate, five separate readings randomly spaced shall be taken for each j

a-100 square feet of coating, j

NOTE 2:

Seal or finish coated surfaces meeting the i

following descriptions shall not be subject to i

l testing with the Tooke gage:

a.

Areas or items which are inaccessible due to l

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l installation of pemanent items or equipment.

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INSTRUCTION I ISSUE i

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lA TEXAS UTILITIES GENERATING CO.

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QI-QP-11.4-23!

5 lAPR 0 5 1982 3 of 5 i.

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b.

Items that due to their size or configuration will not accomodate testing with a Tooke gage.

c.

Areas or itens which have acceptable Primer Records shall' be tested with a Eclometer Inspection DFT Gage or equivalent for total 4

system.

p 3.2 ADHESION (PATCH) TEST I

The QC inspector shall perfom an Adhesion (Patch) Test on

,i each seal or finish coated item (See Note 1). A calibrated Elcometer 106 Adhesion Tester shall be used to verify that the minimum acceptable tensile strength of adhesion of the j*

l' coating systen to the steel substrate has been attained.

Each test shall consist of three individual dollies tested d

l to failure. (See Note 2 and 3 below.)

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l NOTE 1:

For larger seal or finish coated areas such as s

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containment building liner plate, the Inspector fj shall perfom one test for every 500 square feet b

of coating.

A yj NOTE 2:

For items with total exposed surface area of 10 t

j square feet or less, each adhesion test shall i

consist of only one dolly tested to failure.

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NOTE 3:

Seal or finish coated surfaces meeting the following descriptions shall not be subject to adhesion testing:

i a.

Areas or items which are inaccessible due to installation of pemanent items or equipment.

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b.

Items that due to their size or configuration i;

will not accomodate testing with an Elcometer i

5 106 Adhesion Tester.

1 Acceptance Criteria:

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The minimum acceptable strength per dolly shall be 200 psi, l

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

following additional adhesion testing shall be perfomed:

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On large surface areas such as liner pl a te,- four j

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additional dollies shall be adhesion tested at a

approximately' one foot from the failing dolly and l

i spaced radially at approximately 90 degree intervals.

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I INSTRUCTION ISSUE REVISION PAGE l

NUM8ER DATE i TEXAS UT!UTIES GENERATING CO.

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,QI-QP-11.4-23 5

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2)

On components with smaller surface area such as miscellaneous steel or supports (conduit, cable tray, or pipe),

two additional dollies shall be adhesion tested at one foot or less from the failing dolly with

.one located on each side of it.

If any of the additional dollies should fail the minimum strength criteria, the test results shall be promptly reported to Civil Engineering for evaluation and resolution.

Test results on the additionai dollies shall be documented in i

the "Ramarks" section of the IR.

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NOTE 4:

In the case in which all of the additional dollies pass the minimum strength criteria, test failures on any of the original three dollies I

shall still be documented as " unsatisfactory" on the IR.

x.S 3.3 DOCUMENTATION

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g Results of, inspections per Paragraphs 3.1 through 3.2 shall be documented on Inspection Report.

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accordance with Reference-1-8.

The completed IR shall be i

y'l forwarded to the PPRV for retention.

For inspections of

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coated containment liner surfaces,

the Inspector may document one IR for each 500 square feet of surface area.

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3.4 REPAIRS e

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Repairs of e'ach coating area either scratch-tes'ted or d*

adhesion tested shall be perfonned in accordance with l

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Reference 1-C or 1-0 and reinspection of repaired coatings shall he in accordance with Reference 1-F.

3g 3.5 MAPPING OF LARGE AREAS

,i For large areas (such as ' reactor containment liner. plate)

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each IR No. and the inspection area to which the IR l

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corresponds shall be indicated on the map drawing.

The map drawing shall be maintained by the QC' Supervisor, l

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}s or his designee, until the entire surface has been inspected as required. Completed map drawings shall be transmitted to I

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the Permanent Plant Records Vault.

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i STRUCTION REVISlyg ISSUE PAGE NUMBER DATE TEXAS UT!UTIES GENERATING CO.

CPSES QI-QP-11.4-23 5

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