ML20140F121

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Rev 4 to Procedure QI-QP-11.4-23, Reinsp of Seal-Coated & Finish-Coated Steel Substrates for Which Documentation Is Missing or Discrepant
ML20140F121
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 02/25/1982
From: Scott B
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20140F059 List:
References
FOIA-84-487 QI-QP-11.4-23, NUDOCS 8507080144
Download: ML20140F121 (5)
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INSTRUCTION ISSUE  !

gT EXAS UTILITIES GENERATING.CC. NUMBER l REVISICN DATE PAGE

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QI-QP-11.4-23 4 1 of 5 FEB 2 5 1952 l

- PREPARED .aBY: // g #- f/F A-REINSPECTION OF SEAL COATED AND FINISH COATED STEEL SUBSTRATES APPROVED BY:

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I FOR WHICH DOCUMENTATION A

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1.0 REFERENCES

l 1-A Nonconfomance Report Numbers C-81-01370 through C-81-01373 l and C-81-01567 1-B CP-CP-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

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. and Radiation Areas" 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" 2.0 5 "M

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2.1 GENERAL PURPOSE AND SCOPE N =

mlfy i ?_n m This instruction shall describe methods utilized by Quality Control in the measurement of the dry film thickness (DFT) t and adhesion to steel substrates of existing seal or finish I 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.  ;

3.0 INSTRUCTION For each seal or finish coated steel item or component for which documentation is missing or discrepant, the tests l discussed in Paragraphs 3.1 and 3.2 shall be performed at  ;

the frequencies indicated therein.

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PDR FOIA HUGEB4-487 PDR itGCC CA

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, 7, I t INSTRUCTION REVISION ISSUE

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  • TEXAS UTIUTIES GENERATING CO.

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QI-QP-11.4-23 4 FEB 2 5 tos? 2 of 5

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-- ' ,) ;TOOKE TEST (SCRATCH s 3, TESTh'

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tg- Tooke The scratch test (shtrl ;be oerfomed by using a Mark II Inspection Gage usuig a 7,X tip.

Each test made with the Tooke gage shall be compared to a a '

reading of the - total system obtained using a calibrated g Elcometer Inspection DFT gage or equivalent. The reading

, obtained with thv2X tip of the Tooke gage shalDno;; tary by

  • more than 20.5 mils from tha reading obtained ,.vith the E?c.ometer .Inspecth DFT. gage." Any Tooke gige reating which

' s is not within 0.0 dils-'of the corresponding DFTigage reading

_ shall be discarded -(An additional Tooke s

be taken for each pr*a reading discarded.) gage reading shall

% Five separ' ate Tooke reJdings spaced evenly over each seal or finish coated itdi.(See Note 1) shall be taken. Dry film thickness shall be'as follNs A,,

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hiv S?nole Readino of Five CZ IL Primer , , ( 1.5 - 5.5 '

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' 06 1 >% s 1.5 - 5.5 2.0 - 5.5 Total Coating' system 7.0 - 11.5 ' 7.0 - 11.0 In- the event the anh./ reading (si is found to be outside of g the acceptable primer thickness range, additional readings shall . be taken to determine the extent of the unacceptable a

area. Dimensions and locations of unacceptable areas and results of additional testing shall be documented in the t Ji'. Remarks" section M Attachmentil. '

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[ NOTE:1: . For smaly areas ofi r.aaFor finish coated surfaces, five,' senetzte readingt, shall be taken. For items with 'less than 0.5 square feet of exposed coating, a minf an< .of three separate -readings shall be .

takt.nY idi larger seal or finish coated areas 7 .such as containment liner plate, . five separate readings randomly spac4d shall be taken for' each

p 100 square fs,et of ccatir.g.

, NOTE 2: Seal od finish coated siirfaces meeting the

' following4 descriptionr shall l not be subject to testing witNrthe Tooke gage:

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INSTRUCTION REVISION ISSUE PAGE

. TEXAS UTILITIES GENERATING CO.

O CPSES 3 of 5 QI-QP-11.4-23 4 RS 2 5 ICC2

a. Areas or items which are inuccessible due to installation of permanent items or equipment.
b. Items that due to their size or configuration will not accomodate testing with a Tooke . gage.

3.2 ADHESION (PATCH) TEST The QC inspector shall perfonn an Adhesion (Patch) Test on 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 coating system to the steel substrate has been attained.

Each test shall consist of three individual dollies tested to failure. (See Note 2 and 3 below.)

NOTE 1: For larger seal or finish coated areas such as containment building liner plate, the . Inspector shall perfonn one test for every 500 square feet

,- of coating.

NOTE 2: For items with total expos ~ed surface area of 10 square feet or less, each adhesion test shall s consist of only one dolly tested to failure.

NOTE 3: Seal or finish coated surfaces meeting the following descriptions shall not be subject to adhesion testing: .

a. Areas or items which are inaccessible due to installation of permanent items or equipment.
b. Items that due to their size or configuration will not accomodate testing with an E1cometer 106 Adhesion Tester.

Acceptance Criteria:

The minimum acceptable strength per dolly shall be 200. psi.

If a dolly should fail the minimum strength criteria, .the following additional adhesion testing shall be performed:

1) On large surface areas such as liner plate, four additional dollies shall be adhesion tested at

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approximately one foot from the failing dolly and spaced radially at approximately. 90 degree intervals.

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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 sh6uld fail the minimum strength criteria, the test results shall be promptly reported to Civil Engineering for evaluation and resolution.

Test results on the additional dollies shall be documented in the " Remarks" section of the IR.

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

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

. 3.3 DOCUMENTATION

\- Results of inspections per Paragraphs 3.1 through 3.2 shall be documented on Inspection Report, Attachment 1 in accordance with Reference 1-B. The completed IR shall be forwarded to the PPRV for retention. For inspections of coated containment liner surfaces, the Inspector may document one IR for each 500 square feet of surface area.

3.4 REPAIRS .

Repairs of each coating area either scratch-tested or adhesion tested shall be perfomed in accordance with Reference 1-C or 1-0 and reinspection of repaired coatings shall be in accordance with Reference 1-F.

3.5 MAPPING OF LARGE AREAS For large areas (such as reactor containment liner plate)

, each IR No. and the inspection area to which the IR corresponds shall be indicated on the map drawing.

The map drawing shall be maintained by the QC Supervisor, or his designee, until the entire surface has been inspected as required. Completed map drawings shall be transmitted to the Pemanent Plant Records Vault.

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.j INSTRUCTION RWISION> o' ISSUE PAGE

.' NUMBER DATE TEXAS UTILITIES GENERATING CO.

CPSES

.^ QI-QP-11,4-23 4 FEB 2 5 1932 5 of 5 l i

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1. 1 Perfarn Toote test per cara. 3.1 to cetens1ne tt:1canessi I l j l i in ails of crimer and total systen (document one set i ! i l I s., I of findings for eacri 100 sq. ft. wnen testing Contain- l l l l i i ment liner) i i i l I

' RECORD: l i i i l i 1 -12 3 1 4 ll 5 l l l l l l Win. Soot ** mer: 1 l i I l l I Max. Soot PMmer; '

i iii l i Avg. Soot Primer: i iil i i win. Soot Tot. system: l l l l 6 l Max. Soot Tot. System: l' . l l l 1  !

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- 2. l Perform Adhesion test ser ears. 3.2. 1 i i l i l RECORD: Adhesion Test Strength in osi: 1 1 i i i Dolly 81: Colly #2: Dolly #3 I l l 1 l  ! I l l I

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TUGCC CA l Form No.t l

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