ML20140F069

Rev 12 to Procedure QI-QP-11.4-23, Reinsp of Seal-Coated & Finish-Coated Steel Substrates for Which Documentation Is Missing or Discrepant

ML20140F069
Person / Time
Site:	Comanche Peak
Issue date:	10/24/1983
From:	TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20140F059	List: ML20140F056 ML20140F063 ML20140F069 ML20140F076 ML20140F083 ML20140F090 ML20140F097 ML20140F104 ML20140F109 ML20140F114 ML20140F121 ML20140F125 ML20140F134 ML20140F139 ML20140F145 ML20140F151 ML20140F155 ML20140F161 ML20140F168 ML20140F173 ML20140F179 ML20140F185
References
FOIA-84-487 QI-QP-11.4-23, NUDOCS 8507080095
Download: ML20140F069 (6)

Text

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REVIS!CN g PAGE i TUAS UTILITIES GENERATING .CC. . BER

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QI-QP-11.4-23 12 OCT 1993 1 of 6 l .

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PREPARED BY: 3 REINSPECTION OF SEAL j'

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C0ATED AND FINISH APPROVED SY: > 6/ b 1 COATED STEEL SUBSTRATES ga7:

FOR 'alICH 00CUMENTATION f -

7 IS MISSING OR DISCREPANT APPROVED SY -

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1.0 REFERENCES

i 1-A Nonconfomance Report Numbers C-81-01370 through C-81-01373

! and C-81-01567 .

i I 1-B CP-QP-18.0, " Inspection Reports"  ;

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1-C CCP-30, " Coating Steel Substrates Inside Reactor Buildings I

{ and Radiation Areas" l I

h' 1-D CCP-30A, " Coating Steel Substrates Inside Reactor Builoings and Radiation Areas"

1-E QI-Q P- 11. 4-1, " Inspection of Steel Substrate Surface i Preparation and Primer Application" i

1-F QI-Q P-11. 4-5, " Inspection of Steel Substrate Primer Repair

! and Seal and Finish Coat Application and Repair"'

I 1-G CP-QP-15.0, "Taggi ng System" g D. 1 2.0 GENERAL i i 2.1 PURPOSE AND SCOPE l

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This instruction shall describe methocs utilized by Quality  !

Control in the rneasurement of' the dry film thickness (DFT) j and adhesion to steel substrates of existing seal or finish i coat applications on containment liner plate described in i Reference 1-A using the Mark II Tooke Gage and the Elcometer i 106 Adhesion Tester respectively. The above tests are  !

destructive in nature wnich will necessitate a repair of the  !

coating system at each spot test location. ,

3.0 INSTRUCTION i 8507000095 850311 PDR FOIA '

HUGEB4-487 PDR

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INSTRUCTION REVISION I68N PAGE

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! . _ b ' _ . _.__ . .. ._. . .. QI-QP-11.4-23 12 2 of 6 OCT 2 4 533 3.1 - TOOKE TEST (SCRATCH TEST)

. The scratch test shall be perfomed by using a Mark II Tooke Inspect. ion Gage using a 2X tip.

. A daily confidence check shall be perfomed to insure accuracy

? . . . _ . . . _. _ _ . 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 Elcometer ~

Inspection DFT Gage or equivalent. The reading cbtained with the 2X tip of the Tooke Gage shall not vary by more-than 0.5 mils from that obtained wi th the Elcometer

.l Inspection DFT Gage.

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'; . Five tests' shall be taken for every 100 square feet of coating. For areas of less than 100 square feet, frequency

'! of testing shall be as follows:

j Size of Item (Sq. Ft.) Number of Tests Required I

=!

h 100-80 80-50 5

4

., 50-10 3

, 10-3 2 3-0 1 lsI Acceptable primer thickness shall be .0015 in. to .007 in.

j No minimum topcoat thickness shall 'be specified however, the topcoat shall provide full " hiding" properties of the primer. Maximum combined thickness of primer and topcoat

. average shall be .013 in, with maximum spot check of .015 in.

! Dry film thickness shall be as follows:

Average Any Single Reading of Five CZ 11 Primer 1.5 - 7.0 1. 5 - 7. 0

D6 1.5 - 7.0 1.5 - 7.0 In che event that any reading (s) is found to be outside of ,

i the acceptable primer thickness ranga, additional readings l l' shall be taken to detemine the extent of the unacceptable  :.

1 area. Dimensions and locations of unacceptable areas and results of additional testing shall be doctmented on Attachment 1. .

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NUMBER TEXAS UTILITIES GENERATING CO. -. .

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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. Addi tional spot readings shall be taken equal to the number of unacceptable spot readings and the average recalculated. Results of these additional readings shall be documented in the " Remarks"

area of the IR. If the recalculated average is acceptable, the IR shall be so marked with an. explanation in " Remarks" stating 'that " average recalculated - now acceptable", or wording to that effect. If the recalculated average is unacceptable, the unacceptable spots shall be i solated (as described above) and the above re-averaging process repeated.

NOTE: Seal or finish coated su rfaces meeting the following descriptions shall not be subject to '

, , testing with the Tooke gage':

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

4 C' b. Items that due to their size or configuration will not accanodate testing with a Tooke gage.

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c. Areas or items which- have acceptable Primer Reconis snall be tested with a Eclometer

Inspection DFT Gage or equivalent for total R system. ,

i 3.2 ADHESION (PATCH) TEST i

The QC inspector shall perfonn one Adhesion (Patch) Test for

every 500 sq. ft. for coating on the contcinment liner i plate. A calibrated Elcometer 106 Adhesion Tester shall be

? used to verify that the minimum acceptable tensile strength l of adhesion of the coating system to the steel substrate has I been attained. Each test shall consist of three individual j dollies tested to failure.

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i 4 Areas or items which are inaccessible due to installation of j permanent items or equipment.

Acceptance Criteria:

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

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QI-QP-11.4-23 12 007 2 4 sp s.__..

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

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Four addi tional dollies shall be adhesion tested at approximately one foot from the failing dolly and spaced radially at approximately 90 degree intervals.

i i If any of the additional dollies should fail the minimum I

strength criteria, additional dollies shall be placed and

.; tested in accordance with 3.2 or as applicable until area

. . of loss - of adhesion- is isolated. This area (s) of coating 7

shall be removed to the substrate, and new coatings applied j in accordance with Reference 1-C or 1-0.

T 3.3 STATUS INDICATORS During backfit activities when items are unsatisfact'ory and could be inadvertently -recoated with the unsatisfactory c

7 condition remaining, a reject, tag shall be 'used in accordance j .with Reference 1-G. - A reject tag shall be placed on the

{"- item or area referencing the unsatisfactory Inspection Report

.' number and applicable NCR.

9 fi 3.4 DOCUMENTATION i

4 Results of inspections per Paragraphs 3.1 through 3.2 shall j be documented on Inspection Report , Attachment .1, in accordance with Reference 1-B. The completed IR shall be t

$ forwarded to the PPRV for retention.- For inspections of 3 coated ' containment liner surfaces, the ' Inspector. may document one IR for each 500 square feet of surface area.

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I 3.5 REPAIRS 7

3 Repairs of each coating area either scratch-tested or i adhesion tested shall be perfonned in accordance with 4 Reference 1-C or 1-0 and reinspection of repaired coatings

-2 shall be in accordance with Reference 1-F.

5 i 3.6 MAPPING OF !.ARGE AREAS 4

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

C each IR No. and the inspection area to which the IR  ;

q corresponds shall be indicated on the map drawing. j zj b

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INSTRUCTION ISSUE PAGE RWISION DATE NUMBER

~~ TEXAS UTILITIES GENERATING CO.

~ ~ cPSES 12 5 of 6 QI-QP-11.4-23

,3CT 2 4 1933 y

The map drawing shall be maintained by the QC Supervisor, or his designee, until the entire surface has been inspected as requi red . Completed map drawings shall be transmitted to the Permanent Pl' ant Records Vault.

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. QI-QP-ll.4-23 12 QCT 2 4t cy 6 of 6 S

Attachment 1 COM AN CNE PEAK STEAM E.fCTRIC STAT lCN w v

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.. AS-31 .I , CI-CP-11.4-23. Rev. J ,1 a

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J. - 1. t Perform Tocue test per para. 3.1 to detentine thicxnessi i !  ;  !

s .., . s I in ails of mMmer and total systen (document one set i I f I l i of readings for eaca 100 so. ft. =nen testing Contain- i i f I

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I RECRD: Adhesion Test Streecta in esi: I li i  !

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