ML20140F083

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Rev 10 to Procedure QI-QP-11.4-23, Reinsp of Seal-Coated & Finish-Coated Steel Substrates for Which Documentation Is Missing or Discrepant
ML20140F083
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 08/12/1983
From: Williams H
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20140F059 List:
References
FOIA-84-487 QI-QP-11.4-23, NUDOCS 8507080100
Download: ML20140F083 (6)
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Text

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l INSTRUCMON ISSUE l 2-

_ $ gTEXAS UTILITIES GENERADNG CO. NUMBER l REVISICN CATE l PAGE g;. [

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  • g t CPSES , g 10 l 1 of 6 i

[9 l QI-QP-11.4-23 AUG 12 1983 l ,

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PREPARED BY: 3 W [ //f ~'

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REINSPECTION OF SEAL //

i C0ATED AND FINISH APPROVED BY:

/. 5 I[ /L d COATED STEEL SUBSTRATES Y

FOR WHICH DOCUMENTATION

n. IS MISSING OR DISCREPANT APPROVED BY:

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1-A lilSTORICAL FILE Nonconformance Report Numbers C-81-01370 through C-81-01373 i', j and C-81-01567

. i 1-B CP-QP-18.0, " Inspection Reports"

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

, j and Radiation Areas"

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! p't 1-D CCP-30A, " Coating Steel Substrates Inside Reactor Buildings

', and Radiation Areas" j 1-E QI-QP-11.4-1, " Inspection of Steel Substrate Surface e  !

Preparation and Primer Application"

'i 1-F QI-QP-11.4-5, " Inspection of Steel Substrate Primer Repair and Seal and Finish Coat Application and Repair" 3

_( , 1-G CP-QP-15.0, " Tagging System" ,

i 2.0 GENERAL  !

2.1 PURPOSE AND SCOPE j i

This instruction shall 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 7' coat applications described in Reference 1-A using the Mark II Tooke Gage and the E1cometer 106 Adhesion Tester i
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 excluding d.1 miscellaneous steel or ccmponent for which documentation is 8507080100 850311

- PDR FOIA HUGE 84-487 PDR T'.;GCC oA l

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CPSES AUG 121983 2 of 6 QI-QP-11.4-23 10 missing or discrepant, the tests discussed in Paragraphs 3.1 and 3.2 shall .be perfonned at the frequencies indicated therein.

NOTE: Conduit supports that the unique number is not readily visible will be documented and identified in the following manner on the IR:

1) Beginning of the run in the area to be coated by junction box numbe r, unique elevation, major equipment spin number, etc.
2) The conduit identification number.
3) The number of supports on the run in the area as defined. The Unique number of any supports on which it is readily visible.

.. 4) The termination. of the run or the boundary U of the area to be coated.

Implementation of this note shall be as directed-by the QC Supervisor and may be unique for diffierent areas of inspection.

3.1 TOOKE TEST (SCRATCH TEST)

The scratch test shall be perfanned by using a Mark II Tooke Inspection Gage using a 2X tip.

A daily confidence check shall be perfonned to insure accuracy j 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 obtained

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with the 2X tip of tne Tooke Gage shall not vary by more than 0.5 mils from that. obtained with the Eclometer 1 Inspection DFT Gage.

.. Five separate Tooke readings spaced evenly over each seal or i'. finish coated item (See Note 1) shall be taken. Dry film s thickness shall be as follows:

1 Average Any Single Reading of Five U'

CZ 11 Primer

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1.5 - 5.5 1.5 - 5.5 D6 1.5 - 5.5 1. 5 - 5. 5 Total Coating System 7.0_- 11.5 7.0 - 11.0 E

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. [J INSTRUCTION ISSUE PAGE REVISION

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' (~.. CPSES 3 of 6 QI-QP-11.4-23 10 AUG 121983 s.

a In the event that any reading (s) is found to be outside of ,

the acceptable primer thickness range, additional readings b shall be taken to detennine the extent of the unacceptable area. Dimen: ions and locations of unacceptable areas and 1

testing shall be documented on r results of additional

[y Attachment 1.

In the event that the average of the area is unacceptable 4

due to unacceptable spot readings, the unacceptable spots l

3 shall be isolated as described above. Additional spot readings shall be taken equal to the number of unacceptable spot readings and the average recalculated. Results of these

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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. recalculatec - now ' acceptable", or wording to that . effect. If the recalculated average is unacceptable, the unacceptable spots shall be isolated

  • - (as described above) and the above re-averaging process
d repeated.

I NOTE 1: For small areas of seal or finish coated surfaces, 4 five separate readings shall be taken. For items j with less than 5 s.quare feet of exposed coating, a minimum of three separate readings shall be taken. For larger seal or finish coated areas d such as containment -liner plate, five separate readings randomly spaced shall be taken for each

" - 100 square feet of coating. , ,

NOTE 2: Seal or finish - coated surfaces meeting the i'

. following descriptions shall not be subject to testing with the Tooke gage:

t 3 a. Areas or items which are inaccessible due to installation of permanent items or equipment.

., ? b. Items that due to their size or configuration i- will not accomodate testing with a Tooke gage.

I c. Areas or items which have acceptable Primer 4 Records shall be tested with a Eclometer l Inspection DFT Gage or equivalent for total system.

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id 3.2 . ADHESION (PATCH) TEST The QC inspector shall perfonn one- Adhesion (Patch) Test for every 500 sq. ft. for coating on the containment liner

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Q3 CPSES 4 of 6 y

( I-QP-11.4-23 10 AUG 12 1983

.y plate. 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 4 dollies tested to failure.

Areas or items which are iriaccessible .due to installation of

  • pennanent items or equipment.

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Acceotance Criteria

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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:

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

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.i If any of the additional dollies should fail the minimum strength criteria, additional dollies shall be placed and e

g tested in accordance with 3.2 or as applicable until area

!! of loss of adhesion is isolated. This area (s) of coating W shall be removed to the substrate, and new coatings applied 2,' in accordance with Reference 1-C or 1-D.

3.3 STATUS INDICATORS b.1 During backfit activities when items are unsatisfactory and

- could be inadvertently recoated with the unsatisfactory A condition remaining, a reject tag shall be used in accordance

'2 with Reference 1-G. A reject tag shall be placed on the

- item or area referencing the unsatisfactory Inspection Report

( number and applicable NCR.

4 3.4 00CUMENTATION 3

J Results of inspections per Paragraphs 3.1 through 3.2 shall

?.' be documented on' Inspection Repo rt, Attachment 1, in accordance with Reference 1-8. The completed IR shall be forwarded to the PPRV for retention. For inspections of

} coated containment liner surf aces , the Inspector may

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

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QI-QP-11.4-23 10 aut.i l 2 1963 5 of 6 q

.J 3x i 4 3.5 REPAIRS s

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 3 shall be in accordance with Riference 1-F.

7 3.6 MAPPING OF t.ARGE AREAS G

J For large areas (such as reactor containment liner plate) a 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
j as required. Completed map drawings shall be transmitted to q the Pennanent Plant Records Vault.

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!' CPSES QI-QP-11,4-23 10 g AUG 12 1S83 6 of 6 (G.

Attachment 1

- . Coa 8ANCME PCAN STEAM E'.ZCTMIC STATION ,

< s.ee -r IN1PECTICN REPCMT [4  ;

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l SEAL CR FINISH CCAT l I i  !  !

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1. I Perform Toote test per para. 3.1 to ceter!stne tatexnessi j 4 i  !

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4 l in siis cf orteer and total sys*m (doc:ssent one set i 1l I i jj  ?

i of readings for eaca 100 so. ft. wnen testing Contain- 1 I I I i jW l ment liner) l I I i 1

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2. I per'orn Adhesies test oer ears. 3.2. t ' I i 1

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1 I Dolly #1: Colly #2: Dolly 43 I i i i i

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