ML20140F155

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Rev 7 to Procedure QI-QP-11.4-24, Reinsp of Protective Coatings on Concrete Substrates for Which Documentation Is Missing or Discrepant
ML20140F155
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 04/18/1984
From: Britton N
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20140F059 List:
References
FOIA-84-487 QI-QP-11.4-24, NUDOCS 8507080170
Download: ML20140F155 (5)
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- r INSTRUCTION l ISSUE gTEXAS UTIUTIES GENERATING.C"3. NUMBER REVIS1 N DATE PAGE j

!- CPSES l

' 4 QI-QP-11.4-24 7 b 'l of 5 l

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lAPR18 E34, l f PRE?ARED BY: W92I d -/7-flg- -

REINSPECTION OF f 3~ ,Ayg 3

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ON CONCRETE SUBSTR Wcs APPROVED BY: M48 'O-

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L FOR WHICH DOCUMENTATION .- OATE I

IS MISSING OR DISCREPANT / j

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1.0 REFERENCES

FOR E0r6 EON E.Y 1-A QI-QP-11.4 "Use of the Elcometer Mhesion Tester for l l ,

, Isolating ble Coating Adhesion' .

1-B CP-Q P-18. pe

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1-C CCP-40,'" Protective Coating 01"'Concrece 5 f_

i 1-0 QI-QP-11.4-10 " Inspection of Concrete Substrate Surface l Preparation and Coatings Application and Repair" l I

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1-E CP-QP-15.0, "Taaging Systen" 1-F -QI-QP-11.4-27, " Inspection of Concrete Substrate Su rface

_ Preparation and Coatings Application and Repair"

2.0 GENERAL I

i 2.1 PURPOSE AND SCOPE This instruction shall describe me: hods to be utilized by  ;

, Quali ty Control in the measurement of dry film thickness j (DFT) and adhesion to concrete .substrates of existing .

, '= concrete coating applications using the Mark II Tooke Gage j and the Elcaneter 106 Adhesion Tester respectively. The '

~above tests are destructive in nature which will necessitate a repair of the coating systen at each test location.

3.0 INSTRUCTION ,

For' all coated concrete surfaces for which documentation is  !

mi:nng or discrepant, the inspection activities discussed j in Paragraphs 3. i~ through 3.2 shall be perfo med as ind,1cated therein. l t

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HUGE 84--487 PDR l 4

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'k .- , h -l INSTRUCTION "E / ISSUE N

ER DATE TEXAS UTIUTIES GENE'AbNG CO. '

CPSES QI-QP-11.4-24 7 Apg y 3 jgg4 2 of 5 r

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3.1 TOOKE TEST (SCRATCH TEST)

The - scratch test of the NUTEC 1201 finish coat shall be l performed using a Mark II Tooke Inspection Gage equipped 1 with a 2x tip. Five separate readings spaced randomly over each finish coated area of 100 square feet or less shall be -

taken.-

t i NOTE: Tooke tests are not required to be perfonned on areas of concrete which have not been fini'sh coated'with NUTEC l'201. l Acceptar$ce Criteria The acceptable range for dry film thickness of the NUTEC l 1201 finish coat is 3 mils minimum and 16 mils maximum. .

In the event that any reading (s) is fou'nd to be outside of the acceptable finish coat thickness range, additional

! readings shall be taken to detennine the extent of the unacceptable area. Results of additional testing shall be

( docunented on Attachment 1. This area (s) shall be repaired 4  : in accordance with Reference 1-C..

3.2 ADHESION (PATCH TEST)

The QC Inspector shall perfona an Adhesion (Patch) Test on i each 500 square feet or less of concrete surfaces which have been previously coated with surfacer only (NUTEC 11 or 115) or with surfacer and finish coat (NUTEC 1201). A Ta'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. For test areas greater than 300 square l

feet but less than or equal to 500 square feet, each test shall consist of one -(1) dolly tested for each 100 square feet or fraction thereof. Adhesion testing shall be

.performed in accordance with Reference 1-A. ,

.. EXAMPLES: 1. For test area of 425 square feet, tes t

. 5 dollies. l 4

2. For test area of 350 square feet, test 4 dollies. l
3. For test area of 100 square feet, test 3 dollies. l Amme ma6 i TUGCQ CA ,

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, . '! FROCEDURE REVISION PAGE

- NUMBER DATE TEXAS UTILITIES GENERATING CO.

'CPSES QI-QP-11.4-24 7 M 13 1984 3 of 5 M

Acceptance Criteria:

The minimum acceptable strength per dolly shall be 250 psi.'

If a dolly should fail the minimum strength criteria, the

.: - following additional testing shall be performed:

Four (4) additional dollies shall be adhesion tested at

- approximately one foot from the failing dolly and spaced radially at approximately 90 degree intervals. If any of the additional dollies fail the minimum strength criteria, additional dollies shall be placed and tested as indicated above, until area of loss of adhesion is isolated; this area (s) shall be removed to the substrate, and new coatings applied in accordance with Reference 1-C.

NOTE 1: " In the case in which all of the additional dollies

- pass the minimum strength criteria, test failures on any of the original three (3) dollies shall nevertheless be docmented as " unsatisfactory" on

( the IR.

3.3 STATUS INDICATORS During backfit activities when items are unsatisfactory and could inadvertently be recoated with the unsatisfactory condition remaining, a reject tag shall be used in acconiance with Reference 1-E. A reject tag shall be placed on the

" area referencing the unsatisfactory Inspection Repoct neber 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 accordance with Reference 1-0 or 1-F as applicable.

3.5 DOCUMENTATION Results of all inspections described in Sections 3.1 through 3.2 shall be documented on an Inspection Report, Attachment 1, in accordance with Reference 1-B. .,

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ISSUE (I,

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. TEXAS UT1UTIES GENERA dG CO.

,' ; CPSES QI-QP-11.4-24 7 APR18 534 4 of 5 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 applicable coated concrete area (See Note 1). The individual sketches from 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 ntaber 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 l Each completed composite map shall be transmitted mapped.

to the Pennanent Plant Records Vault.

NOTE 1: The following parameters (as necessary) should be considered for descriptions of test areas on the sketch.

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. Quad rant, compartment, cavity or roan in which inspection area is located.
e. Unit nunber.
f. Relation of surface to Cardinal Directions (i.e. North, South, etc.).

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INSTRUCTION ISSUE NUMBER REV!SION PAGE DATE TEXAS UTILITIES GENERATING CO.

CPSES

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QI-QP-11.4-24 7 . APR18 E34, 5.of 5

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ATTACHMENT 1 ,

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CouAalCHE PEAK STEAad C.ECTMic STATION 'S

'; w s INSPECTION REPORT = ,. , g,

.1 IrERI GE3CJuFr43p iSEA rePEATest MG. s3T3iDA / ITNUCTwA L .'E3.Ghar.'A .

PROTECTIVE COATING ,J ,j .

EMEr JbC. NW. ad A W GM iL3i EA47. iGCui. MG. *

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QI-QP-11.4 24. Rev. , ,

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INSPECTION ATTR18UTES  ; h oarg smaatunt

- 1* 6 e i OsunFacta onLY O FINISH CDAT l ll l l l l I I

1. I Perfom Tooke test oer Para. 3.1 to detemine *nickness i i i l l in atts of finish coat. (Occusent one set of reactngs l l l l l for each 100 square feet or less.) l l l l l RECORD: IIl l

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'. I l l l l l l I Max. OFT l l l l l l 6 Avg. OFT l l l l l l l l l l' I Ctrele individual unacceptsble readings. l l l l l i I Z. 1 Per*cru Acheston Test per P--a. 3.2. (Document three l l l l l reedings for esca 300 so. f t. er less. Docusent one l l i l l addittenal reading for each 100 sq. f t. or fraction l l l )

l thereof in excess of 5C0 sq. ft.j l l l l l Ocu.Y #1: l l 1 1 1 00LLY #2: l l l l

! l DOLLY f3: l l l l l 00LLY #4* L l. l l Dou.f #5: yI i 1

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