TXX-4260, Forwards Responses to Addl Questions Re Protective Coating Allegation 21 Per 840727 Memo
| ML20107C424 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/14/1984 |
| From: | Fikar L TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20106F959 | List: |
| References | |
| TXX-4260, NUDOCS 8502210310 | |
| Download: ML20107C424 (34) | |
Text
. Enclosura A TEXAS UTILITIES GENERATING COMPANY
- MYW 4Y Tf1WER
- SelG NE)RTH flLIVE STREET. L.B. 91
- DALLA 4. TEL49 73204
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August 14, 1984 TXX-4260 i
Dockets: 50-445 50-446 fir. Thomas A. Ippolito Project Director for Comanche Peak Divis.fon of Licensing l U.S. Nuclear Regulatory Comission Washington, D.C. 20555 "C0t'ANCHE PEAK STEAli ELECTRIC STATION
! UNITS 1 AND 2 l ADDITIONAL QUESTIONS RELATIVE TO PROTECTIVE l COATINGS ALLEGATIONS FILE NO. 906.1, 10010
Dear Mr. Ipnolito:
Attached find our detailed resoonse to your additional cuestions relative to protective coating allegation No. 21 (as fomalized in your memorandum of July 27,1984). The balance of our detailed responses will be sub-mitted in the near future.
Please let us know if we can nrovide any additional infomation.
Sincerely, M
L. F. Fikar 8502210310 850213 PDR ADOCK 05000445 .'
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TIX-4260 August 14, 1984
' QUESTIONS RELATIVE TO ALLEGATION NO. 21 A. Adhesion Tests At the July 11, 1984 site meeting, CPSES briefed the NRC Coating Allegation Team members on the overall scope of the Coating Backfit Program. R. Tolson (TUCCO) informed the team of a discrepancy in calibrating Elcometers used for the coating adhesion test that was discovered after most of the Backfit Program adhesion tests were completed. This discrepancy would allow in-plant test results to be in error by 200 psi in the non-conservative direction.
CPSES should revise and correct the original adhesion test data based on dead weight calibration records for each E1cometer used to provide the original test data. The corrected data should then be statistically re-evaluated to establish' the fraction .(1) of total coated area that passes the 200 psi acceptance level with the stated confidence level. This re-evaluated data should be separately reported for: concrete, containment liner and miscellaneous steel. Describe the method and basis for re-constituting the original test data and establishing the confidence level. Also, describe how the area fraction was established.
In providing the above requested information, the following specific
. information should be supplied.,
- s. For each adhesion test sample area in which at least one test reading is below 400 psi, provide:
-1. All test readings for the sample area. If sample area is reworked, give test readings before and after repair.
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TIX-4260 August 14, 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 21
- 2. PCR numbers for all adhesion tests, the area sampled (e.g., 100 ft2), date and Elcometer number.
- 3. Calibration readings for that Elcometer at nearest calibration dates before and after testing the sample area.
- 4. Corrected readings for the sample area (Field reading - largest positive deviation during calibration period).
b.' For each Elcometer used in the Backfit program, provide a table or curve showing calibration deviations (at the 200 psi point value) as a function of date for the, complete Backfit period. .In case the instrument zero required adjustment show deviations before and af ter adjustment.
- c. For each of the three surface types, containment liner surface, concrete surfaces and miscellaneous steel surfaces, provide:
- l
- 1. Total area and total area tested for adhesion.
- 2. Total area which failed th,e pull test before repair. (Sum of l sample areas represented by at least one failed pull test before
. repair).
- 3. Frac, tion of total area 2sted which failed the pull test before repair.
- 4. Number of sample areas tested and average number of tests per sample area.
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- August 14, 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 21
- 5. Using the pull test data after correcting for instrument bias (calibration), provide a statistical evaluation of the fraction of the painted area failing the adhesion test, not including the exempted area. Where calibration data are not available, assume an instrument bias of 200 psia. Provide the standard deviation associated with the estimate of the fraction of the total painted area which failed the pull test, based on the corrected data.
Construct a 95% upper confidence limit for the proportion of the area which would fail the pull test.
- 6. Describe how the sample areas (.e.g. , grids) were selected.
Indicate the degree to which the spots actua'1y 1 tested were representative of each sample area.
- 7. For each item on the Coating Exemption Log involving an area of 1000 ft. or more, describe in detail the method of estimating
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, the area. Provide the total exempted area for each of the three main types of surface. -
B. ' Dry Film Thickness Tests For each of the three surface types, provide:
- 1. Total area tested for DFT (a) of primer, and (b) of complete coating systems.,
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O TII-4260 August 14, 1984
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QUESTIONS RELATIVE TO ALLEGATION NO. 21
- 2. Total area which failed the DFT test before repair (a) of primer and
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(b) for complete coating system.
- 3. Traction of total area tested which failed to meet DFT specifications before repair (a) for primer and- (b) for total coat.
- 4. Number of sample areas tested and average number of DFT tests per sample area (a) for primer and (b) for the complete coating system.
Response:
- A) Adhesion Tests A copy of'the pertinent information from the CPSES file relative to the calibration matter for the E1cometer is attached. The results of our statistical analysis were submitted in response to Question III.D.11 and III.D.12 transmitted by our letter No. TII-4225 dated July 16, 1984. As you will note,in reviewing the attached information, recomputation of the overall results of the backfit records did not significantly alter the
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earlier conclusions. It should also be noted that our r'esearch leading to
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this response has reveale'd that the failure rata previously' documented for the Unit 1 liner plate (excluding the E1cometer calibration matter), was in error in the conservative direction. There were no recorded readi:. s for the liner below 200 psi and thus the adhesion failure rate for the liner is the same as that previously reported for concrete.
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TXX-4260 August 14, 1984 .
QUESTIONS RELATIVE TO ALLEGATION No. 21 Consistent with the intent of this question, the backfit records for the Unit 1 liner have been analyzed taking into account the documented variances from the calibration records for the Elcometers. The results of these -
calculations are summarized in the attached memo from C7^R'. Levine to R. C.
Tolson dated August 10, 1984.
Responses to your specific comments or questions are as follows:
a) Copies of the PCR records were provided with our letter No. TXX-4223, dated July 16, 1984.
- 1) All test readings are reflected on the PCR records previously supplied. Test readings are not available for repair areas.
- 2) See the previously supplied PCR records.
- 3) Calibration records were supplied with our letter No. TXX-4225, dated July 16, 1984.
- 4) See our general comments, above.
b) Copies of the plotted calibration records discussed in our meeting of July 11, 1984 are attached.
, c) This information is not available. ,0ur best answers 'to these typen~ - - - - -
questions were provided in response to Questions III.A.4, III.D.11 and III.D.12 transmitted by our letter No. TXX-4225, dated July 16, 1984.
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, Tu-4260 4 August 14, 1984 .
b QUESTIONS RELATIVE TO ALLEGATION NO. 21 Relative to question C.6, the test frequency is established in the ;
backfit inspection instructions supplied with our letter No.
Tu-4225, dated July 16, 1984. (See response to Question III.A.1).
Dolly locations were randomly selected by the QC inspectors within the prescribed test area. The test results are representative of the areas tested.
Relative to question C.7, a copy of the Coatings Exempt Log was supplied with our letter No. T u -4225, dated July 16, 1984 and in response to your questions on Allegation No. 3 (TU-4249, dated Augu st 10, 1984). Areas shown were based on drawing takeoffs or physical seasurements. .
- 3) Dry Film Thickness Tests .
This information is not available. Statistical analyses were furnished to you at the close of our meeting on July 11, 1984 L
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TUQ4g' TEXAS UTILITIES GENT. RATING COMPANY
. OFFICE MEMOR ANDUM To J. T. Merritt ci.n m . Tenas January 18. 1984 Subject Comanche Peak Steam Electric Station The attached fonn documents a deficiency recently verbally reported to the NRC. Please assign an engineer to evaluate this deficiency working directly with the undersigned to resolve this problem. -
We need to jointly detennine by February 6.1984, if this deficiency is fonnally reportable under 10CFR50.55(e).
J Thank you for your cooperation.
R. G. Tolson TUGC0 Site QA Supervisor RGT/bil Attachment
'cc: D. N. Chapman B. C. Scott C. T. Brandt G. R. Purdy M. R. McBay J. D. Hicks SP 9
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o C 1ANCHE PEAK STEAM ELECTRIC S'. lON texas UTittitEs NCn no GENERATING CO. NONCONFORMANCE REPORT (NCR; C-84-000142 I
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UNIT STRUCTURE / SYSTEM ITEM / COMPONENT TAG /10 NUM8ER LOCATION OR ELEVATION RI A NO Protective E1cometer 106-2 1 Reactor Building Coatings Adhesion Tester All -----
NONCONFORMING CONDITION d Calibration tolerances (accuracy) used in calibration of the E1cometer 106-2 2 Adhesion Tester have been in error and not consistent with the guidelines of
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REFEAENCE DOCfNENT. ANSI N45.2 ngy 1971 pan, 13.0' REPORTED BY: DATE:
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1 /16/ 84 w C. T Brandt 1/ 16 84 O ACTION AcoRESSEE / / DEPARTMENT J. T. Merritt/0. C. Fra'nktTm/R. G. Tolson Construction /0A DISPOSITION:
REWORK YYY RE7 AIR UsE As is SCRAP
, Interim Disposition w
g 1. Revise calibration instruction to be consistent with manufacturer's .
o recomendations and ANSI N45.2. Criterion 13.0.
z 2. Review all adhesion test results and idintify any reading of 400 psi or lower. Provide copies of all records within this range to the
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- 3. Further dispoistion, if any, to be determined based on the review conducted per Step 2 above.
SNG. ReviEWIA AL e DATE:
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OtSPOSITN)N VERIFICATION & CLOSJW '
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I, UNIT STRUCTURE / SYSTEM ITEM / COMPONENT TAG /lO NUM8ER LOCATION OR ELEVATION RIR NO.
Protective Elcometer 106-2 2 Reactor Building Coatinas Adhesion Tester All .....
NONCONFORMING CONoiTION
_, Calibration tolerances (accuracy) used in calibration of the Elcometer 106-2 w Adhesion Tester have been in error and not consistent with the guidelines of f
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m REFERENCE DOCUMENT ANSI N45.2 ngy 1971 ,,,, 13.0 REPORTED BY: DATE:
R. G. Tolson ,/2 j 1 / 1 1/16/PA i QE REVIEW / APPROVAL:
// ,- DATE:
w C. T. Brandt ( , /. 1/ 16/84 O ACTION ADoRESSEE ./ V ' DEPARTMENT J. T. Merritt/D. C. Fr R. G. Tolson Construction /QA olSPoSITION:
REWORK XXX REPAIR UsE As IS SCRAP InteriFi Disposition ,
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M 1. Revise calibration instruction to be consistent' with d.anufacturer's
$ recomendations and ANSI N45.2, Criterion 13.0 8 2. Review all adhesion test results and identify any reading of 400 psi or g
6 lower. Provide copies of all records within this range to the TUGC0 Site o^ Saa'rvi$or-
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- 3. Further disposition, if any, to be determined based on the review conducted Q per-Step 2 above.
ENG. REVIEW D E of REVIEW A v .
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TEXAS L'TILITIESCENERATING COMPANY OFFICE MEMOR ANDUM To R. G. Tolson Glen nose. Texas January 19, 1984 subject. Adhesion Testing with Eltometer 106 - ANSI N512 This is to confirm our conversation on January 19, 1984, regarding the above subject.
As an alternate member of the ANSI M512 Comittee. I took part in the development of the standard.-Me committee consisted of architect /
' engineers, coating manufacturers, coating applicators and utilities.
Considering the diversit'y of the committee, there had to be a consensus on any and all decisions reached.
Relative to the Elcometer Adhesion Test (Re: para 6.4), the selection gf 200 lbs was totally arbitrary. Based on input from the coating manufacturers, it was judged that most epoxy coating systems, or phenolic-4 epoxy coating systems would pass a 200 lb pull.
It is my understanding that this. instrument was selected because it produces a " number." In my opinion, a " cross-hatch" adhesion test based on an ASTM Standard will produce a more accurate adhesion determination than the E1cometer 106. However, since " numbers" as such. are not pro-duced, it wasn't selected.
It should.be noted that the E1cometer 106 can be considered a laboratory -
instrument.
Throughout industry (chemical process, refinery, marine, etc.), it is -
not utilized in the field.
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TU0-1927 TENAS LTILITIES GENERATING COMPANT OFFICE MEMOR ANDUM To File Glen The. Texa. January 26. 1984 Subject SDAR CP-84-05 Sample check on Elcometer 106-2 Adhesion Testers M&TE No. 735 - Serial No. 6162 (old)
M&TE No. None - Serial No. 29260 (new)
Test performed with Proving Ring at NFS/ National Soil Services facility in Dallas, Texas on January 25, 1984 under the direction of the CPSES Con-struction QA Supervisor. The purpose of the test was to gain an approximate indication of the relative action of old and new gauges and to evaluate data previously obtained at CPSES using a static dead load tester.
Test No.1 - Set testers at 0, 200, 400 and 600 psi and read applied load on proving ring hpplied Load, psi Gauge Old New Reading (PSI) Gauge Gauge 0 0 0 .
200 127.4 124.0 400 300.2 310.8 600 468 522 Test No. 2 - Set proving ring at 600 psi and read gauges
! Applied Gauge Reading (psi)
Load Old -Mew psi' ^ ~
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TUQ-1927 Page 2 Test No. 3 - Apply 0, 200, 400 and 600 psi to proving ring and read gauges Gauge Reading (psi)
Applied Old New Load (psi) Gauge Gauge .
0 0 0 200 230 230 s 400 500 450 600 750 650 See Attachment A for graphical presentation of results.
R. G. Tolson TUGC0 Site QA Supervisor RGT/bil Attachment cc: J. T. Merritt D. N. Chapman 9 m e
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.+m. I q TUQ-1937 TEXAS UTILITIES GENERATING COMPANY OFFICE MEMOR ANDUM To File clen rme. Ten. February 11 1184 Subject 9nAR CP R1 n8s E1cometer Adhesion Testers This is to provide a status of the efforts accomplished to date to resolve the subject matter.
- 1. Immediately following identification of the problem,' Lisa Bielfeldt and Jerry Walker conducted a total review fo all protective coating records generated for the backfit inspection program and provided copies of all records which recorded adhesion values of 400 psi or lower.-
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- 2. The undersigned in a parallel effort plotted the calibration records for the E1cometer devices used at CPSES. These plots provided a timerev the subsequent vs,iews.. applied load history for accomplishing
- 3. The records provided per one -(1) above were reviewed against the calibration record plots from two (2) above by the under-signed. These records were separated into two categories:
A. One group which clearly meets or exceeds the minimum
- adhesion value of 200 psi specified by engineering;
- 8. One group which needs to be examined closer to assure that the specified adhesion value has been verified.
This review may be sumarized as follows. Review in one (1) above involved 3897 records.
Total Records Reviewed Group A Group B 2133 1601 532 Percentages , ,
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A. of Total Population 41.1% 13.7%
j B. of Selected Population 75.2% 24.8t NOTE: Special offsite testing reported via TUQ-1927 confirmed that calibration-records available at CPSES provided "
an accurate baseline for reviewing ,the records.
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February 13, 1984
- 4. Discussed the history of ANSI N5.12 (only industry standard available which discusses adhesion testing) with Jerry Firtel with Ebasco who is assisting CPSES in Protective Coating matters. The results of this discussion are summarized'in the attached memo from Mr. Firtel to the undersigned, j NOTE: In retrospect and in view of Mr. Firtel's report and the language in the ANSI standard, we would have satisfied our regulatory comittments by simply using the E1cometer "off the shelf". Our 1.ncorporation of the E1cometer into the CPSES calibration program should convey a clear message to our critics.
- 5. Boyce Grier has been checking the reviews conducted by the
, undersigned and has concurred with the categorization.
The next phase of our evaluation will include a detailed evaluation of the Group B records. It is anticipated that any questionable adhesion values
.will be resolved by one of the following methods based on the reviews to date.
- 1. Detail.ed evaluation should show the areas of questionable adhesion to be a very small percentace of the total surface area and thus could be added to the exempt log maintained by engineering.
- 2. In many cases, any questionable readings may be accepted on the basis of averaging.
- 3. Many of the areas were reflected on Unsat Inspection Reports and thus should have been resolved by rework activities.
- 4. If deered necessary, selected retesting could be accomplished using a 500 psi model of the E1cometer rather than the 1000 psi model. If this is done, the test should be stopped at 250 or 300 psi to minimize degradation of the E1cometer. A selected group of people would be involved.
NOTE: Many of the Group B records will be useful in the
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forthcoming licensing hearings as they will clearly show the lack of supervisory restraint on the inspectors.
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. File Page 2 - TUQ-1937 February 13, 1984 ,
- The second phase of the evaluation will be conducted under the direction of ~
Boyce Grier with the assistance of Quality Engineering and CP Engineering.
It is our opinion that this matter will ultimately be determined to be without safety significance and thus not formally reportable.
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R. G. Tolson TUGC0 Site QA Supervisor
- RGT/bil cc: SDAR CP-84-05 File D. N. Chapman J. T. Merritt *
- 8. H. Grier J. D. Hicks C. T. Brandt L. M. Popplewell N. S. Reynolds S
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.... . . ....... February 1a,, 1984 TXX 4111 Mr. E.H. Johnson, Chief Reactor Project Branch 1 U.S. Nuclear Regulatory Comission .
Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000 Docset Nos.. 50-445 Arlington, TX 76012 -
50-446 COMANCHE FEAK STEAN ELECTRIC STATION PROTECTIVE C0ATir;GS ADHESION TESTER QA FILE: CP-34-05. 50AR-129 F!LE: 10110
Dear t'r. Jonnson:
On January 16, 1934. .:e .ercally 'nforcea your Mr. R.G. Taylor of a deficiency regarding an error in the tolerances used in the calibration .
of the adhesion tester.
The preliminary analysis indicates this deficiency is not reportable
- under 10CFR50.55(e), newever, we are continuing our evaluation. *e .s anticipate cocoletion by May 15. 1934.
l Very truly yours,
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' ' Director, Inspection 4 Enforcement -(15 copies)
U.S. Nuclear Regulatory Comission
- Washington, DC 20555 l
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May 11, 1984 TXX-4168 Mr. E.H. Johnson, Chief Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket Nos. 50-445 Arlington, TX 76012 50-446 m COMANCHE PEAK STEAM ELECTRIC STATION PROTECTIVE C0ATINGS ADHESION TESTER QA FILE: CP-84-05, SDAR-129 FILE NO.: 10110
Dear Mr. Johnson:
On January 16, 1984 we verbally informed your Mr.-R.G. Taylor of a discrepancy regarding an error in the tolerances used in the calibration of the adhesion tester. We have submitted an interim report logged TXX-4111, dated February 15, 1984 We are continuing our evaluation and. anticipate completion by August 1, 1984.
Very truly yours, TC '.
BRC:tig l cc: NRC Region IV - (0 + 1 copy)
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Director, Inspection & Enforcement (15 copies)
U.S. Nuclear Regulatory Commission Washington, DC 20555 a amman ormAs e m.mse ma,meme mamar ggy. -
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bec: M. D. Spence B. R. Clements D. N. Chapman R. L. Ramsey J. C. Kuykendall J. T. Merritt D. Frankum H. C. Schmidt B. S. Dacko .
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- .-l Q l.O~ ~ COAN (P . [ U . c $~ JUL 2 41984 TEXAS' UTILITIES GENERATING COMPANY OFFICE MEMOR ANDifM To A. Veaa cien no . Texas July 24,1984 l'
Subject Re: SDAR-CP-84 Calibration of Protective Coatina Adhesion Tester We have concluded our evaluation of the subject SDAR and have concluded that this matter is not fomally reportable under the provisions of 10CFR50.55(e).
Our basis for this detemination includes the following:
- 1) The statistical analyses previously completed of the backfit in-spection program are not materially affected by ignoring the re-ports containing adhesion values which may be affected by the cali-bration matter. See attached memo from C.R. Levine to R.G. Tolson.
, 2) Our recently completed engineering study of containment sump perfor-mance clearly shows that no safety impact on the operation of the plant would occur, even if one assumed that all of the coatings inside the containment were to " fail".
Please advise if we can provide any additional infomation.
J l ( A GC- -'
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ist. Pro ect Manage cc: J.B. George R.G. Tolson '
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TEXAS UTILITIES GENERATING COMPANY I
OFFICE MEMOR ANDUM i To R. G. Tolson cien m . Teus July 24,1984 subj.ct COMANCHE PEAK STEAM ELECTRIC STATION BACKFIT INSPECTION PROGRAM ADHESION TESTERS As you are aware, examination of the calibration records suggests that select adhesion testers were not within calibration limits during periods of the backfit program. Consequently, the measurements taken with those testers cannot be reliably used at face value in detennining the statis-tical adequacy of the backfit program. The statistical calculations have. been revised and are presented below:
, Oricinal Revised Failure 95% Confidence Failure 95% Confidence Rate Limit Rate Limit Liner 2.30% 97% 3.32% 96%
Concrete 0% 9?% 0%' 99%
Miscellaneous -
Steel 0.55% 99% 0.76% 99%
The original calculations are those presented in TUGCO's response to the Brookhaven Report TXX-4225.
In conclusion, the decision to tenninate the backfit inspection program based on statistical calculations is not significantly altered by the exclusion of the questionable adhesion tester readings.
C. R. Levine
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CRL: pew cc: J. T. Merritt, Jr. '
A. Vega -
L. Bielfeldt J. Firtel T. Kelly
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TEXAS UTILITIES GENERATING COMPAhT SKYWAY TnWER
- 400 NORTH OLIVE STREET. L.B. 58
- DALLAM. TEAAM 73208
= " PL"E'E July 31, 1984 TXX-4244 Mr. E.H. Johnson, Chief
. Reactor Project Bran:h 1
. U.S. Nuclear Regulatory Commission Office of Inspectior & Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket Nos.: 50-445 Arlington, TX 76012 50-446 COMANCHE PEAX STEAM ELECTRIC STATION PROTECTIVE C0ATINGS ADHESION TESTER QA FILE: CP-84-05, SDAR-129 FILE NO.: 10110
Dear Mr. Johnson,
On January 16, 1984 we verbally contacted your Mr. R.G. Taylor of a deficiency regarding ,an error in the tolerances used in the calibration of the adhesion tester. We have submitted interim reports logged TXX-4111 and TXX-4168, dated February 15, 1984 and May 11, 1984.
We are continuing our evaluation and anticipate cmpletion by September 1, 1984.
Very truly yours, y-Billy R. Clements BRC:tig .
cc: PRC Region IV '(0 + 1 copy) ~
Directoi, Inspection & Enforcement (15 copies)
U.S. Nuclear Regulatory Commission Washington, DC 20555 REcg,yg 3 1984 Assu m 4 N (f
- bec: M. D. Spence B. R. Clements ,
D. N. Chapman R. L. Ramsey J. C. Kuykendall J. T. Merritt D. Frankum
~ H. C. Schmidt B. S. Dacko A. Vega J. Cummins-
- F. B. Shants J. B. George
. M. R. McBay Teri S.. art N. S. Reynolds R. T. Jenkins
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tldL". .".i".*".1 August 5, 1984 TXX-4248 l l
Mr. E.H. Johnson. Chief Reactor Project Branch 1 U.S. Nuclear Regulatory Consission Office of Inspection 8 Enforcement 611 Ryan Plaza Drive, Suite 1000 Arlington TX 76012 Docket Nos.: 50-445 50-446 C01ANCHE PEAX STEMt ELECTRIC STATION PROTECTIVE COATINGS ADHESION TESTER QA FILE: CP-84-05, SD!A-129 FIE NO.: 10110
Dear Mr. Johnson,
On January 16, 1984 we verbally contacted your Mr. R.G. Taylor of a deficiency regarding tester. an error in the tolerances used in the calibration of the adhesion We have submitted interim reports logged TXX-4111,- TXX-4168, and TXX-4244 dated February 15,' 1984, May 11,1984, and July 31, 1984.
We have completed cur investigation and concluded that the matter is not reportable under 10CFR50.55(e). Records supporting this determination are available for your inspector's review at the CPSES site.
Very truly yours,
^
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i Billy R. Clements BRC:tig cc: NtC Region IV ,(0 + 1 copy)
Director, Inspection & Enforcement (15 copies)
U.S. Nuclear Regulatory Commission Washington, DC 20555 4
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.~- . "e TEXAS UTILITIES GENERATING COMPANY OFFICE MEMOR ANDUM To R. G. Tel:en Glen Ro . Texa, Auaust 10, 1984 subject C0f!ANCHE PEAP, STEAli ELECTRIC STATION INDETERMINATE ELC0fETER READING 5 - UNIT I LINER A review of the Unit 1 PCR's was conducted. There were no readings with absolute value below 200 psi. When the Elcometer readings were compared with the calibration historf curves, it was determined that fifty-one (51) readings may have been~ below 200 psi when the full calibration error was aoolied to the readings. This represents 5.6 percent of the total readings (869) taken.
The indeterminate area was calculated by equating the percentage of sreadings indeterminate to the percentage of inspected area indetermi-nate. For example, if 1 of 3 readings was indeterminate,1/3 of the inspected area was considered to be indeterminate. The indeterminate area on the Unit 1 Liner Plate was calculated to be 5148 souare feet or 3.5% of the total liner surface.
Attached is a list of PCR's with indeterminate readings and the cal-culated area.
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C. R.'Levine Project Manager - Ebasco CRL: pew Attachment cc: L. F. Fikar J. Firtel T. Kelly *
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