ML20107C433
| ML20107C433 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/24/1984 |
| From: | Fikar L TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20106F959 | List: |
| References | |
| TXX-4262, NUDOCS 8502210312 | |
| Download: ML20107C433 (10) | |
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TEXAS UTILITIES GENERATING COMPANY mKYWAY TOWER
- 400 NORTH OLIVE STREET. L.B. 81
- DALLAm. TE.%Asl 13201
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August 21, 1984 TXX-4262 Dockets: 50-445 50-446 Mr. Thomas A. Ip.colito Project Director for Comanche Peak Bivision of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555 COMANCHE PEAK STEAM ELECTRIC STATION UNITS 1 AND 2 ADDITIONAL OUESTIONS RELATIVE TO PROTECTIVE C0ATINGS ALLEGATIONS FILE NO. 906.1, 10010
Dear Mr. Ippolito:
Attached find our detailed response to your additional ouestions relative to protective coating allegations No.'s 15, 31 and 33 (as fomalized in your memorandum of July 27,1984). This completes our written responses to all of these additional cuestions.
Please let us know if we can orovide any additional information.
Sincerely, m
4 L. F. Fikar LFF: pew Attachments 8502210312 850213 1
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' August 21, 1984 QUESTIONS REI.ATIVE TO ALLEGATION NO. 15 a)
What is the size of the total surface area having this coating system (Inorganic zine over organic topcoat)?
b)
Explain the basis for this total surface area number.
c)
Are these areas entered in the coatings exemption log? Identify the NCR/DCA that covers these items.
d)
We have reviewed a' Request for Information or Clarification (RFIC), dated 10/20/83 that authorizes the use of the inorganic zine top over epoxy'.
We have also reviewed an earlier RFIC, dated 01/07/83 that does not permit zine to be applied over epoxy. What is the engineering justification for this change in requirements?
e)
Has inorganic zine actually been applied over epoxy in overlap areas? If so, identify the applicable IR's.
Response
a)
The available data does not permit a precise estimate of the area involved.
However, we have performed a sample review of the existing data on the Unit 1 liner place. Based on certain assumptions necessary to calculate total area, the surface area involved ranges from about 2500 to 6500 square feet.
The lower value is realistic and the upper value is considered conservative.
b)
Thdbasisforthisestimatewasastatisticallysoundsamplingof' primer repair records. Assumptions made included:
- 1) Overlap at the edge of the repair area was 1.5 inches;
- 2) Each 100 ft.
area of the liner experienced an average.of about 5.5 repairs; and
- 3) Size of the individual repair areas ranged from 1 to 3 square feet.
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' August 21, 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 15 c)
No d)
The referenced RFIC's were addressing degree of overlapping coating systens.
In a repair area, there is not a well defined separation between topcoat, primer and substrate. Within the repair area, there is a " feathered" area which has inorganic zine applied over topcoat.
e)
All primer repairs will probably contain areas where inorganic zine was applied over epoxy. Inspection records of primer repair areas are available for review.
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TII-4262
- ' August 21, 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 31 a)
Provide location pf records identifying limited access and inaccessible areas.
b)
Provide total area of identified limited access and inaccessible areas.
Explain the basis for this estimate.
c)
Indicate the level of supervision that is authorized to determine whether an area is limited access or inaccessible.
Response
a)
Some inspection reports (IR's)' and Travelers reference inaccessible er
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limited access areas.
b)
Total areas are estimated as follows:
Coated Surface Estimated Area (FT )
Inaccessible Liner 1400 Concrete 1000 Miscellaneous Steel 1000
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Limited Access Liner 200 Concrete 100'O Miscellaneous Steel.
1500-
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The above figures were based on the combined input from four experienced coating (field) engineers / technicians and are considered to be conservative.
' August 21, 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 31 c)
Certified QC inspectors, Quality Engineers, or Coatings Engineers are authorized to make this determination.
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' August 21, 1984 QUESTIONJ RELATIVE TO ALLEGATION NO. 33 Provide names, qualification dates and levels, and assignment dates for all individuals who were assigned as lead inspectors or'in other quality supervision functions for coatings since January 1982.
Response
NOTE: See attached Table of Contents from Protective Coatings Inspection Manual for identification of inspection functions.
William S. Avery - Assignnent Date: March 1982 - January 1983 QI-QP-11.4-1/11.4-5 (Certified 12/15/81, Level I)
QI-QP-11.4-23/11.4-24 (Certified 03/08/82, Level I)
QI-QP-11.4-10 (certified 03/08/82, Level I)
William Dunham - Assignment Date: February 1983 - August 1983 QI-QP-11.4-1/11.4-5 (Certified 12/28/81, Level I)
QI-QP-11.4-10 (Certified 03/31/82,' Level I)
QI-QP-11.4-23/11.4-24 (Certified 06/25/82, Level I)
Mike E. Foota - Assignment Date: September 198 December 1983 Civil Level III (Certified ~2/18/82)
Everett Mouser - Assignment Date: August 1983 - October 1983 No Protective Coatings Certifications e
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' August 21, 1984 QUESTIONS RTLATIVE TO ALLEGATION NO. 33 Robert Wallace - Assignment Date: March 1982 - May 1983 QI-QP-11.4-23/11.4-24 (Certified 03/08/82, Level I)
QI-QP-11.4-10 (Certified 03/08/82, Level I)
QI-QP-11.4-1/4-5 (Certified 03/08/82, Level I)
Harry Williams - Assignment Date: January 1982 - 1ugust 1983
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Civil Level III (Certified 08/03/81)
Neil Britton - Assignment Dates: March 1982 - February 1983 and October 1983 - May 1984 QI-QP-11.4-1/11.4-5 (Certified 11/25/81, Level I)
QI-QP-11.4-23 (Certified 11/25/81, Level I)
QI-QP-11.4-10 (Certified 02/09/82, Level I)
_QI-QP-11.4-24 (Certified 02/09/82, Level I)
QI-QP-11.4-26/11.4-27 (Certified 01/03/84, Letter)
QI-QP-11.4-29 (certified 03/13/84, Level I)
CP-QP-11.4 (Certified 04/27/84, Level II)
Protective Coatings Level.III (Certified 05/04/84) 3 1
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TXX-4262 1 August 21, 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 33 David Ambrose - Assignment Date: February 1984 - Present QI-QP-11.4-23/11.4-24 (Certified 01/18/83, Level I)
QI-QP-11.4-1/11.4-5 (certified 03/31/83, Level I)
QI-QP-11.4-10 (Certified 06/08/83, Level I)
QI-QP-11.4-26/11.4-27 (Certified 01/03/84, Letter)
QI-QP-11.4-29 (Certified 03/13/84, Level I)
CP-QP-11.4/ Daughter Instr. (Certified 05/17/84, Level II)
Fred Dunham - Assignment Date: July 1982 to March 1984 QI-QP-11.4-1/11.4-5 (Certified 05/12/82, Level I)
QI-QP-11.4-10 (Certified 05/14/82. Level I)
QI-QP-11.4-23/11.4-24 (Certified 06/03/82, Level I)
QI-QP-11.4-26/11.4-27 (Certified.01/03/84, Letter)
QI-QP-11.4-29 (Certified 03/13/84, Level I)
CP-QP-11.4/ Daughter Inst. (Certified 04/02/84, Level II)
Protective Coatings (Certified 04/02/84, Level III)
Jim Wren - Assignment Date: April 1984 to Present QI-QP-11.4-26 (Certified 02/02/84, Level I)
Q'I-QP-11.4-27'(Certified 02/10/84, Level I)
CP-QP-11.4/ Daughter Inst. (Certified 05/17/84, Level II) e 9
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TIX-4262 August 21', 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 33 Gary Yando - Assignment Date: September 1983 to Present QI-QP-11.4-1/11.4-5 (Certified 05/06/82, Level I)
QI-QP-11.4-23/11.4-24 (Certified 05/06/82, Level I)
QI-QP-11.4-10 (Certified 05/14/82, Level I)
QI-QP-11.4-26/11.4-27 (Certified 01/03/84, Letter)
CP-QP-11.4/ Daughter Inst. (Certified 06/07/84, Level II)
QI-QP-11.4-29 (Certified 07/12/84, Level II)
Joy Underwood - Assignment Date:. June 1984 to Present QI-QP-11.4-1/11.4-5 (Certified 01/24/83 Level I)
QI-QP-11.4-1d (Certified 01/24/83 Level I)
QI-QP-11.4-23/11.4-24 (Certified' 01/24/83, Level I)
QI-QP-11.4-26/11.4-27 (Certified 01/03/84, Letter)
QI-QP-11.4-29 (Certified 03/28/84,' Level 'I)
CP-QP-11.4/ Daughter Inst. (Certified 06/07/84, Level II)
James Uehlien - Assignment Date: January 1984 to Present QI-QP-11.4-23/11.4-24 (Certified 07/26/83, Level 1)
QI-QP-11.4'-1/11.4-5 (Certified 08/05/83, Level I)
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QI-QP-11.4-26 (Certified 01/03/84, Letter)
CP-QP-11.4/ Daughter Inst. (Certified 05/17/84, Level II)
QI-QP-11.4-29 (Certified 07/12/84, Level II) g S
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TII-4262
- August 21, 1984 QUESTIONS RELATIVE TO ALLEGATION NO. 33 M.G. Krisher - Assignment Date: September 1983 to Present Protective Coatings (Certified 09/08/83, Level III)
C.C. Randall - Assignment Date: June 1992 to September 1983 No Protective Coatings Certifications Mickey Finn - Assignment Date: August 1983 to Present QI-QP-11.4-10 (Certified 03/08/82, Level I) 1 QI-QP-11.4-1/11.4-5 (Certified 03/08/82, Level 1)
QI-QP-11.4-23/11.4-24 (Certified 03/08/82, Level I)
QI-QP-11.4-26/11.4-27 (Certified 01/03/84, Letter)
CP-QP-11.4/ Daughter Inst. (Certified 06/07/84, Level II)
QI-QP-11.4-29 (Certified 07/12/84, Level II)
Ken Wolverton - Assignment Date: October 1983 - February 1984 No Protective Coatings Certifications Paul Leyendecker - Assignment Date: April-1984'to July 1984 QI-QP-11.4-26 (Certified 02/02/84, Level I)
QI-QP-11.4-27 (Certified 02/10/84, Level I)
CP-QP-11.4 and Daughter Instr. (Certified 06/07/84, Level II)
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