ML19312E333

Responds to NRC 800228 Ltr Re Violations Noted in IE Insp Repts 50-566/80-03 & 50-567/80-03.Corrective actions:800324 & 0421 Submittals revised.Re-evaluation of Radiographs Showed Only Seven Welds Will Require Reradiographing

ML19312E333
Person / Time
Site:	Yellow Creek
Issue date:	04/28/1980
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19312E325	List: ML19312E333 ML19312E342
References
NUDOCS 8006040245
Download: ML19312E333 (2)

Text

. ..

TENNESSEE VALLEY AUTHORITY Q

. CH ATTANOOGA. TENNESSEE 37401 t,

400 Chestnut Street Tower II April 28, 1980 .-

Mr. James P. O'Reilly, Director Office of Inspection and Enforcement I$

U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street .

Atlanta, Georgia 30303

Dear Mr. O'Reilly:

YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 - NRC REGION II LETTER RII:WPK 50-566/80-03 AND 50-567/80 REVISED RESPONSE TO INFRACTION The subject letter dated April 9,1980, documented a verbal request for additional information on infraction 50-566/80-03-01 and 50-567/

80-03-01, failure to establish adequate measures to control radio-graphy. The initial resp- his infraction was submitted on March 24, 1980, and addi: . Information was submitted on April 21, 1980. Enclosed is our revised response to this infraction.

If you have any questions concerning this matter, please get in touch with D. L. Lambert at FTS 854-2581.

, Very truly yours, TENNESSEE VALLEY AUTHORITY i

) Uh .

. M. Mills, nager Nuclear Regulation and Safety Enclosure cc: Mr. Victor Stello, Jr., Director (Enclosure)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission a Washington, DC 20555 s l

fdPMcLAL cm'",

8006040)/f An Equal Opportunity Employer - - . ~

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. ENCLOSURE YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 FAILURE TO ESTABLISH ADEQUATE MEASURES TO CONTROL RADIOGRAPHY REVISED RESPONSE TO NRC INFRACTION 50-566/80-03-01 AND 50-567/80-03-01 Infraction As required by 10 CFR 50 Appendix B, Criterion IX and as implemented by Tennessee Valley Authority (TVA) Topical Report TVA-TR-75-Al, Section 17.1A.9, " Measures shall be established to assure that special processes, including---nondestructive testing are controlled and accomplished---in accordance with applicable codes-- ." ASME Code Section 11 paragraph X3334.4 requires that penetrameters be placed adjacent to the weld scam; in addition paragraph NE-5211 requires full radiography for longitudinal butt welded containment joints.

Contrary to the above, on February 7, 1980, seven radiographs of contain-ment structural butt welds exhibited penetrameters and shims extending into the weld. obscuring part of the area of interest.

Corrective Actions Taken and Results Achieved All radiographs made before February 22, 1980 (6,849), have been reexamined for similar deficiencies, and an additional 102 were found and nonconformed.

Reevaluation of the 102 radiographs initially nonconformed has resulted in the determination that shims were not overlapping into the weld is:

95 cases, and only 7 of these welds will require reradiographing. As stated in TVA's March 24, 1980, letter to J. P. 0*Failly, two of the radiographs cited by the NRC (seam Al incremcats 1 to 2 and seam A2 incre-mente 20 to 21) were reevaluated and found to be acceptable. Thus or.ly 12 welds will have to be reradiographed.

Steps Taken to Avoid Further Recurrence In order to prevent a recurrence, the film interpreters and radiograahers have been instructed in the requirements of shim placement.

In addition, Chicago Bridge and Iron (CBI) will issue a special written  ;

instruction informing all radiographers and film interpreters on proper placement of shims. This Special Instruction No. 5 will become part of the i Special Instructior. Folder No. 3.0 which is used in training new radiographers and film interpreters.

Date of Full Compliance The special instruction on shim placement has been issued, and the twelve welds will be reradiographed by June 1, 1980.

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