ML19309G416

Forwards Revised Response to Violation Noted in IE Insp Repts 50-566/80-03 & 50-567/80-03 Re Failure to Establish & Control Radiography.Film Interpreters & Radiographers Instructed in Shim Placement

ML19309G416
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)
References
NUDOCS 8005060268
Download: ML19309G416 (2)

Text

. 8 e u5 0 60 2 din ~8 TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 400 Chestnut Street Tower II April 28, 1980 Mr. James P. O' Railly, Director Office of Ins ction and Enforcement U.S. Nuclear Re atory Comunission Region II - Suit 3100 101 Marietta Stree Atlanta, Georgia 3y03 Dear Mr. O'Reilly YELLOW CREFX FUCLEAR 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 response to this infraction was submitted on March 24, 1980, and additional 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 AUTliORITY L. M. Mills, Manager Nuclear Regulation and Safety l

Enclosure I

cc: Mr.VictorStallo,Jr., Director (Enclosure)/

Office of Inspection and Enforcement U.S. Nuclear Regulatory Comunission Washington, DC 20555 30/f SG

/!/

An Equal Opportunity Employer

a 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-A1, Section 17.lA.9, " Measures shall be established to assure that special processes, including---nondestructive testing are controlled and accomplishe'd---in accordance with applicable codes-- ." ASME Code Section II paragraph X3334.4 requires that penetrameters be placed adjacent to the weld seam; 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 in 95 cases, and only 7 of these welds will require reradiographing. As stated in TVA's March 24, 1980, letter to J. P. O'Reilly, two of the radiographs cited by the NRC (seam Al increments 1 to 2 and seam A2 incre-ments 20 to 21) were reevaluated and found to be acceptable. Thus only 12 welds will have to be reradiographed.

Steps Taken to Avoid Further Recurrence In order to prevent a recurrence, the film interpreters and radiographers 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 Special Instruction 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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