ML19338E124
| ML19338E124 | |
| Person / Time | |
|---|---|
| Site: | Yellow Creek  |
| Issue date: | 08/18/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19338E118 | List: |
| References | |
| NUDOCS 8009240600 | |
| Download: ML19338E124 (3) | |
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TENNECEE VALLEY. AUTHORITY CHATT NbC$. kdh[NEO"Nb E7401
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Mr. James P. O'Reilly, Director Office of Inspection and Enforcement l
U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street Atlanta, Georgia-30303 D-Mr. O'Reilly:
YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 - NRC-0IE REGION II LETTER RII:WPK 50-566/80-03 AND 50-567/80-03 INSPECTION REPORT - REVISED RESPONSE TO INFRACTION The subject letter dated February 28, 1980, cited TVA with one infraction in accordance with 10 CFR 2.201 on failure to establish adequate measures l
to control radiography. The initial response to this infraction was submitted on March 24, 1980. Supplemental reports were submitted on April 28, 1980, and June 10, 1980. Enclosed is a revised final report.
The final report on this infraction has been revised to reflect TVA's decision to reradiograph an additional seven welds. Also, NRC-0IE Inspector J. Coley requested that the scope of this infraction be expanded I
to cover the additional problem of film darkening. TVA expects to submit I
another report on the film darkening problem discussed in the enclosure by October 27, 1980.
If you have any questions concerning this E.atter, please get in touch with D. L. Lambert at FTS 657-2581.
I Very truly yours, l
TE ESSEE VALLEY AUTHORITY
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M lis, nager Nuclear Regula ion and Safety Enclosure cc: Mr. Victor Stello, Jr., Director (Enclosure)
Office of Inspection and Enforcement
-U.S. Nuclear Regulatory Commission Washington, DC 20555 An Equal Opportunity Employer
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r-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 10CFR50, Appendix B, Criterion IX, and as implemented by Tennessee Valley Authority (TVA) Topical Report TVA-TR-75-A1, Section 17.1 A.9, " Measures shall be established to assure that special processes, including---nondestructive testing are controlled and accompliched---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 containment structural butt welds exhibited penetrameters and shims extending into the weld obscuring part of the area of interest.
Corrective Actions 'sken ar,d 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 radiograph 3 by Chicago Bridge and Iron (CBI) initially nonconformed resalted in the determination that shima were not overlapping into the weld in 95 cases, and only 7 of these welds required reradiographing. TVA reevaluation oS these 95 cases has resulted in seven more welds which TVA has requested be reradiographed. As stated in TVA's March 24, 1980, letter to J. P.
O'Reilly, two of the radiographs cited by the NRC (seam A1 increments 1 to 2 and seam A2 increments 20 to 21) were reevaluated and four.d to be acceptable. Thus, only 19 welds had to be reradiographed.
In the course of the film review, an additional problem was revealed in that some of the film had undergone a severe darkening after being examined and accepted by CBI, TVA, and ANI. The film identified on this problem has also been nonconformed and reported in NCR YC-088.
A representative of the film manufacturer (GEVAERT) has been requested to assist in determining the cause. Samples of the film were taken, and all film nsnconformed will be reprocessed, reevaluated, and reshot if required.
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.,
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8 In addition, CBI has issued 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 j
.and film interpreters.
Date of Full Compliance Six additional welds identified by TVA were reradiographed. The seventh i
weld was' removed for penetration and thus did not require reradiographing.
All radiographs, both those reradiographed and others, are acceptable from penetrameter concern.
On the concern with film da"kening or radiographs, IVA expects to submit another report by October 27, 1980.
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i TENNECCEE VALLEY AUTHORITY CHATTANOOGA. TENNEOCEE 374o1 400 Chestnut Street Tower II 3
i gj l2 A $ '. Il b Mr. James P. O'Reilly, Director Office of Inspection and Enforcement 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 INSPECTION REPORT -
REVISED SCHEDULE FOR COMPLETION OF CORRECTIVE ACTION ON INFRACTION The subject letter dated February 28, 1980, cited TVA with infraction 50-566/80-03-01 and '.u-567/80-03-01, failure to establish adequate measures to control radiography. A response to this infraction was submitted on March 24, 1980, and additional information was submitted on April 28, 1980.
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We were unable to complete reradiographing all 12 welds by June 1, 1980, as specified in our April 28, 1980, submittal. The welds are now I
expected to be reradiographed by July 1, 1980.
M. Thomas of your staff was informed of this schedule on June 4, 1980.
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If you have any questions concerning this matter, please get in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY b))U lb hg L. M. Mills, Manager Nuclear Regulation and Safety cc:
Mr. Victor Stello,~Jr., Director Office of Inspection and Enforcement l
U.S. Nuclear Regulatory Commission Washington, DC 20555 640 40 i
o6 go An Equal Opportunity Employer
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