ML19331D144
| ML19331D144 | |
| 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) |
| References | |
| NUDOCS 8008270369 | |
| Download: ML19331D144 (3) | |
Text
.e e
TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tcwer II August 18, 1980 hr. James P.
Reilly, Directer Offico cf Inap ' tion and Enfcrceaent 0.3. Lucieur Ree latory Cct=ission aegicn 11 - duite 1100 101 i.ariccta Streest.
r.La, Gecrgia 3G 03 Cent
..r. O'Reilly:
Y1 LLC!i CREEE NUGLEAh ?LAsiT UIIITS 1 AllD 2 - !!RC-0IE REGIOil II LET"ER
.CI:rFr; 20-55u80-03 AUD 50-5c7/S0-03 IIISPEC ICII REPORT - REVICED RESPC;!SE TO II.FF.AvTICJ The cutject letter dated Fecruary 26, 1980, cited TVA with cne infraction in cecer dance <ith 10 CFR 2.201 cn failure to establish adequate reasures to centcci esdiegraphy. The initial respence to this infracticn was sub u.tted en 1. arch 24, 1960. Supplemental reports teere submitted en
.apr:.1 Ec, lii80, and June 10, 1960. Encicacc is a revised final report.
Inc fincl repcrt on tnis infracticn has been.mevised to reficct TVA's dccisicn to reradiograph an coditicnal ceven velds. Aleo, IihC-0IS Inrpectcr J. Coley requested that the scope of this infraction be expanded to cover the additional problem of film darkening.
TVA expects to submit.
.r.ct:.er repcrt en the fil darkening problem discussed in the enclosurc by 'Jctcter 27, 1960.
If you ;. ave sr.-/ questions concerning this matter, pleace set in touch with D.
- s. Lc bcrt at FTS 657-2581.
Ver/ truly yours, TEl.hE3SEE VALLEY AUTHORITY L. J:. hilla, P.: nager Nuclear Requicticn sna Safety anciccure
,j cc: :P. Victor Stello, Jr., Direetcr (Enclosure) V urlace of Incpecticn and Enforcement U.S. i.uclear liegulatcry Cc:=10:icn Wacningtcn, LC 20555 b
800ggyn yq An Ecuat Ocaertun tv Employer
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 i=plemented 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 acco:plished---in accordance with applicable codes--." ASME Code Secticn 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 Taken and Results Achieved All radiographs =ade before February 22, 1980 (6,849), have been reexamined for similar deficiencies, and an additional 102 were found and noncenformed.
Reevaluatien of the 102 radiographs by Chicago Bridge and Iren (CBI) initially nonconformed resulted in the determination that shims were not overlapping into the weld in 95 cases, and only 7 of these welds required reradiographing. TVA reevaluation of 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 Al increments 1 to 2 and seam A2 incre=ents 20 to 21) were reevaluated and found 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 so=e 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 nonconfor=ed will be reprocessed, reevaluated, and reshot if required.
Steos Taken to Avoid Further Recurrence In ceder to prevent a recurrence, the film interpreters and radiographers have been instructed in the require =ents of shim placement.
a 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 radlegraphers and film interpreters.
Date of Full Compliance Six additional welds identified by TVA were reradiographed. The seventh weld was re=oved for penetration and thus did not require reradiographing.
All radiographs, both those reradiographed and others, are acceptable from penetra=eter concern.
On the concern with film darkening or radiographs, TVA expects to submit another report by October 27, 1980.
e
_ - _. - -