ML18029A767
| ML18029A767 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 07/19/1985 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML18029A766 | List: |
| References | |
| 50-260-85-33, GL-84-07, GL-84-11, GL-84-7, TAC-55590, TAC-55591, TAC-55592, NUDOCS 8508090319 | |
| Download: ML18029A767 (2) | |
Text
ENCLOSURE 1
Tennessee Valley Authority Browns Ferry Docket No. 50-260 License No.
DPR-52 The following violation was identified during an inspection conducted on June 17-21, 1985.
The Severity Level was assigned in accordance with the NRC Enforcement Policy (10 CFR Part 2, Appendix C).
10 CFR 50, Appendix B, Criterion IX; as implemented by TVA Topical Report TVA-TR75-1A, Rev. 8, requires that the licensee establish measures to assure that special processes such as nondestructive testing are controlled.
Paragraph
- 9. 1 of TVA's Procedure N-UT-28, the applicable procedure for ultrasonic examination of overlay weld repairs, requires that scanning speeds not exceed four inches per second and that scanning be performed at two times the reference level unless other variables beyond the control of the operator, e.g.,
inherent material noise levels, preclude meaningful examinations at this sensitivity.
In addition, Attachment G to Work Plan 2096-85, used to document the visual acceptance of weld GR-2-15, requires that the overlay surface be ground flat and smooth to provide adequate contact between the weld surface and ultrasonic probe with no bridging of low areas.
Contrary to the
- above, on June 19,
- 1985, NDE was not being adequately controlled for weld GR-2-15 in that, the scanning speed was too fast for the test application, the sensitivity was too high for the material
- involved, and the weld surface was not flat enough to provide continuous contact with the transducer.
Failure of the examiners to recognize these problems resulted in meaningless data being recorded.
This is a Severity Level IV violation (Supplement 1.D.2).
I Pursuant to 10 CFR 2.201, you are required to submit to this office within 30 days of the date of this Notice, a written statement or explanation in reply, including:
(1) admission or denial of the alleged violation; (2) the reasons for the violation if admitted; (3) the corrective steps which have been taken and the results achieved; (4) corrective steps which will be taken to avoid further violations; and (5) the date when full compliance will be achieved.
Security or safeguards information should be submitted as an enclosure to facilitate withholding it from public disclosure as required by 10 CFR 2.790(d) or 10 CFR 73.21.
Date: )4~
8508090319 5000259 850719 PDR ADOCl o
@DR 6