ML18029A830
| ML18029A830 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 08/19/1985 |
| From: | Domer J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8509040102 | |
| Download: ML18029A830 (5) | |
Text
TENNESSEE VALLEYAUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II August 19, 1985 U.S. Nuclear Regulatory Commission Region II ATTN:
Dr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Dr. Grace:
CD BROWNS FERRY NU PLANT UNITS 1 2,
AN NRC-OIE REGION II INSPECTQHf REPORT 50-259/ 5-33, 50-260/85-33, 50- 96/85-33
RESPONSE
TO VIOLATION Enclosed is our response to R.
D. Walker's July 19, 1985 letter to H. G. Parris transmitting IE Inspection Report Nos. 50-259/85-33, 50-260/85-33, and 50-296/85-33 for our Browns Ferry Nuclear Plant which cited TVA with one Severity Level IV Violation.
If you have any questions, please get in touch with R.
E, Alsup at FTS 858-2725.
To the best of my knowledge, I declare the statements contained herein are Very truly yours, TENNESSE VALLEY AUTHORITY J.
A. Domer, Chief Nuclear Licensing Branch Enclosure cc:
Mr. James Taylor, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 8509040102 850819 PDR ADOCK 05000259 8
PDR An Equal Opportunity Employer
RESPONSE
NRC INSPECTION REPORT NOS.
50-259/ &5-33, 50-260/ &5-33, AND 50-296/ 85-33 ROGER D.
WALKER' LETTER TO H.
G, PARRIS DATED JULY 19, 1985 Item 1 10 CFR 50, Appendiz B, Criterion IX, as implemented by TVA Topical Report TVA-IR75-1A, Rev. 8, requires that the licensee establish measures to assure that special processes such as nondestructive testing are controlled.
Paragraph 9.1 of. TVA' Procedure N-UT-28, the applicable procedure for ultrasonic ezamination of overlay weld repairs, requires that scanning speeds not ezceed 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 surf ace be ground flat and smooth to provide adequate contact between the weld surf ace and ul trasonic probe with no bridging of low areas.
a
~
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 surf ace was not flat enough to provide continuous contact with the transducer.
Failure of the ezaminers to recognize these problems resulted in meaningless data being recorded.
This is a Severity Level IV violation (Supplement 1.D.2).
l.
Admission or Denial of the ~Alle ed Violation XVA admits violation occurred as stated.
2.
Reasons For the Violation The level II inspector did not fully understand procedure requirement s
and options available, He had not followed instructions as stated in Attachment G to Workplan 2096.85 for final surf ace. condition and did not follow good work practices to adequately control ezamina tion.
3.
Corrective ~Ste s Which Have
~Bee Taken and Results Achieved The level II inspector has been decertif ied in accordance with our procedures for the ul trasonic inspection method and will not be allowed to perform inspection operations until retraining and testing requirements have been sa tisf ied,
Page 2
Item 1 (continued) 4.
Corrective ~Sta a Which Will Be Taken to Avoid Farther Violationa Additional ultrasonic training will be given to all inspectors before any clad overlay ezaminations are performed, or they will be supervised by a level IIIif examina tions are required before formal training.
5.
Date When Full ~Con lienee Will Be Achieved Full compl iance will be achieved by September 2D,
- 19SS, by compl eting required inspector training.