ML20084G569
| ML20084G569 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 04/23/1984 |
| From: | Gerrets T LOUISIANA POWER & LIGHT CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 101, W3K84-0916, W3K84-916, NUDOCS 8405070275 | |
| Download: ML20084G569 (3) | |
Text
- _ _ _ _ _ _ _ _ _ _ _ _
LOUISIANA P O W E R & L i G H T! P O BOX 6008
- NEW OALEANS. LOUIStANA 70174 u2 oeLAnoNoe S1nEc1
- (504) 366 2345 UTIUTIES SYSTEM April 23, 1984 W3K84-0916 Q-3-A35.07.101
]M@MDW2 %
Mr. John T. Collins Regional Administrator, Region IV APR 3 0 l984 U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012
REFERENCE:
LP&L Letter W3K84-0815 dated April 5, 1984
Dear Mr. Collins:
SUBJECT:
Waterford SES Unit No. 3 Docket No. 50-382 Significant Construction Deficiency No. 101
" Traceability of Stainless Steel Instrumentation Tubing" Final Report In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Final Report for Significant Construction Deficiency No.
101, " Traceability of Stainless Steel Instrumentation Tubing".
If you have any questions, please advise.
Very truly yours, T. F. Cerrets Corporate Quality Assurance Manager Attachments TFG:CNH:SSTG cc: Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555 (15 copies) i I
PDR r
ht
Mr. John T. Collins April 23, 1984 W3K84-0916 Page 2 cc: Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. E. L. Blake Shaw, Pittman, Potts & Trowbridge 1800 M Street, N.W.
Washington, D.C.
20036 Mr. W. M. Stevenson Monroe & Lemann 1424 Whitney Building New Orleans, Louisiana 70130 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 Mr. W. A. Cross 7910 Woodmont Avenue Suite 1200 Bethesda, Maryland 20814
FINAL REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 101
" TRACEABILITY OF STAINLESS STEEL (SS) INSTRUMENTATION TUBING" INTRODUCTION This report is submitted to 10CFR50.55(e).
It describes the possibility that 0.049" stainless steel tubing could have been installed where 0.065" vall S.S.
tubing was specified. This possibility exists for both 3/8" and 1/2" S.S.
tubing.
In addition, 1/4" 0.D. S.S. non-safety related tubing may have been installed in safety related systems.
To the best of our knowledge, this deficiency has not been reported to the USNRC pursuant to 10CFR21.
DESCRIPTION During review of documentation it was discovered that some S.S. tubing with a vall thickness of 0.049" had been received on site.
There is concern that it may have been installed where 0.065" wall is required.
In addition, this review discovered that some 1/4" 0.D. S.S. tubing was purchased as non-safety related and may have been installed in safety related systems.
SAFETY IMPLICATIONS Based upon the research by Engineering and Quality Assurance that found the tubing installed meets the requirements of design, the deficiency would not have adversely affected the safety of operations throughout the expected lifetime of the nuclear power plant.
CORRECTIVE ACTION Engineering determined a temperature / pressure guideline for the acceptance of 0.049" wall tubing. A systematic search was performed to identify any tubing subjected to conditions outside the above parameters.
Installation documentation packages, for the tubing identified, were reviewed. The tubing for which there was no heat number documented showing where 0.065" wall tubing was installed, was ultrasonically tested to determine the wall thickness. All tubing tested was found to have a wall thickness greater than 0.065".
A review of all safety related tubing installation packages identified twenty-three packages for which no material traceability was found for the 1/4" tubing. A review by Engineering of the identified packages found the 1/4" tubing in those packages fell under the exclusion allowed by DCN-IC-232 R1.
This exclusion was for class breaks at valve manifolds and specific instruments listed in the DCN. All 1/4" tubing was found to be acceptable.
This report is submitted as a Final Report.
_a