ML20070K911
| ML20070K911 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 12/20/1982 |
| From: | Maurin L LOUISIANA POWER & LIGHT CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, W3I82-0149, W3I82-149, NUDOCS 8212300310 | |
| Download: ML20070K911 (2) | |
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C e e I OUISIANA P O W E R & L i G H T! P O Box 6008
- NEW ORLEANS. LOUISIANA 70174 242 octAnONoe S1ncer
- (504) 366 2345
ESONbsY$
u L V. MAURIlf m December 20, 1982 Vce Presdent Nuckar Opera!9nsq W3182-0149
, ANN Q-3-A35.07.67/iQ/
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R Mr. John T. Collins, Regional Administrator, Region IV
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U. S. Nuclear Regule. tory Commission s
611 Ryan Plaza Drive, Suite 1000 Arlington, Texes 76012
SUBJECT:
Waterford SES Unit No. 3 Docket No. 50-382 Final Report of Significant Construction Deficiency No. 67
" Failure of A500 Grade "B" Tube Steel To Meet Chemical / Physical Properties"
REFERENCE:
LP&L Letter W3I82-Oll3 dated November 23, 1982
Dear Mr. Collins:
In accordance with the requirements of 10CPR50.55(e), we are hereby providing two copies of the Final Report of Significant Construction Deficiency No. 67, " Failure of A500 Grade "B" Tube Steel to Meet Chemical / Physical Properties."
Very truly yours, b//
L. V. Maurin LVM/ MAL:keh cc: 1) Director 3)
E. Blake Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.
20555 (with 15 copies of report)
- 2) Director 4)
W. Stevenson Office of Management Information and Program Control 1b-U. S. Nuclear Regulatory Commission Washington, D. C.
20555 (with I copy of report) 8212300310 821220 PDR ADOCK 05000382 S
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FINAL REPORT'OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 67;
" FAILURE.0F A500. GRADE. "B" TUBE : STEEL TO MEET CHEMICAL / PHYSICAL PROPERTIES"
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' INTRODUCTION This report is submitted pursuant to 10CFR50.55(e).
It describes deficiencies in the tube steel used in the fabrication of hanger supports'in the chilled water,' component cooling and blowdow. systems..This condition is considered reportable under the requirements of 10CFR50.55(e).
-To the best of our knowledge, this problem has not been reported to the NucleariRegulatory Commission pursuant to 10CFR21.
r DESCRIPTION In May,1982 Ebasco received one (1) piece of 40' x 4" x 4" x h" square struc-tural tubing ASTM A500 76 Grade "B", heat number;833L75350 (Mfg. Regal Tube) from Pressure Vessel Nuclear. Steels, Inc. along nith certification papers which were acceptable to ASTM A500 specifications. On October 20, 1982 Ebasco.
received a telex from Pressure Vessel Nuclear Steels, Inc. stating:-
"It has been determined that this one piece of ASTM A500 tube steel'has low elongation problem." Prior to October 20, 1982 Ebasco had. furnished this tubing to Tompkins-Beckwith (Mech. Contractor) for use as hanger supports. Tompkins-Eeckwith,'since then,Thas used this tubing to fabricate seven (7) hangers which
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are installed in Seismic I Installations. Presently, all tubing has been identified,and placed on hold. We are now in receipt of physical properties data from Pressure Vessel Nuclear Steels Incorporated which indicates that for heat no. 803L75350 the elongation properties are below the ASME/ ASTM code requirements. Howe,ver, the yield strength is still within code allowables.
Engineering has determined that the lower elongation properties do not impact design. The reduced elongation properties affects the behavior of the material in the plastic range..The allowable stresses used in design are well within the elastic limit of the material.
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SAFETY IMPLICATIONS Based on the above, there is no degradation of safety related systems where A500 steel is used for structural supports. Therefore, the safe shutdown of the plant is not affected.
CORRECTIVE ACTION NCR-W3-4827 has bcen initiated to track and document corrective action as dispositioned.
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.This report is submitted as the Final Report.-
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