ML20065G256

Interim Significant Const Deficiency Rept 62 Re Insp & Acceptance of Undersized Field Welds in 1/2-inch Stainless Steel Sampling Schedule 160 Piping.Initially Reported on 820820.Mercury Co Will Build Up Welds by 821222

ML20065G256
Person / Time
Site:	Waterford
Issue date:	09/20/1982
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, EFR-820920, W3I82-0036, W3I82-36, NUDOCS 8210040078
Download: ML20065G256 (3)

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LOUlSIANA ,4a outsoNoE S1nur POWER & LIGHT p o sox coce . NEW ORLEANS LOUISIANA 70174 - (504) 366 2345 wmswum L. V. MAURIN Vice President September 20, 1982 Nuclear Operations W3I82-0036 Q-3-A35.07.62 C N Mr. John T. Collins, Regional Administrator, Region IV ,

w U. S. Nuclear Regulatory Commission b ' '

I

'/l 611 Ryan Plaza Drive, Suite 1000  :

Arlington, Texas 76012 2 gf jg

SUBJECT:

Waterford SES Unit No. 3 ~~ "

Docket No. 50-382 Significant Construction Deficiency Report No. 62 -

" Undersize Welds on h" Schedule 160 Pipe" First Interim Report

REFERENCE:

Telecon - R. Bennett (LP&L) to S. Schum (NRC) on August 20, 1982

Dear Mr. Collins:

In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the interim report on Significant Construction Deficiency No. 62

" Undersize Welds on h" Schedule 160 Pipe".

Ver truly yours, L. V. Maurin ht &

LVM/ MAL:keh cc: 1) Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555

2) Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 t

/ (/

/

8210040078 820920 PDR ADOCK 05000382 S PDR

i INTERIM STATUS REPORT SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 62

" UNDERSIZE WELD ON b" SCHEDULE 160 PIPE" INTRODUCTION This report is submitted pursuant to 10CFR50.55(e). It describes a problem with inspection and acceptance of undersize field welds in h" stainless steel sampling lines being installed at the Waterford Steam Electric Station, Unit No. 3 at Taft, La. This problem is considered reportable under the requirements of 10CFR50.55(e). To the best of our knowledge, this problem has not been identified to the Nuclear Regulatory Commission pursuant to 10CFR21.

DESCRIPTION Based on a recommendation f rom LP&L Construction Q. A. that the Mercury Co.

Quality Control reinspect their socket welds on sampling lines using the acceptance criteria for b" stainless steel, schedule 160 piping, the Mercury Co. Q. C. discovered that many socket welds were undersized. These welds had been accepted by Mercury Co. Quality Control based on the acceptance criteria for h" stainless steel .065 wall tubing. The Mercury Co. Q. C.

inspectors, therefore, had originally used the criteria for 1/8" welds instead of 1/4" welds. Two undersized welds on sampling lines were found in the reactor coolant' system; eight in the Steam Generator Blowdown System sampling lines, and thirty in the pressurizer and quench tank sampling lines.

SAFETY IMPLICATIONS This condition represents a breakdown in the Mercury Co. Quality Assurance program in that undersized welds previously inspected and accepted could have gone undetected. Some of the welds in question were made on safety class 2 piping which make up part of the reactor coolant pressure boundary.

Had the condition remained uncorrected, the welds could have failed and j adversely affected the safety of the plant.

CORRECTIVE ACTION l Mercury Company will build up deficient welds and inspect the socket welds l on b" stainless steel schedule 160 piping to ensure welds are in accordance

with the correct acceptance criteria. Welds not in compliance with the

correct acceptance criteria will be built up/ repaired as necessary. This corrective action, with associated NDE inspection, will be completed by

, December 22, 1982 and a final report will be submitted by January 12, 1983.

l The Mercury Company will upgrade their Quality Control Welding Inspection Program as necessary to preclude recurrence, l

INTERIM SIATUS REPORT SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 62

" UNDERSIZE WELD ON " SCHEDULE 160 PIPE" INTRODUCTION This report is submitted pursuant to 10CFR50.55(e). It describes a problem with inspection and acceptance of undersize field welds in " stainles, steel sampling lines being installed at the Waterford Steam Electric Station, Unit No. 3 at Taft. La. This problem is considered reportable under the requirements of 10CFR50.55(e). To the best of our knowledge, this problem has not been identified to the Nuclear Regulatory Commission pursuant to 10CFR21.

DESCRIPTION Based on a recommendation from LP&L Construction Q. A. that the Mercury Co.

Quality Control reinspect their socket welds on sampling lines using the acceptance criteria for " stainless steel, schedule 160 piping, the Mercury Co. Q. C. discovered that many socket welds were undersized. These welds had been accepted by Mercury Co. Quality Control based on the acceptance criteria for " stainless steel .065 wall tubing. The Mercury Co. Q. C.

inspectors, therefore, had originally used the criteria for 1/8" welds instead of 1/4" welds. Two undersized welds on sampling lines were found in the reactor coolant system; eight in the Steam Generator Blowdown System sampling lines, and thirty in the pressurizer and quench tank sampling lines.

SAFETY IMPLICATIONS This condition represents a breakdown in the Mercury Co. Quality Assurance program in that undersized welds previously inspected and accepted could have gone undetected. Some of the welds in question were made on safety class 2 piping which make up part of the reactor coolant pressure boundary.

Had the condition remained uncorrected, the welds could have failed and adversely affected the safety of the plant.

CORRECTIVE ACTION Mercury Company will build up deficient welds and inspect the socket welds on b" stainless steel schedule 160 piping to ensure welds are in accordance with the correct acceptance criteria. Welds not in compliance with the correct acceptance criteria vill be built up/ repaired as necessary. This corrective action, with associated NDE inspection, will be completed by December 22, 1982 and a final report will be submitted by January 12, 1983.

The Mercury Company will upgrade their Quality Control Welding Inspection Program as necessary to preclude recurrence.

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