ML19208B817

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Supplements 790514 Response to IE Bulletin 79-03 Re Weld Defects in Stainless Steel Pipe Spools.Forwards Plan to Inspect 12 Installed Pipe Spools
ML19208B817
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 08/23/1979
From: Hines E
DETROIT EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 7909210455
Download: ML19208B817 (3)


Text

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Edward Hines

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Ed.ison 1 m c.-

August 23, 1979 EF2-46,920 Mr. James G. Keppler Regional Director Directorate of Regulatory Operations degion III U.S. Nuclear Regulatory Coc=tission 799 Roosave?t Road Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

Subject:

Detroit Edison,T.esponse to IE Bulletin No. 79-03 In our previous resprise, dated May 14, 1979, it us noted that information had been requested from a key supplier. This information has been received a'd the attached letter by Edison Engineering explains our plan t, examine twelve pipe spools already installed.

Within 120 days we wt11 submit a final report or another interim report that explains the progress and plans at that point.

Sincerely yours,

/. Y$bVV

[ dward Hines EH/TGB/hr Enclosure cc: Mr. John G. Davis, Acting Director Office of Inspection and Enforcement Division of Reactor Inspection Programs U.S. Nuclear Regulatory Commission Washington D.C. 20555 AUG 2 71973 38L308 79092109ff

Detroit Edison DRICD FERMI UNIT 2 PFnTECT DUlNEERIlU nICEIVED

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- AUG 2 0 iam EF2 - 45807

n. w. r ma To: R. W. Barr ,

Quality Assurance /

206 Engineering Construction-Troy f f Frcm: F. E. Gregor / ,

System Engineer - EF2 ' '

318 Engineering Construction-Troy I

Subject:

Follow-up Report for IE Bulletin 1b. 79-03

" Defective Pipe Materials."

In our previous review of the bulletin and its subsequent assess-rent, (EF2-45137) , we determined that no defective material was supplied for Fermi 2, with the possible exception of DRAVO. After more than 3 nonth delay, we finally received notice frcm DRAVO, that indeed 13 susceptible pieces of piping were identified as manufactured by Youngstown Welding and Engineering Cmpany. The piews in question are AS4E SA-312 T304 seam welded without filler metal, 16 inch NPS and all located within the HPCI System in safety related functions. Engineering has identified the pieces and developed a plan of action as follows:

1. Determine number, size and function of suspect spools (oxpleted) .
2. Determine location and construction status of tM spools
3. Determine which pieces of these spools have suspect materials (in progress) .
4. Determine material heat # of suspect materials, exanine the MIR's and other documents as available (to develop a time period, rumon trode of examination or NDE operator) .
5. Arrange for an informational Ur of the longitudinal welds in question, (accessible pieces only) to determine tM extent or existence of defects for a trend analysis.

Ob[;2GS

Mme to: August 13, 1979 R. W. Barr EF2 - 45807

6. Depending on the outcnTe of item #5 above, arrange to have the welds formally examined, using ASME III approved prowdures, operators and acwptan standards. 'Ihe good pieces will remain, the rejectable pieces will be replaced or requalified to assure that the safety of the system has not been ocmprcmised.

Please forward the above status to the NRC I&E Region III. We will prepare a final report of the disposition following the NDE re-examinations.

FED /dk APPROVED a- C W. F. Colbert '

Project Engineer Enrico Fermi 2 cc: M. G. Sigetich/T. J. O'Keefe L. Bertani W. M. Everett C. R. Bacon,M. H. Buchanan G. Butterworth Document Control m

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