ML20098G612

Final Part 21/deficiency Rept Re Linear Indications on 5/8-inch Seamless Tubing.Initially Reported on 840417.Addl Tubing Tested by Liquid Penetrant Exam.No QA Level 1 Lines Contain Indication

ML20098G612
Person / Time
Site:	Fermi
Issue date:	09/18/1984
From:	Jens W DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-84-522-000 122, EF2-69713, PT21-84-522, PT21-84-522-000, NUDOCS 8410050217
Download: ML20098G612 (2)

Text

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[~'M

[ Wayne H. Jens' -

hb Ve; Nesident 1d ~ YI

'. Nt :le.r Operatx>ns f,'

Form 4 -

640C North Dix;e Highway N4 aport. Mougan 48)66 -

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September 18, 1984

.EF2-69713

'Mr. James G.

Keppler

-Regional Administrator Region.III:

~U.

S.' Nuclear Regulatory. Commission 799: Roosevelt Road Glen Ellyn, Illinois 60137

'D'ar.Mr. Keppler:

e References (1)

Fermi 2 NRC' Docket No. 50-341

.(2)

Letter W.

H. Jens to J.

G.

Keppler, May 17, 1984, EF2-68544 i

Subject:

Final Report of 10CFR50.55(e) Item 122

" Linear Indications on 5/8 Inch Seamless Tubing" This is Detroit Edison's. final report of Item 122, " Linear Indications on 5/8 inch Seamless Tubing."

Item.122 was originally reported as a potential deficiency on l April-~17, 1984, and was subsequently documented in Reference

-(2).

Description'of Deficiency After'Wismer and Becker completed the repair of a length of damaged'(slightly bent) 5/8 inch tubing, liquid penetrant tests were. performed in accordance with the repair proce--

dure which revealed linear indications running the full length of.the. tube.. Attempts to remove the indications by blending were= unsuccessful.

Deviation Disposition Request-I(DDR)-MP-13194 was ' written' to document this deficiency.

The<affected tubing is 5/8 inch outside diameter x 0.090

-inch nominal. wall, type 304 stainless steel.

The tubing was purchased from Guyon Alloys Inc.

Houston, Texas, and identified as' heat-number 464547.

Sample lengths of the tubing.were sent for analysis to both

' Detroit Edison's Engineering Research Department and Guyon Alloys, Inc./Sandvik Inc.,.the' vendor / manufacturer.

Detroit Edison's Engineering Research. Department reported the defect as a linear indication on'the outside diameter of the tube which runs-at a 45* angle-to the surface.- The depth of the indication varied from approximately 0.014 to 0.016 inch when measured perpendicular to the surface, or 17% of the wall-thickness.

8410050217 840918 QDRADOCK 05000341 SEP 24 884 PDR fpy

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% :% l Mr. James G'.

Keppler

September 18,.1984 1

EF2-69713 By.

Pageu2 9

vThe: vendor / manufacturer concurred with our Engineering

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~ Research ' Department's conclusion and also identified the probable cause as a. particle being _ lodged in the hot extru-sion die.-

This' particle would.cause a hollow Which When colds reduced would become. a closed fold appearing as a tight seam.

4Approximately 795 pieces of this hhat,' in 20' foot lengths, were'. supplied to) Fermi 2, and alle were -issued for. construc-Jtion.. This tubing.was used in safety-related applications.

?AEalysis-of Safety Implications

' Tubing ^ cf.this type Lis lused in safety-related instrument sensing ~1ines._ Failure of the tubing could cause the loss

~

of~ pressure. boundary and/or malfunction of the applicable

' instrument or. device.

Corrective Action 9

ASME Section III N5' Data Report Packages - for 5/8 inch stain-less steel tubing were reviewed by Detroit Edison's Quality Assurance-personnel 1with Field' Engineering assistance.- The l review revealed that~23 isometrics contained 142-piece lengths : of the - heat - number.'

These piece lengths were sub-fjected to_a liquid penetrant 1 examination.

The results of

-:these examinations showed only.one additional piece Which

~

_did not' pass' examination.

This.one piece, since it doesn't' appear to -tave the same type of linear indication, will be

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' blend: ground, further examined for acceptability, and -

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. replaced if necessary.-

Engineering ' reviewed records for. QA Level I. Non-ASME Einstallations and: concluded that tubing with heat number.

464547 was not installed.

Therefore, there are no QA : Level I or QA Level I ASME 5/8 inch: lines ~ installed which:contain the linear indication

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! deficiency.

! This is Detroit 1 Edison's final report on this subject.

If

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you have questions 'concerning this matter, -please contact

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Mr. Lewis P.tDregni, (313) 586-5083.

Sincerely, y

A j'

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cc ';Mr.

P..M.? Byron r

Mr.

R.. C. DeYoung

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Mr..R.

C. Knop 1

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