ML20097B052
| ML20097B052 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 08/24/1984 |
| From: | Jens W DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-84-521-000 77, EF2-69667, PT21-84-521, PT21-84-521-000, NUDOCS 8409130481 | |
| Download: ML20097B052 (2) | |
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,,g vie. Presioen NWden Opratens Ferm*2 6400 North Dme Highway L
l newcon, u<nnan 4stes August 24, 1984 I
ma ses41s EF2-69667 Mr. James G. Keppler Regional Administrator Region'III U.
S.
Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
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Reference:
(1) Fermi 2 NRC Docket No. 5 0-341 (2) Letter, D.
A. Wells to J.
G. Keppler, September 9, 1982, EF2-59393
Subject:
Final Report of 10CFR50.55(e) Item 77 "1 Inch 3000# Carbon Steel Pipe Couplings and Caps" This is Detroit Edison's final report of Item 77, " Linear Indications in 1 Inch 3000# Carbon Steel Pipe Couplings and Caps."
Item 77 was originally reported as a potential deficiency on August 10, 1982, and was subsequently documented in Reference (2).
Description of Deficiency During a warehouse inspection, Quality Control personnel identified linear indications in 1 inch 30005 carbon steel pipe caps manufactured by Capitol Manufacturing Company.
The linear indications were identified in caps from Heat Number (HT) 0680.
Records indicate th :t 195 caps had been received, of which 65 had been installed.
A liquid penetrant (PT) examination was performcd on 25 of the caps in storage, all 25 caps exhibited rejectable indications.
Based on these inspections, all HT 0680 caps were considered rejectable.
These caps were purchased by Wismer & Becker f rom Chicago Tube and Iron.
In addition, 200 1 inch 30006 carbon steel pipe couplings from HT 0680 were also received by Wismer and Becker, of which 77 had been issued for installation.
A liquid penetrant examination was performed on 20 of the couplings h
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'Mr.Ldames G. Keppler August 24, 1984 lEF2-69667 g'
Page.2
'in storage,.12. exhibited rejectable indications.. Based on these. inspections all uninstalled couplings were considered E
rejectable; installed ~ couplings required _further-examination.
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Analysis of Safety Implications Defects in carbon steel pipe couplings'and caps could'cause failure of the_ coupling or cap.
Failure of these components
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could cause_ loss"of safety component functions or' system l-pressure boundary integrity, thus adversely affecting the j
safe-operation of the plant.
Corrective Action The'following corrective actions have been taken to correct this deficiency:
o The total number of caps and couplings received at Fermi 2 :from Heat Number 0680.was determined.
o Et inspections were performed on the warehouse' stock caps and couplings.
Unused caps'and couplings from Heat-Number.0680 were collected, segregated and removed from the Fermi ~ site.
o
. Based on the results of the PT. inspections, all-HT 0630 caps installed in safety related systems were removed.
PT examinations were performed,on all couplings installed in safety related systems.
Couplings containing rejectable indications were removed.
The corrective actions were documented and implemented on Deviation Disposition Requests, in accordance 'with the Quality Assurance Program.
This is Detroit Edison's final report on this item.
If you have questions concerning this matter, please contact Mr. Lewis P. Bregni, (313) 586-5083.
Sincerely,
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fti cca Mr.
P.
M. Byron Mr.
R. C.
DeYoung Mr.
R. C. Knop l
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