ML19338F560
| ML19338F560 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 09/15/1980 |
| From: | Hines E DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| EF2-49-851, IEB-79-03A, IEB-79-3A, NUDOCS 8010200572 | |
| Download: ML19338F560 (2) | |
Text
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_,:g Edward'Henes -
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gqf"ym September 15, 1.980 EF2-49,851
.Mr." James G. Keppler
' Regional ~Directot.
U.S. Nuclear Regulatory Commission Region III.
799 Roosevelt Road; Glen Ellyn,' Illinois '60137
Reference:
-Enrico fermi Power Plant, Unit 2-
-USNRC Licensing Docket: 50-341.
USNRC IE Bulletin 79-03A'(4-7-80)
Detroit. Edison Letter EF2-49,838 (8-26-80)-
Subject:
Detroit Edison Response to.NRC IE Bulletin 79-03A-
Dear Mr. Keppler:
Enclosed is Detroit Edison's final report of the analysis and evaluations of the potential Longitudinal Weld Defects in ASME SA-312 Stainless Steel Pipe described in the' subject bulletin.
Should you require additional infntmation from Detroit Edison in the matter, please advise us.
Very truly yours, EH/JDR/Im Enclosure
- cc: Director Division of Reactor Construction Inspection
~
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Director:
- Division of. Operating Reactors 0ffice of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.-
20555-
- .Mr.- Bruce Little,' Resident Inspector U.S. Nuclear Regulatory Commission Resident ' Inspector's Office
-6450' North Dixie Highway
- Newport,. Michigan 48166
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Enclosure:
to:.Ef2-49,851 k
REPORT-ON THE'USE-0F-ASME SA-312, TYPL'304
. STAINLESS STEEL PIPE-
Reference:
'NRC IE Bulletin 79-03A,' Longitudinal _ Weld'
-> Defects in ASME'SA-312 Stainless Steel Pipe
-The following is in. response to items -1, 2 A 3 of NRC IE Bulletin 79-03A:
l'. - ' All' SA-312 'or ' A-312, Typex 300 series ' fusion welded pipe -
planned for" use 'in safety-related systems has been re-viewed ' and identified. As's result of'this review,
- it was 'determineo that 'no safety-related pipe will be subjected to design stresses greater than 85 percent of3the maximum allowable stress at-the design temperature.
In-fact, the maximum design pressure stress that.any pipe would. be subjected to is less than 35 percent of the
~
- maximum code allowable.
'2
.There_are no' piping components'using~ greater-than 85
. percent of the allowable stresses, therefore, this section does not; apply.-
~3.-.All of-the safety-related SA-312,' Type 300 ' series fusion
- welded pipe is contained.within'the HPCI and condensate
.storace systems.- The specific portion of these'.two
. systs.ns containing the SA-312' welded pipe consists solely'. of the condensate suction line from the condensate
-storage tankEto the HPCI pump suction.
This suction line consists of approximately 780 feet of pipe, all of which has already been' installed.
Therefore, the ends of the
'SA-312 fusion welds cannot be etched.
' The: Detroit. Edison Company Enrico Fermi 2 Project"
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