ML19345A002
| ML19345A002 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 08/01/1980 |
| From: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-79-03A, IEB-79-3A, NUDOCS 8009150502 | |
| Download: ML19345A002 (2) | |
Text
._
Y'50' PHILADELPHIA ELECTRIC COMPANY -
2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 SHIELDS L. DALTROFF ELECTRIC Pm c som August 1, 1980 Re: Docket Nos. 50-277 50-278 IE Bulletin 79-03A Mr. Boyce H. Grier, Director Office of Inspection & Enforcement Region I U.S.
Muclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406
Dear Mr. Grier:
This letter is in response to IE Bulletin 79-03A, forwarded to us on April 4, 1980, concerning " Longitudinal Weld Defects in ASME SA-312 Type 304 Stainless Steel Pipe".
The
" Action to be Taken by Licensees" and our responses are treated sequentially.
Action to be Taken by_ Licensees 1.
Determine whether SA-312 or A-312, Type 300 Series fusion welded pipe is in use or planned for use in safety-related systems subject to design stresses greater than 85 percent of the Code allowable stresses.
For the purpoce of this check the actual wall thickness of the piping products will be considered adequate if the code requirements for pr. essure design of the piping products are' satisfied using 85 percent of the maximum allowable stress at.the design temperature.
Response
An examination of Peach Bottom Unit 2 and 3 records for the use of SA-312 or A-312, Type 300 Series fusion welded pipe in safety-sessise Soa
Mt. Boyce H.
Grier Page 2 related systems identified only three pipe spools, all of which are in the Reactor Core Isolation Cooling Pump suction piping on Unit No. 3, utilizing ASTM A-312 Type 304 longitudinally welded
-pipe.
Maximum allowable stress calculations at the design temperature for all three pipe spools, none of which exceeded 27%
of the maximum code allowable stresses.
This is substantially below the 85% of code allowable stresses stipulated by the
' bulletin.
2.
For those piping components using greater than 85 percent of the allowable stresses identify the application'of the piping including the system, pipe location, pipe size, pipe configuration (elbow, tee), design pressure / temperature requirements and the manufacturer.
Response
It has been determined that the three piping components discussed above-do not exceed 85% of the code allowable stresses; therefore, the identification of piping application is not required.
Very truly' you rs,
7, s
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f, cc: NRC Of fice of Inspection and Enforcement
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Division of Reactor Cons truction Inspection Washington, DC 20555 a