ML20112B942
| ML20112B942 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/13/1985 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8503190345 | |
| Download: ML20112B942 (3) | |
Text
____- __-_ - _ - __________ - ___-_____-______-- - - ___
PHILADELPHIA ELECTRIC COMPANY 23o1 MARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.191o1 (215) 841 5020 nucos enouuc e son atac enec encouc esow nsenneus e, Docket No. 50-278 Mr. John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing U.S. Nuclear Regulatory Commincion nachington, D.C.
20555
SUBJECT:
Peach Bottom Atomic Power Station - Unit 3 Corrective Actions for Intergranular Strosc Corrosion Cracking (IGSCC) during Spring 1985 Refueling Outage
REFERENCE:
Letter, S.
L. Daltroff, PECo to J. F. Stolz, USNRC, December 14, 1984 i
Dear Mr. Stolz:
The reference letter forwarded our plans for mitigation of Intergranular Strons Corrosion Cracking (IGSCC) in primary I
system piping during the Peach Bottom Unit 3 Spring 1985 l
refueling outage. to the reference letter,
" Technical Justification for Multi-Cycic operation of Peach Bottom Unit 3 Recirculation and Ri!R Piping", prepared by Gonoral Electric Company, contained typographical errors on page 28 i
l (R!lR/ Recirculation Piping Ropair Summary), portaining to previously overlay repaired wolds.
l The number of wcld locations where ICSCC was detected, l
an well ao the number of wold locations overlay repaired, both reported as 15, should have indicated 17.
The number of wcld locations with IGSCC and not wold overlay repaired abould therefore be changed from 2 to 0.
A revised copy of page 20 with those changco indicated by a vertical bar in the margin is provided an an attachment to thin letter.
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Mr. John F. Stolz March 13, 1985 Page 2 We regret any inconvenience this may have caused you.
Should you require any additional information, please do not hesitate to contact us.
Veoy truly yours,
/{Nh
/
Attachment cc:
T. P. Johnson, Resident Site Inspector i
!?
l'.
a Table 1
. Peach Botton 3 l
RER/Resire'ulation Piping Repair Summary Total number of welds to'first isolation 149 (Note 1) valve outside primary containment (Recirentation System and RER Shutdown Cooling Section sad Return Piping) 24 (Note 2)
Number of weld loestions thought not susoeptible to IGSCC o,,
Member of weld locations, susceptible to IGSCC 125 Number of weld locations IHSI treated pl Number of weld locations where 105CC was 17 detested i
f.;
Number of weld locations weld overlay repaired 77 i'
Number of weld toestions with 105CC sad not 0
weld overlay repaired 17 Number of weld locations not esamined and not 1851 treated j,g
'l i
Number of weld losations esamined but not IRSI 17 treated 1.
This total does not imelude 3 esseeptible ITCU weld loestions which were not inspeeted.
2.
4 oweopolets to manifold locations were examined and found asseptable; 4 other sweepalet to manifold weld loestions were not inspected.
9 6
0 0
4 l
4 s
f e
28
'