ML20154H202
| ML20154H202 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/06/1986 |
| From: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Muller D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20154H206 | List: |
| References | |
| NUDOCS 8603100211 | |
| Download: ML20154H202 (2) | |
Text
._
t PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 WNM*NI sHitLos L. DALTRorr stsc n$c"e'nN$on March 6, 1986 Docket Nos. 50-277 50-278 Mr. Daniel R. Muller, Director BWR Project Directorate #2 Division of Boiling Water Reactor Licensing U.S.
Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Peach Bottom Atomic Power Station, Units 2 and 3, RHR pump wear ring cracks
Reference:
Summary of Meeting With Philadelphia Electric Company Concerning Shroud Head Bolt Cracks and RHR Wear Ring Cracks, Gerald E. Gears, NRC to Philadelphia Electric Company, dated January 14, 1986 Dear Mr. Muller l
l On December 19, 1985, representatives of Philadelphia j
Electric Company met with the NRC staf f in Bethesda, Maryland to discuss, in part, intergranular stress corrosion cracking (IGSCC) of residual heat removal (RHR) pump wear rings.
The NRC staf f l
requested that we present our findings concerning the IGSCC l
cracks on the RHR pump wear rings.
Detailed metallurgical l
examination of the Unit 3
'A' and
'C' RHR pump wear rings has been completed and the laboratory report is attached.
[
Since the meeting, the Unit 2
'B' RHR pump has been disassembled and inspected for cracked wear rings (on January 28, 1986).
No crack indications were visually found.
The impeller previously removed from the Unit 3
'A' RHR pump was installed in the Unit 2
'B' RHR pump with new impeller wear rings.
The casing wear rings were replaced as well.
This completes the installation of new wear rings in all eight of the Peach Bottom
[ [
RHR pumps.
3882288u8%88lI7 rtq(
g s
lt-
Mr. Daniql R. Muller, Director March 6, 1986 Page 2 r-Details of the inspection of the other seven RHR pump wear rings were submitted to the Commission on January 15, 1986 in LER 3-85-20.
Should you have.any questions or require additional information, please do not hesitate to contact us.
i Very truly yours,
~.
'/
'/
y'
}/L
/
Attachment cc:
Dr.
T.
E.
Murley, Administrator, Region I, USNRC T.
P. Johnson, Resident Site Inspector i
a 4
l
)
i i
k J
1 I
.