ML20126C506
| ML20126C506 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/10/1985 |
| From: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8506140439 | |
| Download: ML20126C506 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 swirtos L oALTnorr n cr..c aoouctio June 10, 1985 Docket No. 50-277 Mr. John F.
Stolz, Chief Operating Reactors Branch #4 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
SUBJECT:
Peach Bottom Atomic Power Station, Unit No. 2 Containment Purge and Vent Valve Modifications
REFERENCE:
Letter dated February 20, 1985, J.
F.
Stolz, NRC, to E. G.
Bauer, Jr.,
PECo
Dear Mr. Stolz:
The referenced letter approved operation with greater opening positions for eighteen containment purge and vent valves contingent upon providing written confirmation to the NRC af ter completion of modifications that (1) the present material for the valve shafts and pins have been replaced with a high strength steel and (2) the orientation of the valve disc with respect to the flow corresponds with the opening positions and valve sizes as described in the referenced letter.
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The following table identifies the eight valves on Peach g g Bottom Unit No. 2 for which all the modifications described above "A
have been confirmed as being completed.
The table also f
identifies the as-lef t valve orientation and the new maximum open mo position.
. gac Valve New Opening Valve Disc 4
Valve No.
Size (inches)
Angle (max.)
Orientation g
AO-2505 18 55 Degrees Flow into hubside
- AL AO-2506 18 65 Degrees Flow into flatside AO-2707 18 65 Degrees Flow into flatside AO-2511 18 55 Degrees Flow into hubside AO-2512 18 55 Degrees Flow into hubside h0 AO-2520 18 55 Degrees Flow into hubside AO-2521A 18 65 Degrees Flow into flatside AO-2521B 18 65 Degrees Flow into flatside
I l
+
~
V.
Mr. John F. Stolz June 10, 1985 Page 2 These valves will be operated in accordance with the new opening limitations.
The ten remaining valves will be modified later during the current or a future outage, and written confirmation will be provided in a similar manner.
Should you have any questions regarding this matter, please do not hesitate to contact us.
Very truly yours,
',l
/ /
- ptE y cc:
T. P. Johnson, Resident Site Inspector