ML20055D846
| ML20055D846 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 06/24/1990 |
| From: | Chrzanowski R COMMONWEALTH EDISON CO. |
| To: | Murley T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20055D847 | List: |
| References | |
| NUDOCS 9007100081 | |
| Download: ML20055D846 (1) | |
Text
. -.
O CommonwealthEdison i
Zion Genwatigtetion g g m e m en Telephone 708 / 746 2084 June 24, 1990 j
Dr.-Thomas E. Murley, Director J
Office =of Nuclear Reactor Regulation V. S. Nuclear Regulatory Commission i
Hashington, DC 20555 Attn.
Document Control Desk j
Subject:
Zion Station Units 1 and 2 Pressurized Thermal Shock Submittal NRC Docket Nos. 50-295 and 50-304
Reference:
(a) March 23, 1990,- letter from R. A. Chrzanowski to T. E. Murley j
'l
Dear Dr. Murley:
1 In reference (a), Commonwealth Edison informed the Staff that the
-Zion Station Pressurized Thermal Shock' submittal would be revised.
This letter provides the enclosed report titled " Zion Units 1 and 2' Reactor Vessel Fluence and RT-PTS Evaluations", HCAP-10962, Revision 1. 'The report revision was.necessary due to the following reasons:
inconsistencies in the reactor vessel-beltline weld
' locations (as' discussed in reference a) new neutron exposure data from the Zion-surveillance =
capsule and ex-vessel dosimetry programs that changed the projected neutron fluence and reference ~ temperature for PTS
}
(RTPTS) values RTPTS values presented in the enclo:ure utilize the NRC accepted chemistry values'of.35 wt. % Cu' and.59 wt % Ni for the limiting Zion reactor vessel welds 1
1:
Please review the acceptability of the information' contained in the i
enclosed report to permit Commonwealth Edison to utilize this updated.
f,
.information in the Construction Permit to Operating License recapture submittal ~. This submittal is planned to follow the next Zion Unit 1_ refueling outage currently scheduled to begin September 1991.
Please direct any questions regarding this matter to this' office.
Very truly yours t
900710008
[9,
R.p[.Chrzanowsi I
Nuclear Licensing Administrator cc:
Zion Resident Inspector C. Patel - NRR
,pA k Region III Office
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