ML20133A600
| ML20133A600 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 12/20/1996 |
| From: | Hosmer J COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9612310178 | |
| Download: ML20133A600 (1) | |
Text
F Commonwealth Elison Company 1400 Opus Place
- Dow ners Grove, IL 63515-57o1 l
December 20,1996 U. S. Nuclear Regulatory Commission Washington, D. C. 20555 l
Attn: Document Control Desk
Subject:
Byron Unit 1 Cycle Length NRC Docket Number 50:454
References:
1.
D. Wozniak letter to the Nuclear Regulatory Commission dated September 9, 1996, transmitting the Byron Station Unit i Steam Generator Interim Plugging Criteria 90 Day Report for the End of Cycle 7 Inspection 2.
K. Graesser letter to the Nuclear Regulatory Commission dated October 18,1996, transmitting the Operating Interval Between Eddy Current Inspections for Circumferential Indication in the Byron Unit 1 Steam Generators 3.
December 19,1996, Meeting Between the Commonwealth Edison Company and the Nuclear Regulatory Commission Pertaining to Byron Unit 1 Cycle Length In Reference 1, the Commonwealth Edison Company (Comed) provided justification to the Nuclear Regulatory Commission (NRC) for the operation of the Byron Station Unit I during Cycle 8 for 448.5 days above a T-Hot of 500 F. Comed also stated in that letter that this is the last cycle of operation for the Westinghouse D-4 steam generators, and that it was working to provide justification of operation of the Unit I until the steam generators are replaced. At that time Byron planned to replace the generators in mid February 1998, which would represent 600 days of operation. Reference 2 transmitted Comed technicaljustification for 600 days of operation.
l As discussed at the reference meeting due to changes in the steam generator delivery schedule, Comed has decided to accelerate replacements of the Byron Unit I steam generators to mid-December 1997. The current replacement schedule would equate to 540 days of operation above a T-Hot of 500 F. The Comed analysis supports 540 days of operation. Therefore, Comed is changing our commitment for the Byron Unit I maximum number of days above a T-Hot of 500 F of cycle length from 448.5 days to 540 days.
If you have any questions concerning this, please contact Denise Saccomando, Senior PWR Licensing Administrator at (630) 663-7283.
Sincerely,
-4 8 New, l John B. Hosmer Engineering Vice President cc:
M. D. Lynch, Senior Project Manager-NRR G. Dick, Byron Project Manger-NRR
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S. Burgess, Senior Resident Inspector-Byron A. B. Beach, Regional Administrator-Rill Office of Nuclear Safety-IDNS 9612310178 961220 PDR ADOCK 05000454 P
PDR k:nla:bybwd:stmgen:540. doc:1 A Unicom Company