ML19354E445
| ML19354E445 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood, 05000000 |
| Issue date: | 01/22/1990 |
| From: | Schuster T COMMONWEALTH EDISON CO. |
| To: | Murley T Office of Nuclear Reactor Regulation |
| References | |
| GL-88-17, NUDOCS 9001310208 | |
| Download: ML19354E445 (1) | |
Text
Commonwealth Edison One First N tional Plaza Chicago,8!Iir.oi3 Address Reply to: Post Office Box 767'~
^
Chicago, Illinois 60690 0767 January 22, 1990 i
Dr. Thomas E. Murley, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 Generic Letter 88-17 Supplemental Information Loss of Decay Heat Removal NR Docket Nos. 50-454/455 and 50-456/457 i
.i
Reference:
a) November 1, 1989 letter from R.A. Chrzanowski to T.E. Murley j
Dear Dr. Murley:
1 Commonwealth Edison provided status on the implementation of Generic Letter 88-17, Loss of Decay Heat Removal, for Byron, Braidwood and Zion f
Stations in reference (a). This letter provides an update on the status of
'l the Residual Heat removal (RHR) system iconic display at Byron and Braidwood j
Stations.
Byron Station staff have designed a computer graphic for the Main Control Room. The graphic displays data in real time and reflects the status of the refueling water level and RHB pump parameters.
The display is a mimic 3
of the reactor vessel, steam generator, pressurizer and RCP, and is to scale with respect to plant elevation. The screen displays bar graphs and literal values for the four refueling level instruments and a pressurizer level Instrument. Also shown are the RHR pump suction and discharge pressures, discharge temperature and motor bearing temperatures.
This display software has been added to the Unit.1 Process Computer at Byron Station and is scheduled to be added to the Byron Unit 2 Process Computer by Augu..t 1, 1990.
Braidwood Station is scheduled to install the display software on both units by January 15, 1991.
Please direct any further questions regarding this matter to this office.
Very truly yours, lAw/.A h
s T.K. Schuster Nuclear Licensing Administrator
/sc1:0548T:1 cc:
Resident Inspector-Byron Resident Inspector-Braidwood L.N. 01shan-NRR S.P. Sands-NRR Region III Office Office of Nuclear Facility-IDNS
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9001310208 900122 PDR ADOCK 05000454
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PDC V
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