ML19257C534
| ML19257C534 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 01/23/1980 |
| From: | Peoples D COMMONWEALTH EDISON CO. |
| To: | Reeves E Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8001290355 | |
| Download: ML19257C534 (1) | |
Text
Commonwealth Edison One First National Plaza. Chicago. Ilknots Address Reply to: Post Office Box 767 Chicago. Ilhnois 60690
/
t]D
.g < d 90
,-a January 23, 1980
, [p Mr. Edward Reeves Project Manager ORB 1 Mail Stop 316 U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Operation of the Turbines at Zion Units 1 and 2
Dear Mr. Reeves:
On January 18, 1980, Commonwealth Edison, Westinghouse, and the NRC met to discuss the technical implications of turbine rotor disc cracks for Zion Units 1 and 2.
During this meeting Commonwealth Edison and Westinghouse presented the current information and analyses related to predicting crack growth.
The parties agreed that Zion Unit 1 turbine could be started up and operated for a period not to exceed 15 months at which time an inspection will be conducted.
It was also agreed that Zion Unit 2 could start up and run until either Zion Unit 1 is returned to full power or additional meetings between Westinghouse and the NRC provide adequate resolution of the technical issues which will allow operation until the May 2, 1980, shutdown date for refueling.
During the time period of operation of Zion Unit 2 turbine, the normal surveillance activities related to the overspeed trip function (i.e., closing the control, stop, and intercept valves one at a time) will be conducted once every two weeks versus the normal monthly schedule.
In addition, Zion Station will not run an actual overspeed of the turbine to test the trip prior to shutdown.
Very truly yours, k 0 Yf 0
D. L. Peoples Director of Nuclear Licensing
\\
9)
\\
1536A 8001290