ML20106G082
| ML20106G082 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood, 05000000 |
| Issue date: | 10/15/1984 |
| From: | George Alexander COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 82-11, 82-12, 9315N, NUDOCS 8410310032 | |
| Download: ML20106G082 (2) | |
Text
.
g:
s Commonwealth Edisoni h
'^
y
-- i
-(
). One First Nati nal Pt;za. Chicago. Ilhnois
-(
~/ Addriss Reply to: Post Offica Box 767
/ ~
( j' Chicago, lllinois 60690 October 15, 1984 Mr. James G. Keppler Regional Administrator U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Sub ject :. Byron Generating Station Units 1 and 2 Braidwood Generating Station Units 1 and 2 Barton Instrument Accuracy NRC Docket Nos. 50-454/455/456/457 References (a):
January 28, 1983 letter from T. R. Tramm to J. G. Keppler (b):
March 28, 1983 letter from T. R. Tramm to J. G. Keppler (c):
June 1, 1983 letter from T. R.
Tramm to J. G. Keppler (d):
September 8, 1983 letter from T. R. Tramm to J. G. Keppler (e):
December 15, 1983 letter from T. R. Tramm to J. G. Keppler
Dear Mr. Keppler:
Reference (e) contained what was thought to be the final report on deficiencies 82-11 for Byron and 82-12 for Braidwood.
The letter indicated that the Barton transmitter thermal non-repeatability problem was due to an electrical leakage path through calibration potentiometers to the instrument case and Barton calibration technique deficiencies.
The letter also contained proposed corrective actions to eliminate the error sources.
l Since that time Westinghouse had concluded that the Barton l
transmitters do not require replacement or modification to ensure that they would perfrom their intended safety function.
A i
Westinghouse analysis determined that based upon the Byron /Braidwood I
setpoints sufficient margin still exists for each transmitter l
l l
l 8410310032 841015 PDR ADOCK 05000454 I Q S
PDR 7_
t-
Lei application.
Our Station Nuclear Engineering shares this conclusion.
To the best of my knowledge and belief the statements contained above are true and correct.
In some respects these statements are not based on my personal knowledge but upon information furnished by other Commonwealth Edison employees, consultants and contractors.
Such information has been reviewed in accordance with Company practice and I believe it to be reliable.
Please address further questions regarding this matter to this office.
Very truly yours, u
G. L. Alexender Nuclear Licensing Administrator 4
cc:
Director of Inspection and Enforcement Resident Inspectors - BY/BW 9315N U
l l
l.
.