ML20004D166
| ML20004D166 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 05/18/1981 |
| From: | Rausch T COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-80-25, NUDOCS 8106080510 | |
| Download: ML20004D166 (2) | |
Text
- - -
f7 Commonwealth Edison
( (./
) One First National Plna. Chicago, Ilhnois
/
2;:
t Address Reply to: Post Office Box 767
( 7 '7 Chicago, Ilknois 60690
[
May 18, 1981 g y eq
/L )
37 MM 2 71981
-e Mr. James G. Keppler, Director D @ Su Directorate of Inspection and s
Enforcement - Region III g
U.S. Nuclear Regulatory Commission t
799 Roosevelt Road Glen Ellyn, IL 60137
Subject:
LaSalle County Station Units 1 and 2 Supplemental Response to IE Bulletin 80-25 (Item 3)
" Operating Problems with Target Rock Safety-Relief Valves at BWR's" NRC Docket Nos. 50-373/374 References (a):
J. G. Keppler letter to C. Reed dated December 19, 1980.
(b):
T. J. Rausch letter to J. G. Keppler dated March 19, 1980.
Dear Mr. Keppler:
Reference (b) provided the Commonwealth Edison Company response to the subject bulletin, in which we indicated that the review of bulletin item 3 was still in progress for LaSalle County Station.
The following completes our response f or LaSalle County Station.
Discussions with General Electric Company have resulted in the determination that this bulle',in is not applicable to LaSalle since the station is equipped with Crosby relief valves, not Target Rock valves.
In addition, our review of tne air supply systems to these valves indicates that overpressurization is protected against by relief valves set below the operating capability of the solenoid valves.
The relief valves are located on the nitrogen supply bank and on the air receiver tank.
Overpressurization would therefore require a double equipment failure (pressure control and relief valves) and no modifications are deemed necessary.
The station currently has procedures to guide the operator in response to an occurrence of low supply pressure.
l l
l W 21 m 8106080 9 0
O Mr. James G. Keppler May 18, 1981 To the best of my knowledge and belief, the statements contained herein are true and correct.
In some respects, these statemeats are not based on my personnel knowledge but upon information furnished by other Commonwealth Edison employees and contractor employees.
Such information has been reviewed in accordance with Company practice and I believe it to be reliable.
Please address any questions you may have concerning this response to this office.
Very truly yours, c
M Thomas J. Rausch Nuclear Licensing Administrator Special Projects cc:
NRC Region Ill Inspector - LaSalle Director of Inspection and Enforcement Washington, D.C.
20555 SUBSCRIBEDandSy0Sg'to before me this fA day of 3 a H 1981 b hM I, $0
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