ML20080M728
| ML20080M728 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 02/04/1984 |
| From: | Schroeder C COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 8076N, NUDOCS 8402210265 | |
| Download: ML20080M728 (2) | |
Text
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[
N Commonwealth Edison
/
) One First National Ptizt, Chic %go, lihnois
.k C D Address R; ply to: Post Office Box 767
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,/ Chicago, Illiriois 60690 February 4, 1984
)
Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
LaSalle County Station Units 1 and 2 Primary Containment Isolation Following Reset of Isolation Signals NRC Docket Nos. 50-373 and 50-374 References (a):
C. W. Schroeder letter to H. R. Denton dated November 28, 1983.
(b):
C. W. Schroeder letter to H. R. Denton dated December 7, 1983.
Dear Mr. Denton:
Reference (a) provided an extensive summary and review of the actions taken regarding primary containment isolation following reset of the isolation signal.
Reference (b) provided an interim commitment to also place caution cards on the Unit 2 E12-F099A and B valves.
In addi-tional discussions with Dr. A. Bournia of your staf f, it was indicated that NRR had made a determination that the safety significance involved with the Unit 1 and Unit 2 valves in question is minimal.
- Because, however, the modifications required to change the valves were not complex, NRR would request that the valves be modified.
The purpose of this letter is to provide the following commit-ments:
For Unit 1, prior to startup after the first refueling outage, the
-following valves will be modified (or eliminated) so that, following a primary containment isolation, resetting of the isolation signal will not potentially result in automatic change of position of the valves.
1E21-F333 (Potential for elimination) lE22-F354 (Potential for elimination) lE51-F354 (Potential for elimina lon)
IE51-F355 (Potential for elimination) lE12-F099A lE12-F099B 8402210265 040204 PDR ADOCK C5000373 P-PDR
- rn H. R. Denton February 4, 1984
'For' Unit-2,. prior to exceeding.5% power, the following valves will be modified so that,-following a primary containment isolation, resetting of the, isolstion : signal will' not potentially result in automatic change of position of the' valves.
2E12-F099A 2E12-F0998 To the best of'my knowledge and belief the statements contained
'herein and in the attachment are true and correct.
In some respects these statements are r.ot based on my personal knowledge but upon informa-
. tion furnished by other-Commonwealth Edison and contractor employees.
.Such information has been reviewed in accordance:with Company practice and I believe it to be reliable.
One signed original and forty (40) copies of this letter are
-provided for'.your use.
-If there;are any further questions regarding this matter, please contact.this office.
Very truly yours,
'L Y C. W. Schroeder Nuclear Licensing Administrator
-lm cc:
J. G. Keppler NRC Resident Inspector 8076N
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