ML19338D032
| ML19338D032 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/12/1980 |
| From: | Delgeorge L COMMONWEALTH EDISON CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19268D047 | List: |
| References | |
| NUDOCS 8009180406 | |
| Download: ML19338D032 (2) | |
Text
"
Commonwealth Edison t ',
f one First National P!aza. Chic ~go. Illinois u
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Address R ply to: Post Offica Box 767 Chicago, filinois 60690 3
(W September 12, 1980 Mr. B.
J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing U.S. Nuclear Regulatory Commission Wasnington, DC 20555
Subject:
LaSalle County Station Units 1 and 2 Supplement to Containment Design Assessment Report - " Chugging Loads For Assessment of the ATCO Data"
- Proprietary Information -
For Addressee Eyes Only Reference (a):
L.
O. De1 George letter to B. J.
Youngblood dated July ll, 1980
Dear Mr. Youngblood:
In order to respond to concerns raised by the NRC Staff relative to the materials presented in Reference (a), the enclosed supplemental report concerning " Chugging Loads For Assessment of the ATCO Data" are being submitted.
This report includes data associated with additional chugging test runs which bound the JAERI data at low frequencies.
It is judged that this report responds to the questions raised by your Staff (Mr. C. Anderson, et al) at the meeting of August 5, 1980 and completes the documentation for the chugging load definition for lead plant (s).
Although this report was orginally developed to address the load definition applicable to LaSalle County Unit 1 and 2, it is intended to apply to all lead plants in the Mark II Owners Group.
Other Mark II plants will review this report for applicability.
This report will be supplemented i pon completion of the LaSalle County structural assnssment.
This assessment is thought to be required to assure that the high degree of conservatism embodied in the chugging 1;ad definition is consistent with the existing plant o(
design basis.
9 It is judged that this report demonstrates that a chugging
(
load definition based on ATCO data provides a conservative oasis upon which the adequacy of the Mark Il lead plant designs can be p[N based.
The report also demonstrates that the ATCO data provides a 4
more conservative %ta base than the available JAERI multivent tests.
p 8009180 Y6f f
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Commonwecith Edison Mr. B. J. Youngolood, Chief September 12, 1980 Page 2 For LaSalle County Station, three (3) copies of this report are being submitted.
If there are any questions in this regard, please direct them to this office.
Very truly yours, A
jf n J
,A. V Ai
.P'f L.
O. DelGeorge Nuclear Licensing Administrator Enclosures 6682A