ML20205N344

Operational Fog & Ice Observation Program Data Summary for Second Quarter 1985

ML20205N344
Person / Time
Site:	LaSalle
Issue date:	06/30/1985
From:	Diederich G COMMONWEALTH EDISON CO.
To:	Jordan M NRC
References
5239E, NUDOCS 8605020096
Download: ML20205N344 (2)

Text

Attachment 2 -

Page 3 of 4 Fog cnd Rime Ica Monitering Program Summary

_LaSalle County Generating Station Incidence of Fog / Rise Ice Formation I

Third Quarter, 198 5 58 Days of Observations l

Fog /Ritme Ice '

Visibility in Feet (less than Observations Wind 1/4 mile) at Observation Points Det- Time Direc tion 1 2 3 4 5 6 7 8 9 Remarks General fog over 7-3 7:30a 50* 1200* 1200* 1200 1200 1200 800 800 1200 1200 entire area.

Light fog, no visi-8-5 7:00a 240* bility restrictions.

Light fog, no visi- -

8-6 7:00a 200* bility restrictions.-

General fog over 8-26 7:00a 319' 500* 500 500 500 500 500 500* 500* 500* entire area.

Light fog, no visi-8-29 7:00a 206* bility res t ri ct, ions .

Lignt rog, no vasi-8-30 7:00a 324* bility restrictions.

9-27 7:30a 30* 1000* 1000* 1000 1000 1000 1000 1000 1000 1000 l

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8605020096 850630 ,J PDR ADOCK 05000 .

R <DR o Demotes Fog Formation Downwind of Cooling Pond Obs.Pt. Dir. Span Obs.Pt. Dir. Span Obs.Pt. Dir Spas....

• 1 3050- 828 4 9QA161* 7 197"-339" l ;;:- p 2 270- 850 5 90*-2400 8 278*-351' '

3 650-112* 6 1880-262" 9 286 - 67*

(See Map on Reverse Side)

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Attachment 2 Commonwealth Edison Page 2 of 4

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72 West Adams Street. Chicago, Illinois

, . Address Remy to- Post Offce Box 767

% Chicago. Ilknois 60690 0767 August 12, 1985 M. Jordan Senior Resident Inspector LaSalle County Station U.S. Nuclear Regulatory Ceaunission subject: LaSalle County Station Units 1 and 2 Operational Fog and Ice Observation Program (NRC Docket No's. 50-373 and 50-374)

Dear Mr. Jordan:

In accordance with the Environmental Protection Plan, Appendix B.

Section 4.2.2 which is part of the operating license for LaSalle County Station Units 1 and 2 the following is a summary of the data for the second-quarter of 1985 of the operational fog and time ice observations in the  !-

vicinity of the cooling pond.

• During the second quarter of 1985, there were 63 observation days. During that period there were no occurrences where the visibility was restricted to less than 1/4 mile by fog and there were no occurrences of rime ice.

If you have any questions regarding this matter, please address them to this office.

Sincerely, G. J. Diederich

( . Station Superintendent 5239E ,

BBB:GJD:pp cc: M. J. Oestmann - Region III

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