ML19319C517
| ML19319C517 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 10/21/1973 |
| From: | US ATOMIC ENERGY COMMISSION (AEC) |
| To: | |
| Shared Package | |
| ML19319C510 | List: |
| References | |
| RTR-REGGD-01.023, RTR-REGGD-1.023 NUDOCS 8002190948 | |
| Download: ML19319C517 (3) | |
Text
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POSITION STATSMENT ON DAVIS-BESSE METEOROLOGICAL PROGRAM TOLEDO EDISON COMPANY DAVIS-BESSE PLANT DOCKET NO. 50-346 The present meteorological facility at the Davis-Besse site, operating since December 1969, is unacceptable to the staff at the present time for the following reasons:
- 1) the tower is-in a location where the measurements of meteorological parameters are affected by the structures of Unit 1,
and 2) the instrumentation of this tower does not meet the recommendations of Regulatory Guide 1.23.
Data collected onsite prior to the construction of Unit 1 buildings,.and pri r to the issuance of' Regulatory Guide 1.23, are considered accep tab le and have been used in the evaluation by the staff.
4 The applicant is aware of the inadequacies of the pre-sent meteorological facility, and is current.ly planning a 340 ft free-standing meteorological tower and 35 ft
- :s a tellite tower (for low level measurements) to be con-structed near the southwest corner of the Davis-Besse site.
On the free-standing tower, there will be wind direction speed and
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sensors at 250 ft and 340 ft, delta-T 35 ft to 250 ft and 35 ft to 340 ft, and dewpoint 8002190 ffpt
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. temperature at 35 ft and 340 ft.
The satellite tower, to be erected about 110 ft from the center of 2
the free-standing tower, will have wind speed and direction sensors at 35 ft.
The applicant has s t e.t e d that the instrumentation will meet the recommendation of Regulatory Guide 1.23.
The staff notes that there are several problems with the new location of the meteorological towers.
One possible problem is the effect that two ponds which lie between the reactor structures and the towers may have on the vertical temperature structure as measured at the new tower location.
A correlation study between temperature data collected on the old tower and temperature data collected on the new tower, covering a significant time perior is needed to determine the ponds' effect on the vertical temperature
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structure.
A second problem is that cooling towers for the proposed Units 2&3 will be positioned such that the new meteorological towers will be within the area of influence of the cooling towers.
The construction of the cooling towers is not scheduled for about four year;,
and the new meteorological facility will provide repre-sentative data until that time.
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. The staff feels-that the proposed meteorological program is acceptable at this time, however, correlation studies will be required to assess the effect of the cooling on vind speed and direction as measured at' the
- towers tower sensors, and to assess the effect of the cooling towers on the vertical temperature structure.
A second satellite tower, operating at least one year prior to, 7
and one year after, cons:ruction of,the cooling towers will be required to determine their effects on wind flows and vertical temperature structure.
The correlation s tudies will have to be evaluated by the staff prior to the use of these meteorological facilities for the operational meteorological progcams of Units 2&3, and for the continued use of these facilities for the operational program of Unit 1.
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