ML20037B036
| ML20037B036 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 09/17/1976 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Bolger R COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8009030737 | |
| Download: ML20037B036 (3) | |
Text
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DISTRIBUTI0ri:
Docket (3)
Pwc'C.cnn e f1RC PDR (3)
Local PDR sc.e t...os.wN-o '
ORB-2 Reading VStello SD-237 KRGoller and 50-249 DLZiemann WEConverse
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RDSilver RMDiggs Co ronwealth Edison Company Attorney, OELD h ar w.s
/JTri: ffr. R. L. Bolger 01&E (5)
- I'v 4 Assistant Vice President JRBuchanan O
Post Office Box 767 TBAbernathy Chicago, Illinois 60690 ACRS (16)
DEisenhut Gentlenen:
JCollins RVollmer lle are revicuing your June 4, 1976 submittal &thich provided the Dresden Station - linit !!os.1, 2 and 310 CFR Part 50, Appendix I evaluations.
He have detemined that the infomation described in the enclosure is neccssary to continue our review. Any requested infomation already on public record nay be furnished by reference.
To enable us to naintain our review schedule, please submit the requested infomation within 3D days of your receipt of this letter.
Sincerely, I
n,.:.
- _..2.m Dennis L. Zienann, Chief Operating Reactors Branch #2 Division of Operating Reactors
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Request for Additional Informa tion cc u/cnclesurt:
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REQUEST FOR ADDITIONAL INFOR!MTION
.DRESDEN NUCLEAR STATION, UNIT'NOS. 1, 2, AND 3' i
DOCKET N6S. 50-10, 50-237, AND 50-249 The following requests pertain to both Dresden Unit No. 1 and Dresden Unit Hos. 2 and 3 submittals:
1.
Provide flow rate,. velocity, relative temperature difference between j
gaseous effluent and ambient, and relative location to adjacent structures for each gaseous effluent release point.
J 2.
Define exactly-which wind and stability data were used for the calculation of the X/Q and D/Q values presented in Table 2.3-1.
Discuss the representativeness of these data relative to the type-of release analyzed.
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3.
Explain the reasons for the missing wind direction frequencies-in Table 2.5-2.
4.
Provide additional meteorological data from Argonne National Laboratcry for the period concurrent with that of site data for the meteorolo;4Lal parameters in Tables 2.5-1 through 2.5-3.
If these data are not j
available, provide data from another nearby, representative meteoro-
' logical data collection station for a minimum 10-year period and for the period concurrent with onsite data collection.
t 5.
Provide the missing joint _ frequency distributions of wind speed and wind direction by atmospheric stability class based on 300-foot wind data and temperature differential between 300 feet and 35 feet, as i
j well as 35-foot wind data and temperature differential between 150 feet and 35 feet, both for calendar year 1975.
6.
The data recovery for the joint frequency of wind and stability data is less than 90% for all recording levels, which does not meet the recommendations of Regulatory Guide 1.23.
Provide the procedures which will improve the data recovery to at least 90% and a schedule for submitting one complete annual cycle of meteorological data j
uith a recovery cf greater than 90%.
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