ML20037B461
| ML20037B461 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 11/29/1976 |
| From: | Stello V Office of Nuclear Reactor Regulation |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20037B462 | List: |
| References | |
| 6118, NUDOCS 8010011013 | |
| Download: ML20037B461 (3) | |
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NOV 2 91976
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HEMORAUDUM FOR: Harold R. Denton, Dircetor, Division of Site Safety and E:EU Environmental Analysis, URR
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Victor Stello, Jr., Director, Divi.sion of Operating P ;:j eadors,.W
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SUSJECT:
REQUEST FOR TECHNICAL ASSITANCE FOR DRESDEN THERHAL
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[r J.=:c PLANT NAME: Dresden Nuclear Power Station, Units 1, 2, and 3' 5
LICEUSING STAGE: P-CL DOCKET NUMBERS:
50-10, 50-237, 50-E849 EEE 3=i RESPONSIELE BRANCH: Operating Ren0 tors Branch No. 3; EEB
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Pit 0 JECT HAHAGER:
M. Grotenhuis REQUESTED TARGET DATE: December 15, 1976
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The Environmental Evaluation Branch has been requested to evaluate is==$
Appendix B of the Non-Radiological Environmental Technical Specifica-
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tions sub=itted by Cocconwealth Edison Co=pany on August 20, '.976 for
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Dresden Nuclear Power Station.
h[,[77 In our evaluation of the proposed Environecntal Technical Specifications,
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we find it necessary to seek technical assistance from the Hydrology-Ntcorology Branch, DSE, to assess the plant's thernal impact on the c =..
Illinois River. The plant is no lonSer required by the state to operate
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of 500,000 gpm.
Esticates of average and wornt-case thernal conditions resulting from the present mode of operation are needed in order to perform an evaluation of this code of operatien. Enclosure I describes specifically the assistance we need from the Hydrology-Meteorology Branch and contains thermal data
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provided by the licensee under conditions of closed cycle operation. A teeting with the individuals in Hydrology-Meteorology Branch and EEB
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Contact:
J. Wilson, EEB/ DOR i.s fo ~ /3 =:
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Isna AIC-3:5 (ner. 9-53) AICM 0240 W u. s. novERNMENT PRINTlNG OFFICES 1974 826466
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Enclosed for reference in y ur review is a request of Com=onwealth Edison
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"or additional informs. tion from B. J. Youngblood dated February 4, 1975 pin--i..
and the licensee *s response to that request dated March 10, 1975.
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Victor Stello, Jr., Director hMk Division of Operating Reactors k:irt.
Office of Nuc) car Reactor Regulation p.:
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Enclosure:
LEE 5 Yhermal Data 55"...!5
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D. Eisenhut
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K. Goller DISTRIBUTION:
D. Huller Centra 1 Files l?"T....
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B. Grimes EEB Reading I[ T.~_T D. Ziemann D. Davis l+ := -
H. Grotenhuis l
V. Moore B. J. Youngblood
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S. Kirslis W. Bivins
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3 ENCLOSURE I SPECIFIC QUESTIONS REGARDING THE MODELING OF THERMAL DISCHARGE PLUMES AT DRESDEN NUCLEAR POWER STATION A.
Develop a model to predict the size and distribution of the 5'F thermal plume isotherm under the following two sets of conditions:
1.
a) Illinois River flow = 12,000 cfs b) Average ambient river temperature = 82'F c) Plant heat discharge rate = 11.2 X 10 BTU /hr d) Blowdown flow rate = 500,000 gpm e) No heat dissipated to atmosphere 2.
a) Illinois River flow = 3.300 crs l
b) Average ambient river temperature = 88.2*F i
c) Plant heat discharge rate = 11.2 X 10 BTU /hr L
d) Blowdown flow rate = 500,000 gpm e) No heat dissipated to atmosphere B.
The limits imposed by the NPDES permit limit the 5'F isotherm to a 26 acre zone and also state.that it must not exceed 25% of the cross-sectional area of the river. Establish a compliance curve relating Illinois River flow to average ambient river temperature for the conditions described in c, d, and e in A.l. above.
C.
Develop a technical specification for thermal plume mapping to be incorporated in the Special Studies Section 4.0.
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