ML18018B474
| ML18018B474 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 09/01/1983 |
| From: | Tsai S ARGONNE NATIONAL LABORATORY |
| To: | Lehr J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8311220282 | |
| Download: ML18018B474 (6) | |
Text
REG0LATORY IN ORMATION DISTRIBUTION SYST (RIDS)
ACCESSIPN NBR:8311220282 D
C ~ DATE: 83/09/01 NOTARIZED:
NO DOCKET FACIL:n50-400 Shearon Hat ris Nuclear Power Plant< Unit 1< Carolina 05000400 50 401 Shearon Harris Nuclear Power Plant< Unit 2< Carolina 05000401 AUTH,NA'ME AUTHOR AFFILIATION TSAI ASS Argonne National Laboratory RECIP ~ NAMF RECIPIENT AFFILIATION LEHRi J ~
Division of Engineering
SUBJECT:
Forwards info re hydrothermal analysis, Analysis presented in FES sound,Reser vair water stagnant Il nonstrati fied, DISTRIBUTION CODE:, BOOIS COPIES RECEIVED:LTR ENCL P SIZE:
TITLE: l.icensing Submittal:
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US,~en ee of &mqy ARCONNE NATIONALLABORATORY 9700 SouTk Ass AvEwve,ARqmmE, Iiwois60459 TdEphow )12/972-77g8 September 1,
1983 Mr. John Lehr Senior Environmental Engineer Division of Engineering U.S. Nuclear Regulatory Commission Mail Stop P314 Washington, D.
C.
20555
Dear Mr. Lehr:
As requested by you during our phone conversation yesterday, I would like to provide you with the following information related to the hydrothermal analysis for the Shearon Harris plant.
The work of Shirazi and Davis (1972), which was used in the Shearon Harris
- analysis, gave a very complete review of available submerged jet data and theory in the form of monograms for stratified and arbitrary ambient density profiles with and without cross flow.
This hydrothermal prediction technique, although developed in 1972, is still being regarded by experts in thermal plume modeling as one of the methods which gives accurate and good predictions on temperature distributions resulting from submerged discharges.
The basic assumptions involved in the development of this technique are:
1.
The flow is incompressible.
2.
Ambient turbulence does not contribute directly to dilution.
3.
The rate of entrainment of the ambient fluid is proportional to the local centerline velocity with the entrainment coefficient equal to 8.2 percent.
4.
Density of fluid is a linear function of temperature.
5.
Density differences are small so that the Boussineq approximation is valid.
6.
The buoyant forces in the initial development region of the jet are negligible.
For the Shearon Harris study, it was further assumed that the reservoir water is stagnant and non-stratified.
These assumed ambient conditions, as discussed previously in the FES, would give conservative results because stratification and natural currents would provide additional mixing of the effluent before it reaches the water surface.
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Mr. John Lehr
,September I, 1983 Page 2
The input data used for the Shearon Harris study are:
Normal Water Level Low Water Level Elevation of Discharge Point Rate of Discharge (2 Units)
Jet Diameter Discharge Velocity (2 Units)
Temperature Excess 220 ft MSL 204.4 ft MSL 182 ft MSL 46 cfs 4 ft 3.7 fps 9'F (in July) 32'F (in December)
I believe the hydrothermal analysis which I presented in the FES for the Shearon Harris plant is sound.
However, if you would like to have the analysis-redone with the use of other models, I will be glad to help you.
Sincerely, Steve Tsai Environmental, Research Division ST/amw cc:
C. J.
Roberts
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