00000nam 2200000zi 4500 9.883022 CaOODSP 20241203113653 m o d f cr |n||||||||| 191219e198210##oncd ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-on En36-522/61-1982E-PDF Tsang, Gee, author. Darlington Ngs cooling water intake risk evaluation for frazil ice blockage / by Gee Tsang. [Burlington, Ontario] : Environment Canada, Canada Centre for Inland Waters = Environnement Canada, Centre canadien des eaux intérieures, October 1982. 1 online resource (217 pages in various pagings) : charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier Unpublished report Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Ontario Hydro is planning the construction of a nuclear power station at Darlington, Ontario. The cooling and process water will be drawn from Lake Ontario. The water intake will be constructed at a depth of 10 m and a perforated slab will be placed above the intake to prevent fish and other foreign objects from entering the water intake. The blockage of the water intake by frazil is one of the concerns of the water intake and for that the author is requested by Ontario Hydro to examine the frazil blockage. This report is produced in response to the above request. In the analytical study, the thermo-hydrodynamics for the heating and cooling of a lake for water near the freezing point is first explained. Then a mathematical model is developed to predict the cooling and the expansion of the mixing layer. The frazil blockage problem is translated into a problem of supercooling of the mixing layer after it has reached the bottom of the lake. Based on the mathematical model, a computer program is developed which permits the calculation of the temperature and the propagation of the mixing layer under different hydro-meteorological conditions. Some computed results are shown in the report"--Abstract. Includes abstracts in English and French. Frazil ice Ontario, Lake (N.Y. and Ont.) Mathematical models. Nuclear power plants Ontario. Intakes (Hydraulic engineering) Frasil Ontario, Lac (N.Y. et Ont.) Modèles mathématiques. Centrales nucléaires Ontario. Prises d'eau (Ouvrages hydrauliques) Canada. Environment Canada. Canada Centre for Inland Waters. Unpublished report (Canada Centre for Inland Waters) (CaOODSP)9.881827 PDF 13.96 MB https://publications.gc.ca/collections/collection_2019/eccc/en36-522/En36-522-61-1982-eng.pdf Updated copy with appendices (2020-11-24)