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(searched for: doi:10.1299/kikai1938.44.3154)
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Mitsugu Tanaka, Hironori Watanabe, Kazuichiro Hashimoto, Yasuo Motoki, Mitsuo Naritomi, Gunji Nishio, Susumu Kitani
Published: 1 July 1981
by AMNS
Nuclear Technology, Volume 54, pp 54-67; https://doi.org/10.13182/nt81-a32753

Abstract:
Capacity curves, spray distributions, and droplet size distributions of light water reactor [pressurized water reactor (PWR) and boiling water reactor (BWR)] containment spray nozzles are obtained, and the heat removal effectiveness is evaluated by a computer program CONDENSE. It is revealed by the calculations that spray droplets from a PWR spray nozzle always attain the containment atmosphere temperature and spray droplets from a BWR spray nozzle attain the containment atmosphere temperature above ≍70°C.
Mitsugu Tanaka
Published: 1 February 1980
by AMNS
Nuclear Technology, Volume 47, pp 268-281; https://doi.org/10.13182/nt80-a32432

Abstract:
Heat transfer rates to spray droplets under conditions of a loss-of-coolant accident in a light water reactor have been calculated by two different droplet models: the rigid droplet model and the complete mixing droplet model For calculating the heat transfer rates, a computer program, CONDENSE, was developed. The program was designed to calculate the respective model with the corresponding input data. The difference between the two models in spray heat transfer efficiency and the effects of droplet size, initial velocity, spray angle, and gas temperature on the efficiency were revealed by calculations. In addition, the dependence of the efficiency on the fall distance of a droplet, which had not been reported despite its importance in evaluating the spray effectiveness in a vessel, was revealed.
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