The impact of cooling water discharge from A.S. King plant on water temperatures in Lake St. Croix during the summer of 1969 is evaluated in terms of overall effects. The information supplements previous studies of local temperature increments in the thermal plume. The method used is generally applicable and puts into focus the alteration of the elements of a natural heat budget by power plant effluents as well as illustrating some of the trade-offs between natural and artificial heat inputs and resultant temperature changes. Caution must be exerted when ambient temperatures are used to represent natural ones. The main objective was to demonstrate the applicability of the heat budget method to predict alterations of natural water temperatures caused by cooling water discharges. The particular numerical results obtained show no significant impact of cooling water discharges on water temperatures at the chosen demonstration site for the period of investigation.
{"title":"Impact of Cooling Water on Lake Temperatures","authors":"H. Stefan, C. Chu, H. Wing","doi":"10.1061/JPWEAM.0000719","DOIUrl":"https://doi.org/10.1061/JPWEAM.0000719","url":null,"abstract":"The impact of cooling water discharge from A.S. King plant on water temperatures in Lake St. Croix during the summer of 1969 is evaluated in terms of overall effects. The information supplements previous studies of local temperature increments in the thermal plume. The method used is generally applicable and puts into focus the alteration of the elements of a natural heat budget by power plant effluents as well as illustrating some of the trade-offs between natural and artificial heat inputs and resultant temperature changes. Caution must be exerted when ambient temperatures are used to represent natural ones. The main objective was to demonstrate the applicability of the heat budget method to predict alterations of natural water temperatures caused by cooling water discharges. The particular numerical results obtained show no significant impact of cooling water discharges on water temperatures at the chosen demonstration site for the period of investigation.","PeriodicalId":136288,"journal":{"name":"Journal of the Power Division","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134521861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Closure to “Tumut 2 Underground Power Plant”","authors":"I. L. Pinkerton, E. J. Gibson","doi":"10.1061/JPWEAM.0000487","DOIUrl":"https://doi.org/10.1061/JPWEAM.0000487","url":null,"abstract":"","PeriodicalId":136288,"journal":{"name":"Journal of the Power Division","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115206336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The high degree of safety required for nuclear power plants has given prominence to the problems of earthquake-resistant design. Extreme conservatism can lead to overly large factors of safety. Certain aspects of the earthquake design problem are discussed, such as, ground acceleration, response of structures, influence of damping, frequency content of ground motion, failure characteristics, and effect of foundation. Recommendations are made for research that would lead to more economic design.
{"title":"Earthquake Research Needs for Nuclear Power Plants","authors":"G. Housner","doi":"10.1061/JPWEAM.0000652","DOIUrl":"https://doi.org/10.1061/JPWEAM.0000652","url":null,"abstract":"The high degree of safety required for nuclear power plants has given prominence to the problems of earthquake-resistant design. Extreme conservatism can lead to overly large factors of safety. Certain aspects of the earthquake design problem are discussed, such as, ground acceleration, response of structures, influence of damping, frequency content of ground motion, failure characteristics, and effect of foundation. Recommendations are made for research that would lead to more economic design.","PeriodicalId":136288,"journal":{"name":"Journal of the Power Division","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126323800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nuclear power stations, due to the consideration of insuring public safety, must be designed to withstand the effects of postulated strong motion earthquakes. A few of the many aspects of a complete seismic analysis are discussed. The loadings on the structures are determined by a dynamic analysis. The mathematical bases for the two most common methods of analysis, the response spectrum method and the time-history method, are presented. A description of an analytical model which includes the torsional response is given. There are a large number of component structures and items of equipment which cannot be included individually in the dynamic analysis of the building structures. A discussion of current methods for determining the dynamic response of these components and a suggested solution of the problem is presented. A discussion of the analysis of piping systems and soil-structure interaction is given.
{"title":"Seismic Analysis of Nuclear Power Plant Structures","authors":"R. N. Bergstrom, S. Chu, R. Small","doi":"10.1061/JPWEAM.0000660","DOIUrl":"https://doi.org/10.1061/JPWEAM.0000660","url":null,"abstract":"Nuclear power stations, due to the consideration of insuring public safety, must be designed to withstand the effects of postulated strong motion earthquakes. A few of the many aspects of a complete seismic analysis are discussed. The loadings on the structures are determined by a dynamic analysis. The mathematical bases for the two most common methods of analysis, the response spectrum method and the time-history method, are presented. A description of an analytical model which includes the torsional response is given. There are a large number of component structures and items of equipment which cannot be included individually in the dynamic analysis of the building structures. A discussion of current methods for determining the dynamic response of these components and a suggested solution of the problem is presented. A discussion of the analysis of piping systems and soil-structure interaction is given.","PeriodicalId":136288,"journal":{"name":"Journal of the Power Division","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133677595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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