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in creator/contributor: "Clapp, N.E. Jr."  
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Reducing the size of a data base by using pattern-recognition techniques

Description: An on-line surveillance system at a nuclear power plant samples data and calculates the power spectral density. A method of reducing the amount of stored data by screening the data using a pattern recognition technique was developed. The system stores only the spectra that differ from normal, plus the corresponding plant operating conditions. 7 figures.
Date: January 1, 1982
Creator: Clapp, N. E., Jr.
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Partner: UNT Libraries Government Documents Department
open access

Advances in automated noise data acquisition and noise source modeling for power reactors

Description: A newly expanded program, directed toward achieving a better appreciation of both the strengths and limitations of on-line, noise-based, long-term surveillance programs for nuclear reactors, is described. Initial results in the complementary experimental (acquisition and automated screening of noise signatures) and theoretical (stochastic modeling of likely noise sources) areas of investigation are given.
Date: January 1, 1981
Creator: Clapp, N. E., Jr.; Kryter, R. C.; Sweeney, F. J. & Renier, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Application of expert systems to heat exchanger control at the 100-megawatt high-flux isotope reactor

Description: The High-Flux Isotope Reactor (HFIR) is a 100-MW pressurized water reactor at the Oak Ridge National Laboratory. It is used to produce isotopes and as a source of high neutron flux for research. Three heat exchangers are used to remove heat from the reactor to the cooling towers. A fourth heat exchanger is available as a spare in case one of the operating heat exchangers malfunctions. It is desirable to maintain the reactor at full power while replacing the failed heat exchanger with the spare.… more
Date: January 1, 1985
Creator: Clapp, N. E., Jr.; Clark, F. H.; Mullens, J. A.; Otaduy, P. J. & Wehe, D. K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Safety and licensing analyses for the Fort St. Vrain HTGR

Description: The ORNL safety analysis program for the HTGR includes development and verification of system response simulation codes, and applications of these codes to specific Fort St. Vrain reactor licensing problems. Licensing studies addressed the oscillation problems and the concerns about large thermal stresses in the core support blocks during a postulated accident. Other work includes proposed experiment planning, TMI action plan applicability studies, and a new siting study on the 2240 MW(th) HTGR… more
Date: January 1, 1982
Creator: Ball, S. J.; Conklin, J. C.; Harrington, R. M.; Cleveland, J. C. & Clapp, N. E., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Advances in noise analysis for nuclear plant surveillance and diagnostics

Description: An automated surveillance and baseline noise signature acquisition system is being demonstrated at Sequoyah-1. A nonperturbing method is also being developed for monitoring the subcritical reactivity during initial core loading in LWRs, in fuel storage and processing facilities, and during postaccident recovery operations such as Three Mile Island-2. (DLC)
Date: January 1, 1980
Creator: Fry, D. N.; Clapp, N. E., Jr.; Sides, W. H., Jr.; Mihalczo, J. T. & King, W. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Use of communication architecture test bed to evaluate data network performance

Description: Local area networks (LANs) are becoming more prevalent in nuclear power plants. Traditionally, LANs were only used as information highways, providing office automation services. LANs are now being used as data highways for applications in plant data acquisition and control systems. A communication architecture test bed, which contains network simulators, is needed to allow network performance studies and to resolve design issues prior to equipment purchase. Two levels of granularity of simulati… more
Date: October 1, 1994
Creator: Clapp, N. E., Jr.; Swail, B. K. & Naser, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling and analyzing non-seizure EEG data for patients with epilepsy

Description: We present nonlinear analysis of non-seizure electroencephalogram (EEG) time series data from four epileptic patients. A non-seizure state is a period that is free of any part of an epileptic seizure, including the transition to a fully developed episode. EEG measurements are typically contaminated with a large amount of non- neurophysiological source information, generally called artifact, which arises, for example, from eye movement, muscle tension, and physical motion. The first objective of… more
Date: May 1, 1996
Creator: Lawkins, W. F.; Clapp, N. E., Jr.; Daw, C. S.; Hively, L. M.; Protopopescu, V. & Eisenstadt, M. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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