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Validation of the kinetic model for predicting the composition of chlorinated water discharged from power plant cooling systems

Description: The purpose of this report is to present a validation of a previously described kinetic model which was developed to predict the composition of chlorinated fresh water discharged from power plant cooling systems. The model was programmed in two versions: as a stand-alone program and as a part of a unified transport model developed from consistent mathematical models to simulate the dispersion of heated water and radioisotopic and chemical effluents from power plant discharges. The results of te… more
Date: October 31, 1977
Creator: Lietzke, M. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical effluents surface waters from nuclear power plants. Quarterly progress report. [Copper Toxicity]

Description: The objectives of this research project are three-fold: To obtain data on the behavior of potentially toxic substances introduced into surface waters from nuclear power plants; To determine the impact magnitude of these substances on representative and economically important aquatic species; and To develop models with which to predict the partitioning of these substances among the abiotic aquatic compartments. Results are reported from investigations of copper partitioning in seawater, evaluati… more
Date: October 31, 1977
Creator: Harrison, F.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Material Heat Treatment on Fatigue Crack Initiation in Austenitic Stainless Steels in Lwr Environments.

Description: The ASME Boiler and Pressure Vessel Code provides rules for the design of Class 1 components of nuclear power plants. Figures I-9.1 through I-9.6 of Appendix I to Section III of the Code specify design curves for applicable structural materials. However, the effects of light water reactor (LWR) coolant environments are not explicitly addressed by the Code design curves. The existing fatigue strain-vs.-life ({var_epsilon}-N) data illustrate potentially significant effects of LWR coolant environm… more
Date: July 31, 2005
Creator: Chopra, O. K.; Alexandreanu, B.; Shack, W. J. & Technology, Energy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical Effects Head-Loss Research in Support of Generic Safety Issue 191.

Description: This summary report describes studies conducted at Argonne National Laboratory on the potential for chemical effects on head loss across sump screens. Three different buffering solutions were used for these tests: trisodium phosphate (TSP), sodium hydroxide, and sodium tetraborate. These pH control agents used following a LOCA at a nuclear power plant show various degrees of interaction with the insulating materials Cal-Sil and NUKON. Results for Cal-Sil dissolution tests in TSP solutions, sett… more
Date: October 31, 2006
Creator: Park, J. H.; Kasza, K.; Fisher, B.; Oras, J.; Natesan, K.; Shack, W. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Feasibility Study of Hydrogen Production from Existing Nuclear Power Plants Using Alkaline Electrolysis

Description: The mid-range industrial market currently consumes 4.2 million metric tons of hydrogen per year and has an annual growth rate of 15% industries in this range require between 100 and 1000 kilograms of hydrogen per day and comprise a wide range of operations such as food hydrogenation, electronic chip fabrication, metals processing and nuclear reactor chemistry modulation.
Date: December 31, 2008
Creator: Swalla, Dana R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanisms of Low Dose Radiation-induced T helper Cell Function

Description: Exposure to radiation above levels normally encountered on Earth can occur during wartime, accidents such as those at Three Mile Island and Chernobyl, and detonation of “dirty bombs” by terrorists. Relatively high levels of radiation exposure can also occur in certain occupations (low-level waste sites, nuclear power plants, nuclear medicine facilities, airline industry, and space agencies). Depression or dysfunction of the highly radiosensitive cells of the immune system can lead to serious co… more
Date: October 31, 2008
Creator: Gridley, Daila S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Applications of neural networks to monitoring and decision making in the operation of nuclear power plants. Summary

Description: Application of neural networks to monitoring and decision making in the operation of nuclear power plants is being investigated under a US Department of Energy sponsored program at the University of Tennessee. Projects include the feasibility of using neural networks for the following tasks: (1) diagnosing specific abnormal conditions or problems in nuclear power plants, (2) detection of the change of mode of operation of the plant, (3) validating signals coming from detectors, (4) review of ``… more
Date: December 31, 1990
Creator: Uhrig, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The role of the LLNL Atmospheric Release Advisory Capability in a FRMAC response to a nuclear power plant incident

Description: The Federal Radiological Emergency Response Plan (FRERP) can provide several emergency response resources in response to a nuclear power plant (NPP) accident if requested by a state or local agency. The primary FRERP technical resources come from the US Department of Energy`s (DOE) Federal Radiological Monitoring and Assessment Center (FRMAC). Most of the FRMAC assets are located at the DOE Remote Sensing Laboratory (RSL) at Nellis Air Force Base, Las Vegas, Nevada. In addition, the primary atm… more
Date: December 31, 1994
Creator: Baskett, R. L.; Sullivan, T. J.; Ellis, J. S. & Foster, C. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Harmonic effects of solar geomagnetically induced currents on the electrical distribution system in nuclear power plants

Description: Most previous analysis on the effects of geomagnetically induced currents (GIC) on electric utility systems has steady-state phenomena, with the main interest in the generator step-up transformer and the off-site power system. This paper begins to investigate the possible effects that a GIC event might have on the power plant itself, by examining the harmonic distortion that could exist at various voltage levels in the on-site distribution system.
Date: December 31, 1992
Creator: Carroll, D. P.; Kasturi, S.; Subudhi, M. & Gunther, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Issues arising with the application of optical fiber transmission in class 1E systems in nuclear power plants

Description: The application of fiber optic links and networks in safety-critical systems in the next generation of nuclear power plants, as well as in some digital upgrades in present-day plants, will mean that these links must be highly reliable and able to withstand the effect of environmental stressors present at the installation location. This paper discusses the failure modes and age-related mechanisms of fiber optic transmission components and identifies environmental stressors that could adversely a… more
Date: December 31, 1993
Creator: Korsah, K. & Antonescu, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Nuclear economics: Issues and facts

Description: Nuclear economics has become on the more prominent topics related to nuclear power. Beyond the subjects of nuclear safety and waste disposal, questions and concerns of nuclear power economics have emerged with growing frequency in utility board rooms, in state and federal regulatory proceedings, and in the media. What has caused nuclear power economics to become such a popular topic? This paper addresses issues and facts related to historical nuclear plant costs, new nuclear plant projections, … more
Date: December 31, 1993
Creator: Hudson, C. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Robot arm apparatus

Description: A robot arm apparatus is provided for inspecting and/or maintaining an interior of a steam generator which has an outside wall and a port for accessing the interior of the steam generator. The robot arm apparatus includes a flexible movable conduit for conveying inspection and/or maintenance apparatus from outside the steam generator to the interior of the steam generator. The flexible conduit has a terminal working end which is translated into and around the interior of the steam generator. Th… more
Date: December 31, 1990
Creator: Nachbar, H. D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Accident information needs

Description: A Five-step methodology has been developed to evaluate information needs for nuclear power plants under accident conditions and the availability of plant instrumentation during severe accidents. Step 1 examines the credible accidents and their relationships to plant safety functions. Step 2 determines the information personnel involved in accident management will need to understand plant behavior. Step 3 determines the capability of the instrumentation to function properly under severe accident… more
Date: December 31, 1992
Creator: Hanson, D. J.; Arcieri, W. C. & Ward, L. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Nuclear power plant status diagnostics using artificial neural networks

Description: In this work, the nuclear power plant operating status recognition issue is investigated using artificial neural networks (ANNs). The objective is to train an ANN to classify nuclear power plant accident conditions and to assess the potential of future work in the area of plant diagnostics with ANNS. To this end, an ANN was trained to recognize normal operating conditions as well as potentially unsafe conditions based on nuclear power plant training simulator generated accident scenarios. These… more
Date: December 31, 1991
Creator: Bartlett, E. B. & Uhrig, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Implications of an HRA framework for quantifying human acts of commission and dependency: Development of a methodology for conducting an integrated HRA/PRA

Description: To support the development of a refined human reliability analysis (HRA) framework, to address identified HRA user needs and improve HRA modeling, unique aspects of human performance have been identified from an analysis of actual plant-specific events. Through the use of the refined framework, relationships between the following HRA, human factors and probabilistic risk assessment (PRA) elements were described: the PRA model, plant states, plant conditions, PRA basic events, unsafe human actio… more
Date: December 31, 1993
Creator: Barriere, M. T.; Luckas, W. J.; Brown, W. S.; Cooper, S. E.; Wreathall, J. & Bley, D. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Applications and extensions of degradation modeling

Description: Component degradation modeling being developed to understand the aging process can have many applications with potential advantages. Previous work has focused on developing the basic concepts and mathematical development of a simple degradation model. Using this simple model, times of degradations and failures occurrences were analyzed for standby components to detect indications of aging and to infer the effectiveness of maintenance in preventing age-related degradations from transforming to f… more
Date: December 31, 1991
Creator: Hsu, F.; Subudhi, M.; Samanta, P. K. & Vesely, W. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Handbook of methods for risk-based analysis of Technical Specification requirements

Description: Technical Specifications (TS) requirements for nuclear power plants define the Limiting Conditions for Operation (LCOs) and Surveillance Requirements (SRs) to assure safety during operation. In general, these requirements were based on deterministic analysis and engineering judgments. Experiences with plant operation indicate that some elements of the requirements are unnecessarily restrictive, while others may not be conducive to safety. Improvements in these requirements are facilitated by th… more
Date: December 31, 1993
Creator: Samanta, P. K. & Vesely, W. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effects of different SSI parameters on the floor response spectra of a nuclear Reactor Building

Description: The effects of several critical soil-structure interaction (SSI) parameters on the floor response spectra (FRS) of a typical nuclear Reactor Building have been examined. These parameters are deconvolution effects (reductions in ground motion with depth), strain dependency of soil dynamic properties and calculation of impedance functions using different approaches. The significant conclusions of the study, which are applicable to a deeply embedded very rigid nuclear Reactor Building, are as foll… more
Date: December 31, 1991
Creator: Kabir, A. F.; Maryak, M. E. & Malik, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design inputs document: Boiling behavior during flow instability

Description: The coolant flow in a nuclear reactor core under normal operating conditions is kept as a subcooled liquid. This coolant is evenly distributed throughout the multiple flow channels with a uniform pressure profile across each coolant flow channel. If the coolant flow is reduced, the flow through individual channels will also decrease. A decrease in coolant flow will result in higher coolant temperatures if the heat flux is not reduced. When flow is significantly decreased, localized boiling may … more
Date: December 31, 1991
Creator: Coutts, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Screening criteria for the verification of seismic adequacy of piping systems

Description: This paper describes practical screening criteria to be used by engineering walkdown teams, for the evaluation of seismic adequacy of piping systems. The application of the screening criteria to a nuclear facility are described and compared to the results achieved using conventional analytical techniques. 13 refs.
Date: December 31, 1991
Creator: Antaki, G. A.; Hardy, G. & Rigamonti, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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