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in subjects: "Control Equipment"

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Reviews of ASME Section 11 pump and valve relief requests: Post Generic Letter 89-04

This paper presents a discussion of ASME Section 11 Pump and Valve Inservice Testing relief request reviews by the NRC and their contractors. Topics that will be discussed include the scope of USNRC reviews in Technical Evaluation Reports (TERs) (and Safety Evaluation, SEs); including the basis for granting relief requests, the status of relief requests in IST Program updates, and the Generic Letter 89-04 approval process; and the level of technical detail required in submitted programs. This p… more

Date: January 1, 1992

Creator: DiBiasio, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Solar hot water system installed at Days Inn Motel, Jacksonville, Florida

The solar energy hot water system installed in the Days Inns of America, Inc., Days Inn Motel (120 rooms) I-95 and Cagle Road, Jacksonville, Florida, is described. The solar system was designed by ILI, Incorporated to provide 65 percent of the hot water demand. The system is one of eleven systems planned under this grant. Water (in the Solar Energy Products, Model CU-30ww liquid flat plate collector (900 square feet) system) automatically drains into the 1000 gallon lined and vented steel stora… more

Date: September 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of proposed designs for streamflow monitoring structures at waste disposal sites

Design of small surface water monitoring stations associated with waste sites requires an approach that balances several problems. The monitoring site must have a capacity for a wide range of flows, allow accurate measurements over the full performance range, minimize effects from accumulation of contaminated sediments, and minimize costs of construction and operation. Selecting a station design that takes these factors into consideration can be done systematically through use of formal decisio… more

Date: January 1, 1991

Creator: Clapp, R. B.; Borders, D. M.; Tardiff, M. F. & Huff, D. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Natural convection phenomena in a nuclear power plant during a postulated TMLB' accident

After the TMI (Three Mile Island) accident, there has been significant interest in analyzing and understanding the phenomena that may occur in a PWR (Pressurized Water Reactor) accident which may lead to partial or total core meltdown and degradation. Natural convection is one of the important phenomena. In the present paper the results of two numerical simulations of (1) four-loop PWR and (2) three-loop PWR are presented. The simulations were performed with the COMMIX(2) computer code. Our ana… more

Date: January 1, 1987

Creator: Domanus, H. M.; Schmitt, R. C.; Sha, W. T.; Shah, V. L. & Han, J. T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Superconducting final focus for the SLAC Linear Collider

Triplets composed of superconducting quadrupoles have been built and installed as the final focusing element for the high-energy positron and electron beams of the SLAC Linear Collider. Special features include independent alignment to 100-micron tolerance inside a common cryostat; non-magnetic materials to allow operation inside the detector's solenoid field; a continuous-flow helium-only system using 50-meter-long flexible transfer lines; and complete operation of the system before installati… more

Date: May 1, 1992

Creator: Ash, W.W.; Barrera, F.; Burgess, W.; Cook, K.; Cutler, H.; Ferrie, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Uranium hexafluoride: Safe handling, processing, and transporting: Conference proceedings

This conference seeks to provide a forum for the exchange of information and ideas of the safety aspects and technical issue related to the handling of uranium hexafluoride. By allowing operators, engineers, scientists, managers, educators, and others to meet and share experiences of mutual concern, the conference is also intended to provide the participants with a more complete knowledge of technical and operational issues. The topics for the papers in the proceedings are widely varied and inc… more

Date: January 1, 1988

Creator: Strunk, W.D. & Thornton, S.G. (eds.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The laser switched linac and development of a high brilliance electron source

This task originated in 1987 to explore the possibility of accelerating short bursts of electrons by pulsed power. The principal effort of our group was to demonstrate that electrons can be accelerated by picosecond-long electrical pulses which are compressed in a radial transmission line. This goal has new been achieved and our results are presented in this paper. We have achieved a gradient of 45 MV/m across a 250 {mu}m accelerating gap and have accelerated 10{sup 6} electrons in a 1 ps long … more

Date: September 1, 1991

Creator: Melissinos, A.C.; Bamber, C.; Blalock, T.; Fry, A. & Wilson, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Kilowatt isotope power system. Component test procedure for the ground demonstration system radiator bypass valve

This test procedure provides a detailed description of the verification methods which shall be used in the developmental program to be conducted on the Kilowatt Isotope Power System (KIPS) Radiator Bypass Valve, to fulfill the requirements of the Ground Demonstration System Design Criteria. The test objective is to demonstrate the bypass flow characteristics of the valve as a function of the Jet Condensor Inlet Temperature. To accomplish the test objective the pump discharge temperature (TPO) w… more

Date: April 1, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Diamond-turning tool setting by interferogram analysis

A method was developed to establish a numerically controlled tool path with respect to the work spindle centerline. Particularly adapted to the diamond turning of optics, this method is based upon interferogram analysis and is applicable to the establishment of the work spindle centerline relative to the tool path for any center-turned optic having a well-defined vertex radius of curvature. The application reported is for an f/2 concave spherical mirror.

Date: October 22, 1980

Creator: Rasnick, W.H. & Yoder, R.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Phased-array antenna control by a monolithic photonic integrated circuit, COMPASS

Phased-array antenna systems are well known for rapid beam steering and their ability to bring high power to the target. Such systems are also quite complex and heavy, which have limited their usefulness. The issues of weight, size, power use, and complexity have been addressed through a system named COMPASS (Coherent Optical Monolithic Phased Array Steering System). All phased-array antenna systems need: (1) small size; (2) low power use; (3) high-speed beam steering; and (4) digitally-control… more

Date: January 1, 1991

Creator: Kravitz, S. H.; Hietala, V. M.; Vawter, G. A. & Meyer, W. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Kilowatt Isotope Power System: component test procedure for the ground demonstration system flow control valve. 77-KIP-57

Test procedures to be used to demonstrate the temperature control function, flow control function, and transient response of the Mechanical Flow-Temperature Control Valve in the Kilowatt Isotope Power System are described in detail. (LCL)

Date: July 11, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Critical Technology List update. Final technical report

ICRC has reviewed and updated its List of critical technology. The List comprises all proposed SRC-I Demonstration Plant equipment whose use has been determined to involve some degree of potential safety, performance, or environmental risk. ICRC has subjected equipment on the Critical Technology c to special technical review to ensure the highest possible level of quality and lowest cost commensurate with acceptable overall risks. Equipment or equipment systems still considered to be high risk … more

Date: March 1, 1983

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Near term hybrid passenger vehicle development program. Phase I. Appendices C and D. Final report

The derivation of and actual preliminary design of the Near Term Hybrid Vehicle (NTHV) are presented. The NTHV uses a modified GM Citation body, a VW Rabbit turbocharged diesel engine, a 24KW compound dc electric motor, a modified GM automatic transmission, and an on-board computer for transmission control. The following NTHV information is presented: the results of the trade-off studies are summarized; the overall vehicle design; the selection of the design concept and the base vehicle (the Ch… more

Date: January 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Automatic lighting controls demonstration

The purpose of this work was to demonstrate, in a real building situation, the energy and peak demand reduction capabilities of an electronically ballasted lighting control system that can utilize all types of control strategies to efficiently manage lighting. The project has demonstrated that a state-of-the-art electronically ballasted dimmable lighting system can reduce energy and lighting demand by as least 50% using various combinations of control strategies. By reducing light levels over c… more

Date: March 1, 1990

Creator: Rubinstein, F. & Verderber, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Microwave measurement test results of circular waveguide components for electron cyclotron resonant heating (ECRH) of the Tandem Mirror Experiment-Upgrade (TMX-U)

Development of high-power components for electron cyclotron resonant heating (ECRH) applications requires extensive testing. In this paper we describe the high-power testing of various circular waveguide components designed for application on the Tandem Mirror Experiment-Upgrade (TMX-U). These include a 2.5-in. vacuum valve, polarizing reflectors, directional couplers, mode converters, and flexible waveguides. All of these components were tested to 200 kW power level with 40-ms pulses. Cold tes… more

Date: December 1, 1983

Creator: Williams, C.W.; Rubert, R.R.; Coffield, F.E.; Felker, B.; Stallard, B.W. & Taska, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Molten salt freeze seal. Final report

This report documents the results of the testing performed at Sandia National Laboratory, Albuquerque, New Mexico, on the applicability of a sodium freeze seal type valve stem in a molten salt environment. The freeze seal tests consisted of cycling the valve stem at set temperature intervals, checking the temperature distribution for freeze plug location, and verifying the actuator forces. In addition to the test results, this report also documents the engineering analysis and other tasks perfo… more

Date: August 1, 1985

Creator: Corugedo, J.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Preliminary flashing multiphase flow analysis with application to letdown valves in coal-conversion processes

As part of the Oak Ridge National Laboratory's technical support to large coal liquefaction projects, attempts have been made to (1) develop the methodology for characterizing and predicting multicomponent, multiphase, non-Newtonian flow behavior within letdown valves and devices, and (2) analyze the fluid flow in the entire letdown region of the process. An engineering model that can be used in the analysis of multicomponent, multiphase, flashing, flowing systems has been developed. A pre… more

Date: September 1, 1982

Creator: Ott, L. J. & Khan, A. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

MHD air heater development technology. Progress report, November 26, 1979-March 31, 1980

Work on the development of the directly-fired high temperature air heater (HTAH) for MHD power plants is reported. Progress is reported on three tasks: (1) materials selection, evaluation, and development, (2) operability, performance, and materials testing, and (3) full-scale design concepts. Under Task 1, efforts were carried out in several areas. Work on the computer data base for material properties was begun. Data were compiled for several HTAH materials. Materials selections for Valve Tes… more

Date: May 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Is a 4-train support ''always'' more reliable than a 2-train support

Once the gross features of a frontline fluid system have been defined, one must consider what support system configuration will provide the best overall system performance. This paper considers different dc bus configurations for a given emergency feedwater system. Results indicate that a four-train support system (i.e., 4 dc buses) gives a lower system unavailability for transients, but a higher system unavailability for Anticipated Transients Without Scram (ATWS), than a two-train support sys… more

Date: June 1, 1986

Creator: Guey, C.N.; Arrieta, L. & Youngblood, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Aging assessment of BWR control rod drive systems

This study examines the aging phenomena associated with boiling water reactor (BWR) control rod drive mechanisms (CRDMs) and assess the merits of various methods of managing this aging. Information for this study was acquired from (1) the results of a special CRDM aging questionnaire distributed to each US BWR utility, (2) a first-of-its-kind workshop held to discuss CRDM aging and maintenance concerns, (3) an analysis of Nuclear Plant Reliability Data System (NPRDS) failure cases attributed to… more

Date: January 1, 1991

Creator: Greene, R.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

KIPS kilowatt isotope power system

This Control System topical report covers basic control requirements, selection of control system and a recent review of an electromechanical approach to the flow control valve. Section I covers the basic control requirements for Organic Rankine cycle systems, particular requirements for an isotope fueled space power system, and special requirements imposed by launch, Shuttle deployment and spacecraft requirements. Various control devices which can be used to meet system requirements are discus… more

Date: January 1, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Two phase flow in geothermal systems. Bi-monthly progress report, July 16-September 15, 1985

Preliminary findings of one of the early test runs of two newly constructed quick-closing valves (QCVs) are presented. The purpose was to see whether the QCVs could be activated simultaneously and closed rapidly without causing excessive over-pressure in the test section.

Date: September 1, 1985

Creator: DiPippo, R. & Laoulache, R.N.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Microcomputers for energy conservation in homes and other small buildings

Low cost microcomputers and related microelectric devices now make it practical to apply additional energy conserving control strategies in single-family homes and other small buildings. These conservation measures can make significant contributions toward attainment of national energy conservation objectives. Applications in space conditioning (heating, cooling, ventilation), lighting, electric demand limiting, metering of energy in various forms and for status displays are outlined. Examples … more

Date: January 1, 1980

Creator: Hendrick, A S

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Solar production of industrial process steam for the Lone Star Brewery. Final report

This report outlines the detailed design and system analysis of a solar industrial process steam system for the Lone Star Brewery. The industrial plant has an average natural gas usage of 12.7 MMcf per month. The majority of this energy goes to producing process steam of 125 psi and 353/sup 0/F at about 50,000 lb/h, with this load dropping to about 6000 lb/h on the weekends. The maximum steam production of the solar energy system is about 1700 lb/h. The climatic conditions at the industrial sit… more

Date: June 29, 1979

Creator: Deffenbaugh, D. M.; Watkins, P. V.; Hugg, S. B.; Kulesz, J. J.; Decker, H. E. & Powell, R. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department