Download or read book In Situ Calibration of Nuclear Plant Platinum Resistance Thermometers Using Johnson Noise Methods written by and published by . This book was released on 1983 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Calibration of Nuclear Plant Resistance Thermometers Using Johnson Noise Draft written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods have been demonstrated in operating nuclear plants for the in situ calibration of resistance thermometers with agreement between measured noise temperatures and dc calibration temperatures well within these required by the plant. A comparison of the results of Johnson noise power testing results and uncertainties, the requirements for accuracy, and PRT calibration tolerances is shown. The methods use Johnson noise measurements and provide an absolute calibration independent of the prior dc calibration. The methods include techniques for characterization of the installed extension cables and the quantitative determination of induced EMI and its effect on the calibration. The techniques are applicable to ordinary 4-wire platinum resistance thermometers operating over their entire design temperature range and to extension cables of about 100 ft length. Careful attention needs to be paid to the choice or cables, location of terminal boxes, and grounding and shielding practices in the plant installation to achieve comparable results.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
Download or read book EPRI Guide written by and published by . This book was released on 1983 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In situ Technique for Checking the Calibration of Platinum Resistance Thermometers written by and published by . This book was released on 1987 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sixth International Conference on Noise in Physical Systems written by Paul Herman Ernst Meijer and published by . This book was released on 1981 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Innovative Approach to Johnson Noise Thermometry by Means of Spectral Estimation written by Nora Dianne Bull and published by . This book was released on 2016 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumentation in a nuclear power plant is critical in monitoring the stability and safety levels of a reactor. Temperature is a key measurement performed on the core of a reactor to control the power output and sustain a safe thermal margin. If there is a dramatic change in temperature, failure is likely to follow if action is not taken to cool the system. Traditionally, to measure the temperature of a reactor several resistance temperature detectors (RTD)s were placed in predefined locations on the system. RTDs are typically coiled platinum wire wrapped around a ceramic cylinder and encased in a metal sheath. Due to the harsh environment of nuclear reactors, RTDs degrade and their resistance measurements drift over time. This drift in resistance can be misunderstood as a drift in reactor temperature. In the past, RTDs would be serviced every few years either through calibration or replacement. To service RTDs the reactor is shut down, and a person is sent into a dangerous environment. Using Johnson noise thermometry (JNT) will reduce the need for servicing and provide a high-accuracy temperature measurement. JNT is a fundamental expression of temperature that is invulnerable to drift in the RTD's physical condition. The signal processing behind JNT is presented in this document. Spectral estimation methods are used to remove electromagnetic interference (EMI) from the JNT measurement. These methods are unique to this dissertation. The EMI estimation method is modeled and simulation results are presented. The modeling of the EMI estimation involves locating EMI, analyzing EMI effects, and removing EMI without bias. Finally, results from numerical and experimental verification are presented. The research presented here is important to the future of the nuclear industry for several reasons. With this technology applied to existing systems, reactor shut down time can be decreased, technician exposure to dangerous radiation zones is decreased, and the cost associated with lengthy shut downs can be reduced. The instrumentation community will benefit through the innovation of signal processing for very small signal versus noise interference.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Platinum Resistance Thermometer Calibrations written by B. W. Mangum and published by . This book was released on 1987 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Platinum Resistance Thermometry written by John L. Riddle and published by . This book was released on 1973 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The monograph describes the methods and equipment employed at the National Bureau of Standards for calibrating standard platinum resistance thermometers (SPRT) on the International Practical Temperature Scale (IPTS-68).The official text of the scale is clarified and characteristics of the scale are described.Several designs of SPRT's are shown and discussed in the light of the requirements and recommendations on the text of the IPTS-68.Possible sources of error such as those due to the internal and external self-heating effects and the immersion characteristics of SPRT's are described in detail.Precautions and limitations for the mechanical and thermal treatment and for the shipment of SPRT's are indicated, and a guide is given for those desiring the thermometer calibration services of NBS.(Modified author abstract).
Download or read book INIS Atomindeks written by and published by . This book was released on 1985 with total page 1708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In situ Response Time Testing of Platinum Resistance Thermometers in Nuclear Power Plants written by Hashem Mehrdad Hashemian and published by . This book was released on 1977 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Method for In situ Restoration of Plantinum Resistance Thermometer Calibration written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A method is provided for in-situ restoration of platinum resistance thermometers (PRT's) that have undergone surface oxide contamination and/or strain-related damage causing decalibration. The method, which may be automated using a programmed computer control arrangement, consists of applying a dc heating current to the resistive sensing element of the PRT of sufficient magnitude to heat the element to an annealing temperature and maintaining the temperature for a specified period to restore the element to a stress-free calibration condition. The process anneals the sensing element of the PRT without subjecting the entire PRT assembly to the annealing temperature and may be used in the periodic maintenance of installed PRT's.
Download or read book ASME 71 WA TEMP 2 written by Robert P. Benedict and published by . This book was released on 1971 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1985 with total page 1292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
