Bøger af D W Mitchell

This report presents key results of a research and development project to validate new techniques for on-line testing of calibration drift in the process instrumentation channels of nuclear power plants. These techniques generally involve a computer-based data acquisition and data analysis system to trend the output of a large number of instrument channels and identify the channels that have drifted out of tolerance. The authors demonstrate that replacing conventional surveillance tests with on-line testing promotes plant efficiency by helping to limit calibration to those channels that actually need it.

This report provides key results from a 30-month research and development project to study the effects of normal aging on the calibration and response time of nuclear plant pressure, level, and flow transmitters and to develop and validate new methods for testing the performance of the transmitters as installed in nuclear power plants. The project focused on aging tests of complete transmitter assemblies and critical transmitter components; testing the effects of sensing-line length, blockages, and voids on pressure sensor response time; investigating the oil loss phenomenon in Rosemount and other transmitters; validating new methods for on-line testing of pressure transmitter response time; investigating on-line detection of oil loss in Rosemount transmitters; and analyzing Licensee Event Report and Nuclear Plant Reliability Data System databases for pressure sensor failures in nuclear power plants. The authors demonstrated that the practice of response time testing and calibration once every 18 to 24 months is adequate for managing the normal aging of pressure transmitters.

Ten Years In The United States: Being An Englishman�������s View Of Men And Things In The North And South is a book written by D.W. Mitchell. The book is a first-hand account of the author's experiences during his ten years stay in the United States. The author, being an Englishman, provides a unique perspective on the political, social, and cultural aspects of life in the North and South.The book covers a wide range of topics, including the American Civil War, slavery, the Reconstruction era, and the political landscape of the time. The author also provides detailed descriptions of the people he met, the places he visited, and the events he witnessed during his stay in the United States.The book is written in a clear and concise style, making it easily accessible to readers of all ages and backgrounds. It is a valuable resource for anyone interested in American history, politics, and culture, and provides a fascinating insight into the United States during a pivotal period in its history.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.