Download or read book Neutron Dosimetry Studies at the Lawrence Livermore Laboratory written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Work performed since the last Workshop meeting is summarized. The studies have been divided into the following sections: (1) response of albedo neutron dosimeters to low energy neutrons; (2) discussion of dose-equivalent conversion factors; (3) modification of the A-B remmeter; (4) the effect of distance from the body on the response of albedo neutron dosimeters; (5) comparison of albedo neutron dosimeter techniques; and (6) modified NAD badge for additional beta shielding and albedo neutron dosimetry.
Download or read book Studies of Neutron Dosimetry at the Lawrence Livermore Laboratory written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Dosimetry Studies at LLL written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Personnel Neutron Dosimetry Studies at the Lawrence Livermore National Laboratory written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to determine the effect of phantom size, shape and composition on the response of an albedo neutron dosimeter. The most important feature was the shape. The dose equivalent rate from a californium neutron source was determined. Ten different dose rates were determined which varied from 2.39 to 3.02 rem/h for the CF source used. (ACR).
Download or read book Albedo neutron Dosimetry Studies at Lawrence Livermore Laboratory written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarized studies performed since the last workshop meeting. The studies have been divided into four sections: (1) the relative response of Hankins-type albedo-neutron dosimeters made of cadmium and boron; (2) the effect of distance from the body on the response of albedo-neutron dosimeters; (3) the use of the ratio of the top to bottom TLDs to determine the calibration factor for albedo-neutron dosimeters; and (4) neutron survey at a power reactor and at a neutron radiography facility.
Download or read book Neutron Dosimetry 14 MeV for Foil Samples Irradiated with the Lawrence Livermore Laboratory Rotating Target Neutron Source written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Personnel Neutron Dosimetry Studies at the Lawrence Berkeley Laboratory written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Personnel Neutron Dosimetry Using Electrochemically Etched CR 39 Foils written by Dale E. Hankins and published by . This book was released on 1989 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of 1 B LOADED Plastic in Personnel Neutron Dosimetry written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Passive Dosimeters Other Than Film and TLDs thermoluminescent Dosimeter written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This presentation will describe CR-39 plastic as a personnel neutron dosimeter. Recent research at LLNL and elsewhere has resulted in the development of a dosimetry system that is superior to any personnel neutron dosimeter previously available. The author describes the features of the dosimetry system and the new etching procedures and techniques in detail. Most of the research was done at the LLNL and has been supported as a part of the DOE Neutron Dosimetry Upgrade Program. 10 refs., 4 figs., 1 tab.
Download or read book Second AEC Workshop on Personnel Neutron Dosimetry written by and published by . This book was released on 1971 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The LLNL CR 39 Personnel Neutron Dosimeter written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We developed a personnel neutron dosimetry system based on the electrochemical etching of CR-39 plastic at elevated temperatures. The doses obtained using this dosimeter system are more accurate than those obtained using other dosimetry systems, especially when varied neutron spectra are encountered. This CR-39 dosimetry system does not have the severe energy dependence that exists with albedo neutron dosimeters or the fading and reading problems encountered with NTA film. 3 refs., 4 figs.
Download or read book Evaluation of the Neutron Dose Received by Personnel at the LLNL written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared to document the techniques being used to evaluate the neutron exposures received by personnel at the LLNL. Two types of evaluations are discussed covering the use of the routine personnel dosimeter and of the albedo neutron dosimeter. Included in the report are field survey results which were used to determine the calibration factors being applied to the dosimeter readings. Calibration procedures are discussed and recommendations are made on calibration and evaluation procedures.
Download or read book Neutron Personnel Dosimetry written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The current state-of-the-art in neutron personnel dosimetry is reviewed. Topics covered include dosimetry needs and alternatives, current dosimetry approaches, personnel monitoring devices, calibration strategies, and future developments. (ACR).
Download or read book Personnel Neutron Dosimetry written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited transcript of a presentation on personnel neutron discusses the accuracy of present dosimetry practices, requirements, calibration, dosemeter types, quality factors, operational problems, and dosimetry for a criticality accident. 32 figs. (ACR).
Download or read book Dosimetry Measurements of X ray and Neutron Radiation Levels Near the Shuttle and End Beam Dump at the Advanced Test Accelerator written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron beams as a source of directed energy are under study at the Lawrence Livermore National Laboratory (LLNL). An intense 10-kA, 50-MeV, 50-ns full-width half-maximum, pulsed electron beam is generated by the prototype Advanced Test Accelerator (ATA) at the Laboratory's Site 300. Whenever the electron beam is stopped in materials, intense radiation is generated. Estimates based on available data in the literature show that for materials such as lead, photon radiation (x ray, gamma, bremsstrahlung) levels can be as large as 104 roentgens per pulse at 1 m in the zero-degree direction (i.e., the electron-beam direction). Neutrons, which are emitted isotropically, are produced at a level of 1013 n/m2 per pulse. Depending upon the number of pulses and the shielding geometry, the accumulated dose is potentially lethal to personnel and potentially damaging to instrumentation that may be used for diagnostics. To provide shielding for minimizing the risk of exposure to personnel and radiation damage to instrumentation, it is important to determine the x-ray and neutron radiation environment near beamline components such as the beam shuttle dump and beam stop. Photon and neutron dosimetry measurements were performed around the beam shuttle dump on January 9, 1985, and near the carbon beam stop at the end of the beamline before the entrance to the diagnostic tunnel on April 12 and December 23, 1985. These measurements together with simple rule-of-thumb estimates and Monte Carlo electron-photon shower calculations of the absorbed dose are presented in this report. 17 refs., 14 figs., 13 tabs.
Download or read book LLL Special Projects Division Research in Neutron Measurements Techniques written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
