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الثلاثاء، 25 مارس، 2014

The Detection of Hydrogen in Metals Using Neutron Interactions

Title:   The Detection of Hydrogen in Metals Using Neutron Interactions
Author         :  Mohamed Hatem Hashem
Collection   :  Ph.D. Nuclear 
Abstract:  
Water is universally present and so is hydrogen. Because of its small atomic size the hydrogen atom can relatively easily diffuse into a host metal and although the metal may appear fine for a while, it will suddenly lose its strength and ductility. Thus, measuring hydrogen content in metals is important in many fields of the nuclear industry to automobiles and aircraft fabrication especially in the offshore oil and gas fields. Nuclear methods for measuring the content of hydrogen in metals have been proven to achieve sensitivity levels of the order of parts per million. By rising the industrial progress toward the employment of computer in order to model the tangible problems by using special software in this field. One such computational software for radiation transport modeling is the Monte Carlo N-Particle (MCNP) radiation transport code. However, no comprehensive document has been written to introduce the use of the MCNP code for simulating the hydrogen concentration in metal problem. This document, a primer, addresses the need of using a neutron source to monitor the hydrogen concentration in the metal in-situ through the basic use of MCNP and its particular application. This is by model an example, the hydrogen atom is distributed along the grain boundaries in steel. The aim that from the example is illustrating the hydrogen concentration relative to neutron counts in the designed setup. These examples along with the instructions for reproducing them are the results of this thesis research.

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