Search for dissertations about: "pulsed neutron activation"

Found 4 swedish dissertations containing the words pulsed neutron activation.

2. 1. Pulsed Neutron Activation for Determination of Water Flow in Pipes

   Author : Håkan Mattsson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Flowmeter; Pulsed Neutron Activation; CFD; Pipe flow; PNA;

   Abstract : In a Pulsed Neutron Activation (PNA) flowmeter neutron induced activity is used to measure water flow in pipes. The water in the pipe is bombarded with neutron pulses which introduce activity into the pipe. The activity is then transported and mixed with the flow. READ MORE

4. 2. A Study of Using Pulsed Neutron Activation for Accurate Measurements of Water Flow in Pipes

   Author : Per Lindén; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; pulsed neutron activation; turbulent flow; neural networks; pipe flow; flow measurements; eddy diffusion; time averaging;

   Abstract : The objectives of this work were 1) to investigate the performance of the pulsed neutron activation (PNA) method for determination of mass flow of water in pipes, and 2) to improve the accuracy such that an error less than 1% become possible with the PNA method. The ultimate purpose is to develop this method into a high-accuracy portable and non-intrusive flow-meter that easily can be used as a calibration tool at a number of field applications, e. READ MORE

5. 3. Water flow measurement with the pulsed neutron activation method

   Author : Per Lindén; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : .... READ MORE

6. 4. Developments in Pulsed Neutron Activation for Determination of Water Flow in Pipes

   Author : Håkan Mattsson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : .... READ MORE