Symposium on International Safeguards: Linking Strategy, Implementation and People - IAEA CN-220

Session

NDA Measurements III: Neutron Measurements

32 NDA3

24 Oct 2014, 09:00

M Building

Conveners

NDA Measurements III: Neutron Measurements

• Anne-Laure Weber (France)
• Martyn Swinhoe (USA)

NDA Measurements III: Neutron Measurements

• Anne-Laure Weber (France)
• Martyn Swinhoe (USA)

329. Performance of Boron-10 based Neutron Coincidence Counters

Mathieu Boucher (General Electric Reuter-Stokes)

24/10/2014, 09:10

oral

Helium-3 gas-filled detectors have been used in neutron coincidence counting for non-destructive assay for over 30 years. With the current shortage of 3He gas, GE’s Reuter-Stokes business developed a 10B lined proportional counter and a 10B hybrid coincidence counter, in which a small amount of 3He is added to a 10B detector to enhance the neutron sensitivity. GE’s Reuter-Stokes business...

335. Development of a Pulse-Train Recorder for Safeguards

József Huszti (Centre for Energy Research, Budapest, Hungary)

24/10/2014, 09:30

oral

A list-mode pulse-train recorder, PTR-32HV has been developed by the Hungarian Centre for Energy Research. The hardware has been authorized by the IAEA for safeguards applications. The finished unit provides 32 input channels, high voltage output, low-voltage output and is controlled over a USB port. Each input channel can be used independent or in sum for neutron multiplicity analysis....

299. Application of 10B Lined Proportional Counters to Traditional Neutron Counting Applications in International Safeguards

Robert McElroy (Oak Ridge National Laboratory)

24/10/2014, 09:50

oral

Many neutron detection techniques are under consideration as replacement for 3He proportional tube in international safeguards applications. The traditional 10B-lined proportional tube is a commercial off the shelf (COTS) technology for neutron detection that pre-dates the development of 3He detectors. This long history of use of these detectors in neutron counting facilitates modeling, design...

227. Monte Carlo Modeling and Experimental Evaluation of a 6LiF:ZnS(Ag) Test Module for Use in Nuclear Safeguards Neutron Coincidence Counting Applications

Geraint Dermody (Symetrica)

24/10/2014, 10:10

oral

This paper summarizes the Monte Carlo modeling, prototype construction, calibration and characterization of a 3He-free neutron detection test module consisting of several compact 6LiF:ZnS(Ag) thermal neutron absorbers in a moderating slab configuration. In order to determine the suitability of the test module for implementation in a nuclear safeguards coincidence counter, safeguards-relevant...

202. Development of the Single Chip Shift Register (SCSR) for Neutron Coincidence and Multiplicity Analysis

Matthew Newell (LANL)

24/10/2014, 11:00

oral

The Single Chip Shift Register (SCSR) is designed to be a very simple, low cost, and very robust data acquisition circuit board that can be used with any neutron coincidence or multiplicity counter. Safeguards systems used in neutron detection presently require a detector/amplifier combination along with a data acquisition system that converts pulse streams into histograms of correlated...

114. Development of Advanced MOX Holdup Measurement Technology for Improvement of MC&A and Safeguards

Hironobu Nakamura (Japan Atomic Energy Agency)

24/10/2014, 11:20

oral

The Distributed Source-Term Analysis (DSTA) technique has been used in a variety of safeguards applications to determine location and quantity of material contained within large sample volumes. The DSTA method can provide user with knowledge of the location of neutron-producing materials and magnitude of the localized activity. By applying this method, JAEA developed two different neutron...

129. Fresh PWR Assembly Measurements with a New Fast Neutron Collar

Martyn Swinhoe (Los Alamos National laboratory)

24/10/2014, 11:40

oral

The primary tool for the physical verification of LWR fresh fuel assemblies is the neutron collar [1]. In order to minimize the dependence on the operator’s declaration for poison fuel rods, it can be operated in fast mode. Until now, measurements in this mode were time-consuming, taking ~ 1hr for reasonable precision. In order to improve this performance a new collar for PWR assemblies, still...

296. Position-Sensitive Organic Scintillation Detectors for Nuclear Material Accountancy

Jason Newby (Oak Ridge National Laboratory)

24/10/2014, 12:00

oral

Recent years have seen renewed interest in fast organic scintillators with pulse shape properties that enable neutron-gamma discrimination, in part because of the present shortage of He-3, but primarily because of the diagnostic value of timing and pulse height information available from such scintillators. Effort at Oak Ridge National Laboratory (ORNL) associated with fast organic...