Final evaluation of characterizing pipe-over-pack containers using high efficiency neutron counters Page: 6 of 15
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
WM' 09 Conference, March 1-March 5, 2009, Tucson, AZ
Figure 3: High Efficiency Neutron Counter at Los Alamos National Laboratory
High Efficiency, Add-A-Source, Passive Neutron Coincidence Counting Modality
The HENC #2 passive neutron counter employs neutron coincidence and multiplicity counting
of 208-liter drums. The counter utilizes 113 He-3 proportional detectors, divided into 16
detector banks, arranged in a 4-7 geometry about the assay cavity. The nominal assay cavity is
81 cm wide by 86 cm long by 102 cm tall. An Add-A-Source (AAS) Matrix Correction
assembly has been incorporated into the counter for neutron moderation and absorption
The neutron portion of the instrument is calibrated  using NIST-traceable standards to create
a calibration curve that compares the coincidence count rate to the Pu-240 effective mass. The
Pu-240 effective mass is related to the spontaneously fissioning isotopes of plutonium by the
meNt24OEf = 2.52mPu238 +1.Omni,ao + 1.68m m (Eq.1
- -,_ r I
High Elffictu Neutrn Cd
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Carson, Pete; Stanfield, Sean B; Wachter, Joe; Cramer, Doug & Harvill, Joe. Final evaluation of characterizing pipe-over-pack containers using high efficiency neutron counters, article, January 1, 2009; [New Mexico]. (https://digital.library.unt.edu/ark:/67531/metadc931045/m1/6/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.