Final evaluation of characterizing pipe-over-pack containers using high efficiency neutron counters Page: 5 of 15
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WM' 09 Conference, March 1-March 5, 2009, Tucson, AZ
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Figure 2: 12 inch pipe component from the CH-TRAMPAC Rev. 2 .
The waste placed in POC containers was produced at the Los Alamos National
Laboratory. For a complete evaluation of the technique different types of waste streams
were tested. One of the waste streams consisted of mainly Pu-238 by mass. Another
stream consisted of primarily Pu-239 by mass with some of the waste containing a large
amount of Am-241. Other radionuclides can also be present in the material in significant
amounts such as Np-237, but the main contributors to the activity will be either Pu-238,
Am-241 or Pu-239.
NDA METHODS USED TO MEASURE PIPE OVERPACK CONTAINERS
The LANL HENC (HENC #2), shown in Figure 3, is a hybrid NDA instrument based on
the High Efficiency Neutron Counter (HENC) with an integrated gamma system. The
HENC was not originally designed to house a gamma-ray spectroscopy system. The
design was modified in order to improve the capability of the instrument. With the added
capability the system integrates the two NDA counting modes: passive neutron and
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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/m1/5/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.