In-situ gamma-ray assay of the west cell line in the 235-F plutonium fuel form facility

Couture, A. H.¹  Diprete, D.¹ 

[1] Savannah River Site (SRS), Aiken, SC (United States)

关键词: NESDPS Office of Nuclear Energy Space and Defense Power Systems;   

DOI  :  10.2172/1212657
RP-ID  :  SRNL-STI--2014-00440
PID  :  OSTI ID: 1212657

美国|英语

来源: SciTech Connect

【 摘 要 】

On August 29th, 2013, scientists from SRNL took a series of in-situ gamma-ray measurements in the maintenance trench beneath Cells 6-9 on the west line of the PuFF facility using an uncollimated, highpurity germanium detector. The detector efficiency was estimated using a combination of MCNP simulations and empirical measurements. Data analysis was performed using three gamma-rays emitted by Pu-238 (99.85 keV, 152.7 keV, and 766.4 keV) providing three independent estimates of the mass of Pu-238 holdup in each of the cells. The weighted mean of these three results was used as the best estimate of Pu-238 holdup in the West Cell Line of PuFF. The results of the assay measurements are found in the table below along with the results from the scoping assay performed in 2006. All uncertainties in this table (as well as the rest of the report) are given as 1??. The total holdup in the West Cell Line was 2.4 ?? 0.7 grams. This result is 0.6 g higher than the previous estimate, a 0.4?? difference.