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Title: Gamma-Ray Hold-up Measurements and Results for Casa 2 and Casa 3 at TA-18

Numerous critical assembly experiments were performed at TA-18 beginning in the 1940’s. Several buildings, Casa 2 and Casa 3, were constructed to house these experiments. All gamma-ray hold-up measurements and analysis were performed for Casa 2 and Casa 3 in November/December 2015 to support decommissioning and demolition of the facilities. A technique called room hold-up was used to measure the nuclear materials. A grid pattern was laid out on the large room floor approximately every 9-10 feet. A three- to five-minute measurement was taken with a high-purity germanium (HPGe) detector at each location. Also, several measurements were taken in two storage vaults of Casa 3. A calibration check of the detectors showed that the efficiency and energy scale were stable. The final results of the hold-up measurements for Casa 2 and 3 are given.
Authors:
 [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
1241650
Report Number(s):
LA-UR--16-21542
TRN: US1600903
DOE Contract Number:
AC52-06NA25396
Resource Type:
Technical Report
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Intelligence and Counterintelligence (IN)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 61 RADIATION PROTECTION AND DOSIMETRY; GAMMA DOSIMETRY; HIGH-PURITY GE DETECTORS; ZERO POWER REACTORS; CALIBRATION; DECOMMISSIONING; DEMOLITION; EFFICIENCY; NUCLEAR FACILITIES; LANL; BUILDINGS; RADIOACTIVITY