Graphite Gamma Scan Results

Mark W. Drigert

关键词: Advanced Graphite Creep;    AGC;    Gamma scan;    Graphite;    irradiation;   

DOI  :  10.2172/1133866
RP-ID  :  INL/EXT-14-31843
PID  :  OSTI ID: 1133866

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

This report documents the measurement and data analysis of the radio isotopic content for a series of graphite specimens irradiated in the first Advanced Graphite Creep (AGC) experiment, AGC-1. This is the first of a series of six capsules planned as part of the AGC experiment to fully characterize the neutron irradiation effects and radiation creep behavior of current nuclear graphites. The AGC-1 capsule was irradiated in the Advanced Test Reactor (ATR) at INL at approximately 700 degrees C and to a peak dose of 7 dpa (displacements per atom). Details of the irradiation conditions and other characterization measurements performed on specimens in the AGC-1 capsule can be found in ???AGC-1 Specimen Post Irradiation Data Report??? ORNL/TM 2013/242. Two specimens from six different graphite types are analyzed here. Each specimen is 12.7 mm in diameter by 25.4 mm long. The isotope with the highest activity was 60Co. Graphite type NBG-18 had the highest content of 60Co with an activity of 142.89 ??Ci at a measurement distance of 47 cm.