Promethee: An alpha low level waste assay system using passive and active neutron measurement methods

被引：4
|
作者：
Passard, C [1 ]
Mariani, A
Jallu, F
Romeyer-Dherbey, J
Recroix, H
Rodriguez, M
Loridon, J
Denis, C
Toubon, H
机构：
[1] French Atom Energy Commiss, DED, SCCD, LDMN, F-13108 St Paul Les Durance, France
[2] COGEMA, F-78141 Velizy Villacoublay, France
来源：
NUCLEAR TECHNOLOGY | 2002年 / 140卷 / 03期
关键词：
neutron measurement; fissile matter; detection limit;
D O I：
10.13182/NT02-A3341
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The development of a passive-active neutron assay system for alpha low level waste characterization at the French Atomic Energy Commission is discussed. Less than 50 Bq[alpha] (about 50 mug Pu) per gram of crude waste must be measured in 118-l "European" drums in order to reach the requirements for incinerating wastes. Detection limits of about 0.12 mg of effective Pu-239 in total active neutron counting, and 0.08 mg of effective Pu-239 coincident active neutron counting, may currently be detected (empty cavity, measurement time of 15 min, neutron generator emission of 1.6 x 10(8) s(-1) [4pi]). The most limiting parameters in terms of performances are the matrix of the drum-its composition (H, Cl...), its density, and its heterogeneity degree-and the localization and self-shielding properties of the contaminant.
引用
收藏
页码：303 / 314
页数：12
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