Assessment of neutron dosemeters around standard sources and nuclear fissile objects.
In order to evaluate the neutron doses around nuclear fissile objects, a comparative study has been made on several neutron dosemeters: bubble dosemeters, etched-track detectors (CR-39) and 3He-filled proportional counters used as dose-rate meters. The measurements were made on the ambient and the personal dose equivalents H*(10) and Hp(10). Results showed that several bubble dosemeters should have been used due to a low reproducibility in the measurements. A strong correlation with the neutron energy was also found, with about a 30% underestimation of Hp(10) for neutrons from the PuBe source, and about a 9% overestimation for neutrons from the 252Cf source. Measurements of the nuclear fissile objects were made using the CR-39 and the dose-rate meters. The CR-39 led to an underestimation of 30% with respect to the neutron dose-rate meter measurements. In addition, the MCNP calculation code was used in the different configurations.
Raimondi
N
N
CEA, Centre d'études de Valduc, Service de Protection contre les Rayonnements, Is-sur-Tille, France.
Tournier
B
B
Groetz
J E
JE
Piot
J
J
Riebler
E
E
Crovisier
P
P
Chambaudet
A
A
Cabanné
N
N
D002142:Californium; D005214:Fast Neutrons; D009502:Neutrons; D009680:Nuclear Fission; D019047:Phantoms, Imaging; D011005:Plutonium; D011874:Radiometry / Q000379:methods*; D015203:Reproducibility of Results
D011005:Plutonium; D002142:Californium