LNF:Technology: Difference between revisions
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[[File:Nayade3.png|200px|thumb|right|NAYADE]] | [[File:Nayade3.png|200px|thumb|right|NAYADE]] | ||
For gamma | For gamma-ray irradiation studies CIEMAT possesses a Co-60 facility with unrestricted access. This permits extended temporal irradiation studies. The Nayade facility is a pool-type facility (1.2 m wide by 4.5 m deep) that uses water as the biological shield. This provides shielding for about 100,000 Ci of Co-60. Safety control is achieved through water level monitoring, radiation detectors, and water purity control by pH and conductivity measurements. The use of water as a biological shield also allows direct vision for positioning the sources and extracting of samples in different chambers. | ||
[[File:Nayade6.png|200px|thumb|right|Irradiation Camara]] | [[File:Nayade6.png|200px|thumb|right|Irradiation Camara]] | ||
Main irradiation characteristics: | |||
*Type of source | *Type of source: 12 Co-60 cylindrical sources (15 mm diam. x 135 mm long) are distributed in a circle to provide an inner cylindrical irradiation volume. | ||
*Two distributions are available: | *Two distributions are available: High flux; ≤ 8.3 103Gy/h within a 60mm diam. x 100 mm high volume. Low flux; ≤ 1.2x102 Gy/h within a 200 mm diam. x 100 mm high volume (in the low flux configuration the sources can be rotated along an outer circle for uniform dose). | ||
* | *Irradiation at controlled temperatures and atmospheres, together with in-situ testing of electrical properties, is also possible. | ||
* | *Irradiation can be carried out at controlled temperature up to 300ºC. Gas flow (such as dry air or nitrogen) can be used during irradiation to minimize humidity. The uncertainty in the dose rate is better than 20% for a volume of about 283 cm3. | ||
Irradiation rigs | Irradiation rigs to perform in-situ measurements at different dose rates and under different conditions are routinely fabricated at Ciemat workshops. Sensors, cabling, laboratory equipment, feedthroughs, and environmental monitors (temperature, pressure, humidity, radiation) are available. | ||
*Dosimetry system | *Dosimetry system |