1Overview
The Model 971 Food-SSAFE Kit offers customers a faster, more cost-effective alternative to HPGe counting of food and water samples. New processors and shielded detectors combine for state-of-the-art performance in a budget-conscious analysis system. The spectroscopic data is analyzed by the system in real time, providing nuclear contamination information for immediate disposition. Processes may be automated for even greater throughput. An optional CeBr detector (Model 971-1N1C) gives medium resolution spectroscopic back-up data for mission critical applications.
The system fits conveniently into a large hard case and includes the detector, shielding, containers, MCA and computer system. The included software package includes a comprehensive utility for a wide range of sample materials. The flexible system can accommodate liquids and solids and can be modified in the field with limited technical support. It can analyze radiation in foods such as milk, meat, fish, grains, and fruits. Soil, water, fertilizer, and other materials can also be analyzed. Results are presented in Bq/l or Bq/kg depending on the geometry used.
Radioactive material in the sample is detected with a sodium iodide or cerium bromide scintillation probe using a Marinelli geometry for soil, water, and bulk samples or a 2-inch filter geometry for wipes and air samples. Depending on the sampling time and the isotope, the detection limit is approximately 10 Bq/l and can easily identify concentrations of Iodine 131, Cesium 134, and Cesium 137.
2Key Features
- Faster, more cost effective than HPGe counting.
- Real time food and water analysis.
- Entire system in one case.
- Fast identification of Iodine 131, Cesium 134 and Cesium 137.
- Real-time spectroscopic analysis with immediate contamination results, and processes that may be automated for even greater throughput.
- Shielded 2 in by 2 in NaI detector with a Model 970 portable MCA running Food-SSAFE software.
- Marinelli and 2 inch filter geometries for bulk samples and for wipes and air samples.
3Detector & MCA
The primary detector is a 2 in by 2 in NaI detector with a typical FWHM of 7.5%, supplied with a 3 ft C-C cable. An optional 1 in by 1 in CeBr detector (Model 971-1N1C), also with a 3 ft C-C cable, adds a typical FWHM of 4.5% for medium resolution spectroscopic back-up data on mission critical applications.
Spectra are processed by the Model 970 portable MCA running Food-SSAFE software. The detector reads out into the same flexible analyzer described in the Model 970 datasheet, so the kit inherits its channel configuration, peak search, and quantification. Sample display and data entry run on a TDS Nomad 900LE with a bar code scanner and serial boot.
4Specifications
| Parameter | Specification |
|---|---|
| Detector | 2” x 2” NaI Detector w/ 3 ft. C-C Cable; *1” x 1” CeBr Detection w/ 3 ft. C-C Cable |
| Typical FWHM | 7.5% (*4.5% CeBr) |
| Display | TDS Nomad 900LE w/ Bar Code Scanner and Serial Boot |
| Spectrum Analyzer | Model 970 Portable MCA w/ Food-SSAFE Software |
| Detection limit | Approximately 10 Bq/l |
| Identified isotopes | Iodine 131, Cesium 134, Cesium 137 |
| Geometry options | Marinelli geometry for soil, water, and bulk samples; 2-inch filter geometry for wipes and air samples |
| Total Kit Size | 33.30” x 24.40” x 19.30 inches (84.5 x 62 x 49 cm) |
| Total Weight | 110 lbs (49.895 kg) |
Note: An asterisk (*) marks the optional CeBr detector configuration (Model 971-1N1C). A complete training module is available as well.
5Kit Contents & Variants
The Model 971 ships as a complete field kit. The base configuration uses the NaI detector. The CeBr configuration adds a high-resolution detector for harder separations.
| Item | Description |
|---|---|
| Software | Food-SSAFE software on the Model 970 portable MCA |
| Detector | One 2 in x 2 in NaI detector with 3 ft C-C cable |
| Display | TDS Nomad 900LE with Bar Code Scanner and Serial Boot |
| Marinelli beakers | Carries 10 empty Marinelli beakers, model 527G-E |
| Sealing tape | 1 roll 3M-33 black tape for sealing Marinelli |
| Scale | 5000 g tempered digital scale |
| Sampling | Sieve for sample collection; small hand shovel |
| Case | iM3075 Storm Case on wheels |
| Survey meter | palmRAD 907 survey meter |
| Optional detector | 1 in x 1 in CeBr detector with 3 ft C-C cable (Model 971-1N1C) |
| Variant | Configuration |
|---|---|
| Model 971-2G | Food-SSAFE KIT, 2 in x 2 in NaI base configuration |
| Model 971-2G-1C | Food-SSAFE KIT plus CeBr, adds the 1 in x 1 in CeBr detector |
6Applications
The Model 971 is built for Food-SSAFE work, analyzing radiation in food, water, and bulk materials and identifying the isotopes that drive food and environmental contamination.
- Food contamination analysis across milk, meat, fish, grains, and fruits.
- Soil, water, and fertilizer analysis, plus other materials.
- Detection and identification of Iodine 131, Cesium 134, and Cesium 137.
- Wipe and air sample screening using the 2-inch filter geometry.
- Bulk and liquid sample counting using Marinelli geometry, reported in Bq/l or Bq/kg.
7Ordering
| Model | Description |
|---|---|
| Model 971-2G | Food-SSAFE KIT |
| Model 971-2G-1C | Food-SSAFE KIT plus CeBr |
To configure a Model 971, choose the 971-2G base kit or the 971-2G-1C kit with the added CeBr detector, then confirm the geometry set your samples require. For a quote, a demonstration, or help building a food and water screening program, contact Berkeley Nucleonics at info@berkeleynucleonics.com or 800-234-7858.