Deliverables:
The high-resolution gamma spectrometer and LN2 recycler system (later to be known as the equipment) will be used for the verification and determination of gamma emitting radionuclides in different sources and materials. The system is going to be used in the analysis of environmental (soil, water, air filter, etc.) and radioactive waste characterization (solid or liquid) samples in different geometries such as 10 mL rounded plastic tube, disk and cylindrically shaped sources and in variable (low to high) count-rate. The equipment must include a LN2 recycler system.
Mandatory Requirements:
Gamma counter with LN2 recycler cryostat
1. The proposal must include all equipment, software and services listed in this proposal (turn-key solution). A single contract will be awarded to the top ranked proponent for all equipment, software and services listed within the tender documentation.
2. Technical requirements
2.1 The solution must include a high purity detector for high absolute counting efficiency and low-level gamma ray spectroscopy with an energy range of 40 keV-10 MeV, or better. The detector must also be in a near 4π geometry for maximum absolute counting efficiency.
2.2 The solution must include a low background detector accompanied by an oxygen-free high conductivity (OFHC) copper endcaps with low-background, high purity aluminum well tubes. Low background means minimal contribution to the background from the detector materials. Average background count of 3.3 counts/1000sec/KeV at 100 KeV for IEEE efficiency of 100%.
2.3 The solution must include an advanced efficiency calibration software to reduce data processing time; include spectral analysis software with test results such as V&V (Verification and Validation) and produce certificates of validation;
2.4 Detector shielding to be graded shield of lead, thickness of 10 cm or greater, with Sn (or Cd) and Cu sheets to prevent interference by lead X-rays, or other accepted equivalent by the University.
2.5 The software must provide accurate identification and quantification of radioactive material through, at a minimum, accurate system calibration and analysis settings, robust peak search and fit algorithms, and a variety of corrections for background, peak interferences, attenuation, and reporting units.
2.6 The system must include calibration software that provides an advanced efficiency calculation for the detector by combining the measured efficiency of a known reference configuration and solid angle models to derive the efficiency for different containers, sample materials, and sample positions.
2.7 Must include a desktop, including all necessary peripherals (mouse, keyboard, monitor, etc) and Windows 11. The setup must be capable of running all of the software and equipment provided.
2.8 The proposed solution must include a liquid nitrogen (LN2) recycling system; including a compatible detector and vertical dipstick cryostat. The system must also feature an automatic shutdown of the detector`s high voltage in case of detector warm-up.
2.9 The recycling system must include a Liquid Nitrogen Level Monitor/Controller; including a remote display, a storage vessel, all necessary tubes and fittings as well as any other accessories/components required.
3. Functional and Performance Requirements
3.1 The proposed solution must achieve an energy range of 40 keV-10MeV, or better.
3.2 The proposed solution must be capable of achieving the following energy resolutions:
At Full Width Half Maximum: 1.1 keV @ 122keV, or better.
At Full Width Half Maximum (FWHM): 2.0 keV @1333keV, or better.
The ratio of the FWTM (Full Width at 10% of maximum) over the FWHM (Full Width at Half Maximum) is a maximum of 1.9
The ratio of the FWFM (Full Width at Fiftieth Maximum) over the FWHM (Full Width at Half Maximum) is a maximum of 2.5
3.3 The relative efficiency must be at least 40% at 1333 KeV
3.4 Peak-to-Compton Ratio must be a minimum of 62:1.
4. LN2 Recycler System
4.1 The system must be capable of remaining in a steady, uninterrupted state for a minimum of 2 years without requiring refills.
4.2 In the case of power loss, the counter must remain operational for a minimum of 72 hours. An external UPS must be included, if required, to meet this need.
4.3 The LN2 loss rate while the cryocooler is off must not exceed 3L/day.
4.4 The normal power consumption of the system must be 125 W typical, 350 W maximum
5. Other Requirements
5.1 Installation and training must be included.
5.2 Must include a minimum of one (1) year of warranty on parts and labor.
