Deliverables:
The high-resolution gamma spectrometer and LN2 recycler system (later to be known as the system) 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 system must include all hardware, 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 system 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 system must include a low background detector accompanied by oxygen-free high conductivity (OFHC) copper endcaps with low-background, and high purity aluminum well tubes. Low background means minimal contribution to the background from the detector materials. Average background count of 3.3 counts/1000 sec/KeV at 100 KeV for IEEE efficiency of 100 %.
2.3 The system must include advanced efficiency calibration software to reduce data processing time; include spectral analysis software with test results such as V&V (Verification and Validation) to produce certificates of validation;
2.4 System detector shielding is to be graded lead, with a 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 system software must provide accurate identification and quantification of radioactive material through accurate system calibration and sample 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 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 PC, including all necessary peripherals (mouse, keyboard, monitor, etc) and Windows 11. The PC must be capable of running the system software and hardware.
2.8 The system 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 LN2 recycling system must include a 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 system must achieve an energy range of 40 keV-10MeV, or better.
3.2 The proposed system must be capable of achieving the following energy resolutions:
At Full Width Half Maximum: 1.2 keV @ 122 keV or better.
At Full Width Half Maximum (FWHM): 2.3 keV @1333 keV or better.
3.3 Peak-to-Compton Ratio must be a minimum of 62:1.
4. LN2 Recycler System
4.1 The system must be capable of maintaining 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 to meet this requirement.
4.3 The LN2 loss rate while the cryocooler is off must not exceed 3L/day.
4.4 The power consumption of the LN2 Recycler must be 350 W maximum
5. Other Requirements
5.1 Installation and a training session for 2 users must be included.
5.2 Must include a minimum of one (1) year of warranty on parts and labor.
