Junray ZR-3916 Airborne Tritium Sampler

Overview

The Junray ZR-3916 Airborne Tritium Sampler is a field-deployable, active-volume sampling instrument engineered for the quantitative collection of airborne tritium species—including tritiated water vapor (HTO) and gaseous tritium compounds such as tritiated hydrogen (HT) and tritiated methane (CH₃T)—in environmental and occupational monitoring contexts. It operates on the principle of controlled bubbling through aqueous or chemical absorbents, enabling efficient mass transfer of volatile tritium species into collection media for subsequent laboratory analysis via liquid scintillation counting (LSC) or ionization chamber measurement. Designed specifically for continuous or intermittent surveillance around nuclear power plants, research reactors, fuel fabrication facilities, and decommissioning sites, the ZR-3916 complies with internationally recognized sampling protocols for airborne radionuclides and supports regulatory compliance with national and international radiation protection frameworks.

Key Features

• Integrated rechargeable lithium-ion battery system enabling full operational autonomy—powering startup, real-time data visualization, onboard diagnostics, data export, and thermal printing without external AC supply.
• Robust mechanical tilt-sensing circuitry that triggers immediate shutdown upon device inclination beyond ±15°, preventing sample contamination and ensuring operator safety during transport or unstable deployment.
• Compressor-based refrigeration module with user-adjustable setpoint range (5–8 °C), maintaining optimal condensation efficiency for HTO capture while minimizing evaporative loss from absorption bottles.
• Embedded RFID/NFC electronic tag supporting asset lifecycle management; enables rapid inventory scanning, calibration tracking, and audit-ready equipment registration in centralized LIMS or CMMS platforms.
• Onboard flow calibration routine compliant with ISO 2889:2010 Annex B—automatically verifies and corrects volumetric flow rate against NIST-traceable reference standards at user-defined intervals.
• High-resolution 7-inch capacitive color touchscreen with intuitive Chinese-language UI, supporting multi-touch gesture navigation, contextual help overlays, and embedded electronic manual access.
• Real-time graphical display of instantaneous volumetric flow (L/min), cumulative sampled volume (L), and ambient temperature/humidity—data logged at 1-second resolution and exportable as CSV via USB or Bluetooth.
• Programmable sampling modes: time-based (e.g., 24-hr cycles), volume-triggered (e.g., 1000 L per bottle), or interval-driven (e.g., 30-min on / 30-min off) to align with IAEA Technical Reports Series No. 438 and US NRC Regulatory Guide 4.15 requirements.

Sample Compatibility & Compliance

The ZR-3916 accommodates four standardized wide-mouth absorption bottles (≥250 mL each), compatible with common trapping solutions including deionized water (for HTO), palladium-on-carbon catalyst beds (for HT oxidation), or alkaline permanganate scrubbers (for organic tritium compounds). Its sampling architecture adheres to the physical and chemical constraints defined in HJ 61–2021 (China’s Radiation Environmental Monitoring Technical Specification), HJ 22–1998 (General Requirements for Airborne Radioactive Sampling), ISO 2889:2010 (Sampling and Monitoring of Radioactive Effluents from Nuclear Installations), and IEC 62303:2008 (Radiation Protection Instruments – Airborne Tritium Monitors). All firmware logic, data logging timestamps, and calibration events are timestamped and stored with write-once integrity to support GLP/GMP audit trails.

Software & Data Management

Data acquisition and configuration are managed via the proprietary Junray TRIT-OS firmware, which enforces secure, non-volatile storage of all operational parameters—including flow setpoints, refrigeration profiles, alarm thresholds, and sampling schedules. The device logs metadata in ISO 8601-compliant format and supports encrypted USB mass-storage export for offline LIMS integration. Bluetooth 5.0 connectivity enables wireless pairing with certified thermal printers (e.g., Zebra ZQ520) and mobile diagnostic apps. Optional cloud gateway modules provide TLS 1.2–secured telemetry transmission for remote fleet monitoring, with configurable alert escalation via SMS/email upon threshold breach or fault condition.

Applications

• Perimeter environmental monitoring at nuclear generating stations and reprocessing facilities.
• Occupational exposure assessment in tritium-handling laboratories and fusion research centers (e.g., ITER partner institutions).
• Baseline characterization and post-incident response sampling following suspected tritium release events.
• Validation of ventilation system performance and filtration efficiency in hot cells and gloveboxes.
• Supporting dose reconstruction studies under ICRP Publication 137 and IAEA Safety Standards Series No. GSG-8.

FAQ

Does the ZR-3916 meet FDA 21 CFR Part 11 requirements for electronic records?

No—this instrument is not intended for pharmaceutical or clinical use; it is designed exclusively for environmental radiation monitoring and does not implement Part 11–compliant audit trails or electronic signatures.
Can the refrigeration temperature be adjusted outside the 5–8 °C range?

No—the compressor cooling system is hardware-limited to this validated operating band to ensure consistent HTO condensation efficiency and prevent ice formation or thermal shock to absorption media.
Is the flow calibration traceable to national metrology institutes?

Yes—calibration routines reference internal primary flow sensors calibrated against NIM (National Institute of Metrology, China)–certified rotameters and laminar flow elements, with certificates available upon request.
What happens if power fails mid-sampling?

The device retains all runtime parameters, cumulative volume, and timestamped logs in non-volatile memory; upon power restoration, it prompts the operator to resume or abort the current sampling sequence.
Are replacement absorption bottles supplied by Junray?

Yes—standardized borosilicate glass wide-mouth bottles (250 mL, DIN 16001 thread) with PTFE-lined caps are available as OEM consumables (Part No. ZR-BOT-250W).