GB16334-1996
Practical guide of dosimetry in a gamma irradiation facility for food processing
γ辐照装置食品加工实用剂量学导则
GB 16334-1996 is a current mandatory Chinese national standard for Practical guide of dosimetry in a gamma irradiation facility for food processing. It appears in the Food compliance cluster with a product safety focus and has an implementation date of Sep 1, 1997.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard is applicable to the commissioning and routine operation of gamma irradiation facilities specifically used for food processing. It covers an absorbed dose range of 0.02 kGy to 60 kGy and is also recommended as a reference for the irradiation of other non-food products. It is mandatory for facilities utilizing gamma radiation sources to process food products.
Technical requirements
The standard specifies the procedures and content for dose measurement during the commissioning and daily operation of gamma irradiation facilities. It requires facilities to establish a dosimetry system that is regularly calibrated and maintains traceability to national standards. Facilities must conduct comprehensive dose distribution measurements to determine the maximum and minimum dose locations, ensuring the dose uniformity meets technological requirements. It outlines the requirements for the classification, selection, and calibration of dosimeters, categorized into reference, standard, and routine dosimeters. The standard emphasizes that the absorbed dose must not be less than the required minimum dose nor exceed the legal maximum dose limit. Facilities must implement strict quality assurance protocols and maintain detailed records of all processing parameters. Additionally, the standard defines the operational configurations for irradiation facilities, including static batch, dynamic continuous, dynamic step, and product flow methods. It requires the use of visual indicator labels on product boxes to distinguish between irradiated and non-irradiated items.
Testing methods
The standard involves several key measurement and testing procedures, including three-dimensional dose mapping using a grid of dosimeters placed throughout the product or simulated product boxes. It also requires the calibration of routine dosimeters using the substitution method at a designated calibration point within a water or solid phantom. Uncertainty analysis must be conducted to evaluate both Type A and Type B components of the measurement results.
FAQs
What is the applicable absorbed dose range for GB 16334-1996?
It applies to gamma irradiation facilities processing food, covering an absorbed dose range of 0.02 kGy to 60 kGy. It is also recommended as a reference for the irradiation of other non-food products.
How does GB 16334-1996 classify dosimetry systems?
It classifies dosimeters into three categories: reference dosimeters, standard dosimeters, and routine dosimeters, based on their metrological performance and intended use in traceability and daily monitoring.
What are the key operational requirements for an irradiation facility under this standard?
It mandates that facilities establish traceability to national standards, conduct commissioning dose mapping, perform daily dose monitoring, and maintain comprehensive records of all processing parameters and uncertainties.
The summary above provides a high-level overview of GB 16334-1996. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 16334-1996 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Health and hygiene
- CCS
- C53
- ICS
- 67.040
- Competent department
- National Health Commission
- Technical committee
- National Health Commission