GB/T 10264-2014Thermoluminescence dosimetry for personal and environmental monitoring (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

This standard replaces GB/T 10264-1988 "personal and environmental monitoring thermal dosimetry system", and GB/T 10264-1988 Compared to the main technical changes are as follows.

--- Standard text structural changes to prepare the format and technical content by IEC 61066:2006.

--- "1" and no longer distinguish between the energy range of environmental monitoring and personal monitoring for Hp (10) and H * (10), photon radiation energy the amount of range extension of 12keV ~ 7MeV, beta radiation of maximum energy range extended to 225keV ~ 3.54MeV, an increase of in Hp (0.07) photon radiation energy range 8keV ~ 250keV.

--- Added "2 normative references."

--- "3 Terms and Definitions" modify, supplement the terms and their definitions.

--- "4 units and symbols" to increase the dose equivalent units Greek [Waters] (Sv) and Table 1, "Symbols and abbreviations."

--- Product no longer follow the original method does not distinguish between environmental dosimeters and personal dosimeters performance requirements.

--- Technical requirements change.

- Type test reference conditions, radiation background is less than 0.1µSv/h, the reference radiation is S-Cs, N-80;

- standard test conditions for type testing, beta reference radiation source is a 90Sr/90Y; gamma radiation background <=0.25µSv/h;

- Evaluation of the performance of dosimetry system has been simplified and principled;

- increasing the dose measurement system software, and interface parameters of performance requirements.

This standard uses the translation method identical with IEC 61066:2006 "Personal and environmental monitoring thermoluminescence dosimetry system." the standard IEC 61066:2006 made the following editorial changes.

--- "2 Normative references" to the new standard replaces the old version of the standard (to IEC 60050-394:2007 instead of IEC 60050-394:1995) and has corresponding national standards with international standards to our standards;

--- The "2 Normative references" in ISO 4037-1, ISO 4037-2, ISO 4037-3 and ISO 4037-4 combined to ISO 4037 (All parts), the ISO 8529-1, ISO 8529-2 and ISO 8529-3 combined to ISO 8529 (all parts);

--- Remove the body does not appear in the IEC 60359:2001;

--- In the text in Tables 3 to 5 later, press the Chinese practice of using [0.71,1.67] instead of [0.71..1.67] represents the data interval;

--- In order to facilitate the following description in line with Chinese habits, 11.9.3 "Group 1 (the reference group). the nominal voltage and nominal frequency" was changed to "Group 1 (the reference group). Nominal voltage (Un), the nominal frequency (fn)";

--- Increased appendix NA "Normative references in this standard correspondence documents of international documents and files." this standard by the National Nuclear Instrument Standardization Technical Committee (SAC/TC30) and focal points.

This standard was drafted. Taishan Nuclear Power Joint Venture Co., Ltd. Nuclear Power Operation Management.

Introduction

Thermal dosimetry system (TLD) by the following components.

a) passive components (in the middle of this standard dosimeter). one or more radiation detectors and some methods of identification;

b) the reader. heating after exposure to ionizing radiation detectors and measuring the amount of light emitted by the heating used to determine the radiation dose;

c) the reader with a computer control software. memory readout data coming from paper to electronic documents or text computing, Evaluation of dose data display and storage;

d) auxiliary equipment and program files (manual). used for correlation processing, for example, the dose delete stored information, clean dose Meter or the whole system to ensure the necessary effectiveness.

Personal and environmental monitoring thermal dosimetry system

1 Scope

This standard applies to measuring the dose range within 0.01mSv ~ 10Sv photon irradiation or beta radiation outside the personal dose equivalent Hp (10) or Hp (0.07), or the ambient dose equivalent H * (10) thermal dosimetry (TLD) systems. For different practical amount and type of radiation Type, were provided for different energy range (see table below). Table of total energy value of the average energy are commonly used dosimetric quantity.

Practical photon radiation amount beta radiation Hp (10); H * (10) 12keV ~ 7MeV -Hp (0.07) 8keV ~ 250keV 0.07MeVa ~ 1.2MeV almost equal to the 225keV ~ 3.54MeV Maximum energy Emax range a beta radiation of energy greater than 0.07MeV particles can penetrate the depth of 0.07mm nominal dead layer of skin (the equivalent of 0.07mm depth of ICRU tissue equivalent).

Note 1. Unless otherwise indicated, the standard "dose" refers to the personal dose equivalent or ambient dose equivalent.

Note 2. For Hp (10) and H * (10), without regard to beta radiation, because it applies no conversion factor in ICRU56, ICRU57 and ISO 6980 in.

This standard applies to the desired energy unit (Sv) Evaluation read dose TLD (TLD) measurement system. Only other Dosimeter measurements of natural background radiation correction.

Note 3. The dose calculation may be performed before or after the amendment of the natural background radiation.

For a fixed range of influence quantity, this standard specifies the minimum requirements, such as the photon energy range 80keV ~ 1.25MeV (Table 3 ~ table 5). Dosimetry system should meet the requirements for the minimum range. But different manufacturers may affect the amount specified greater range, for example, such as, 60keV ~ 7MeV. These larger range called nominal range. In this case, the system should meet the dose measurement range for rated Wai requirements. Accordingly, the scope prescribed by a group meets the requirements of this standard (dose, energy, temperature, etc.) of the dosimetry system sort.

This standard specifies the thermal dosimetry system general characteristics, general test methods and performance requirements, as well as radiation characteristic ring Environmental, electrical, mechanical, software, and security features.

Since the system is concerned only with performance during the type test requirements of this standard does not check the thermal dosimetry system of absolute calibration. in Check the absolute calibration during routine testing.

This standard does not cover the requirements of the neutron dosimeter not involve the results of data processing.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 2900.81-2008 Electrotechnical terminology Nuclear Instruments Physical phenomena and basic concepts (IEC 60050-393:2003, IDT) GB/T 2900.82-2008 Electrotechnical terminology nuclear instrumentation equipment, systems, equipment and detectors (IEC 60050-394:2007, IDT) IEC 60050-311:2001 International Electrotechnical Vocabulary (IEV) electrical and electronic measuring and measuring instruments - Part 311. Measurement through the term (InternationalElectrotechnicalVocabulary (IEV) -Electricalandelectronicmeasurementsand measuringinstruments-Part 311. Generaltermsrelatingtomeasurements) IEC 60068-2-32 Environmental testing Part 2. Tests - Test Ed. Free fall (Environmentaltesting-