ASTM-E2232 2010

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E2232-10 Standard Guide for Selection and Use of Mathematical Methods for Calculating Absorbed Dose in Radiation Processing Applications

Published By	Publication Date	Number of Pages
ASTM	2010	19

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Description

1.1 This guide describes different mathematical methods that may be used to calculate absorbed dose and criteria for their selection. Absorbed-dose calculations can determine the effectiveness of the radiation process, estimate the absorbed-dose distribution in product, or supplement or complement, or both, the measurement of absorbed dose.

1.2 Radiation processing is an evolving field and annotated examples are provided in Annex A6 to illustrate the applications where mathematical methods have been successfully applied. While not limited by the applications cited in these examples, applications specific to neutron transport, radiation therapy and shielding design are not addressed in this document.

1.3 This guide covers the calculation of radiation transport of electrons and photons with energies up to 25 MeV.

1.4 The mathematical methods described include Monte Carlo, point kernel, discrete ordinate, semi-empirical and empirical methods.

1.5 General purpose software packages are available for the calculation of the transport of charged and/or uncharged particles and photons from various types of sources of ionizing radiation. This standard is limited to the use of these software packages or other mathematical methods for the determination of spatial dose distributions for photons emitted following the decay of ¹³⁷ Cs or ⁶⁰ Co, for energetic electrons from particle accelerators, or for X-rays generated by electron accelerators.

1.6 This guide assists the user in determining if mathematical methods are a useful tool. This guide may assist the user in selecting an appropriate method for calculating absorbed dose. The user must determine whether any of these mathematical methods are appropriate for the solution to their specific application and what, if any, software to apply.

Note 1The user is urged to apply these predictive techniques while being aware of the need for experience and also the inherent limitations of both the method and the available software. Information pertaining to availability and updates to codes for modeling radiation transport, courses, workshops and meetings can be found in Annex A1. For a basic understanding of radiation physics and a brief overview of method selection, refer to Annex A3.

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
3	Significance and Use
4	Classification of Mathematical Methods and General Application
6	Prerequisites for Application of a Mathematical Method Specification of Modeling Strategy and Method Selection FIG. 1
7	FIG. 2
8	Verification and Validation of Model Performance Uncertainty in Model/Method Prediction
9	Documentation Keywords
10	A1. RADIATION MODELING CODES: SOURCES AND RELATED INFORMATION A1.1 A1.2 A1.3 A1.4 A1.5 A1.6 A1.7 A1.8 A1.9 A1.10 A1.11 A1.12 A2. REFERENCES FOR SOFTWARE VALIDATION A2.1 A2.2 A2.3 A2.4 A2.5 A2.6 A2.7 A2.8
11	A3. PHYSICS AND MODELING TUTORIAL A3.1 Justification for Model Building A3.2 Consideration of the Modeling Effort A3.3 Brief Physics Tutorial A3.4 Method Selection
12	A4. PARTICULARS OF THREE-DIMENSIONAL MODEL CONSTRUCTION A4.1 General A4.2 Photon Source Model Construction A4.3 Electron Source Model Construction TABLE A3.1
13	A4.4 Product Movement (Conversion of Model Output into Dose) A4.5 Model of a Facility Using Homogeneous Product A4.6 Model of a Facility Using Specific Products A4.7 Model of Dosimeters A4.8 Dose Calculation
14	A5. BENCHMARKING A5.1 Code-to-code Comparison A5.2 Code-to-Dosimetry Comparison A6. EXAMPLES OF DIFFERENT CODES A6.1 Examples for Monte Carlo Models A6.2 Examples of Deterministic Models
15	A6.3 Examples of Empirical and Semi-empirical Models A6.4 Additional Annotated Examples REFERENCES

Additional information

Standard Title	E2232-10 Standard Guide for Selection and Use of Mathematical Methods for Calculating Absorbed Dose in Radiation Processing Applications
Published Code	ASTM
Publication Date	2010
Pages Count	19

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