ASTM E910-18
(Test Method)Standard Test Method for Application and Analysis of Helium Accumulation Fluence Monitors for Reactor Vessel Surveillance
Standard Test Method for Application and Analysis of Helium Accumulation Fluence Monitors for Reactor Vessel Surveillance
SIGNIFICANCE AND USE
5.1 The HAFM test method is one of several available passive neutron dosimetry techniques (see, for example, Test Methods E854 and E1005). This test method can be used in combination with other dosimetry methods, or, if sufficient data are available from different HAFM sensor materials, as an alternative dosimetry test method. The HAFM method yields a direct measurement of total helium production in an irradiated sample. Absolute neutron fluence can then be inferred from this, assuming the appropriate spectrum integrated total helium production cross section. Alternatively, a calibration of the composite neutron detection efficiency for the HAFM method may be obtained by exposure in a benchmark neutron field where the fluence and spectrum averaged cross section are both known (see Guide E2005).
5.2 HAFMs have the advantage of producing an end product, helium, which is stable, making the HAFM method very attractive for both short-term and long-term fluence measurements without requiring time-dependent corrections for decay. HAFMs are therefore ideal passive, time-integrating fluence monitors. Additionally, the burnout of the daughter product, helium, is negligible.
5.2.1 Many of the HAFM materials can be irradiated in the form of unencapsulated wire segments (see 1.1.2). These segments can easily be fabricated by cutting from a standard inventoried material lot. The advantage is that encapsulation, with its associated costs, is not necessary. In several cases, unencapsulated wires such as Fe, Ni, Al/Co, and Cu, which are already included in the standard radiometric (RM) dosimetry sets (Table 1) can be used for both radiometric and helium accumulation dosimetry. After radiometric counting, the samples are later vaporized for helium measurement. (A) Evaluated 235U fission neutron spectrum averaged helium production cross section and energy range in which 90 % of the reactions occur. All values are obtained from ENDF/B-V Gas Production Dosimetry File data. Bracke...
SCOPE
1.1 This test method describes the concept and use of helium accumulation for neutron fluence dosimetry for reactor vessel surveillance. Although this test method is directed toward applications in vessel surveillance, the concepts and techniques are equally applicable to the general field of neutron dosimetry. The various applications of this test method for reactor vessel surveillance are as follows:
1.1.1 Helium accumulation fluence monitor (HAFM) capsules,
1.1.2 Unencapsulated, or cadmium or gadolinium covered, radiometric monitors (RM) and HAFM wires for helium analysis,
1.1.3 Charpy test block samples for helium accumulation, and
1.1.4 Reactor vessel (RV) wall samples for helium accumulation.
1.2 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E910 − 18
Standard Test Method for
Application and Analysis of Helium Accumulation Fluence
1
Monitors for Reactor Vessel Surveillance
This standard is issued under the fixed designation E910; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E170Terminology Relating to Radiation Measurements and
Dosimetry
1.1 This test method describes the concept and use of
E261Practice for Determining Neutron Fluence, Fluence
helium accumulation for neutron fluence dosimetry for reactor
Rate, and Spectra by Radioactivation Techniques
vessel surveillance. Although this test method is directed
E482Guide for Application of Neutron Transport Methods
toward applications in vessel surveillance, the concepts and
for Reactor Vessel Surveillance
techniquesareequallyapplicabletothegeneralfieldofneutron
E706MasterMatrixforLight-WaterReactorPressureVessel
dosimetry. The various applications of this test method for
Surveillance Standards
reactor vessel surveillance are as follows:
E844Guide for Sensor Set Design and Irradiation for
1.1.1 Helium accumulation fluence monitor (HAFM)
Reactor Surveillance
capsules,
E853PracticeforAnalysisandInterpretationofLight-Water
1.1.2 Unencapsulated, or cadmium or gadolinium covered,
Reactor Surveillance Results
radiometric monitors (RM) and HAFM wires for helium
E854Test Method for Application and Analysis of Solid
analysis,
State Track Recorder (SSTR) Monitors for Reactor Sur-
1.1.3 Charpy test block samples for helium accumulation,
veillance
and
E900Guide for Predicting Radiation-Induced Transition
1.1.4 Reactor vessel (RV) wall samples for helium accumu-
Temperature Shift in Reactor Vessel Materials
lation.
E944Guide for Application of Neutron Spectrum Adjust-
1.2 This standard does not purport to address all of the
ment Methods in Reactor Surveillance
safety concerns, if any, associated with its use. It is the
E1005Test Method for Application and Analysis of Radio-
responsibility of the user of this standard to establish appro-
metric Monitors for Reactor Vessel Surveillance
priate safety, health, and environmental practices and deter-
E1018Guide for Application of ASTM Evaluated Cross
mine the applicability of regulatory limitations prior to use.
Section Data File
1.3 This international standard was developed in accor-
E2005Guide for Benchmark Testing of Reactor Dosimetry
dance with internationally recognized principles on standard-
in Standard and Reference Neutron Fields
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3. Terminology
mendations issued by the World Trade Organization Technical
3.1 Definitions—For definition of terms used in this test
Barriers to Trade (TBT) Committee.
method, refer to Terminologies C859 and E170. For terms not
defined therein, reference may be made to other published
2. Referenced Documents
3
glossaries.
2
2.1 ASTM Standards:
C859Terminology Relating to Nuclear Materials
4. Summary of the HAFM Test Method
4.1 Helium accumulation fluence monitors (HAFMs) are
passive neutron dosimeters that have a measured reaction
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE10onNuclear
product that is helium. The monitors are placed in the reactor
Technology and Applicationsand is the direct responsibility of Subcommittee
locations of interest, and the helium generated through (n,α)
E10.05 on Nuclear Radiation Metrology.
Current edition approved Feb. 1, 2018. Published March 2018. Originally
reactions accumulates and is retained in the HAFM (or HAFM
approved in 1982. Last previous edition approved in 2013 as E910–07 (2013).
capsule) until the time of removal, perhaps many years later.
DOI: 10.1520/E0910-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on See Dictionary of Scientific Terms, 3rd Edition, Sybil P. Parker, Ed., McGraw
theASTM website. Hill, Inc.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E910 − 18
Theheliumisthenmeasuredverypreciselybyhigh-sensitivity cussed more fully in Section 13. Generally, they total less than
4
gas mass spectrometry (1, 2). The neutron fluence is then 5%ofthemeasuredheliumconcentration.S
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E910 − 07 (Reapproved 2013) E910 − 18
Standard Test Method for
Application and Analysis of Helium Accumulation Fluence
Monitors for Reactor Vessel Surveillance, E706
1
(IIIC)Surveillance
This standard is issued under the fixed designation E910; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method describes the concept and use of helium accumulation for neutron fluence dosimetry for reactor vessel
surveillance. Although this test method is directed toward applications in vessel surveillance, the concepts and techniques are
equally applicable to the general field of neutron dosimetry. The various applications of this test method for reactor vessel
surveillance are as follows:
1.1.1 Helium accumulation fluence monitor (HAFM) capsules,
1.1.2 Unencapsulated, or cadmium or gadolinium covered, radiometric monitors (RM) and HAFM wires for helium analysis,
1.1.3 Charpy test block samples for helium accumulation, and
1.1.4 Reactor vessel (RV) wall samples for helium accumulation.
1.2 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C859 Terminology Relating to Nuclear Materials
E170 Terminology Relating to Radiation Measurements and Dosimetry
3
E244 Test Method for Atom Percent Fission in Uranium and Plutonium Fuel (Mass Spectrometric Method) (Withdrawn 2001)
E261 Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
E482 Guide for Application of Neutron Transport Methods for Reactor Vessel Surveillance
E706 Master Matrix for Light-Water Reactor Pressure Vessel Surveillance Standards
E844 Guide for Sensor Set Design and Irradiation for Reactor Surveillance
E853 Practice for Analysis and Interpretation of Light-Water Reactor Surveillance Results
E854 Test Method for Application and Analysis of Solid State Track Recorder (SSTR) Monitors for Reactor Surveillance
E900 Guide for Predicting Radiation-Induced Transition Temperature Shift in Reactor Vessel Materials
E944 Guide for Application of Neutron Spectrum Adjustment Methods in Reactor Surveillance
E1005 Test Method for Application and Analysis of Radiometric Monitors for Reactor Vessel Surveillance
E1018 Guide for Application of ASTM Evaluated Cross Section Data File
E2005 Guide for Benchmark Testing of Reactor Dosimetry in Standard and Reference Neutron Fields
1
This test method is under the jurisdiction of ASTM Committee E10 on Nuclear Technology and Applicationsand is the direct responsibility of Subcommittee E10.05 on
Nuclear Radiation Metrology.
Current edition approved Jan. 1, 2013Feb. 1, 2018. Published January 2013March 2018. Originally approved in 1982. Last previous edition approved in 20072013 as
E910 – 07.E910 – 07 (2013). DOI: 10.1520/E0910-07R13.10.1520/E0910-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website. The roman numeral-alphabetical designation at the end of some of the titles
indicates that a brief description of this standard may be found in Matrix E706.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E910 − 18
3. Terminology
3.1 Definitions—For definition of terms used in this test method, refer to TerminologyTerminologies C859 and E170. For terms
3
not defined therein, reference may be made to other published glossaries.
4. Summary of the HAFM Test Method
4.1 Helium accumulation fluence monitors (HAFMs) are passive neutron dosimeters that have a me
...
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