ASTM E900-21
(Guide)Standard Guide for Predicting Radiation-Induced Transition Temperature Shift in Reactor Vessel Materials
Standard Guide for Predicting Radiation-Induced Transition Temperature Shift in Reactor Vessel Materials
SIGNIFICANCE AND USE
4.1 Operation of commercial power reactors must conform to pressure-temperature limits during heatup and cooldown to prevent over-pressurization at temperatures that might cause non-ductile behavior in the presence of a flaw. Radiation damage to the reactor vessel is compensated for by adjusting the pressure-temperature limits to higher temperatures as the neutron damage accumulates. The present practice is to base that adjustment on the TTS produced by neutron irradiation as measured at the Charpy V-notch 41-J (30-ft·lbf) energy level. To establish pressure temperature operating limits during the operating life of the plant, a prediction of TTS must be made.
4.1.1 In the absence of surveillance data for a given reactor material (see Practice E185 and E2215), the use of calculative procedures are necessary to make the prediction. Even when credible surveillance data are available, it will usually be necessary to interpolate or extrapolate the data to obtain a TTS for a specific time in the plant operating life. The embrittlement correlation presented herein has been developed for those purposes.
4.2 Research has established that certain elements, notably copper (Cu), nickel (Ni), phosphorus (P), and manganese (Mn), cause a variation in radiation sensitivity of reactor pressure vessel steels. The importance of other elements, such as silicon (Si), and carbon (C), remains a subject of additional research. Copper, nickel, phosphorus, and manganese are the key chemistry parameters used in developing the calculative procedures described here.
4.3 Only power reactor (PWR and BWR) surveillance data were used in the derivation of these procedures. The measure of fast neutron fluence used in the procedure is n/m2 (E > 1 MeV). Differences in fluence rate and neutron energy spectra experienced in power reactors and test reactors have not been accounted for in these procedures.
SCOPE
1.1 This guide presents a method for predicting values of reference transition temperature shift (TTS) for irradiated pressure vessel materials. The method is based on the TTS exhibited by Charpy V-notch data at 41-J (30-ft·lbf) obtained from surveillance programs conducted in several countries for commercial pressurized (PWR) and boiling (BWR) light-water cooled (LWR) power reactors. An embrittlement correlation has been developed from a statistical analysis of the large surveillance database consisting of radiation-induced TTS and related information compiled and analyzed by Subcommittee E10.02. The details of the database and analysis are described in a separate report (ADJE090015-EA).2,3 This embrittlement correlation was developed using the variables copper, nickel, phosphorus, manganese, irradiation temperature, neutron fluence, and product form. Data ranges and conditions for these variables are listed in 1.1.1. Section 1.1.2 lists the materials included in the database and the domains of exposure variables that may influence TTS but are not used in the embrittlement correlation.
1.1.1 The range of material and irradiation conditions in the database for variables used in the embrittlement correlation:
1.1.1.1 Copper content up to 0.4 %.
1.1.1.2 Nickel content up to 1.7 %.
1.1.1.3 Phosphorus content up to 0.03 %.
1.1.1.4 Manganese content within the range from 0.55 to 2.0 %.
1.1.1.5 Irradiation temperature within the range from 255 to 300°C (491 to 572°F).
1.1.1.6 Neutron fluence within the range from 1 × 1021 n/m2 to 2 × 1024 n/m2 (E> 1 MeV).
1.1.1.7 A categorical variable describing the product form (that is, weld, plate, forging).
1.1.2 The range of material and irradiation conditions in the database for variables not included in the embrittlement correlation:
1.1.2.1 A533 Type B Class 1 and 2, A302 Grade B, A302 Grade B (modified), and A508 Class 2 and 3. Also, European and Japanese steel grades that are equivalent to these ASTM Grades.
1.1.2.2 Submerged arc welds, shielded a...
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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: E900 − 21
Standard Guide for
Predicting Radiation-Induced Transition Temperature Shift
1
in Reactor Vessel Materials
This standard is issued under the fixed designation E900; 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 1.1.1.2 Nickel content up to 1.7 %.
1.1.1.3 Phosphorus content up to 0.03 %.
1.1 This guide presents a method for predicting values of
1.1.1.4 Manganesecontentwithintherangefrom0.55to2.0
reference transition temperature shift (TTS) for irradiated
%.
pressure vessel materials. The method is based on the TTS
1.1.1.5 Irradiationtemperaturewithintherangefrom255to
exhibited by Charpy V-notch data at 41-J (30-ft·lbf) obtained
300°C (491 to 572°F).
from surveillance programs conducted in several countries for
21 2
1.1.1.6 Neutronfluencewithintherangefrom1×10 n/m
commercialpressurized(PWR)andboiling(BWR)light-water
24 2
to2×10 n/m (E> 1 MeV).
cooled (LWR) power reactors. An embrittlement correlation
1.1.1.7 A categorical variable describing the product form
has been developed from a statistical analysis of the large
(that is, weld, plate, forging).
surveillance database consisting of radiation-induced TTS and
1.1.2 The range of material and irradiation conditions in
related information compiled and analyzed by Subcommittee
the database for variables not included in the embrittlement
E10.02. The details of the database and analysis are described
2,3
correlation:
in a separate report (ADJE090015-EA). This embrittlement
correlation was developed using the variables copper, nickel, 1.1.2.1 A533 Type B Class 1 and 2, A302 Grade B, A302
Grade B (modified), and A508 Class 2 and 3. Also, European
phosphorus, manganese, irradiation temperature, neutron
fluence,andproductform.Datarangesandconditionsforthese and Japanese steel grades that are equivalent to these ASTM
Grades.
variables are listed in 1.1.1. Section 1.1.2 lists the materials
includedinthedatabaseandthedomainsofexposurevariables 1.1.2.2 Submerged arc welds, shielded arc welds, and elec-
that may influence TTS but are not used in the embrittlement troslag welds having compositions consistent with those of the
correlation. welds used to join the base materials described in 1.1.2.1.
12
1.1.1 The range of material and irradiation conditions in
1.1.2.3 Neutron fluence rate within the range from3×10
2 16 2
the database for variables used in the embrittlement correla-
n/m/sto5×10 n/m /s (E > 1 MeV).
tion:
1.1.2.4 Neutron energy spectra within the range expected at
1.1.1.1 Copper content up to 0.4 %.
the reactor vessel region adjacent to the core of commercial
PWRs and BWRs (greater than approximately 500MW elec-
tric).
1
This guide is under the jurisdiction of ASTM Committee E10 on Nuclear
1.1.2.5 Irradiation exposure times of up to 25 years in
Technology and Applications and is the direct responsibility of Subcommittee
boiling water reactors and 31 years in pressurized water
E10.02 on Behavior and Use of Nuclear Structural Materials.
reactors.
Current edition approved Sept. 1, 2021. Published October 2021. Originally
ɛ2
approved in 1983. Last previous edition approved in 2015 as E900–15 . DOI:
1.2 It is the responsibility of the user to show that the
10.1520/E0900-21.
2
Available from ASTM International Headquarters. Order Adjunct No. conditions of interest in their application of this guide are
ADJE090015-EA.
addressed adequately by the technical information on which
3
To inform the TTS prediction of Section 5 of this guide, the E10.02
the guide is based. It should be noted that the conditions
Subcommittee decided to limit the data considered to Charpy shift values (∆T )
41J
quantified by the database are not distributed evenly over the
measured from irradiations conducted in PWRs and BWRs. A database of 1,878
Charpy TTSmeasurementswascompiledfromsurveillancereportsonoperatingand
range of materials and irradiation conditions described in 1.1,
decommissioned light water reactors of Western design from 13 countries (Brazil,
and that some combination of variables, particularly at the
Belgium, France, Germany, Italy, Japan, Mexico, The Netherlands, South Korea,
extremes of the data range are under-represented. Particular
Sweden, Switzlerland, Taiwan, and the United States), and from the technical
attention is warranted when the guide is applied to conditions
literature. For each data record, the following information had to be available:
fluence, fluence rate, irradiation tempera
...
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.
´2
Designation: E900 − 15 E900 − 21
Standard Guide for
Predicting Radiation-Induced Transition Temperature Shift
1
in Reactor Vessel Materials
This standard is issued under the fixed designation E900; 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
ε NOTE—Old Ref 1 was editorially removed and the adjunct information was updated and added to Section 2, Refer-
enced Documents, in April 2017.
2
ε NOTE—In 3.1.2 and 3.1.3, “neutrons per square centimeter” was corrected editorially to “neutrons per square meter” to
reflect the usage in Section 5 in July 2020.
1. Scope
1.1 This guide presents a method for predicting values of reference transition temperature shift (TTS) for irradiated pressure vessel
materials. The method is based on the TTS exhibited by Charpy V-notch data at 41-J (30-ft·lbf) obtained from surveillance
programs conducted in several countries for commercial pressurized (PWR) and boiling (BWR) light-water cooled (LWR) power
reactors. An embrittlement correlation has been developed from a statistical analysis of the large surveillance database consisting
of radiation-induced TTS and related information compiled and analyzed by Subcommittee E10.02. The details of the database and
2,3
analysis are described in a separate report (ADJE090015-EA). This embrittlement correlation was developed using the variables
copper, nickel, phosphorus, manganese, irradiation temperature, neutron fluence, and product form. Data ranges and conditions for
these variables are listed in 1.1.1. Section 1.1.2 lists the materials included in the database and the domains of exposure variables
that may influence TTS but are not used in the embrittlement correlation.
1.1.1 The range of material and irradiation conditions in the database for variables used in the embrittlement correlation:
1.1.1.1 Copper content up to 0.4 %.
1.1.1.2 Nickel content up to 1.7 %.
1.1.1.3 Phosphorus content up to 0.03 %.
1.1.1.4 Manganese content within the range from 0.55 to 2.0 %.
1.1.1.5 Irradiation temperature within the range from 255 to 300°C (491 to 572°F).
21 2 24 2
1.1.1.6 Neutron fluence within the range from 1 × 10 n/m to 2 × 10 n/m (E> 1 MeV).
1
This guide is under the jurisdiction of ASTM Committee E10 on Nuclear Technology and Applications and is the direct responsibility of Subcommittee E10.02 on
Behavior and Use of Nuclear Structural Materials.
Current edition approved Feb. 1, 2015Sept. 1, 2021. Published April 2015October 2021. Originally approved in 1983. Last previous edition approved in 20072015 as
ɛ2
E900 – 02E900 – 15 (2007). DOI: 10.1520/E0900-15E02.10.1520/E0900-21.
2
Available from ASTM International Headquarters. Order Adjunct No. ADJE090015-EA.
3
To inform the TTS prediction of Section 5 of this guide, the E10.02 Subcommittee decided to limit the data considered to Charpy shift values (ΔT ) measured from
41J
irradiations conducted in PWRs and BWRs. A database of 1,878 Charpy TTS measurements was compiled from surveillance reports on operating and decommissioned light
water reactors of Western design from 13 countries (Brazil, Belgium, France, Germany, Italy, Japan, Mexico, The Netherlands, South Korea, Sweden, Switzlerland, Taiwan,
and the United States), and from the technical literature. For each data record, the following information had to be available: fluence, fluence rate, irradiation temperature,
and % content of Cu, Ni, P, and Mn. Reports and technical papers documenting the results of research programs conducted in material test reactors were also reviewed. Data
from these sources was included in the database for information, but was not used in the development of the TTS prediction of Section 5 of this guide.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E900 − 21
1.1.1.7 A categorical variable describing the product form (that is, weld, plate, forging).
1.1.2 The range of material and irradiation conditions in the database for variables not included in the embrittlement correlation:
1.1.2.1 A533 Type B Class 1 and 2, A302 Grade B, A302 Grade B (modified), and A508 Class 2 and 3. Also, European and
Japanese steel grades that are equivalent to these ASTM Grades.
1.1.2.2 Submerged arc welds, shielded arc weld
...
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