Activation Energy Use and Verification Post EPRI Report ......EPRI Report NP-1558, App. B, Section...

Activation Energy Use and

Verification Post

EPRI Report 3002018283

(NP-1558 Rev. 1) Issuance

IEPSON Consulting Enterprises, Inc.

Dick Butwin

Vice President – Projects

November 2020

November 2020 IEPSON Presentation 2

Agenda

◼ EPRI Report 3002018283 Issuance

◼ Activation Energy Changes

◼ New Topics

◼ Identification and Evaluation of Existing

NP-1558 Activation Energy Use

◼ Recommended Activation Energy

Resources Going Forward


EPRI Report 3002018283 Issuance

◼ Issued in July 2020

◼ Revision 1 to EPRI Report NP-1558 from September

1980

◼ Per the EPRI website (EPRI.com), EPRI Report

3002018283 supersedes EPRI Report NP-1558

◼ EPRI Report 3002018283 is available at no cost to

funding members online or non-funding entities can

contact the EPRI Order Center


EPRI Report 3002018283 Major Changes: Activation Energies

◼ Significant details added to Appendix B text

◼ Revised App. B Table B-1 of Activation Energy

Values now identifies:

◼ If the Source Reference is Available

◼ If the Arrhenius Linear Regression was confirmed

◼ If the value was cited in the main body text

◼ New App. B Table B-1A identifies Activation Energy

Values with Unavailable Source References, with

common material activation energy comparisons

◼ New App. B Table B-2 provides Activation Energy

Values in Assorted EPRI Reports


EPRI Report 3002018283 Major Changes: New Aging Topics

◼ New Appendix E of 20+ aging-related topical areas

after 1980 (Issuance of NP-1558)

◼ Each topic grouping contains:

◼ A definition from a resource

◼ Main body citations (if applicable)

◼ Various industry reports related to the topic, with sections

and/or page numbers cited related to the topic

◼ Various examples of topic area use (if applicable), such as

calculation, figure, in-plant use, etc.

◼ Appendix E is simply a tool for end user to locate

related source documents on topical areas.


EPRI NP-1558 Current Qualification Use Need

◼ Due to the large number of changes to the activation

energy basis originally supplied in EPRI NP-1558,

Report 3002018283, Executive Summary, How to

Apply Results, identifies how it is important for end-

users to search if there are any current uses based

on activation energy values for which EPRI no longer

has publicly available references or were unable to

confirm Arrhenius linear regression calculations.

◼ End users may use any internal tracking mechanisms

deemed necessary to address these changes.


EPRI NP-1558 Current Qualification Use Ownership

◼ EPRI Report NP-1558 activation energy values may

have been cited by any of the following:

◼ Utilities

◼ Vendors

◼ Manufacturers

◼ Test Laboratories

◼ Consultants

◼ Regulators

◼ Industry Groups


EPRI NP-1558 Current Qualification Use Ownership, NRC Background

◼ NRC Inspection Manual IP 71111 Attachment 21N

(https://www.nrc.gov/docs/ML1903/ML19036A556.pd

f), effective February 5, 2019, Att2-5, states:

“Beyond ensuring that vendor programs satisfy the 10

CFR Part 50, Appendix B, requirements and confirming

that EQ equipment is received as procured, licensees

are not required to validate information (e.g., activation

energy) contained in the EQ reports provided by

Appendix B vendors.”


EPRI NP-1558 Current Qualification Use

◼ Primary (Many) EQ Program Uses:

◼ EQ Files

◼ EQ Test Reports

◼ EQ Test Plans

◼ Qualified Life Calculations


EPRI NP-1558 Current Qualification Use Ownership, Continued

◼ Secondary (i.e., Not as Many) EQ Program Uses:

◼ EQ Program Manuals

◼ EQ Design Basis Documents

◼ Temperature Monitoring Evaluations

◼ Condition Reports

◼ Other Non-Electrical EQ Program use (i.e., Mechanical EQ,

License Renewal Aging Management Guidelines and

Programs, Other)


EPRI NP-1558 Activation Energy Research Steps

1. Determine where EPRI Report NP-1558 is used in

qualification documentation

2. Determine if the activation energy source document

is available

3. Determine if there is an Adequate Basis for Ea:

o Arrhenius Linear Regression calculation

acceptable if applicable

o Adequate technical rigor or conservatism

o Applicable to component function

o Adequate basis considering material used to

determine Ea and material used in the component


EPRI NP-1558 Current Qualification Use Searches

◼ Use search tools of plant / utility networks of various

databases such as for Condition Reports, Operating

Experience, etc.

◼ Perform electronic file folder searches of EQ Program

documents

◼ Identify the complete list of plant documents that refer

to EPRI Report NP-1558

◼ Determine which of the above relate to activation

energy (Note: Some plant program documents have

referred to NP-1558 radiation thresholds)


EPRI NP-1558 Current Qualification Use Source Availability

◼ Determine if source basis was located per EPRI in

Report 3002018283, Table B-1.

◼ If yes, the EPRI Project Manager could be contacted to lead

end-user to source document owner. End users could also

attempt to retrieve document directly from owner, public

searches, or private databases as available (i.e., EQDB).

◼ If no, and if the end user does not already have a copy of the

source basis, another activation energy with a source basis

would be needed.


EPRI NP-1558 Current Qualification Use Arrhenius Linear Regression Confirmation

◼ Determine if the Arrhenius Linear Regression

calculation basis was confirmed per EPRI in Report

3002018283, Table B-1 (Arrhenius Linear Regression

calculations were originally performed in EPRI NP-

1558 to determine activation energies).

◼ If yes, the EPRI Project Manager could be contacted to view

calculation. Alternatively, end users could perform internal

calculations to also verify the original result.

◼ If no, another activation energy with a source basis would be

needed.


EPRI NP-1558 Current Qualification Use Material Property Applicability

◼ EPRI Report NP-1558, App. B, Section B.1, ended

that “it is essential…to verify the relevance to the

user’s application.” This has been highlighted in bold

and underline in EPRI Report 3002018283 for its

significance.

◼ EPRI Report 3002018283, Section B.1.C provides

information on Activation Energy Selection, including

verification that activation energies are based on

material properties deemed applicable / appropriate

for the credited function of the material or item.


EPRI NP-1558 Current Qualification Use Material Property Applicability, Continued

◼ Accordingly, the applicability of activation energy

values used from EPRI NP-1558 should have already

been considered for the credited function / material.

◼ If yes, then no further action is needed on this step.

◼ If no, then this basis should be addressed.


EPRI NP-1558 Current Qualification Use Activation Energy Range Applicability

◼ EPRI Report NP-1558, App. B, Section B.1,

contained various qualifiers that are now highlighted

in bold and underline in EPRI Report 3002018283 for

their significance, including that the listed activation

energies:

◼ Are not an exhaustive tabulation

◼ Were a convenient recording

◼ Were obtained incidentally


EPRI NP-1558 Current Qualification Use Activation Energy Range Applicability, Continued

◼ Therefore, for any use of an activation energy value

from EPRI Report NP-1558, determine if there is a

direct link between the manufacturer / material from

the report to the end use.

◼ If yes, then no further action needed on this step.

◼ If no, then further action may be needed, as:

◼ The EPRI NP-1558 values did not show a range of values for a

particular generic material

◼ The EPRI NP-1558 values did not show the most applicable value for a

generic material

◼ The EPRI NP-1558 values were determined in relation to a specific

research focus and therefore may not be applicable for other uses


EPRI Report 3002018283 Activation Energy Selection

◼ EPRI Report 3002018283, Section B.1.C provides

further information on activation energy selection,

including referral to various industry documents that

have more details on how to perform such selection.

◼ EPRI Report 3002018283, Section B.1.D provides

further information on major sources of activation

energy values, including the EQDB Thermal

Degradation table and the System 1000 Material

Aging and Radiation Effects Library


Conclusions

◼ EPRI Report 3002018283 was issued in 2020 and

supersedes EPRI Report NP-1558

◼ End users of EPRI Report NP-1558 may want to

identify uses of the document and whether the uses

were activation energy related.

◼ End users of EPRI Report NP-1558 activation energy

values should consider any potential changes based

on EPRI Report 3002018283 issuance. Various

factors for potential changes are cited herein.


Conclusions, Continued

◼ EPRI Report 3002018283 provides reference to other

sources for activation energy selection and libraries

◼ EPRI Report 3002018283 also provides topical areas

and related source documents that were issued after

EPRI Report NP-1558 was issued.


Questions?

◼ For EPRI Report related questions:

◼ Drew ManteyPrincipal Project Manager

Plant Support Engineering

484-467-5864

[email protected]

◼ For end user questions and thanks to

Principal Investigators:

◼ Camille Fieseher Richard Butwin

◼ Chris Robins Vice President - Projects

Iepson Consulting Enterprises, Inc.

Office: (843) 742-5798

Fax: (843) 742-5798

Cell: (843) 455-5515

E-Mail: [email protected]

Web: www.iepsonconsulting.com

Together…Shaping the Future of Electricity

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