AMPP Store - Products tagged with 'modelling'

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ESG and PHMSA’s Mega Rule Have Necessitated Advancements in Hydrotesting and Abandonment of Offshore and Onshore Pipelines

Product Number: 51323-18982-SG

Author: A.R. Trueman

Publication Date: 2023

$20.00

The work here is the culmination of many years of prior effort in the development of an atmospheric corrosion model and accompanying sensors. Atmospheric corrosion is a complicated process where many factors interact to determine if it occurs and its severity. These factors can be separated into three general categories: environmental, surface salts, and materials.

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Feasibility Assessment for Cathodic Protection of High Level Nuclear Waste Tanks

Product Number: 51324-21160-SG

Author: Kenton Lawson; Bruce Wiersma; Barbara Nicole Padgett; Sandeep Chawla; John Beavers

Publication Date: 2024

$40.00

This paper summarizes an assessment of the feasibility of implementing cathodic protection (CP) as an internal corrosion prevention strategy for nuclear waste storage tanks. The study investigates the principles of cathodic protection and its applicability to the unique environment of nuclear waste storage. By reviewing the relevant literature, this research explores the various threats and challenges associated with implementing CP in this specific context. A boundary element analysis (BEA) model of a steel tank with a simplified impressed current cathodic protection (ICCP) system was developed using polarization curves that were experimentally measured from coupons in simulated waste. This model was developed to evaluate the interaction of electrochemical potentials of the various waste layers within the tank. The modeling results indicate that the simulated ICCP system is capable of shifting the polarized potentials of the internal tank surfaces to levels required to mitigate stress corrosion cracking (SCC) and corrosion.

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K / Size Effects on the Crack Growth Rate of Irradiated Stainless Steels of Boiling Water Reactors

Product Number: ED22-17304-SG

Author: Masato Koshiishi, Ryoji Obata, Shigeaki Tanaka

Publication Date: 2022

$20.00

Irradiation assisted stress corrosion cracking (IASCC) is a phenomenon caused by neutron irradiation of austenitic stainless steels (SSs). The crack growth rates (CGRs) of IASCC for boiling water reactor (BWR) components are needed for assessments to ensure component integrity. The CGR formula has been proposed as a function of the stress intensity factor (K).

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Material Testing and FFS Modelling for HTHA of Less-Common Alloys: C-0.3Mo

Product Number: 51324-21142-SG

Author: Jorge Penso; Nathaniel Sutton; Brandon Rollins

Publication Date: 2024

$40.00

Tremendous attention has been devoted to understanding the behavior of common engineering alloys in high temperature hydrogen service. Nelson curves from API RP 9411 are available for the alloys most widely used in HTHA service. However, the aging international fleet of equipment in hydrogen service, across the refining, petrochemical and fertilizer industries means that in-service equipment constructed from less-common alloys must sometimes be evaluated for HTHA. The authors are involved with an 10-year joint industry project studying HTHA. One major outcome of this project is a volumetric HTHA damage FFS model which incorporates stresses from methane pressure within the material into an MPC Omega Multiaxial damage formula. A crack growth model using the fracture mechanics parameter C* (commonly used in creep crack growth)12 is also under development. These two are related in that the C* crack growth law parameters can be calculated utilizing the MPC Omega material creep properties. With sufficient creep data for an uncommon alloy like C-0-.3Mo, lot centered MPC Omega creep properties can be regressed. Such data have been compiled by the authors and resulting Omega creep properties are reported. These creep properties, along with other material properties, are used in the HTHA damage progression and the C* crack growth models. Model predictions using this approach are compared to historically available ex-service HTHA data from API RP 9411 for alloys with Mo contents between that of carbon steel and C-0.5Mo. Selective testing (creep and crack growth testing in both air and hydrogen environments) is in-progress to verify the FFS approach.

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Some Effects Of Surface Finish And LWR Environment On Environmentally-Assisted Crack Initiation In Alloy 182

Product Number: ED22-18329-SG

Author: M. Vankeerberghen, R.-W. Bosch, A. Dinu, M. Grimm, A. Hojná, P. J. Meadows, R. Novotny, F. Perosanz, Z. Que, S. Ritter, F. Scenini, A. Toivonen, L. Volpe, B. Zajec

Publication Date: 2022

$20.00

Environmentally-assisted cracking (EAC) of nickel-base alloys has been observed in the primary coolant of light water reactors (LWRs). One of the main issues is primary water stress corrosion cracking (PWSCC) of Alloy 182 which has been a concern for a long time. For assumed or existing defects, disposition curves (crack growth rate as function of stress intensity factor) are available.

Products tagged with 'modelling'

ESG and PHMSA’s Mega Rule Have Necessitated Advancements in Hydrotesting and Abandonment of Offshore and Onshore Pipelines

Feasibility Assessment for Cathodic Protection of High Level Nuclear Waste Tanks

K / Size Effects on the Crack Growth Rate of Irradiated Stainless Steels of Boiling Water Reactors

Material Testing and FFS Modelling for HTHA of Less-Common Alloys: C-0.3Mo

Some Effects Of Surface Finish And LWR Environment On Environmentally-Assisted Crack Initiation In Alloy 182

Association for Materials Protection and Performance