In this paper, we developed both the deterministic and a risk-informed P-T limits curve for an APR1400 reactor using Appendix G of the ASME Code, Section XI and compare the results in terms of additional operational margin. The risk-informed P-T limits curve is known to provide more operational flexibility, particularly for reactor pressure vessels with relatively high irradiation levels and radiation sensitive materials. This alternative methodology provides a simple procedure to develop risk-informed P-T limits for heat up, cool down, and hydrostatic test events. Risk-informed means that we can consider insights from a probabilistic risk assessment by using this methodology. Recently, an alternative risk-informed methodology has been added in the ASME Code. Appendix G of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section XI, provides deterministic procedures to develop the P-T limits curve for the reactor pressure vessel. We call it a pressure-temperature limits curve ( P-T limits curve). [KEPCO International Nuclear Graduate School, Ulsan (Korea, Republic of)Ī reactor pressure vessel (RPV) in a nuclear power plant has operational limits of pressure and temperature to prevent a potential drastic propagation of cracks due to brittle fracture. (author) 23 refs, 88 figs, 17 tabs.Īpplication of the risk-informed methodology for APR1400 P-T limits curve This report include the results of the comparison of the procedure and method used by the participants, and sensitivity study of the key parameters. Each Participant used its own approach to construct the P-T limit curve and submitted the results, By analyzing the results, the reference procedure for the P-T limit curve could be established. The purpose of the round robin is to compare the procedure and method used in various organizations to construct P-T limit curve to prevent brittle fracture of reactor pressure vessel of nuclear power plants. This report is the summary of the analysis results for the P-T Limit Curve construction which have been subjected to the round robin analysis. [Korea Electric Power Research Institute, Taejon (Korea) It does not store any personal data.Reactor Pressure Vessel P-T Limit Curve Round RobinĮnergy Technology Data Exchange (ETDEWEB) The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is used to store the user consent for the cookies in the category "Other.
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