federal_register: E9-31146

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document_number title type abstract publication_date pub_year pub_month html_url pdf_url agency_names agency_ids excerpts regulation_id_numbers
E9-31146 Alternate Fracture Toughness Requirements for Protection Against Pressurized Thermal Shock Events Rule The Nuclear Regulatory Commission (NRC) is amending its regulations to provide alternate fracture toughness requirements for protection against pressurized thermal shock (PTS) events for pressurized water reactor (PWR) pressure vessels. This final rule provides alternate PTS requirements based on updated analysis methods. This action is desirable because the existing requirements are based on unnecessarily conservative probabilistic fracture mechanics analyses. This action reduces regulatory burden for those PWR licensees who expect to exceed the existing requirements before the expiration of their licenses, while maintaining adequate safety, and may choose to comply with the final rule as an alternative to complying with the existing requirements. 2010-01-04 2010 1 https://www.federalregister.gov/documents/2010/01/04/E9-31146/alternate-fracture-toughness-requirements-for-protection-against-pressurized-thermal-shock-events https://www.govinfo.gov/content/pkg/FR-2010-01-04/pdf/E9-31146.pdf Nuclear Regulatory Commission 383 The Nuclear Regulatory Commission (NRC) is amending its regulations to provide alternate fracture toughness requirements for protection against pressurized thermal shock (PTS) events for pressurized water reactor (PWR) pressure vessels. This final rule...  

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