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NRC | RIN: 3150-AI01 | Publication ID: Fall 2007 |
Title: Amend Fracture Toughness Requirements Against Pressurized Thermal Shock Event | |
Abstract: The proposed rule would amend the Commissions regulations that protect against brittle fracture of reactor vessels during severe cooldown events. The existing regulations establish screening limits that were developed based on what NRC believed to be a conservative probabilistic fracture mechanics analysis. Several licensees will exceed the screening limits in the current rule during their license renewal periods. The staff proposes to provide alternate fracture toughness requirements which reflect the updated technical basis in the proposed rule. | |
Agency: Nuclear Regulatory Commission(NRC) | Priority: Substantive, Nonsignificant |
RIN Status: Previously published in the Unified Agenda | Agenda Stage of Rulemaking: Proposed Rule Stage |
Major: No | Unfunded Mandates: No |
CFR Citation: 10 CFR 50 | |
Legal Authority: 42 USC 2201 42 USC 5841 |
Legal Deadline:
None |
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Timetable:
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Regulatory Flexibility Analysis Required: No | Government Levels Affected: None |
Small Entities Affected: No | |
Included in the Regulatory Plan: No | |
RIN Data Printed in the FR: No | |
Agency Contact: George M. Tartal Nuclear Regulatory Commission Office of Nuclear Material Safety and Safeguards, Washington, DC 20555-0001 Phone:301 415-0016 Email: george.tartal@nrc.gov |