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Energie en milieu · 15-4-20131 min lezen

Guidance on the Treatment of Uncertainties Associated With PRA in Risk-Informed Decisionmaking

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The Nuclear Regulatory Commission has issued for public comment a document entitled: NUREG-1855, Revision 1, "Guidance on the Treatment of Uncertainties Associated with PRA in Risk-Informed Decisionmaking," Draft Report for Comment.

Oorspronkelijke brontaal: Federal Register — Nuclear Regulatory CommissionOrigineel bericht openen →

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Energie en milieu · 21-8-2026

Draft Interim Staff Guidance: Evaluations of Risk Assessments for Risk-Informed Decision-Making for Regulatory Applications

The U.S. Nuclear Regulatory Commission (NRC) is soliciting public comment on its draft Interim Staff Guidance (ISG), OAR/DARP-ISG- 2026-XX, "Evaluations of Risk Assessments for Risk-Informed Decision- Making for Regulatory Applications." If finalized, this ISG will provide guidance to the staff for reviewing systematic risk assessment methods, including probabilistic risk assessments (PRAs) and other systematic risk evaluations (SREs). This ISG will supplement existing guidance to facilitate the staff's understanding of the uses of risk information in regulatory applications and application of principles of risk-informed decision-making.

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Energie en milieu · 21-8-2026

Draft Regulatory Guide: Assessing Public Health Risk Associated With Chemical Hazards of Licensed Material

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment a draft Regulatory Guide (DG), DG-1444, proposed Regulatory Guide (RG) 1.264, "Assessing Public Health Risk Associated with Chemical Hazards of Licensed Material." This DG describes a methodology that is acceptable to the staff of the NRC to meet regulatory requirements assessing public health risk associated with chemical hazards of licensed material.

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Energie en milieu · 26-8-2026

STP Nuclear Operating Company; South Texas Project, Unit 1; License Amendment Application

The U.S. Nuclear Regulatory Commission (NRC, the Commission) is considering issuance of an amendment to Renewed Facility Operating License No. NPF-76, issued to STP Nuclear Operating Company (STPNOC); Constellation South Texas, LLC; City Public Service Board of San Antonio; and City of Austin, Texas, for operation of South Texas Project, Unit 1 (STP). The proposed license amendment would, if granted, make a one-time exigent change to the technical specifications (TS) to extend the allowed outage time (AOT) for TS 3.7.1.7, "Main Feedwater System". This proposed amendment is being requested to facilitate repairs to the Unit 1 train D main feedwater isolation valve (MFIV). This proposed amendment is being requested under exigent circumstances pursuant to NRC regulations.

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Energie en milieu · 24-8-2026

Arizona Public Service Company; Palo Verde Nuclear Generating Station, Units 1, 2, and 3; Indirect Transfer of Control of Licenses

The U.S. Nuclear Regulatory Commission (NRC, the Commission) is issuing an order approving the application dated April 24, 2026, filed by Arizona Public Service Company (APS), on behalf of Public Service Company of New Mexico (PNM), Troy ParentCo LLC (Troy ParentCo), and their corporate affiliates (together, Applicants). The application sought NRC consent to the indirect transfer of control of PNM's co- ownership of the Renewed Facility Operating License Nos. NPF-41, NPF- 51, and NPF-74 for the Palo Verde Nuclear Generating Station (Palo Verde), Units 1, 2, and 3, respectively, as well as the associated general license for the Palo Verde Independent Spent Fuel Storage Installation (ISFSI) (together, the facility). No physical changes or operational changes to the facility were proposed in the application.

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Energie en milieu · 28-8-2026

Southern Nuclear Operating Company; Vogtle Electric Generating Plant Units 1 & 2; Independent Spent Fuel Storage Installation; Exemption

The U.S. Nuclear Regulatory Commission (NRC) has issued a one- time exemption to Southern Nuclear Operating Company (SNC), authorizing Vogtle Electric Generating Plant Units 1 and 2 (Vogtle 1 and 2) to retain a single Neutron Source Assembly (NSA) in its current storage cell within a multi-purpose canister ((MPC-32), serial number MPC-707) at the Vogtle Independent Spent Fuel Storage Installation, in a manner that is inconsistent with the loading restrictions specified in Certificate of Compliance (CoC) No. 1014, Amendment 11, for the HI- STORM 100S Version B dry storage system. The exemption allows the NSA to remain in a peripheral basket cell, contrary to Appendix B, Table 2.1-1, which restricts NSA containing assemblies to designated interior cells. The NRC's determination is based on SNC's safety evaluation and supporting analyses demonstrating that the configuration continues to meet applicable safety requirements for criticality control, shielding, thermal performance, structural integrity, and confinement.

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