# 2025-20929: Nuclear Regulators Study How Humans Mess Up Nuclear Plants

2025-20929, Research Information Letter Report: Integrated Human Event Analysis System Dependency Analysis Guidance (IDHEAS-DEP), is a Federal Register notice from Nuclear Regulatory Commission published 2025-11-25, effective Submit comments by January 26, 2026. (as of 2026-06-08).

- Canonical: https://policyrisk.com/federal-register/2025-20929
- As of: 2026-06-08
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-20929
- Title: Research Information Letter Report: Integrated Human Event Analysis System Dependency Analysis Guidance (IDHEAS-DEP)
- Type: Notice
- Agencies: Nuclear Regulatory Commission
- Citation: 90 FR 53402
- Published: 2025-11-25
- Effective: Submit comments by January 26, 2026.
- Comments close: 2026-01-26
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-08

## In one line

Nuclear Regulators Study How Humans Mess Up Nuclear Plants

## Summary

The Nuclear Regulatory Commission wants your thoughts on new guidance that helps analyze how people depend on each other during nuclear events. This update affects anyone involved in nuclear safety and human reliability analysis, aiming to improve how risks are understood and managed. You’ve got until January 26, 2026, to share your feedback—no cost to comment, just your smart ideas!

## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is seeking public comment on the Research Information Letter (RIL) report, "Integrated Human Event Analysis System Dependency Analysis Guidance (IDHEAS- DEP)," which establishes guidance that documents how to perform a dependency analysis using the dependency model included in Integrated Human Event Analysis System for Event and Condition Assessment (IDHEAS- ECA) method for human reliability analysis (HRA).

## Effects PRIA read

- NRC human dependency analysis guidance: benefit, low. The Nuclear Regulatory Commission released Research Information Letter RIL 2021-14, "Integrated Human Event Analysis System Dependency Analysis Guidance (IDHEAS-DEP)," which documents how to perform dependency analysis for human reliability analysis. The report includes worksheets, templates, and t…

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## Sources
- [2025-20929 on federalregister.gov](https://www.federalregister.gov/documents/2025/11/25/2025-20929/research-information-letter-report-integrated-human-event-analysis-system-dependency-analysis)
- [2025-20929 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-11-25/pdf/2025-20929.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2025-20929 (as of 2026-06-08).