ML24089A053
| ML24089A053 | |
| Person / Time | |
|---|---|
| Issue date: | 04/29/2024 |
| From: | Christian Araguas NRC/RES/DRA/HFRB |
| To: | Mike Franovich Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML24089A051 | List: |
| References | |
| RIL-2024-04 | |
| Download: ML24089A053 (1) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 MEMORANDUM TO: Michael X. Franovich, Director Division of Risk Assessment Office of Nuclear Reactor Regulation FROM: Christian Araguas, Director Division of Risk Analysis Office of Nuclear Regulatory Research
SUBJECT:
RESEARCH INFORMATION LETTER (RIL) 2024-04, HUMAN RELIABILITY ANALYSIS FOR CALCULATING EFFECTS OF PERFORMANCE INFLUENCING FACTORS: A REVIEW OF HISTORICAL APPROACHES Enclosed for your information and use is Research Information Letter (RIL) 2024-04, Human Reliability Analysis for Calculating Effects of Performance Influencing Factors: A Review of Historical Approaches.
RES developed the Integrated Human Event Analysis System for Event and Conditional Assessment (IDHEAS-ECA) human reliability analysis (HRA) method by the direction of SRM-M140529 the staff should develop application specific guidance as part of its Integrated Decision-tree Human Event Analysis System (IDHEAS) project. The ACRS recommended the Commission (ADAMS Accession No. ML21076A421) that IDHEAS-ECA provides a specific derived application... Peer review is needed.
This report captures research completed by Pacific Northwest National Laboratory (PNNL) under contract by RES/DRA, to evaluate whether technical discrepancies between IDHEAS-ECA and various existing HRA methods in modeling performance influencing factors (PIFs) cutdown IDHEAS-ECAs technical basis. Specifically, IDHEAS-ECA uses addition to combine multiple PIFs effects on human error probabilities (HEP) while other HRA methods rely on multiplication to account for the combined effects; and IDHEAS-ECA distinguishes two types of PIF effects (base HEP and multiplier) while others only have multiplier.
PNNL interviewed the developers of the HRA methods of interest and concluded that their PIF models follow a legacy practice and do not have sound technical bases against IDHEAS-ECAs PIF model, which was supported by a few meta studies and data analyses.
CONTACT: Y. James Chang, RES/DRA/HFRB 301-415-2378, James.Chang @nrc.govApril 29, 2024 Signed by Araguas, Christian on 04/29/24
M. Franovich 2
The staff intends to move forward with posting this document on NRCs RIL public website 14 days after the date of this memo.
Please notify the responsible staff contact if you have any questions concerning the impending publication of this report.
Enclosure:
ML24089A051; ML24089A053 OFFICE RES/DRA/HFRB NRR/DORL/LPMB NRR/DRA/APOB RES/DRA NAME YHsien YH MValentin-OlmedaMV AZoulis AZ CAraguas CA DATE Apr 1, 2024 Apr 1, 2024 Apr 4, 2024 Apr 29, 2024