# Clarification on Endorsement of Nuclear Energy Institute Guidance in Designing Digital Upgrades in Instrumentation and Control Systems
> **Nuclear Regulatory Commission** · Regulatory issue summary; issuance. · Published 2018-06-25 · 83 FR 29437
## Document
- **Document number:** 2018-13570
- **Category:** other
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 83 FR 29437
- **Publication date:** 2018-06-25
- **Energy docket:** NRC-2017-0154
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) issued a Regulatory Issue Summary (RIS) entitled, RIS 2002-22, Supplement 1, "Clarification on Endorsement of Nuclear Energy Institute Guidance in Designing Digital Upgrades in Instrumentation and Control Systems." This RIS supplement clarifies RIS 2002-22, which remains in effect. The NRC continues to endorse Nuclear Energy Institute (NEI)-01-01, as stated in RIS 2002-22 and clarified RIS 2002-22, Supplement 1. This RIS supplement clarifies the guidance in RIS 2002-22 for preparing and documenting qualitative assessments that licensees can use to develop written evaluations to address the criteria in NRC's regulations for digital instrumentation and control (I&C) modifications. This clarification is intended to reduce regulatory uncertainty for licensees applying the process set in the NRC's regulations and making digital I&C modifications without prior NRC approval.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/06/25/2018-13570/clarification-on-endorsement-of-nuclear-energy-institute-guidance-in-designing-digital-upgrades-in)
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