Document: NRC Regulatory Guide
Document ID: 7a56bfb8-74a8-4e94-beee-41e3e51e0cc2
Document Type: regulatory_guide
Title: Wide-Range Spent Fuel Pool Level Instrumentation + HISTORY - HISTORY 11/2015 – DG-1317 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1424/ML14245A454.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.227
CFR Part: 
CFR Title: 

Content:
, Rev. 1: 3.4 Qualification - Guidance The second bullet under subheading “Guidance” states that “…instrument channel reliability shall be demonstrated…” for the “…effects of shock and vibration on instrument channel components used during any applicable event for only installed components…” Staff Position: The demonstration of reliability applies to the “effects of shock and vibration on instrument channel components used during and following any applicable event for installed components.” Regardless of plant design basis, components of the instrument channels should be qualified for shock and vibration using one or more of the following methods: DG-1317, Page 6 • components are supplied by manufacturers using commercial quality programs (such as ISO 9001, “Quality Management Systems - Requirements” [Ref. 18]) with shock and vibration requirements included in the purchase specification at levels commensurate with portable hand-held device or transportation applications; • components have a substantial history of operational reliability in environments with significant shock and vibration loading, such as portable hand-held device or transportation applications; or • components are inherently resistant to shock and vibration loadings, such as cables. Instrument channel reliability should be demonstrated via an appropriate combination of design, analyses, operating experience, and/or testing of channel components for the effects of shock and vibration on all instrument channel components, rather than only installed components. This exception is needed to strengthen the guidance in NEI 12-02, Rev. 1 by recommending that portable instrument channel components should be designed as hand-held devices or similar rugged components. Additionally, this clarification is intended to remove the potential confusion regarding the extent of design basis shock and vibration loadings that may be different from the design basis seismic loadings. The