Document: NUREG-0800
Document ID: 5c379bc2-cb0b-42ca-93af-dedf43c6cb30
Document Type: srp
Title: Appendix 7-A
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500542.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
fied by Reg. Guide 1.97 may be acceptable if supported by analyses demonstrating that the indication would remain on scale with appropriate margins for any design basis event or accident for which the instrumentation might be required for operator information. An appropriate margin should include allowance for analytical uncertainties and instrumentation uncertainties. However, Reg. Guide 1.97 identifies that, for a limited number of functionally significant variables (e.g., containment pressure or primary system pressure), instrument ranges should extend beyond those values that the selected variables can attain under limiting conditions. Alternate Instrumentation The use of alternate instrumentation to monitor variables different than those identified in Reg. Guide 1.97 is acceptable, provided that: a. The alternate instrumentation fulfills the purpose of the variables identified in Reg. Guide 1.97; b. The alternate instrumentation conforms to the design and qualification criteria for the variables identified in Reg. Guide 1.97; and c. No credit is taken by the applicant/licensee in post-accident procedures, emergency operating procedures, or functional recovery guidelines for indication of the variables identified in Reg. Guide 1.97 for which the alternative instrumentation is proposed. Guidance for Boiling Water Reactor (BWR) and Pressurized Water Reactor (PWR) Variables Table 1 ("BWR Variables") and Table 2 ("PWR Variables") of Reg. Guide 1.97, Revision 2, and Table 2 ("BWR Variables") and Table 3 ("PWR Variables") of Reg. Guide 1.97, Revision 3, identify guidelines for the range, the design/qualification category, and the purpose for specific BWR and PWR variables. Acceptable deviations from or clarifications to Reg. Guide 1.97 for selected BWR and PWR variables Rev. 4 — June 1997 Appendix 7-A BTP HICB-10-4 identified in those tables are identified on Table 1 and Table 2 (respectively) of this BTP. Presented in Tables 1 and 2 are identification of the Reg.