Document: NUREG-0800
Document ID: 71224475-ca63-4c09-acc1-c682d58112dd
Document Type: srp
Title: Revision 5 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550082.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
the guidelines identified in Regulatory Guide 1.97, per NUREG-0737, Supplement 1, “Clarification of TMI Action Plan Requirements: Requirements for Emergency Response Capability.” Drywell sump and drywell drain sumps level • Category • Direct measurement Category 3 instrumentation (e.g., flow instrumentation) is an acceptable alternative to Category 1 instrumentation for this variable if it can be shown that: a. For small leaks, the alternate instrumentation will not experience a harsh environment; and b. For larger leaks, the sumps fill promptly and the sump drain lines isolate due to the increase in drywell pressure, negating the need for the measurement; and c. Drywell pressure and temperature indication can be used to detect leakage into the drywell; and d. The instrumentation neither automatically initiates nor alerts the operator to initiate operation of a safety system in a post-accident situation. Primary containment isolation valve position Redundancy Redundant position indication for each active containment isolation valve is not necessary because the valves are redundant. Likewise, position indication is not necessary for valves within the operator’s cognizance that are normally closed and remain closed after an accident, and that are administratively controlled. BTP 7-10-8 Revision 5 - March 2007 Table 1 (cont.). For BWRs: Acceptable Deviations and Clarifications to Revisions 2 and 3 of Regulatory Guide 1.97 Variable Deviation Acceptance Guidelines/Clarification Primary system safety relief valve positions, including ADS or flow through pressure in valve lines Category Category 3 safety relief valve position indication is an acceptable alternative to Category 2 instrumentation for this variable, provided that a plant-specific evaluation documents that the analysis of NEDO-33160, “Regulatory Relaxation for the Post Accident SRV [Safety Relief Valve] Position Indication System,” applies to the plant and that the requirements of NUREG- 0737,