Document: NRC Regulatory Guide
Document ID: c7a40fcc-fc9d-4eb2-ad86-f9f5b0f04c82
Document Type: regulatory_guide
Title: Plant-Specific, Risk-Informed Decisionmaking:  Technical Specifications (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1920/ML19206A489.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.177
CFR Part: 
CFR Title: 

Content:
. Plant-specific data on shutdown operations: To analyze shutdown phases in detail, plant-specific information may be needed, such as operating and abnormal procedures, shift supervisor’s log books, or monthly operating reports. Data on timing of the plant shutdown and operational preferences of equipment during plant shutdown can be extracted from this information. b. Plant-specific deterministic data: The evaluation of heatup and recovery scenarios, including estimates of heatup time, requires some design data on the plant, such as the temperature of the ultimate heat sink or the cooling capacity of the RHR system. These data typically are available from the plant’s final safety analysis report. c. Frequency of transients during controlled shutdown: The LERs for the plant may need to be reviewed in order to evaluate the likelihood of transients during controlled shutdown. The likelihood of a transient during a shutdown may differ from that during power operation (this should be considered). REFERENCE2 1. NRC, NUREG/CR-6141, BNL-NUREG-52398, “Handbook of Methods for Risk-Based Analyses of Technical Specifications,” December 1994, Washington, DC (ADAMS Accession No. ML093090361). 2 Publicly available NRC published documents are available electronically through the NRC Library on the NRC’s public Web site at http://www.nrc.gov/reading-rm/doc-collections/ and through the NRC’s Agencywide Documents Access and Management System (ADAMS accession No. ML093090361) at http://nrc.gov/reading-rm/adams.html. The documents can also be viewed online or printed for a fee in the NRC’s Public Document Room (PDR) at 11555 Rockville Pike, Rockville, MD. For problems with ADAMS, contact the PDR staff at 301-415-4737 or (800) 397-4209; fax (301) 415-3548; or e-mail pdr.resource@nrc.gov.