Document: NUREG-0800
Document ID: 243e1ce7-857c-48e4-9eb7-6125311da9be
Document Type: srp
Title: RESIDUAL HEAT REMOVAL (RHR) SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070437.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.7
CFR Part: 
CFR Title: 

Content:
and SRP Section 3.2.2). Meet 180 SSE and single failure without manual operation inside containment. TABLE 1. POSSIBLE SOLUTION FOR FULL COMPLIANCE WITH BTP RSB 5-1 AND RECOMMENDED IMPLEMENTATION FOR CLASS 2 PLANTS Design Requirements Process and [System or Component] Possible Solution for Full Compliance Recommended Implementation for of BTP RSB 5-1 Class 2 Plants (see Note 1) DRAFT Rev. 4 - April 1996 5.4.7-28 Boration for cold shutdown [CVCS Provide procedure and upgrading Same as above. and boron sampling] where necessary such that boration to cold shutdown concentration meets the requirements of I. Solution could range from (1) upgrading and adding valves to have both letdown and charging paths safety grade and meet single failure to (2) use of backup procedures involving less cost. For example, boration without letdown may be acceptable and eliminate need for upgrading letdown path. Use of ECCS for injection of borated water may also be acceptable. Need surveillance of boron concentration (boronometer and/or sampling). Limited operator action inside or outside of containment if justified. II. RHR Isolation RHR System Comply with one of allowable Compliance required. (Plants normally arrangements given. meet the requirement under existing SRP Section 5.4.7). III. RHR Pressure Relief RHR System Determine piping etc. needed to meet Compliance will not be required if it is Collect and contain relief of disposing of discharge are available. discharge requirement to provide in design. shown that adequate alternate methods V. Test Requirement Run tests confirming analysis to meet Compliance required. Meet R.G. 1.68. For PWRs test plus analysis for cooldown under natural circulation to confirm adequate mixing and cooldown within limits specified in EOP. requirement. TABLE 1. POSSIBLE SOLUTION FOR FULL COMPLIANCE WITH BTP RSB 5-1 AND RECOMMENDED IMPLEMENTATION FOR CLASS 2 PLANTS Design Requirements Process and [System or Component] Possible Solution for Full