Document: NUREG-0800
Document ID: 35cc4067-cb3a-4cce-af56-bc0c3fd56f33
Document Type: srp
Title: PRESSURE SUPPRESSION POOL AS A FISSION PRODUCT CLEANUP SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600409.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.5
CFR Part: 
CFR Title: 

Content:
using this section must not be used to justify removal of the standby gas treatment or other filtered exhaust system from status as engineered safety features, and any change in plant design, proposed testing, surveillance or maintenance must be supported by considerations of lowered operator dose and other projected benefits. For such plants, the charcoal filters must be maintained at least to the minimum level of Table 1 in Regulatory Guide 1.52 , Rev. 3. Acceptable methods for computing fission product retention by the suppression pool are given in this document in subsection III, "REVIEW PROCEDURES." 6.5.5-5 Revision 1 - March 2007 While granting credit for suppression pool scrubbing in the calculations of accident doses, the acceptance criteria of containment leakage in SRP Section 6.2.1.1.C and the acceptance criteria of the engineered safety feature atmosphere cleanup systems in SRP Section 6.5.1 should still be met. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 41 requires, in part, that systems be provided as necessary to control fission products which may be released into the reactor containment to reduce the concentration and quality of fission products released to the environment following postulated accidents. The radiological consequences of accidents in Chapter 15 of the safety analysis report (SAR) are dependent on the quantity and quality of fission products released from containment. If Chapter 15 analysis takes credit for the suppression pool, then this system is relied upon to provide an effective means for removal of fission products released within the drywell during a design basis accident. Fission products are entrained in the suppression pool and are unavailable for leakage from containment. Compliance with GDC 41 ensures that the suppression pool will adequately meet its post accident safety