Document: NUREG-0800
Document ID: 61fe4e89-2b5f-4b6e-9b2c-7d39d3b733c9
Document Type: srp
Title: respectively, the Reactor Systems Branch as part of its primary review
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340649.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.2
CFR Part: 
CFR Title: 

Content:
adiolysis with a yield comparable to that of polyethylene (Reference 4). Unqualified paints (organic or inorganic), those that do not meet the acceptance criteria of this Standard Review Plan section, are assumed to form solid debris under DBA conditions. Unqualified paints that contain only organic materials and that do not meet the acceptance criteria of this Standard Review Plan section, are assumed to generate hydrogen by radiolytic decomposition with a yield comparable to that of organic polymers (Reference 4). If combustible gases such as hydrogen and methane can be generated, the reviewer notifies the Containment Systems Branch if this source is not included in Section 6.2.5 of the SAR. If a system to control combustible vapors is not provided, then the release of volatile alkanes to form organic iodides is of additional concern. The yield of organic iodides relative to the total iodine released after a DBA is estimated using the data of Reference 5 and any applicable experimental results submitted by the applicant. The Accident Evaluation Branch should be notified of the estimated organic iodide formation. 6.1.2-2 Rev. 2 - July 1981 If solid debris can be produced, the Containment Systems Branch and Reactor Systems Branch should be notified of the quantity of debris that can result from decomposition of unqualified materials. If the Containment Systems Branch determines that the solid debris can reach the containment recirculation sump, the Reactor Systems Branch determines the effects of the debris on the operation of post-accident fluid systems. Any exception to Regulatory Guide 1.54 involving quality assurance and quality control requirements should be referred to the Quality Assurance Branch for review and resolution. Adverse interactions, if any, under DBA conditions, between the potential decomposition products, namely hydrogen and solid debris, and the engineered safety features are evaluated under SRP Sections 6.2.5 and 6.2.2, respectively. IV.