Document: NUREG-0800
Document ID: 05a0fdd9-0a00-4f51-a025-7b071e1fb505
Document Type: srp
Title: PROTECTIVE COATING SYSTEMS (PAINTS) - ORGANIC MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070455.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.1.2
CFR Part: 
CFR Title: 

Content:
e, a conservative analysis is required. The environmental conditions for the test and analysis must be comparable to those specified in Section 3.11 of the SAR. In the absence of test data on specific coating systems and organic materials, the data in Reference 36 may be used to estimate the rates of hydrogen formation 15 from zinc primers and from zinc primers plus topcoats. Cable insulation is assumed to generate hydrogen by radiolysis with a yield comparable to that of polyethylene (Reference 47 ). 16 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 47 ). 17 If combustible gases such as hydrogen and methane can be generated, the reviewer notifies the Containment Systems Branch SCSB if this source is not included in Section 6.2.5 of the SAR. 18 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 53 and any applicable experimental results submitted by the applicant. The 19 Accident Evaluation Branch Emergency Preparedness and Radiation Protection Branch (PERB) should be notified of the estimated organic iodide formation. 20 If solid debris can be produced, the Containment Systems Branch SCSB and Reactor Systems 21 Branch SRXB should be notified of the quantity of debris that can result from decomposition 22 of unqualified materials. If the Containment Systems Branch SCSB determines that the solid 23 debris can reach the containment recirculation sump, the Reactor