Document: NUREG-0800
Document ID: 0513eafb-8911-4410-853b-e2ec7a00ee07
Document Type: srp
Title: RADIATION SOURCES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070616.pdf
Revision Date: 2023-06
Chapter: 12
Section ID: 12.2
CFR Part: 
CFR Title: 

Content:
207, §20.1301, and §20.1801 as they relate to evaluation of 23 12.2-7 DRAFT Rev. 3 - April 1996 source terms and the related provisions of 10 CFR Part 50, GDC 61, and supplemented by the guidance of Regulatory Guide 1.112, NUREG-0718, NUREG-0737, and ANSI Standard N237-1976. The applicant has provided a description of contained and airborne radioactivity sources used as inputs for the dose assessment and for shielding and ventilation designs. Also included are the applicant's assumptions in arriving at quantitative values for these contained and airborne source terms, based on ANSI N237, Regulatory Guide 1.112, General Design Criterion 61, and 10 CFR Part 20, §20.101, §20.103 and §20.104§20.1201, §20.1202, §20.1203, §20.1204, §20.1206, §20.1207 . For post-accident shielding for vital area access, the source terms in 24 NUREG-0737 were used. During power operation, the greatest potential for personnel dose during operation is inside the containment due to nitrogen-16, noble gases, and neutrons. Outside the containment, and after shutdown inside the containment, the primary sources of personnel exposure are fission products from fuel clad defects, and activation products, including activated corrosion products. The coolant and corrosion activation product source terms are based on operating experience from reactors of similar design; allowances are included for the buildup of activated corrosion products. Neutron and prompt gamma source terms are based on reactor core physics calculations and operating experience from reactors of similar design. Other parameters used, as well as a complete description of the routine operation source term development, are contained in Chapter 11. The accident source terms are based on NRC Short-Term Lessons Learned recommendation in NUREG-0737. The source terms presented are comparable to estimates by other applicants with similar designs. Almost all of the airborne radioactivity within the plant is due to equipment leakage.