Document: NUREG-0800
Document ID: c857bf88-7f70-4d0a-a004-bb765dcfa21b
Document Type: srp
Title: RADIATION SOURCES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070710496.pdf
Revision Date: 2023-06
Chapter: 12
Section ID: 12.2
CFR Part: 
CFR Title: 

Content:
ntitative values for these contained and airborne source terms, based on ANSI N237, Regulatory Guide 1.112, General Design Criterion 61, 10 CFR 20.1201, 10 CFR 20.1202, 10 CFR 20.1203, 10 CFR 20.1204, 10 CFR 20.1206, and 10 CFR 20.1207. For postaccident shielding for vital area access, the applicant used the source terms in NUREG-0737 and Regulatory Guide 1.183. During power operation, the greatest potential for personnel dose is inside the containment from 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. Chapter 11 contains other parameters used, as well as a complete description of the routine operation source term development. The accident source terms are based on the NRC short-term lessons learned recommendation in NUREG-0737 and the alternate accident source term in Regulatory Guide 1.183. The source terms presented are comparable to estimates by other applicants with similar designs. Almost all of the airborne radioactivity within the plant results from equipment leakage. The applicant has provided a tabulation of the maximum expected routine radioactive airborne concentrations in equipment cubicles, corridors, and operating areas because of equipment leakage. The bases for these leakage calculations are in accordance with Regulatory Guide 1.112. 12.2-8 Revision 3 - March 2007 The source terms used to develop these airborne concentration values are comparable to estimates by other applicants with similar designs, and