Document: NUREG-0800
Document ID: c544c383-46ca-4e10-8688-4fd295af8a61
Document Type: srp
Title: provide guidance in evaluating the source terms and doses from gaseous effluents
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1304/ML13044A644.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.4
CFR Part: 
CFR Title: 

Content:
G 1.206, Part I, C.I.3, Sections 3.2.1 and 3.2.2 and SRP Section 3.8.4 in identifying applicable acceptance criteria in evaluating SSCs requiring seismic design considerations and differences from the recommendations of RG 1.143. 11. Additional clarification is provided on the use of automatic control features and placement of isolation valves and radiation detectors on process piping and effluent discharge lines to ensure the timely closure of such valves upon the detection of elevated radioactivity levels, and, if part of the design, controls in monitoring deviations of in-plant dilution flow rates in terminating releases or isolating process flows when deviations exceed preset limits. Other considerations include determining whether system logic demands that a valve or damper should fail in the closed position in protecting the system from further contamination, terminating releases to the environment, or diverting process streams or effluents to appropriate treatment subsystems. 12. For ESP applications, clarification is provided in reviewing the estimates of the source terms of liquid radioactive effluents and radionuclide concentration levels at the site 11.2-42 Draft Revision 5 – August 2014 boundary. For a source term based on a single type of reactor design, the staff will confirm that the applied source term is consistent with that presented in the current revision of the DC for the selected reactor technology. For a source term based on two or more types of reactor designs, the staff will confirm that the source term, as a plant parameter envelope, is consistent with that presented in the current revision of each DC and conservatively bounding over all expected radionuclides and estimate of releases. 13. For ESP applications, clarification is provided for the staff in reviewing the results of a bounding dose assessment and demonstrate the capability to comply with 10 CFR Part 20 dose limits and 10 CFR Part 50, Appendix I design objectives. The staff’s