Document: NUREG-0800
Document ID: 66e7af3b-21c0-444f-8737-0830bb176eba
Document Type: srp
Title: PROCESS AND EFFLUENT RADIOLOGICAL MONITORING INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15029A182.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
CFR Part: 
CFR Title: 

Content:
UREG-0737, Item II.B.3 (Clarification Items 1, 3, 6, and 11); Item II.E.4.2 (Clarification Items 2, 5, and 7 and Attachment 1); Item II.F.1, Attachment 1 on noble gas effluent monitors; Item III.D.1.1 (Clarification Items 1 and 3); Item III.D.3.3 11.5-21 Revision 6 – January 2016 (Clarification Items 1 to 4); and letter from D.G. Eisenhut, dated August 16, 1982. Using the guidance of SRP Sections 9.3.2 and 13.3, the applicant’s should address these aspects in the emergency plan and implementing procedures. For any portion of the PERMISS accident monitoring systems that supports safety-related functions, as identified by the applicant, the review of these design features is performed under SRP Chapter 7 using the guidance of RG 1.97 and BTP 7-10. The review, using RG 1.97 and RG 1.151, “Instrument Sensing Lines,” addresses the performance, design, qualification, display, QA, and selection of monitoring variables of radiation monitoring equipment required for accident monitoring and sampling. The principal functional capabilities should: A. Include purging lines to flush sampling lines and return purging fluids to the appropriate systems for collection or treatment. B. Include design features that minimize sample losses by reducing the length and bending radii of sample lines in ensuring that samples are representative of reactor primary coolant, reactor steam, secondary coolant, and process steam. C. Maximize sample quality and integrity by reducing conditions that would distort a sample’s chemical and physical compositions. D. Prevent blockage of sample lines by foreign matters or dual phase flows. E. Minimize sampling flow restrictions and using remotely operated isolation valves to limit reactor coolant loss from ruptured sample lines. F. Use sampling lines that are as short as practicable in minimizing the volume of process fluid taken from containment process, system processes, and effluent streams. G. For inline radiation monitoring, design should