Document: NUREG-0800
Document ID: 307194c1-0b51-4a4d-bd65-440bb260c4bb
Document Type: srp
Title: PROCESS AND POST-ACCIDENT SAMPLING SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350552.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.2
CFR Part: 
CFR Title: 

Content:
e to sample the bulk volume of the tank and to avoid sampling from low points or from potential sediment traps. For process stream samples, sample points should be located in turbulent flow zones. The guide- lines of regulatory position C.6 in Regulatory Guide 1.21, (reference 1) are used to meet these criteria. I b. Provisions should be made to assure representative samples from gaseous process streams and tanks in accordance with ANSI N13.1-1969 (refer- ence 3). The guidelines of regulatory position C.6 in Regulatory Guide 1.21 (reference 1) are followed to meet this criterion. c. Provisions should be made for purging sampling lines and for reducing plateout in sample lines (e.g., heat tracing). The guidelines of regulatory position C.7 in Regulatory Guide 1.21 (reference 1) are followed to meet this criterion. I d. Provisions should be made to purge and drain sample streams back to the system or origin or to an appropriate waste treatment system in accordance with the requirements of 10 CFR Part 20, § 20.1(c) to keep radiation exposures as low as is reasonably achievable. The guide- lines of regulatory positions 2.d.(2), 2.f.(3), and 2.f.(8) in Regu- latory Guide 8.8 (reference 5) are followed to meet this criterion. e. .Isolation valves should fail in the closed position, in accordance with the requirements of GDC 60 in Appendix A to 10 CFR Part 50 to control the release of radioactive materials to the environment. I f. Passive flow restrictions to limit reactor coolant loss from a rup- ture of the sample line should be provided in accordance with the requirements of 10 CFR Part 20, § 20.1(c) to keep radiation exposures to as low as reasonably achievable and the requirements of GDC 60 I 9.3.2-4 Rev. 2 - July 1981 in Appendix A to 10 CFR Part 50 to control the release of radioactive materials to the environment. The guidelines of position 2.i.(6) in Regulatory Guide 8.8 (reference 5) should be followed to meet this criterion; Passive flow restrictions in the