Document: NUREG-0800
Document ID: c37e8c68-ed08-434b-b15c-438f1915858a
Document Type: srp
Title: PROCESS AND POST-ACCIDENT SAMPLING SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070526.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.2
CFR Part: 
CFR Title: 

Content:
. For tanks, provisions should be made 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 guidelines of regulatory position C.6 in Regulatory Guide 1.21, (reference 1) are used to meet these criteria. 21 b. Provisions should be made to assure representative samples from gaseous process streams and tanks in accordance with ANSI N13.1-1969 (rReference 323) . 22 23 The guidelines of regulatory position C.6 in Regulatory Guide 1.21 (reference 1) are followed to meet this criterion. 24 DRAFT Rev. 3 - April 1996 9.3.2-6 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. 25 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)20.1101(b) to keep radiation 26 exposures as low as is reasonably achievable. The guidelines of regulatory positions 2.d.(2), 2.f.(3), and 2.f.(8) in Regulatory Guide 8.8 (reference 5) are 27 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 28 of radioactive materials to the environment. f. Passive flow restrictions to limit reactor coolant loss from a rupture of the sample line should be provided in accordance with the requirements of 10 CFR Part 20, § 20.1(c)20.1101(b) to keep radiation exposures to as low as reasonably 29 achievable and the requirements of GDC 60 in Appendix A to 10 CFR Part 5030 to control the release of radioactive materials to the environment. The guidelines of position 2.i.(6) in Regulatory Guide 8.8 (reference 5)