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:
limits, then verification that the dissolved oxygen concentration is below the Technical Specification limits will be mandatory. Verification of hydrogen residual in excess of 10 cubic centimeters (at standard temperature and pressure) per kilogram of reactor coolant will be acceptable in lieu of direct analysis of dissolved oxygen for 20 days. b. To meet the requirements of GDC 60 in Appendix A to 10 COR Part 50, if on-line gas chromatography is used for reactor coolant analyses, special provisions (e.g., pressure relief and purging) should be available to prevent high-pressure carrier gas from entering the reactor coolant. c. To meet the requirements of GDC 60 in Appendix A to 10 CFR Part 50, passive flow restrictions in the sampling lines may be replaced by redundant, fully qualified, remotely operated isolation valves to limit potential leakage from the sample lines. The automatic contain- ment isolation valves should close on containment Isolation signals' or safety injection signals. All remotely operated valves should have assured power supplies and control so that they can be reopened after an accident without clearing the isolation signal. Valves which are inaccessible during an accident should-be environmentally qualified to ensure operability under accident conditions. 9.3.2-5 Rev. 2 - July 1981 III. REVIEW PROCEDURES The reviewer will select and emphasize material from this SRP section, as may be appropriate for a particular case. 1. In the review of the process sampling system, CMEB compares the list of process sampling points contained in the SAR with the sampling points Identified in Subsection 11.1, above, to assure that the required process sampling points have been provided. 2. CMEB compares the capability of the system to obtain representative samples of process fluids and the locations of sampling points with the guidelines for obtaining representative samples of fluids contained in regulatory position C.6 of Regulatory Guide 1.21 (reference 1)