Document: NUREG-0800
Document ID: 8536691d-4254-4c01-a5ec-aa9dee960958
Document Type: srp
Title: PROCESS AND EFFLUENT RADIOLOGICAL MONITORING INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740509.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
CFR Part: 
CFR Title: 

Content:
the P&IDs for the liquid and gaseous waste treatment systems, the reviewer verifies that specifically identified radioactive release points have provisions for automatic termination of releases in the event that they exceed a predetermined alarm level. The reviewer compares the provisions for 11.5-18 Revision 5 - May 2010 instrumentation with automatic termination of releases to the design guidance in Appendix 11.5-A. F. The reviewer evaluates the location of the radiation monitors, collocated sampling points, shown on the P&IDs, and the readouts, annunciators, and alarms discussed in SAR Chapter 7 to ensure that plant operators will be advised of system performance and instrumentation responses to effluent releases consistent with the release limits specified in the plant’s SREC, ODCM, and/or PCP. G. The reviewer compares the proposed calibration methods (i.e., electronic and via the use of the National Institute of Standards and Technology traceable radioactive standards) and frequency of calibrations with the guidelines in RGs 1.21, 1.33, and 4.15. The review of instrumentation calibrations considers whether instrumentation response is expected to change given that radionuclide distributions may vary with the operating status of the plant (i.e., normal operation, AOOs, and post-accident conditions). H. The reviewer confirms that adequate documentation exists to confirm the verification and validation of digital computer software used in radiation monitoring and sampling equipment, including software used to terminate or divert process and effluent streams. This evaluation includes software developed by the applicant, purchased through a vendor, or included with the instrumentation. I. The reviewer ensures that the design allows detectors to be replaced or decontaminated without opening the boundary of the process system or without losing the capability to isolate the system or divert effluents to tanks or standby treatment systems (as appropriate). J. The