NUREG-1537, Part 2 - NRC

CHAPTER 7
7.7 Radiation Monitoring Systems
Areas of Review
In this section of the SAR, the applicant should address all equipment, devices, and
systems used for monitoring or measuring radiation intensities or radioactivity,
except for nuclear instruments. Information in this section should be reviewed in
close coordination with those sections of Chapter 11, Radiation Protection
Program and Waste Management," that discuss the use of radiation-monitoring
systems to assess, evaluate, or control personnel or environmental radiological
exposures. Chapter 11 should include sufficient information about the radiationmonitoring
systems to support confident use of the exposure and dose results and
this section should detail the operating principles, designs, and functional
performance of the I&C aspects of the system. Radiation measurements at a
reactor facility may also be used for reactor diagnostic or safety purposes, and the
applicable equipment should be discussed in this section. Examples of such
finctions may include reactor coolant level, coolant radioactivity, fuel inventory
measurements for self-protection, confinement or containment initiation, and
experimental measurements.
The reviewer should evaluate radiation detectors and sampling equipment; signal
processing equipment; computer hardware and software that controls sampling,
detection, signal processing and logic; power supplies; and actuation systems that
accomplish a function for the system. In determining if the I&C systems are
designed to accomplish the radiation measurement functions, the reviewer should
evaluate the following:
* design bases, criteria, and guidelines used to design the system
* descriptive information including functional operation, instrument logic and
schematic diagrams
* analysis of the adequacy of the design to perform the stated function or
purpose of the systems and conformance to the design bases, criteria, and
guidelines used
* psroposed trip, annunciation, or alarm setpoints, time delays, accuracy
requirements, and actuated equipment response to verify that they are
consistent with applicable analyses and limiting conditions for operation in
the SAR
* coordination with review of other applicable SAR chapters to assess the
suitability of the monitored parameters for accomplishing the purposes
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