Perry Nuclear Power would like to know how other plants arrange their exit 
beta/alpha sensitive (e.g. PCM or equivalent) and gamma sensitive (i.e. 
SPM or equivalent) monitors at the RCA exit.

Which configuration describes your plant

1 - beta/alpha monitor followed by gamma monitor.  RCA exit boundary is 
after the gamma monitor

2 - gamma monitor followed by beta/alpha monitor.  RCA exit boundary is 
after the beta/alpha monitor

3 - beta/alpha monitor, RCA exit boundary, then gamma monitor

4 - gamma monitor, RCA exit boundary, then beta/alpha monitor

5 - Other configuration.  Explain.


Thank you in advance for your reply.


Sun G. Lee, CHP
Perry Nuclear Power Plant
Radiation Protection
440-280-5039 work
440-465-8030 cell
email: [email protected]


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