From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, April 13, 2012 8:58 AM To: [email protected] Cc: [email protected] Subject: Powernet: Detection of Reactor Coolant Leakage
Do you use Containment Atmosphere Radioactivity monitors for detection of Reactor Coolant Leakage? Yes If so, what level of leakage are you looking to detect with radiation monitors? The particulate channel setpoint is established to detect a 1 gpm leak within one hour. Also, in the event of high alarm or an increasing trend on this channel, station procedures direct operators to perform a water inventory balance within 1 hour in order to determine the equivalent RCS leak rate. The gas channel setpoint is established to detect a 0.5 gpm leak. This channel is not as sensitive for detecting RCS leakage as the particulate channel What monitors do you use (noble gas, particulate, iodine, area radiation)? noble gas, particulate What radionuclide mix do you assume in alarm setpoint determination (UFSAR mix, actual RCS, etc)? NRC Regulatory Guide 1.45 Michael J Gagnon, CHP Braidwood Nuclear Power Station Senior Health Physicist (815) 417-2733 Fax (815) 417-2410 ************************************************** This e-mail and any of its attachments may contain Exelon Corporation proprietary information, which is privileged, confidential, or subject to copyright belonging to the Exelon Corporation family of Companies. This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout. Thank You. ************************************************** --- NOTICE --- This message is for the designated recipient only and may contain confidential, privileged or proprietary information. If you have received it in error, please notify the sender immediately and delete the original and any copy or printout. Unintended recipients are prohibited from making any other use of this e-mail. Although we have taken reasonable precautions to ensure no viruses are present in this e-mail, we accept no liability for any loss or damage arising from the use of this e-mail or attachments, or for any delay or errors or omissions in the contents which result from e-mail transmission.
