See response from South Texas Project. Note we don't differentiate instruments for free release from any others. An instrument is either "in use", "available for use", or "in storage", and is documented as such in our instrument tracking application. Any instruments available for use or in use are response checked at frequencies below.
Matt Sumrall Sr. Health Physicist STP Nuclear Operating Co. [email protected]<mailto:[email protected]> (361) 972-4597 From: [email protected] [mailto:[email protected]] On Behalf Of Langille, Elizabeth Ann Sent: Thursday, August 14, 2014 11:32 AM To: '[email protected]' Cc: Tuck, Mahlon O; Rolph, James Thomas Jr; Cole, Tony Allen Subject: Powernet: Benchmark question on instrument source response frequency Benchmark Question Watts Bar is evaluating the appropriateness of our instrument response check frequency. We have listed our current response check frequencies below for instruments not used to perform unconditional release surveys. Instruments that we used to perform unconditional releases are distinctly marked and designated for this purpose and source checked daily. What is your response check frequency for the following instruments? (Excluding instruments used as scalers or instruments used for unconditional releases.) Name of Responding Plant/Utility - South Texas Project Instrument Type Example Source Response Frequency Currently at Watts Bar Alpha Frisker Ludlum 12 w/ 43-92 probe Daily, or prior to use when used less frequently than daily. Weekly Area Radiation Monitor DRM-1 or RDS-31 Prior to use and weekly while in use; however, RP supervision may approve no additional checks for the duration of use (which is common). Prior to use for the duration of the use Beta Gamma Frisker Ludlum 3 or Ludlum 177 Daily, or prior to use when used less frequently than daily. Weekly Continuous Air Monitor AMS4 Prior to use and weekly while in use. Weekly GM Dose Rate Meter Ludlum 14 or E530 Daily, or prior to use when used less frequently than daily. Weekly Micro R Meter Ludlum 19 Daily, or prior to use when used less frequently than daily. Weekly Neutron Detector (REM Ball) Ludlum 12-4 Daily, or prior to use when used less frequently than daily. Weekly Portable Ion Chamber Ludlum 9-3 or RO20 Daily, or prior to use when used less frequently than daily. Weekly Telepole/Teletector Mirion Telepole Daily, or prior to use when used less frequently than daily. Daily multi use RadEye B20 Daily, or prior to use when used less frequently than daily. Daily (at one reading point only) Mahlon Tuck Superintendent, RP Technical Support Watts Bar Nuclear Plant MOB 2U WBN PO Box 2000 Spring City, TN 37381 423/593-9487
