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 - Instrument Type Example Source Response Frequency Currently at Watts Bar Alpha Frisker Ludlum 12 w/ 43-92 probe Weekly Area Radiation Monitor DRM-1 or RDS-31 Prior to use for the duration of the use Beta Gamma Frisker Ludlum 3 or Ludlum 177 Weekly Continuous Air Monitor AMS4 Weekly GM Dose Rate Meter Ludlum 14 or E530 Weekly Micro R Meter Ludlum 19 Weekly Neutron Detector (REM Ball) Ludlum 12-4 Weekly Portable Ion Chamber Ludlum 9-3 or RO20 Weekly Telepole/Teletector Mirion Telepole Daily multi use RadEye B20 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
