See response from Diablo Canyon below. From: [email protected] [mailto:[email protected]] On Behalf Of Langille, Elizabeth Ann Sent: Thursday, August 14, 2014 9:32 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 - Instrument Type Example Source Response Frequency Currently at Watts Bar Alpha Frisker Ludlum 12 w/ 43-92 probe Daily Weekly Area Radiation Monitor DRM-1 or RDS-31 Prior to use, Weekly, when in use Prior to use for the duration of the use Beta Gamma Frisker Ludlum 3 or Ludlum 177 Prior to use, Weekly, when in use Weekly Continuous Air Monitor AMS4 Prior to use, Weekly, when in use Weekly GM Dose Rate Meter Ludlum 14 or E530 Daily Weekly Micro R Meter Ludlum 19 N/A Weekly Neutron Detector (REM Ball) Ludlum 12-4 Prior to use, Weekly, when in use Weekly Portable Ion Chamber Ludlum 9-3 or RO20 Daily Weekly Telepole/Teletector Mirion Telepole Daily Daily multi use RadEye B20 Daily (2 points checked) 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 PG&E is committed to protecting our customers' privacy. To learn more, please visit http://www.pge.com/about/company/privacy/customer/
