At one time or another, we’ve had most of the problems listed. The biggest fix was switching to the LDM-250. That prevented the folks from taking the dosimeter in the middle of writing to the dosimeter. Far fewer issues since doing that. Failing the LDM-250, coach folks to take their hands off the dosimeter until HIS-20 displays the screen that indicates it is done with the access transaction (there is a small window of opportunity between when the access transaction is written to the database and the signal is sent to the dosimeter to turn it on).
Some OE from a previous life: look for any RF interference in the area anywhere near the LDM to DMC-2000S radio frequency. It is very low power and all too easy to mess with. Proximity to a CRT monitor is enough. In one case we wound up putting the readers in a small Faraday cage because the interfering RF was really powerful and could not be removed. Easy to test this with an electrically grounded metal box. David Brehm Sr. Radiological Engineer Radiation Protection – Fort Calhoun Station Omaha Public Power District 9610 Power Lane, Blair, NE 68008 Office: 402.533.6045 Cellular: 402.237.9840 dmbr...@oppd.com<mailto:dmbr...@oppd.com> From: BJ Thompson [mailto:bj.thomp...@dominionenergy.com] Sent: Monday, March 12, 2018 11:55 AM To: powernet@HPSpowernet.org Cc: Tom Pastor <tom.pas...@dominionenergy.com> Subject: [powernet] DMC-2000 Question Phishing = #1 threat to OPPD Is this a phishing email? - Look again! This email is from powernet-return-919-dmbrehm=oppd....@hpspowernet.org<mailto:powernet-return-919-dmbrehm=oppd....@hpspowernet.org> - do you know them? Use the "Report it" button if you think this is a phishing email. ________________________________ North Anna has a question for plants that use Canberra’s HIS-20 software and DMC-2000 electronic dosimeters. 1. Have you had any occurrence where the DMC-2000 has been found in PAUSE after being issued in HIS-20? 2. Have you had any occurrence where the DMC-2000 once issued has turned back to PAUSE without interfacing with a dosimeter reader? 3. Have you had any occurrence with the DMC-2000 losing contact with the wireless reader during the issuance or return process? 4. Have you had any occurrence during the issue process, the system issues then quickly returns the dosimeter? 5. If you have answered “yes” to any of these questions – what corrective measures have you put in place to prevent these events? Barbara J. Thompson North Anna Power Station 1022 Haley Drive Mineral, Va 23117 Superintendent Health Physics Technical Services bj.thomp...@dominionenergy.com<mailto:bj.thomp...@dominionenergy.com> Phone: 540-894-2638 ________________________________ CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.