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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 53845 | 24 January 2019 12:00:00 | 10 CFR 30.50(b)(2) | Gauge Not Operating Due to Power Loss to Unit | The following was received via e-mail: (The Nucor Steel) Electrician received a call this morning at approximately 0700 EST by the slitter line operator notifying him that the slitter line gauge was not operating and had no power to the entire unit. The electrician did a survey to ensure the shutter was closed on the device. He measured 12 microR/hr on contact, at 1 foot and at 3 feet. At that time he trouble shot the electrical and determined that it was something that was not going to be resolved quickly so he locked out the device and did another survey to confirm that the shutter was closed. He used a Fluke 451 meter serial# 2194 Calibration date 5/30/2018. (The Nucor Engineer) went over this afternoon to confirm the survey with another meter and got 18 microR/hr on contact, 8 microR/hr at 1 foot with a background of 5 microR/hr, (using) a fluke 451P serial #6064 meter with calibration date 5/30/2018. (Nucor) maintenance personnel are planning on continuing to troubleshoot the electrical issue and determine whether they can fix it or they will need to call in an outside vendor tomorrow. Only electrical work on power to the system will be performed by Nucor personnel. (The Nucor) radioactive materials registration is XF7000385, expires 12/9/19. The gauge is a DMC AM-5A Serial# BS957911 with a Am-241 source 1 Curie activity Serial# 5135LV. No personnel radiation exposure occurred due to this event. No additional notifications were performed by the licensee. |