Semantic search
| Entered date | Event description | |
|---|---|---|
| ENS 40314 | 11 November 2003 17:11:00 | On November 10, 2003, at 1740 hours it was determined that a Fitness-For-Duty program condition existed which required a 24-hour report to the NRC. Personnel with unescorted access are placed into different groups within the Fitness-For-Duty program. One of these groups, the Immune group, is for personnel not eligible for random test selection at our site, such as the NRC. The remaining groups become part of the random eligible population. During a review of the Fitness-For-Duty program it was discovered that the total number of personnel in the Immune population group was higher than normally expected (133 vs. 24). Some personnel required to be in the random eligible population were discovered to be in the Immune group, which rendered them ineligible for selection. (This primarily affected personnel transferring from an approved program within 30 days.). This resulted in non-compliance with 10 CFR 26.24. Security personnel are manually correcting the group listings, identifying the affected individuals, scheduling individuals still on site for testing, and notifying the plants where individuals potentially affected may have gone. A root cause investigation is presently being conducted to identify the extent, time frame, and cause of this event. If relevant information is uncovered as a part of the root cause investigation that affects the reportability determination, the NRC will be notified. This condition is being reported in accordance with 10CFR26.73. The licensee has notified the NRC Resident Inspector
Based on subsequent research, the licensee determined that the above event is not reportable as a significant event under 10 CFR 26.73. The licensee will notify the NRC Resident Inspector. Notified R2DO (Bonser) |
| ENS 40364 | 1 December 2003 14:37:00 | Failure of Master Relay K507 (MidTex Part Number 15614D200) in the Solid State Protection System (SSPS) was attributed to corrosion caused by off-gassing of chlorine contamination from paper used to wrap the relay coil, or the adhesive used to attach the paper wrap to the coil. Master Relays must change state, upon energization, to actuate various safety related equipment in the plant. The failure of Master Relay K507 is considered to be a manufacturing defect in a basic component that could cause a loss of safety function. The majority of MidTex relays investigated had cloth wrapped coils and these relays showed no evidence of corrosion. The number of affected relays and installed locations was not available at the time of the initial notification. The licensee will notify the NRC Resident Inspector. |
| ENS 40142 | 9 September 2003 16:28:00 | At 1530 EDT on September 8, 2003, maintenance personnel opened the 'A' train Control Room charcoal filter plenum (XAA-0029A-AH) to replace the charcoal. At 0730 EDT on September 9, 2003, a question was raised about the work being performed on the 'A' train Control Room ventilation Charcoal Filter Plenum. The Operating shift asked Engineering if the Control Room was capable of maintaining the Technical Specification required pressure under the current conditions, should the ventilation system go into the emergency mode of operation. Prior to getting the answer, the conservative decision was made to cease work on the charcoal filter plenum and restore the integrity of the 'A' train ventilation system. This was accomplished at 0805 EDT on September 9, 2003. At 0915 EDT on September 9, 2003, Engineering determined that with the isolation dampers for the 'A' train charcoal filter plenum open, due to the associated fan being tagged de-energized, the 'A' and 'B' trains of the control room ventilation system were effectively crossed. Breaching the charcoal filter plenum would have prevented the control room ventilation system from maintaining a greater than 1/8th inch positive pressure during the emergency mode of operation. Replacement of the charcoal has been placed on hold until a methodology can be formulated to allow the ventilation system to maintain the design pressure. The licensee informed the NRC resident inspector. |