05000313/FIN-2013011-07: Difference between revisions
Jump to navigation
Jump to search
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
| Line 12: | Line 12: | ||
| identified by = NRC | | identified by = NRC | ||
| Inspection procedure = IP 93800 | | Inspection procedure = IP 93800 | ||
| Inspector = A Sanchez, D Allen, D Loveless, G Miller, J Watkins, S Jonesb, | | Inspector = A Sanchez, D Allen, D Loveless, G Miller, J Watkins, S Jonesb, Lattag Werner, J Melfi, L Willoughby, N Okonkwo | ||
| CCA = N/A for ROP | | CCA = N/A for ROP | ||
| INPO aspect = | | INPO aspect = | ||
| description = At approximately 9:23 a.m. on March 31, 2013, Unit 2 experienced a startup transformer 3 lockout due to an electrical fault inside the breaker cabinet for startup transformer 3 to bus 2A1 supply breaker 2A-113. Initial reports to the control room indicated that the door of the feeder breaker appeared to be blown open, and light smoke was observed in the area. This information was documented in the control room logs at 9:25 a.m. Through interviews with responding operators, the team determined that this information was separately reported to the control room multiple times and by different methods. At some time later, another operator looked into the panel and identified damage to the bus bars inside the breaker cabinet. Although not documented in the control room logs, this information was reported to the control room at approximately 10:20 a.m. Operators subsequently declared a Notification of Unusual Event based on a small explosion inside the protected area (HU4) at 10:33 a.m. The team determined that multiple reports had been made to the control room, but the information appeared to be substantially the same as the initial report received at 9:25 a.m. The 9:25 a.m. report was also the only report documented in the control room logs. The team concluded that additional follow-up inspection was required to assess the timeliness of the emergency classification given the information available to the control room operators: Unresolved Item URI 05000368/2013011-07, Timeliness of Emergency Action Level Determination. | | description = At approximately 9:23 a.m. on March 31, 2013, Unit 2 experienced a startup transformer 3 lockout due to an electrical fault inside the breaker cabinet for startup transformer 3 to bus 2A1 supply breaker 2A-113. Initial reports to the control room indicated that the door of the feeder breaker appeared to be blown open, and light smoke was observed in the area. This information was documented in the control room logs at 9:25 a.m. Through interviews with responding operators, the team determined that this information was separately reported to the control room multiple times and by different methods. At some time later, another operator looked into the panel and identified damage to the bus bars inside the breaker cabinet. Although not documented in the control room logs, this information was reported to the control room at approximately 10:20 a.m. Operators subsequently declared a Notification of Unusual Event based on a small explosion inside the protected area (HU4) at 10:33 a.m. The team determined that multiple reports had been made to the control room, but the information appeared to be substantially the same as the initial report received at 9:25 a.m. The 9:25 a.m. report was also the only report documented in the control room logs. The team concluded that additional follow-up inspection was required to assess the timeliness of the emergency classification given the information available to the control room operators: Unresolved Item URI 05000368/2013011-07, Timeliness of Emergency Action Level Determination. | ||
}} | }} | ||
Latest revision as of 19:50, 20 February 2018
| Site: | Arkansas Nuclear  |
|---|---|
| Report | IR 05000313/2013011 Section 4OA5 |
| Date counted | Jun 30, 2013 (2013Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 93800 |
| Inspectors (proximate) | A Sanchez D Allen D Loveless G Miller J Watkins S Jonesb Lattag Werner J Melfi L Willoughby N Okonkwo |
| INPO aspect | |
| ' | |