05000341/FIN-2008005-03
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Inadequate Degraded Voltage Protection Scheme |
| Description | As documented in Inspection Report 05000341/2008008, the inspectors identified a concern with respect to the adequacy of the degraded voltage protection scheme. In correspondence dated June 11, 1981, the licensee described the time delay settings for the degraded voltage relays; however, they did not discuss the impact of receiving a safety injection signal during degraded voltage conditions. At that time, the NRC did not identify this oversight, and had subsequently determined the degraded voltage scheme was acceptable. As documented in Inspection Report 05000341/2008008, the inspectors determined that the current degraded voltage protection scheme is inadequate in that the time delay relay settings for the degraded voltage relays for both divisions could impact the emergency core cooling system injection timing requirements. Additionally, for a short period of time under degraded voltage conditions, voltage could be too low for proper operation of safety-related motors but high enough to prevent EDG start. After further review, the inspectors determined that the provisions of 10 CFR 50.109(a)(4), were applicable and that a modification was necessary to bring a facility into compliance with the rules or orders of the NRC. The licensee was requested to respond with a description of the intended actions to address the noncompliance including a proposed schedule to complete those actions. In a letter dated August 4, 2008, from J. Plona (ADAMS Accession No. ML0822502561), the licensee stated the installation of the modification which will bring the plant into full compliance with General Design Criteria 17 will be completed by the end of the fourteenth refueling outage in 2010. As stated in Inspection Report 05000341/2008008, this issue was not dispositioned as a violation because the NRC had accepted the inadequate degraded voltage protection scheme in 1981 and in 1985. However to ensure actions are completed to correct the condition, this issue is considered open pending completion of the licensees modification. (VIO 05000341/2008005-03 |
| Site: | Fermi  |
|---|---|
| Report | IR 05000341/2008005 Section 4OA5 |
| Date counted | Dec 31, 2008 (2008Q4) |
| Type: | Violation: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Jickling R Winter T Steadham J Rutkowski M Bielby R Morris A Wilson M Jones |
| INPO aspect | |
| ' | |
Finding - Fermi - IR 05000341/2008005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Fermi) @ 2008Q4
Self-Identified List (Fermi)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||