05000237/FIN-2006012-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Inappropriate Basis in 10 CFR 50.59 Evaluation for Temporary Modification |
| Description | The inspectors identified a Severity Level IV NCV of 10 CFR 50.59 for the licensees failure to perform an adequate safety evaluation review for changes made to the facility per Temporary Modification EC TCCP 354622. Specifically, the licensee failed to appropriately evaluate the installation of a temporary jumper at Electro-Hydraulic Control EHC Card 2-5640-A37 to bypass the function of A Main Steam Pressure Regulator MSPR. The licensees 10 CFR 50.59 safety evaluation 2005-01-001 failed to provide a basis as to why the activity to bypass one of the two MSPRs did not present more than minimal increase in the likelihood of occurrence of a malfunction of a Structures, Systems, and Components SSC important to safety previously evaluated in the Updated Final Safety Analysis Report UFSAR. Because the issue potentially impacted the NRCs ability to perform its regulatory function, this finding was evaluated using the traditional enforcement process. The finding was determined to be more than minor because the inspectors could not reasonably determine that the activity implemented per Temporary Modification EC TCCP 354622, which adversely affected systems important to safety, would not have ultimately required NRC approval. The inspectors completed a significance determination of the underlying technical issue using NRCs inspection manual chapter IMC 0609, Appendix A, Significance Determination of Reactor Inspection Findings for At-Power Situations, and answered no to the Transient Initiator screening question in the Phase 1 Screening Worksheet. Specifically, the MSPR system does not have a mitigating function. This issue was entered into the licensees corrective action program. |
| Site: | Dresden  |
|---|---|
| Report | IR 05000237/2006012 Section 1R02 |
| Date counted | Dec 31, 2006 (2006Q4) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.02 |
| Inspectors (proximate) | A Dahbur C Acosta J Jacobson |
| INPO aspect | |
| ' | |
Finding - Dresden - IR 05000237/2006012 | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Dresden) @ 2006Q4
| |||||||||||||||||||||||||