05000306/FIN-2010009-02
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Finding | |
|---|---|
| Title | Classification of CC Piping |
| Description | The Inspectors identified an unresolved item regarding the licensees classification of portions of the component cooling system as nonsafety-related. During the inspection, insufficient information was available to determine the correct classification of portions of the CC piping; therefore the inspectors could not determine if the licensee properly applied the 50.59 process to review procedure changes related to isolation of the CC system
During performance of the inspection, the inspectors reviewed the procedural changes, operability recommendations and 50.59 screen associated with actions to isolate portions of the Unit 1 CC system during adverse weather to prevent challenging the safety function of the CC system due to impacts from tornado born missiles. The licensee concluded that a 50.59 evaluation would not be required, in part, because the change did not represent an adverse affect on system design functions. When the inspectors questioned the veracity of that conclusion, the licensee provided additional information that the portions of the CC system that would be isolated had been downgraded from safety related to nonsafety-related in the 1990s. This change eliminated some quality requirements including the need for missile protection. The inspectors reviewed the documentation provided by the licensee but could not determine if changes made to the classification of the CC operation were consistent with regulatory requirements. In addition, the current designation of portions of the CC piping as nonsafety-related does not appear consistent with Licensee Procedure FP-E-RTC-02, Equipment Classification. Pending review of additional documentation to determine the correct classification of the CC piping, this issue will remain an Unresolved Item (URI) and tracked as URI 05000282/2010009-02; Classification of CC Piping. |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000306/2010009 Section 4OA4 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 95001 |
| Inspectors (proximate) | J Ellegood D Betancourt S Westc Thomasj Giessner |
| INPO aspect | |
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Finding - Prairie Island - IR 05000306/2010009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Prairie Island) @ 2010Q3
Self-Identified List (Prairie Island)
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