05000220/FIN-2009010-01
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Finding | |
|---|---|
| Title | Failure to Properly Scope the SPDS Function of the Plant Process Computer Into the Maintenance Rule |
| Description | The inspectors identified a Green NCV of 10 CFR 50.65 b(2) for failure to properly scope the Safety Parameter Display System (SPDS) function of the Unit 1 Plant Process Computer into the Maintenance Rule. As a result, a required Structure, System, and Component (SSC) was not placed in a maintenance rule a(1) status based upon unreliable system performance as required by 10 CFR 50.65. The licensee entered this issue into their corrective action program. The SPDS function of the Unit 1 Plant Process Computer not properly being scoped into the Maintenance Rule program is considered to be a performance deficiency that was reasonably within Constellations ability to foresee and prevent. This issue is similar to a more than minor example, 7d, of IMC 0612, Appendix E, Examples of Minor Issues. Specifically, had this issue been properly scoped into the Maintenance Rule, system performance would require that it would be placed in an a(1) status. Additionally, the finding was more than minor because it impacts the equipment performance attribute of the Mitigating Systems cornerstone and the corresponding cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). The inspectors assessed this finding in accordance with IMC 0609 Attachment 4, Phase 1 Initial Screening and Characterization of Findings. The issue screens to very low safety significance (Green) because it did not result in the loss of a safety function, it did not result in outage time for one or more trains of a SSC to exceed its allowed Technical Specification (TS) outage times, and it is not potentially risk significant due to a seismic, flooding, or severe weather initiating event. The inspectors did not assign a cross-cutting issue to this finding because this was not considered to be indicative of current performance as the Maintenance Rule scoping determinations were legacy decisions. |
| Site: | Nine Mile Point  |
|---|---|
| Report | IR 05000220/2009010 Section 4OA2 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Rosebrook D Dempsey M Patel N Lafferty R Powell |
| INPO aspect | |
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Finding - Nine Mile Point - IR 05000220/2009010 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Nine Mile Point) @ 2009Q4
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