05000331/FIN-2013005-03
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.3.6.1, Primary Containment Isolation Instrumentation, requires in part, that if any MSL tunnel temperature instrument channel was inoperable, the associated MSL must be isolate within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Contrary to the above, MSL tunnel temperature instrument TIS-4479 was inoperable between December 23 and December 28, 2012, and the associated C MSL was not isolated as required within the TS-allowed completion time of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Additionally, MSL tunnel instrument TIS-4480 was inoperable between May 5 and June 22, 2013, and the associated D MSL was not isolated as required within the TS-allowed completion time of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. The licensee determined that STP 3.0.0-01, Instrument Checks. did not have adequate guidance for qualitative channel checks of the instruments. This procedure inadequacy resulted in the MSL tunnel temperature instruments passing the quantitative acceptance criteria even though qualitatively the single channels indicated value had diverted from the other channels over time. The finding screened as very low safety significance (Green) because the finding did not represent an actual open pathway in the physical integrity of reactor containment, containment isolation system, and heat removal components. The licensee documented the conditions prohibited by TS for TIS-4479 and 4480 in CRs 01835557 and 01884408, respectively; replaced the MSL tunnel area TIS instruments, and revised STP 3.0.0-01 to contain qualitative instrument check guidance. |
| Site: | Duane Arnold  |
|---|---|
| Report | IR 05000331/2013005 Section 4OA7 |
| Date counted | Dec 31, 2013 (2013Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Patel C Phillips E Wong J Laughlin L Haeg M Yoder R Baker R Edwards R Elliott R Murray R Walton V Meyers |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - Duane Arnold - IR 05000331/2013005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Duane Arnold) @ 2013Q4
Self-Identified List (Duane Arnold)
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