05000249/FIN-2014005-03
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Finding | |
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| Title | Failure to Maintain Configuration Control in the Unit 3 Containment Pressure Suppression System |
| Description | A finding of very low safety significance and associated non-cited violation of Technical Specification (TS) 5.4.1, Procedures, was self-revealed on November 19, 2014, for the licensees failure to maintain configuration control in the Unit 3 containment pressure suppression system. Specifically, the licensee failed to maintain the instrument air stop valve to the actuator for Unit 3 torus vent 3160160 open with the reactor in the Start-up and Run Mode following refueling outage D3R23. The inspectors determined that the licensees failure to maintain configuration control of the Unit 3 containment pressure suppression system was contrary to procedures for the emergency depressurization of containment as well maintaining TS required atmospheric conditions inside the primary containment with the reactor in Mode 1 and was a performance deficiency. The inspectors determined that the finding was more than minor because it was associated with the barrier integrity cornerstone attribute of configuration control in how containment design parameters are maintained while affecting the cornerstone objective of providing reasonable assurance that physical design barriers protect the public from radionuclide releases caused by accidents or events. The inspectors determined that the finding was of very low safety significance based on answering No to all of the Barrier Integrity screening questions in IMC 0609, Appendix A, The Significance Determination Process for Findings At-Power, Exhibit 3. The finding has a cross-cutting aspect of conservative bias in the area of Human Performance because the licensee did not implement appropriate robust barriers to prevent bumping of the 3160160SV in response to corrective action 51187802. Specifically, the licensee previously evaluated 3160160SV and non-conservatively determined that this particular valve did not require a seal to prevent inadvertent operation. |
| Site: | Dresden  |
|---|---|
| Report | IR 05000249/2014005 Section 1R20 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | A Shaikh B Bartlett C Khan D Lords E Sanchez-Santiago G Roach J Cameron J Mancuso M Porfirio R Jicklin T Go |
| Violation of: | Technical Specification - Procedures Technical Specification |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Dresden - IR 05000249/2014005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Dresden) @ 2014Q4
Self-Identified List (Dresden)
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