05000275/FIN-2009002-01
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Finding | |
|---|---|
| Title | Failure to Follow Power Ascension Procedures |
| Description | The inspectors identified a noncited violation of Technical Specification 5.4.1, Procedures, after plant operators failed to stabilize reactor power and perform a comparison between the calorimetric heat balance calculation and the power range output prior to exceeding 30 percent power. The inspectors concluded several human performance factors contributed to the procedure violation, including less than adequate pre-job brief and poor operational command and control of the reactor power ascension. This finding is greater than minor because the failure to follow procedure is associated with the human performance attribute of the Mitigating Systems Cornerstone and affected the cornerstones objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors used Inspection Manual Chapter 0609, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, to analyze the significance of this finding. The inspectors concluded the finding is of low safety significance because the violation is not a design or qualification deficiency, did not represent a loss of a system safety function or risk significant equipment, and did not screen as potentially risk significant due to a seismic, flooding, or a severe weather initiating event. This finding has a crosscutting aspect in the area of human performance and the work practices component because the licensee failed to ensure adequate supervisory oversight of power ascension activities H.4(c) |
| Site: | Diablo Canyon  |
|---|---|
| Report | IR 05000275/2009002 Section 1R20 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | M Brown M Peck B Henderson D Stearns G George V Gaddy C Alldredge M Vasquez |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Diablo Canyon - IR 05000275/2009002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2009Q1
Self-Identified List (Diablo Canyon)
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