05000361/FIN-2011003-05
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Finding | |
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Title | Failure to Follow Procedure Requirements for a Failed Surveillance |
Description | The inspectors identified a noncited violation of Technical Specification 5.5.1.1, Procedures, for the failure of operations personnel to follow the surveillance program requirements for control element assembly testing, when a satisfactory verification of control element assembly movement was not obtained. Specifically, on May 8, 2011, operations personnel failed to refer to the abnormal procedure and the applicable action statement for Technical Specification 3.1.5, Control Element Assembly (CEA) Alignment, as required by Procedure SO23-3-3.5, CEA/Reactor Trip Circuit Breaker Operability Testing, Revision 18, when a satisfactory verification of control element assembly movement was not obtained. The licensee assumed the inability to move a control element assembly was due to a control rod drive mechanism control system failure without establishing a technical basis. This issue was entered into the licensees corrective action program as Nuclear Notification NN 201474804. The performance deficiency is more than minor and therefore a finding, because, if left uncorrected, it would have the potential to lead to a more significant safety concern since using presumptions of operability with inadequate factual basis could result in a condition prohibited by technical specifications. The finding is associated with the Mitigating Systems Cornerstone. Using the Manual Chapter 0609, Significance Determination Process, Phase 1 Worksheets, the finding was determined to have very low safety significance because the finding: (1) was not a design or qualification issue confirmed not to result in a loss of operability or functionality; (2) did not represent an actual loss of safety function of the system or train; (3) did not result in the loss of one or more trains of nontechnical specification equipment; and (4) did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The finding has a cross-cutting aspect in the area of human performance associated with the decision-making component because operations personnel failed to use conservative assumptions in decision-making when evaluating test results to determine an appropriate course of action. |
Site: | San Onofre ![]() |
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Report | IR 05000361/2011003 Section 1R22 |
Date counted | Jun 30, 2011 (2011Q2) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.22 |
Inspectors (proximate) | C Alldredge C Osterholtz E Uribe G Guerra G Warnick J Reynoso J Tapp J Watkins N Greene P Elkmann R Lantz S Achen S Hedger Z Hollcraft |
CCA | H.14, Conservative Bias |
INPO aspect | DM.2 |
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Finding - San Onofre - IR 05000361/2011003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (San Onofre) @ 2011Q2
Self-Identified List (San Onofre)
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