05000528/FIN-2013009-02
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Deficiencies in Emergency Diesel Generator Engine Room and Control Room Ventilation Air Flow Testing and Evaluation |
| Description | The team identified a Green, non-cited violation of 10 CFR Part 50, Appendix B, Criterion XI, Test Control, which states, in part, A test program shall be established to assure that all testing required to demonstrate that structures, systems, and components will perform satisfactorily in service is identified and performed in accordance with written test procedures which incorporate the requirements and acceptance limits contained in applicable design documents. Specifically, in June, 2013, the licensee failed to evaluate performance test results when high air flow measurements from the emergency diesel generator engine room and control room ventilation air flow performance tests contained values that were beyond the capability of the equipment. Consequently, the condition of the higher measured airflow had not been evaluated to determine if the test results were valid. In response to this issue, the licensee confirmed that the equipment had remained operable, based on the review of more accurate testing performed in 2006. This finding was entered into the licensees corrective action program as Palo Verde Action Request (PVAR) 4500070. The team determined that the failure to establish and incorporate adequate air flow acceptance criteria into the emergency diesel generator control room supply fan and engine room exhaust fan performance tests was a performance deficiency. This performance deficiency was more than minor because it adversely affected the Mitigating Systems Cornerstone attribute of Equipment Performance and affected the cornerstone objective to ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to incorporate adequate acceptance criteria into the safety-related equipment performance tests was a significant deficiency of test control which could cause unacceptable fan performance conditions to go undetected. In accordance with Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process (SDP) for Findings At-Power, dated June 19, 2012, Exhibit 2, Mitigating Systems Screening Questions, the issue screened as having very low safety significance (Green) because it was a design or qualification deficiency that did not represent a loss of operability or functionality; did not represent an actual loss of safety function of the system or train; did not result in the loss of one or more trains of nontechnical specification equipment; and did not screen as potentially risk-significant due to seismic, flooding, or severe weather. This finding had a cross-cutting aspect in the area of human performance because the licensee failed to use decision-making practices that emphasize prudent choices over those that are simply allowable. |
| Site: | Palo Verde  |
|---|---|
| Report | IR 05000528/2013009 Section 1R21 |
| Date counted | Mar 31, 2014 (2014Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | I Anchondo R Kopriva T Farnholtz W Sherbin B Jose C Hale C Osterholtz G Gardner |
| Violation of: | 10 CFR 50 Appendix B Criterion XI |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
| ' | |
Finding - Palo Verde - IR 05000528/2013009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Palo Verde) @ 2014Q1
Self-Identified List (Palo Verde)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||