05000348/FIN-2009003-06
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR 50, Appendix B, Criterion III, Design Control, requires in part that measures shall be established to assure the design basis for those SSCs to which this appendix applies are correctly translated into procedures and instructions. Contrary to this on September 24, 2008, the licensee determined that surveillance test procedure FNP-0-STP-123.0, Control Room Emergency Ventilation Performance Test, contained an incorrect formula constant for the cross sectional area of the control room ventilation duct used to establish the required flow conditions for performance of the test. Specifically, the test procedure utilized a constant for the cross sectional duct area that was 0.42 square feet when actual cross sectional duct area was 0.39 square feet. This error resulted in the performance of a surveillance test documented in work order W00703732 where actual system flow rate was lower than that required for performance of the test. The licensee determined surveillance test procedures FNP-0-STP-123.3, CREFS Pressurization Unit Heater Performance Test and FNP-0-STP-916.0, CREFS Pressurization Unit Heater Operability Test, also referenced the incorrect duct cross sectional area and were similarly affected. This was identified in the licensees CAP as CR 2008109679. The licensee was able to demonstrate through subsequent analysis for those tests performed at lower than recorded system flow rates, sufficient margin remained to support system operability. This finding was assessed using Inspection Manual Chapter 0609 Significance Determination Process Phase 1 screening worksheet for mitigating systems cornerstone and determined to be of very low safety significance (GREEN) because it did not result in an actual loss of safety function of a single train for greater than the TS allowed outage time and was not potentially risk-significant due to external events |
| Site: | Farley  |
|---|---|
| Report | IR 05000348/2009003 Section 4OA7 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | G Kuzo C Rapp J Hickey S Sandal B Collins E Crowe S Shaeffer A Nielsen |
| INPO aspect | |
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Finding - Farley - IR 05000348/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Farley) @ 2009Q2
Self-Identified List (Farley)
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