05000454/FIN-2016002-04
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Specification 5.4.1.c requires that written procedures shall be established, implemented, and maintained covering the Fire Protection Program implementation. Step 4.2.9 of OPMW201007, Fire Protection System Impairment and Control, stated, Compensatory measures for inoperable fire protection SSCs shall be established in accordance with site specific TRM (or equivalent document) and impairment procedures. TRM LCO 3.10.g requires implementation of an hourly fire watch or establishment of alternate compensatory measures. Contrary to the above, an hourly fire watch was not established for the lower cable spreading room on March 11, 2016, when the fire suppression system was removed from service and the requirements of the alternate compensatory measure were no longer satisfied. Specifically, the alternate compensatory measure required the suppression and detection systems to be available and when the requirements were no longer satisfied, the hourly fire watch should have been re-established. The condition existed for approximately 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> and fire detection remained operable during the entire period. The licensee entered this issue into their CAP as IR 2639686. The performance deficiency was determined to be more than minor because it adversely impacted the Mitigating Systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences due to external events such as fire. Specifically, the failure to implement the analyzed compensatory measures reduced the reliability of the systems required for safe shutdown. The inspectors screened the finding using IMC 0609, Significance Determination Process, Attachment 04, Initial Characterization of Findings, Appendix A, The Significance Determination Process (SDP) for Findings at Power, Exhibit 2, Mitigating Systems Screening Questions. The Part B and D.1 questions were answered No, but question D.2 was answered Yes. Since the detection system remained operable during the entire period, one of the D.2.a conditions was satisfied and the condition represented a finding of very low safety significance (Green). The issue was also reviewed using IMC 0609 Appendix F resulting in a delta CDF of 4.4E7/year which also screened as having very low safety significance (Green). |
| Site: | Byron  |
|---|---|
| Report | IR 05000454/2016002 Section 4OA7 |
| Date counted | Jun 30, 2016 (2016Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Hunt C Thompson E Duncan G Edwards J Draper J Mcghee L Smith M Holmberg S Bell |
| Violation of: | Technical Specification |
| INPO aspect | |
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Finding - Byron - IR 05000454/2016002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2016Q2
Self-Identified List (Byron)
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