05000254/FIN-2015004-01
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Finding | |
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| Title | EAL Threshold Values Were Not Revised |
| Description | An Unresolved Item (URI) was identified because additional information is required to determine whether a performance deficiency that is more than minor exists, and if a violation of 10 CFR 50.54(q)(2), which requires a licensee to develop and maintain an emergency plan that meets the requirements of 10 CFR 50.47(b), and 10 CFR Part 50, Appendix E, had occurred. The licensee identified an issue of concern when the Quad Cities General Abnormal procedures (QGAs) were revised with a new value for Minimum Steam Cooling Reactor Pressure Vessel Water Level (MSCRWL) but the associated EALs that use the MSCRWL value as an EAL threshold were not revised. On March 12, 2015, the QGAs were revised with a new value for MSCRWL. However, the site EALs that should use the revised QGA value as an EAL threshold value were not revised. The licensee scheduled the revisions of the QGAs to support implementation of changes that were associated with the diverse and flexible coping strategies (FLEX) implementation and the sites transition to new Optima2 fuel. Both of the changes were scheduled to be implemented in March 2015 during the Quad Cities Unit 1 Refueling Outage as part of a revision package. Because of the new fuel, the MSCRWL value changed from -166 inches to -190 inches. On April 28, 2015, the licensee identified the EALs were not changed to correspond with the new MSCRWL values incorporated in the QGAs. The specific EALs that are affected are MG2 and FG1, which are used to determine if a General Emergency should be declared based on the MSCRWL value. Since the value remained at -166 inches, the licensee concluded that the issue could have potentially caused, under certain conditions, the site to declare a General Emergency earlier than needed and issue an unnecessary Protective Action Recommendation (PAR) to the public. Following identification of the issue, the licensee implemented the appropriate changes to EALs MG2 and FG1 on April 30, 2015. Since there was a discrepancy between the QGAs and the EAL threshold values that could have affected the timely and accurate classification of a General Emergency, a potential performance deficiency exists. However, in order to determine if the performance deficiency is more than minor significance, additional information is needed. The URI was identified pending additional information and inspection follow-up. Specifically, additional information is required to: understand if the discrepancy in the MSCRWL values documented in the QGAs and the EALs would have led to an overclassification of a General Emergency and issuance of an unnecessary PAR; understand if there are events that could be postulated where the -166 inches could be exceeded without reaching the -190 inches; and understand the timeline from when the fuel was transitioned to Optima2 until the discovery of this issue. This information will assist the inspectors to determine if the performance deficiency is more than minor and if a violation of 10 CFR 50.54(q)(2) occurred. |
| Site: | Quad Cities  |
|---|---|
| Report | IR 05000254/2015004 Section 1EP4 |
| Date counted | Dec 31, 2015 (2015Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71114.04 |
| Inspectors (proximate) | C Mathews C Norton G Hausman I Khan K Carrington K Stoedter M Garza M Holmberg M Jeffers R Murrayb Palagic Mathews K Carrington K Stoedter M Garza M Jeffers N Valos R Baker R Murray R Ng |
| INPO aspect | |
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Finding - Quad Cities - IR 05000254/2015004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2015Q4
Self-Identified List (Quad Cities)
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