05000254/FIN-2011004-05
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Transition from Emergency Operating Procedure to Appendix R Safe Shutdown Procedure-Time Zero Issue |
| Description | In 1998, the NRC was concerned that there was no clear guidance for when to transition from EOP to Appendix R Safe Shutdown Procedure, QCARP. In the timeframe between 1998 and 2000, there was significant discussion between the licensee and the NRC on the subject of time zero. In 1998, the NRC opened an inspector followup item (IFI) in Inspection Report 98-017 dated November 5, 1998. The IFI pertained specifically to establishing conditions for QCARP entry since premature entry could jeopardize a response to design basis events, while delayed entry could jeopardize the ability to safely shutdown in the event of an Appendix R fire. During this inspection, the inspectors discussed the transition from EOP to QCARP with the licensee operations personnel. Based on this discussion, the inspectors ascertained that the determination to make such a transition would be based on reports of the impact of the fire and ability to control the plant using the EOPs. The inspectors noted that Procedure QCOA 0010-12, Fire/Explosion, provided Operations personnel with information on what the protected and analyzed safe shutdown equipment was and what equipment could be potentially affected by fire for any given area. Such equipment was already specified as an option for use by the EOP. Based upon this information, the inspectors concluded that this inspection followup item could be closed out. A review of the Safe Shutdown Procedure QCARP, Revision 8, indicated that the entry into this procedure from EOP was based on symptom of severe and uncontrolled fire which reflected the operations philosophy as indicated earlier. This procedure was acceptable to the NRC only as a means of taking timely actions, within 10 minutes, to preclude multiple spurious actions. However, from the standpoint of the time frame of transition from EOP to QCARP, this procedure was still questionable. In this connection, the inspectors opined that from the inception of fire until entry into QCARP, it could be any length of time and any number of spurious operations before the transition takes place. The inspectors concluded that the time of this transition was undefined, and therefore, the inspectors were not sure whether this procedure was really acceptable. In view of this concern, and the prior closure by the NRC of a similar issue, the inspectors determined that the issue of transition time frame (t=0) from EOP to QCARP needs to be re-evaluated and addressed. As result of this assessment, the inspectors are opening a new URI 05000254/2011004-05; 05000265/2011004-05 to address this issue |
| Site: | Quad Cities  |
|---|---|
| Report | IR 05000254/2011004 Section 4OA5 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Dahbur A Shaikh B Jose I Hafeez I Khan R Daleym Munira Dahbur M Mitchell M Phalen M Ring J Mcghee B Cushman R Edwards C Mathews L Rodriguez |
| INPO aspect | |
| ' | |
Finding - Quad Cities - IR 05000254/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Quad Cities) @ 2011Q3
Self-Identified List (Quad Cities)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||