Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | TS 3.3.7.1, Radiation Monitoring Instrumentation, requires one operable RECW radiation monitor channel at all times. With the radiation monitor inoperable, Table 3.3.7.1-1, Action 72 requires obtaining and analyzing RECW grab samples every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Contrary to TS 3.3.7.1, the RECW radiation monitor was inoperable from March 19, 2010, until April 22, 2010, and the required grab samples were not obtained. The cause of the inoperability was due to an incorrect method for calculating the monitor\'s Hi-Hi Alarm setpoint; the test incorrectly directed use of the background radiation level from the previous month\'s test. This issue was entered into Exelon\'s CAP as IR 1063446. The finding was determined to have very low safety significance (Green) in accordance with NRC IMC 0609, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, Containment Barrier, because the finding did not represent a degradation of a radiological barrier, a degradation of the barrier function of the control room against smoke or a toxic atmosphere, or an actual open pathway in the physical integrity of reactor containment, containment isolation system, or heat removal components. |
| Site: | Limerick  |
|---|---|
| Report | IR 05000352/2010004 Section 4OA7 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | E Dipaolo J Lilliendahl N Sieller J Bream P Krohn |
| INPO aspect | |
| ' | |
Finding - Limerick - IR 05000352/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Limerick) @ 2010Q3
Self-Identified List (Limerick)
| ||||||||||||||||||||||||||||||||||||||||||||||