05000263/FIN-2017004-01
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Finding | |
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| Title | Failure to Maintain Radiation Exposure ALARA |
| Description | A finding of very low safety significance (Green) was self-revealed due to the licensee having unplanned and unintended occupational collective radiation dose because of deficiencies in the licensees radiological work planning and work control program. Specifically, the licensee failed to properly incorporate ALARA strategies, insights while planning, and executing work activities during the 1R28 refueling outage. The Reactor Water Cleanup (RWCU) Inlet Outboard Isolation Valve MO2398 was scheduled for replacement during the outage. The initial dose estimate for this activity was 4.5 person-rem. However, 13.776 actual person-rem of dose was received. This issue was caused by poor radiological planning and work execution of this task. The licensee entered this issue into their Corrective Action Program (CAP) item 1558234. The finding was more than minor because it was associated with the program and process attribute of the Occupation Radiation Safety Cornerstone. Additionally, this issue affected the cornerstone objective of ensuring the adequate protection of the workers health and safety from exposure to radiation from radioactive material during routine civilian nuclear reactor operation. Additionally, the finding is very similar to IMC 0612, Appendix E, Examples of Minor Issues, dated August 11, 2009, Example 6.i. This example provides guidance that an issue is not minor if the actual collective dose exceeded 5 person-rem and exceeded the planned, intended dose by more than 50 percent. The inspectors determined that this finding was of very low safety significance (Green) because Monticello Nuclear Generating Plants current 3year rolling average collective is 64.637 person-rem (20142016). This is less than the 240 person-rem/unit referenced within IMC 0609, Appendix C, Occupational Radiation Safety Significance Determination Process, dated August 19, 2008. This finding had a cross-cutting aspect in the area of Human Performance, related to the cross-cutting aspect of Work Management, in that the outage plan did not adequately plan, control and execute work activities to ensure the RWCU Inlet Outboard Isolation Valve MO2398 replacement remained ALARA. [H.5] |
| Site: | Monticello  |
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| Report | IR 05000263/2017004 Section 2RS2 |
| Date counted | Dec 31, 2017 (2017Q4) |
| Type: | Finding: Green |
| cornerstone | Or Safety |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71124.02 |
| Inspectors (proximate) | P Zurawski T Ospino K Pusateri S Bell R Baker M Bielby G Hansen A Shaikh |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Monticello - IR 05000263/2017004 | |||||||||||||||||||||||||||||||||||||||||
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Finding List (Monticello) @ 2017Q4
Self-Identified List (Monticello)
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