05000416/FIN-2017012-02
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Finding | |
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| Title | Failure to Operate the Gaseous Radwaste System Within Design Specifications |
| Description | The inspectors identified a finding associated with the licensees failure to operate the gaseous radwaste system within design specifications. These deficiencies in design specifications were associated with the off gas charcoal adsorber and vault refrigeration components of the gaseous radwaste system, which has impacted the systems reliability and efficiency since at least 2007. The design parameters for offgas flow rate into the charcoal adsorbers and vault refrigeration temperature were 30 scfm and 0 degrees Fahrenheit, respectively. In contrast, the gaseous radwaste system is being operated with an approximate flow rate is 80 scfm and vault refrigeration temperature is 15 degrees Fahrenheit. The licensee has developed a system improvement plan to address resolution of these issues during the next scheduled outages. This performance deficiency was entered into the licensees corrective action program as Condition Report CR-GGN-2017-06875. 5 The failure to operate the offgas gaseous radwaste system within design specifications, resulting in elevated radiological effluent releases, is a performance deficiency. The finding is more than minor because it is associated with the plant equipment attribute of the Public Radiation Safety cornerstone and adversely affected the cornerstone objective to ensure adequate protection of public health and safety from exposure of radioactive materials released into the public domain as a result of routine civilian nuclear plant operation. Using Inspection Manual Chapter 0609, Appendix D, Public Radiation Safety Significance Determination Process, the finding was determined to be of very low safety significance (Green) because it involved the Effluent Release Program, it did not impair the ability to assess dose, and did not exceed the 10 CFR Part 50, Appendix I, or 10 CFR 20.1301(d) limits. The finding has a cross - cutting aspect in the area of problem identification and resolution, associated with the resolution component, because the licensee failed to take effective corrective actions in a timely manner to minimize the unreliability and inefficiency of the gaseous radwaste system [P.3]. |
| Site: | Grand Gulf  |
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| Report | IR 05000416/2017012 Section 2RS6 |
| Date counted | Sep 30, 2017 (2017Q3) |
| Type: | Finding: Green |
| cornerstone | Pr Safety |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71124.06 |
| Inspectors (proximate) | L Carson N Greene J O'Donnell T Go S Money H Gepford |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Grand Gulf - IR 05000416/2017012 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2017Q3
Self-Identified List (Grand Gulf)
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