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| Entered date | Event description | |
|---|---|---|
| ENS 54421 | 5 December 2019 10:41:00 | The following was received via email from Kansas State University Nuclear Reactor Facility: Per Technical Specification 4.7.3, fuel elements comprising approximately 1/3 of the core shall be visually inspected annually for corrosion and mechanical damage such that the entire core shall be inspected at a 3-year intervals. Due to an inspection tracking sheet sorting error, four fuel elements were not marked to be inspected and are currently outside of the required surveillance frequency. Failure to perform a surveillance within the required time interval shall result in the component being inoperable. The reactor is and will remain shutdown until review by the Reactor Safeguards Committee of corrective actions in accordance with the Technical Specifications. A written report will be submitted within ten days summarizing the reportable occurrence. |
| ENS 53805 | 23 December 2018 20:22:00 | The following was received via email: (The licensee notified) the NRC of a reportable occurrence identified on December 22, 2018 due to violation of an LCO (limiting condition for operation). While performing testing and surveillance following control rod maintenance, the Reactor Supervisor identified an interlock check was not being completed due to an inadequate procedure. The inadequacy was identified as part of additional documentation checks that are being implemented at the facility. Per Technical Specification 3.4.3 - Table 2, the CONTROL ROD (STANDARD) position interlock must be operable in PULSE MODE. The interlock prevents withdrawal of the standard control rods while in PULSE MODE. The surveillance to ensure the interlock is operable is required on a SEMIANNUAL frequency as specified in Technical Specifications 4.4.2. As currently written, the procedure used to satisfy this surveillance does not direct the operator to enter PULSE MODE to check the interlock. Instead, the procedure activated a similarly named interlock (Pulse Power) that indirectly prevents withdrawal of the standard control rods by engaging the source interlock; however it is not specified to enter PULSE MODE in the procedure steps. The CONTROL ROD (STANDARD) position interlock was subsequently tested to be operable in that it functioned properly during the test and no operational history would suggest it was non-functioning otherwise. Based on the surveillance not being performed in PULSE MODE, the interlock was technically not operable during pulsing operations. The reactor is and will remain shutdown until a review by the Reactor Safeguards Committee of corrective actions in accordance with Technical Specifications. A written report will be submitted within ten days summarizing the reportable occurrence. |