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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 53983 | 4 April 2019 19:50:00 | Non | Non Power Reactor - Reactor Not Properly Secured | On 4/4/19 at approximately 1250 PDT, it was discovered that the Nuclear Test Reactor (NTR) facility control room console had not been properly secured at the Vallecitos Nuclear Center (VNC) in accordance with license technical specifications and internal procedures. The console key remained in the console and no licensed operator was present. The reactor is considered secured when the console key lock switch is off and the console key is in proper custody. The reactor was shut down at the time and the key lock was in the off position. The licensed operator exited and locked the control room at 1250 PDT but left the console key at the console failing to secure it in the designated storage safe as required. No personnel entered the control room until 1345 PDT when an authorized Radiation Monitoring Technician entered, discovered the key and immediately notified a licensed operator. Additional actions are being evaluated as a part of the corrective action program. No unsafe condition existed, however, the event is being reported pursuant to an inadequacy of an administrative or procedural control in NTR Technical Specification 6.2.2(a)(2) because it could have caused the existence or development of an unsafe condition with regard to reactor operations. | ||
| ENS 53274 | 19 March 2018 18:30:00 | Non | Test and Research Reactor - Notification of Technical Specification Violation | At 1130 PST on 3/19/18, with the reactor at 100% power (100 kW thermal), GE Hitachi Vallecitos Nuclear Test Reactor violated their Technical Specifications (NDO 32765, section 6.1.3.1) when the licensed reactor operator became sick, called for the backup licensed reactor operator, and left the control room. The backup licensed operator entered the control room less than 30 seconds after the other operator left. There were other trained but unlicensed operators in the control room. The reactor remained at 100% power with no issues. This notification is the 24 hour notification required in accordance with GE Hitachi Vallecitos Nuclear Test Reactor Technical Specifications (NDO 32765, section 6.1.3.1). The Technical Specifications also require a 14 day written report which will be submitted. The facility has initiated a corrective action report (28168). GE Hitachi Vallecitos Nuclear Test Reactor, license R-33, is a 100 kW thermal Light Water Highly Enriched Graphite Moderated Reactor. The licensee notified their NRC Project Manager. |