ENS 47466: Difference between revisions

ENS 47466 +/-
Where
	National Inst Of Standards & Tech ; Gaithersburg, Maryland (NRC Region 1)
License number:	TR-5
Reporting
	Non
Time - Person (Reporting Time:+16.72 h0.697 days <br />0.0995 weeks <br />0.0229 months <br />)
Opened:	David Shawn O'Kelley; 14:43 Nov 22, 2011
NRC Officer:	Donald Norwood
Last Updated:	Nov 22, 2011
	47466 - NRC Website
	v • d • e

Latest revision as of 18:18, 24 November 2018

@@ Line 3: / Line 3: @@
 | facility = National Inst Of Standards & Tech
 | Organization =
-| license number = Tr-5
+| license number = TR-5
 | region = 1
 | state = Maryland

v t e ENS Event
22:00 Nov 21, 2011
Title	Confinement Not Maintained as Required by Technical Specifications
Event Description	Yesterday afternoon, while performing retests on replacement control shim arm switches, reactor operators placed the reactor in a condition that would allow more than one shim control rod to be withdrawn. This violated Technical Specification 3.4.1, "Operations that require confinement." The reactor facility did not have full confinement in place at that time. The specific language of Technical Specification 3.4.1 is "Confinement shall be maintained when changes of components or equipment within the confines of the thermal shield, other than rod drop tests or movement of experiments, are being made which could cause a significant change in reactivity." Although the shim control rods were not withdrawn and the rod bottom lights never cleared, the circumstances, in the licensee's opinion, were that they could have caused a significant change in reactivity, allowing more than one control rod to be withdrawn when the reactor was not in full confinement. The licensee notified the NRC Reactor Inspector.

v t e Emergency Notification System
National Inst Of Standards & Tech with Non
WEEKMONTHYEAR2015-03-07T13:30:00 [Table view]
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